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Department of
ZOOLOGY

Dr. D.D.G.L. Dahanayaka

B.Sc. Zoology (Kelaniya, SL), M.Phil (Kelaniya, SL), P.hD. (Ibaraki Univ., Japan), M.I.Biol (SL)

Senior Lecturer (Grade I)

Department of Zoology
  • Central Campus, Department of Zoology, Ground Floor, Science and Technology Building, Room No :001
  • Office: +94112884446, Mobile: +9471-3629605
  • dddah@ou.ac.lk ddgldahanayaka@gmail.com

Dr. Dahanayaka holds a B.Sc and an M.Phil from the University of Kelaniya in Sri Lanka, along with a Ph.D. and post-doctoral degrees from Japan’s Ibaraki University. With a career spanning over 12 years as a Scientist specializing in Remote Sensing for Coastal and Inland Water Environment monitoring at the National Aquatic Resources Research and Development Agency (NARA) in Sri Lanka, he has amassed a wealth of experience. Currently, Dr. Dahanayaka serves as a Senior Lecturer in the Department of Zoology at The Open University of Sri Lanka.

His extensive contributions to the field of Environmental Sciences are evident through his impressive portfolio, which includes over 200 articles and reports. Notably, 40 of these have been published in esteemed peer-reviewed international journals. Dr. Dahanayaka has also shared his expertise through 15 invited presentations delivered in various countries such as the USA, Japan, Vietnam, Indonesia, Pakistan, Cambodia, and Sri Lanka.

Over the past decade, he has fostered fruitful research collaborations with esteemed scientists from Japan, Sri Lanka, the USA, Vietnam, Cambodia, and Indonesia. Dr. Dahanayaka possesses a wide range of skills, from devising research programs and experimental design to conducting statistical analyses and crafting research publications. His talents extend beyond research into administration, management, and teaching. He has served on advisory committees in the fields of environmental science, fisheries, and aquaculture.

Furthermore, Dr. Dahanayaka excels in securing and overseeing collaborative projects with both local and international partners. He has also been instrumental in organizing and leading workshops, seminars, and lectures, demonstrating his commitment to knowledge dissemination and advancement in his field.

GIS and Remote Sensing, Climate Change, Wetland Ecology, Blue Carbon ecosystems

Climate Change impacts on Coastal Ecosystems, Blue Carbon ecosystems
  • Senior Lecturer: Department of Zoology, Faculty of Natural Sciences, The Open University of Sri Lanka (2016 onwards)
  • JSPS Postdoctoral Researcher: Graduate School of Science and Engineering, Ibaraki University, Japan (2013-2015)
  • Scientist: National Aquatic Resources Research and Development Agency (NARA), Sri Lanka (2007-2016)
  • Research Officer: National Aquatic Resources Research and Development Agency (NARA), Sri Lanka (2005-2007)
  • Research Assistant: National Science Foundation of Sri Lanka  (Grant No. RG/2004/Zoo/01) (2004 -2005)
  • Teaching Assistant: Department of Zoology, Faculty of Science, University of Kelaniya, Sri Lanka (2004)

Course coordinator (BSc Degree Program -Department of Zoology, Faculty of Natural Sciences, The Open University of Sri Lanka)
o Aquatic Biology (ZYU5300)
o Remote Sensing and GIS in Natural Resources Management (FNU5300)
o Fundamentals of EIA (FNU5302)
o Oceanography and Ocean Resources (ZYU6309)

Course coordinator (MSc in Environmental Science, Centre for Environmental Studies and Sustainable Development (CESSD), The Open University of Sri Lanka)
o Environmental Policy Planning and Assessment (ZYP9506)
o Climate Change (ZYPA604)

Program Coordinator–Diploma in Natural Resources and Ecotourism, The Open University of Sri Lanka

Visiting Lecturer
• Remote sensing for crop protection (CPBT 52092) – MSc in Crop Protection and Plant Biotechnology, Department of Plant and Molecular Biology, Faculty of Science, University of Kelaniya, Sri Lanka
• Natural Resources Management (ENMG 51014) – MSc in Environmental Management, Department of Zoology and Environmental Management, , Faculty of Science, University of Kelaniya, Sri Lanka
• Introduction to GIS and Remote Sensing (CRM 3012) – BSc. In Coastal and Marine Resources Management, Department of Coastal and Marine Resources Management, Faculty of Engineering and Management, Ocean University of Sri Lanka
• Remote Sensing and GIS for Coastal Planning (CRM 7022)- BSc. In Coastal and Marine Resources Management, Department of Coastal and Marine Resources Management, Faculty of Engineering and Management, Ocean University of Sri Lanka
• Remote Sensing (MaE 801) Honors Degree of bachelor of Science in Marine Engineering, Department of Marine Engineering, Faculty of Engineering and Management, Ocean University of Sri Lanka

Featured Research

  • Development of Integrated Coastal and Marine Spatial Planning (MSP) for Sri Lanka (2020 – to date)
  • Seagrass-Dugong conservation across the Indian and Pacific Ocean Basins: NARA Component on “Ensuring seagrass ecosystem values are incorporated into coastal area planning in Sri Lanka”, executed by The Mohamed bin Zayed Species Conservation Fund, with financing from the GEF (2015-2018)
  • Survey on Fishing Gear and Crafts of Sri Lanka, Faculty Research Grants -2019, Faculty of Natural Sciences, The Open University of Sri Lanka (2019)
  • A comprehensive assessment of the tilapias and indigenous fish species diversity and their food niche segregation in reservoirs and riverine habitats of Kala Oya river basin, Sri Lanka, Faculty Research Grants -2017, Faculty of Natural Sciences, The Open University of Sri Lanka (2017)
  • Kaken Research Grant – Japan, Grant-in-Aid for JSPS Fellows (2013-2015) – JPY 2,300,000 (https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13F03045/)
  • Formation of Cooperative Engineering Education Systems in Asia Pacific Countries, Kaken Research Grant – Japan, Grant-in-Aid for JSPS Fellows (2012-2017) – JPY 18,330,000.
  • Monitoring impacts of tsunami and recovery of flora and benthic fauna in Beruwala reef, southern coast, Sri Lanka – Fisheries Ministry of Sri Lanka (2005-2006).
  • Studies on species composition, abundance, and distribution of macrobenthos in Negombo estuary, Sri Lanka with the view of identifying indicator organisms of environmental conditions – National Science Foundation of Sri Lanka (2005 – 2009)
  • Feasibility of utilizing mangrove ecosystems for improvement of the livelihood of coastal communities – Nainamadama, Madampe lake and Kahadamodara area, Sri Lanka – Fisheries Ministry of Sri Lanka (2006 – 2008)
  • Development of strategies for seascape management – Puttalam lagoon and associated mangrove, coral reefs and sea grass habitats – NARA Sri Lanka (2008 – 2009).
  • Eco-tourism potential and economic valuation of mangrove ecosystems in western coast of Sri Lanka – NARA Sri Lanka (2008 -2009)
  • Development of strategies for management of mangrove reserve at Kadolkele, Sri Lanka – NARA Sri Lanka (2008 -2009)
  • Seed production, extermination of generic variations, monitoring of commercially level cultivation and site selection for expansion of seaweed, based on remote sensing and field sampling – Fisheries Ministry of Sri Lanka (2015-2016)
  • Dahanayaka, D.D.G.L. (2022). Negombo Estuary, Sri Lanka Threats and Management Plans. In: Baigún, C., Minotte, P. and Lamizana, B. (eds.). Wetlands and people at risk. Gland, Switzerland: IUCN. https://doi.org/10.2305/IUCN.CH.2022.09.en
  • Gorman, D., Jayakody, S., Kodikara, s., Udagedara, S.,Dahanayaka, D.D.G.L., Ranawana, K.B., Kumara,M. P., Pahalawattaarachchi, V., Thavanayagam, M., Steven, A., Gunawardana, J.A.A.L. and M.A. Vanderklift (2022), The status and future of blue carbon ecosystems in Sri Lanka: conservation, restoration and policy, Oceanography and Marine Biology: An Annual Review, 60:301-334.  https://doi.org/10.1201/9781003288602
  • D.D.G.L. Dahanayaka, H. Tonooka and S. Ozawa, Satellite Remote Sensing for Environmental Assessment of Water Bodies, LAP Lambert Academic Publishing, 184p. 2013.  ISBN 978-3-659-42676-6. URL
  • Dahanayaka, D.D.G.L.(2023) Identification Toolkit for most trafficked marine species in Sri Lanka, Environmental Foundation (Guaranteed) Limited, 52p.
  • Dahanayaka, D.D.G.L.(2023), Most Illegally Traded Marine Species, Environmental Foundation (Guaranteed) Limited, 56p. ISBN: 978-95523-1872-6
    • Dahanayake, H. D., Dahanayaka, D.D.G.L., Hudson, P., & Wickramasinghe, D. (2024). Analyzing land use changes and wetland dynamics: Muthurajawela urban wetland and its surroundings, Sri Lanka. Journal of Degraded and Mining Lands Management, 11(4), 6441–6452. https://doi.org/10.15243/jdmlm.2024.114.6441
    • Rajapaksha R.D.T., Dahanayaka D.D.G.L., Padmalal U.K.G.K. and Wijeyaratne W.M.D.N. (2024), Satellite-based assessment of water quality and associate land cover changes of selected five Villus in Wilpattu National Park, Sri Lanka, International Journal of Multidisciplinary Studies (IJMS), 11 (2): 34 – 62.
    • Suwandhahannadi, W.K., Loic Le De, D. Wickramasinghe, D.D.G.L. Dahanayaka (2024), Community participation for assessing and managing ecosystem services of coastal lagoons: A case of the Rekawa Lagoon in Sri Lanka, Ocean & Coastal Management, Vol 251, 107069. https://doi.org/10.1016/j.ocecoaman.2024.107069
    • Dahanayake,H., Dahanayaka, D.D.G.L., Hudson, P., & Wickramasinghe, D. (2024). Land use changes of coastal wetlands using remote sensing. A case study of Muthurajawela & Anawilundawa wetlands, Sri Lanka. TeMA – Journal of Land Use, Mobility and Environment, 17(1), 7-21. https://doi.org/10.6093/1970-9870/10281
    • Kariyawasan Patabendige, K.M., Amarasinghe, M.D., Ratnayake, R.M.C.S. & Dahanayaka, D.D.G.L. (2023) Impact of climate and irrigation practices on hydrological aspects of Bundala wetlands in Sri Lanka. Irrigation and Drainage, 1–10. https://doi.org/10.1002/ird.2797
    • Kotagama, O. W., Perera, K. A. R. S., & Dahanayaka, D. D. G. L. (2023). Floristic diversity and distribution of biomass carbon: A preliminary study of mangroves in Chilaw lagoon, Sri Lanka. Ceylon Journal of Science, 52(1), 91–97. DOI: http://doi.org/10.4038/cjs.v52i1.8108
    • Suwandhahannadi, WK and Wickramasinghe, D and Dahanayaka, DDGL and Le Dé, Loic, (2023) Blue Carbon Storage in a Tropical Coastal Estuary: Insights for Conservation Priorities.  http://dx.doi.org/10.2139/ssrn.4293060
    • Kotagama, O.W., Pathirage, S., Perera, K.A.R.S., Dahanayaka, D.D.G.L., Miththapala, S., Somarathne, S. (2022) Modeling predictive changes of blue carbon due to sea-level rise using InVEST model in Chilaw Lagoon, Sri Lanka. Model. Earth Syst. Environ. (2022). https://doi.org/10.1007/s40808-022-01521-4
    • Dahanayake, H.D., Wickramasinghe, D. and Dahanayaka, D.D.G.L. (2022). Do natural landscapes contribute to reducing Land Surface Temperature (LST)? A case study from Muthurajawela wetland, Sri Lanka. Journal of Degraded and Mining Lands Management 9(2):3329-3339. doi:10.15243/jdmlm.2022.092.3329
    • Kobayashi, H., Aung, H.T., Dahanayaka, G., Jo, H., Sritharapiphat, T., Tseng, K. and Vu, T.T. (2021), Forum of Remote Sensing in Asia: Common Research Topics and Challenges for International Collaboration and Data Sharing, Journal of Remote Sensing Society of Japan, 41(2): 328-343. https://doi.org/10.11440/rssj.41.328
    • Abeysinghe J.S. and Dahanayaka, D.D.G.L (2021), Development of Marine Mammal Stranding and Mortality Database Using GIS as a Forensic Tool, WILDLANKA Vol.9, No.3, pp. 340 -360.
    • Pahalawattaarachchi V. and Dahanayaka, D.D.G.L (2021), Diversity and Biomass of Seagrass in Gulf of Mannar, Palk Bay and Palk Strait, Sri Lanka, WILDLANKA Vol.9, No.3, pp. 301 -316.
    • Pahalawattaarachchi, V., Suraweera, P.A.C.N.B., Dahanayaka, D.D.G.L. , Pieris U.K.L. and W.A.K.D. Madurangika (2020) Feed preference and habitat requirement of dugongs in Sri Lankan waters:Evidence with stomach content analysis, WILDLANKA Vol.8, No.4, pp. 198 -205. URL
    •  Udagedara, S. and Dahanayaka, D.D.G.L. (2020), Current status and checklist of seagrass in SriLanka, International Journal of Aquatic Biology, 8(5): 317-320. http://orcid.org/0000-0003-3681-1924
    • Silva, S.G.T.M. , Dahanayaka, D.D.G.L. and M.J.S. Wijeyaratne (2020), A remote sensing approach for assessing the invasion of Najas marina in Madu Ganga Estuary, Sri Lanka, International Journal of Aquatic Biology, 8(5): 377-382. https://doi.org/10.22034/ijab.v8i5.886
    • M.L. Dilakshi Lekamge, M.J.S. Wijeyaratne and D.D.G.L. Dahanayaka and M.J.S. Wijeyaratne, Water quality parameters contributing to the invasion of water hyacinth (Eichhornia crassipes) in the Anawilundawa reservoir inSri Lanka, Sri Lanka Journal of Aquatic Sciences, Vol.25(1), pp. 9-17, (2020). http://doi.org/10.4038/sljas.v25i1.7572
    • D.D.G.L. Dahanayaka, Spatial data analysis for the marine fisheries and habitat management of Sri Lanka, Sri Lanka Journal of Aquatic Sciences, Vol. 23 (1), pp. 37-47 (2018). http://doi.org/10.4038/sljas.v23i1.7545
    • D. Rapoport, B.V. Bartak, A. Ali, C. Suraweera and D.D.G.L. Dahanayaka, Implementation of MFD algorithm in ArcGIS, WILDLANKA. 6(1): pp. 024-031 (2018). URL
    • P. Wang, Y. Ishikawa, D.D.G.L. Dahanayaka and A. Minato, Portable Water Color Monitoring System Using Microcontroller for Phytoplankton Bloom Measurement in Japanese Lake, International Journal of Modern Engineering Research (IJMER). 8(7): pp. 50-59 (2018). URL 
    • N. Perera, D.D.G.L. Dahanayaka and S. Udagedara, Habitat preference and population structure of two data deficient seahorse (Syngnathidae) species, OUSL Journal, the Open University of Sri Lanka, vol. 12, No 2 pp. 75-97 (2017). http://doi.org/10.4038/ouslj.v12i2.7408
    • S. Ozawa, D.D.G.L. Dahanayaka, N. Warnajith, S.B. Quarmal, Renovation of Research and Education in South Asian Countries by Means of ICT, OUSL Journal, the Open University of Sri Lanka, vol. 12, No 2. pp. 19-41(2017). http://doi.org/10.4038/ouslj.v12i2.7400
    • D.D.G.L. Dahanayaka (2017). Applications of satellite remote sensing for conservation and management of wetland ecosystems of Sri Lanka. In: Gloria Scientiam. M.J.S. Wijeyaratne and W.U. Chandrasekara eds. University of Kelaniya, Sri Lanka. pp. 255-263. URL
    • P.A.C.N.B. Suraweera and D.D.G.L. Dahanayaka (2017), Assessment, monitoring and management of Invasive Alien Species at Bundala National Park (A Ramsar Wetland) in Sri Lanka, Wetlands Sri Lanka, Central Environmental Authority, Sri Lanka, Vol. 3, PP. 80-85. URL
    • D.D.G.L. Dahanayaka, B.D.C. Perera, M.J.S. Wijeyaratne and H. Tonooka, Monitoring eutrophication trends in Bolgoda North Lake, Sri Lanka by Satellite Remote Sensing, Turkish Journal of Fisheries and Aquatic Sciences, vol. 16, pp. 563-570 (2016) DOI: 10.4194/1303-2712-v16_3_08.
    • D.D.G.L. Dahanayaka and P. Sivarajah (2016). Is Sri Lanka’s marine products exports competitive? Analysis of fisheries exports of Sri Lanka. AGRIEAST: Journal of Agricultural Sciences. 9, pp.36–41. DOI: http://doi.org/10.4038/agrieast.v9i0.19
    • D.D.G.L. Dahanayaka, H.D. Wimalesena, V. Pahalawattarachchi, Potential of the Conservation Oriented Mangrove Based Ecotourism; A Case Study of Kadolkele Mangrove Reserve, Negombo, Sri Lanka, Journal of National Aquatic Resources Research & Development Agency, Vol. 44, pp. 31-44, (2015). URL
    • D.D.G.L. Dahanayaka, S.B. Quarmal, K.N.S. Warnajith, G. Dassanayake, H. Tonooka, A. Minato and S. Ozawa, Expansion of the Remote Sensing Research on water environments of Asia through KISSEL Server System, ICT for Development Working Paper Series, Vol. 05, No. 1, pp. 54-63 (2015). URL
    • D.D.G.L. Dahanayaka,H. Tonooka, M.J.S. Wijeyaratne, A. Minato and S. Ozawa, Comparison of Three Chlorophyll-A Estimation Approaches Using ASTER Data Acquired Over Sri Lankan Coastal Water Bodies, Malaysian Journal of Remote Sensing & GIS, vol. 4, No. 1 pp. 21-29 (2015). URL
    • S.H.P.K.Lakesh, D.D.G.L. Dahanayaka, G. Anne Nisha, N. Warnajith, H. Tonooka, A. Minato and S. Ozawa, Development of inexpensive multi-parameter sensors based network system for water environment monitoring, International Journal of Environmental Sciences, vol. 5, No.2, pp. 341-352 (2014) DOI :10.6088/ijes.2014050100030.
    • S.H.P.K.Lakesh, D.D.G.L. Dahanayaka, H. Tonooka, A. Minato and S. Ozawa, Spectral Signatures Identifying Instrument on Spectroscopic Measurement Technique for Water Quality Monitoring, Advanced Materials Research, Trans Tech Publications, Switzerland, Vols. 838-841, pp. 2014-2018 (2014). https://doi.org/10.4028/www.scientific.net/AMR.838-841.2014
    • D.D.G.L. Dahanayaka,H. Tonooka, M.J.S. Wijeyaratne, A. Minato and S. Ozawa, Two decadal trends of surface chlorophyll-a concentrations in tropical lagoon environments in Sri Lanka using satellite and in-situ data, Asian Journal of Geoinformatics, Vol. 13, No. 3, pp. 15-25 (2013). URL
    • D.D.G.L. Dahanayaka, H. Tonooka, M.J.S. Wijeyaratne, A. Minato and S. Ozawa, Monitoring Land Use Changes and their Impacts on the Productivity of Negombo Estuary, Sri Lanka Using Time Series Satellite Data, Asian Fisheries Science, Vol. 25, pp. 97-112, (2012).
      https://doi.org/10.33997/j.afs.2012.25.1.009
    • D.D.G.L. Dahanayaka, Circumstances of Remote Sensing Applications and Educations in Sri Lanka, Journal of the Remote Sensing Society of Japan, Vol. 32, No. 3, pp. 160-163, 2012. https://doi.org/10.11440/rssj.32.160
    • H.B. Jayasiri and D.D.G.L. Dahanayaka, Saltwater Intrusion and Its Impact on Koggala Lagoon and Associated Waters, Southern Coast of Sri Lanka, Asian Journal of Water, Environment and Pollution, Vol. 9, No. 2, pp. 73-84, (2012). URL
    • V. Patu, E. T Ualesi, A Ualesi, K N S Warnajith, D.D.G.L. Dahanayaka, A Minato, H. Noguchi and S. Ozawa, How to give support to E-Learning System for students by the application of portable machines as mobile terminals, Journal of Interactive Learning Research (JILR), Association for the Advancement of Computing in Education, Vol. 23, pp. 112–138, (2011).
    • V. Patu, H. Salanoa, E.T. Ualesi, A. Ualesi, K.N.S. Warnajith, D.D.G.L. Dahanayaka, A Minato, H. Noguchi and S. Ozawa, Teachers experience as e-learning students based on a case study conducted within the National University of Samoa, Journal of Pacific Studies (JPacS), Vol. 30, pp. 75–89, (2011).
    • D.D.G.L. Dahanayaka, Benthic macrobenthos of the estuaries and lagoons in Sri Lanka, Seshaiyana, Annamalai University, India, Vol. 16, No. 3, pp. 4-7, 2009. URL
    • S.C.Jayamanne and D.D.G.L. Dahanayaka, Post tsunami recovery of fauna and flora of the Barberyn reef, Beruwala, Sri Lanka, Journal of National Aquatic Resources Research & Development Agency, Vol. 39, pp. 49-58, (2009). URL
    • D.D.G.L. Dahanayaka, S.C. Jayamanne and S.U.P. Jinadasa, Preliminary investigations on the abundance, distribution and diversity of benthic invertebrates and sediment texture in marine environment of Palk Strait, off Jaffna, Sri Lanka. Journal of National Aquatic Resources Research and Development Agency, Vol. 38, pp. 33-44, (2007). URL
    • D.D.G.L. Dahanayaka and M.J.S. Wijeyaratne, Diversity of macrobenthic community in the Negombo estuary, Sri Lanka with special reference to environmental conditions, Sri Lanka Journal of Aquatic Sciences, Vol. 11, pp. 43-61, (2006). DOI: 10.4038/sljas.v11i0.2222
    • D.D.G.L. Dahanayaka and W.A. Sumanadasa, Mangroves in Kadolkale, Negambo estuary, Sri Lanka. Sri Lanka Naturalist journal of ecology and nature, Vol. 7, No 03-04, pp. 4-8, (2005).
    • D.S. Jayakody and D.D.G.L. Dahanayaka, Diversity of Fishing Practices and Resources Conservation in Negombo Lagoon, Sri Lanka Naturalist, Vol. 6, No. 01-02, pp. 29-31, (2005).
    • D.D.G.L. Dahanayaka, Some notes on macrobenthos in estuaries with an emphasis on macrobenthic community structure of Negombo estuary, Sri Lanka Naturalist, Vol. 6, No. 3-4, pp. 26-31, (2004).

 

    • Rajapaksha, R.D.T., Dahanayaka, D.D.G.L., Padmalal, U.K.G.K. and W. M. D. N. Wijeyaratne (2024), Estimation of Carbon Sequestration Capacity of The Wilpattu National Park, Sri Lanka: A Remote Sensing Based Non-Destructive Approach, International Conference on Waste Recycling and Environmental Technology (WRET-2024), Lucknow, India, p84.
    • Jayasinghe, C.D., Dahanayaka, D.D.G.L. and O. Bandaranayaka (2024) Decoding Epigenetic Mechanisms of Phenotypic Plasticity of Mangroves: A Systematic Review, Proceedings of the 2nd International Conference on Mangroves for Ecological & Economic Sustainability, The Open University of Sri Lanka, pp28.
    • Rajapaksha, R.D.T., W.K. Suwandahannadi and D.D.G.L. Dahanayaka (2023), Satellite based analysis of spatial distribution and dynamics of mangrove ecosystems and other land uses in Rekawa, Lagoon, Sri Lanka, Proceedings of the 1st International Conference on Mangroves for Ecological & Economic Sustainability, The Open University of Sri Lanka, pp60-61.
    • Dahanayake, H., Dahanayaka, D.D.G.Land Hudson and D. Wickramasinghe (2023), Mapping and monitoring of mangrove ecosystems using Satellite Remote Sensing: Case study in Muthurajawela wetland, Sri Lanka , Proceedings of the 1st International Conference on Mangroves for Ecological & Economic Sustainability, The Open University of Sri Lanka, pp58-59.
    • Suwandhahannadi, W.K., Wickramasinghe, D., Dahanayaka, D.D.G.L. and Le De, L., (2023), Assessment of blue carbon stocks in tropical mangrove forests, Rekawa Lagoon, Sri Lanka, Proceedings of the National Aquatic Resources Research and Development Agency (NARA) Scientific Sessions, 2023.
    • Suwandhahannadi, W.K., Wickramasinghe, D., Dahanayaka, D.D.G.L., Loic Le De, Gammanpila, M., (2023), Identification of potential areas for aquaculture using spatiotemporal dynamics of water quality in the Rekawa Lagoon, Proceedings of the Annual Research Symposium 2023, University of Colombo, p. 227.
    • Suwandhahannadi, W.K., Wickramasinghe, D., Dahanayaka, D.D.G.L., Loic Le De, (2023), Community perception of lagoon Ecosystem Services and conservation priorities: a case study from Rekawa Lagoon, Sri Lanka, Proceedings of the Annual Research Symposium 2023, University of Colombo, p.228
    • Dahanayake, H., Dahanayaka, D.D.G.L and Hudson and D. Wickramasinghe (2023), LULC changes in urban wetlands: Case study in Muthurajawela wetland, Sri Lanka using intensity analysis method, Proceedings of the Annual Research Symposium 2023, University of Colombo, p.229.
    • Suwandhahannadi, W.K., Wickramasinghe, D., Dahanayaka, D.D.G.L., Loic Le De, Gammanpila, M., (2023), Effect of monsoons on species composition, density of zooplankton assemblages, and water quality of Rekawa Lagoon, Sri Lanka. Proceedings of the Fifth Research Symposium of the Ocean University of Sri Lanka, p. 26.
    • Ilanperuma, H.N., Jayanatha, J.S. and Dahanayaka, D.D.G.L., (2023) Spatial and temporal heterogeneity of marine debris on selected beaches of the Southern coast of Sri Lanka, Proceedings of the Fifth Research Symposium of the Ocean University of Sri Lanka, p. 33.
    • Lakmali, P.L.N. and Dahanayaka, D.D.G.L. (2023), Oceanography Determinants of the Occurrence of Dolphins and Whales in Southern Sri Lanka, Proceedings of the Open University Research Sessions 2023, p. 102.
    • Dahanayake, H.D, Wickramasinghe, D., Dahanayaka, D.D.G.L  and Hudson, Paul (2022), Wetland transformation: A case study of Land Use and Land Cover changes in Muthurajawela Wetland Complex, Proceedings of Annual Research Symposium 2022, University of Colombo, Sri Lanka, pp321.
    • Kotagama, O.W. , K.A.R.S. Perera, D.D.G.L. Dahanayaka, S. Somaratne and  S. Pathirage (2022),  Application Of Invest Model to Evaluate Blue Carbon Dynamics In The Chilaw Lagon, Sri Lanka, Proceeding of the International Open University Research Sessions (iOURS 2022), pp147.
    • Kotagama, O.W. , K.A.R.S. Perera, D.D.G.L. Dahanayaka, S. Somaratne (2022), Floristic diversity and distribution of biomass carbon of selected areas in the Chilaw Lagoon, Sri Lanka, Proceeding of the International Open University Research Sessions (iOURS 2022), pp148.
    • Jayasinghe, C.D., D.D.D.H. Alwis, L.A. Wijenayaka, D.T. Abeysinghe, D.D.G.L. Dahanayaka, U.A. Jayawardena (2022) Virtual intervention on career readiness of undergraduates during the pandemic lockdown: significance, constraints and implications for future, Proceeding of the International Open University Research Sessions (iOURS 2022), pp2.
    • Perera, W.P.T.A., Wickramasinghe, D. and Dahanayaka, D.D.G.L. (2021), Satellite Remote Sensing Observations of the Changes of Night Lighting in the Hambantota Area, 14th International Research Conference, General Sir John Kotelawala Defense University, p 13. URL
    • Alawattegama, R.D.D.W.M.R.S. and Dahanayaka, D.D.G.L. (2021), Assessing spatial allocation of coastal and marine utility areas in the North-Western region of Sri Lanka, Proceedings of the Young Scientists Conference on Multidisciplinary Research-2021, Young Scientists Association, National Institute of Fundamental Studies, Sri Lanka, P 55.
    • Dahanayake H.D., Wickramasinghe D., Dahanayaka D.D.G.L., (2021). Do wetlands contribute to “Cooling Effects. A Case study from Anawilundawa Ramsar Site, Sri Lanka, International Conference on Multidisciplinary Approaches In Science, Faculty of Science, University Of Colombo, Sri Lanka, 26th of November 2021.
    • Dahanayake H.D., Wickramasinghe D., Dahanayaka D.D.G.L. (2021). Cooling effect from wetlands: a nature-based solution for disaster resilience? Proceedings of Big Earth Data for Disaster Risk Reduction and Sustainable Development Goals, International Forum on Big Data for Sustainable Development Goals (FBAS), China, P.33, 06th of September 2021.
    • Dahanayaka D.D.G.L. (2021). Geospatial data to mitigate the COVID-19 impacts of the fisheries sector, Proceedings of the Twenty Seventh Scientific Sessions of the Sri Lanka Association for Fisheries and Aquatic Resources, 10th December 2021, pp. 12 -16.
    • Michael, J. R., De Silva, Y. Y. K. and Dahanayaka D.D.G.L. (2021). Assessing the impact of COVID-19 on fisheries production and exports in Sri Lanka & forecasting future trends,Proceedings of the Twenty Seventh Scientific Sessions of the Sri Lanka Association for Fisheries and Aquatic Resources, 10th December 2021, pp. 34.
    • Thenuvathany, B., Dahanayaka, D.D.G.L., Muraleetharan, S., Suvanthini, T. and Gajapathy, K. (2021), Identification of Microplastics in selected beaches of Jaffna Distrct, Sri Lanka, Proceedings of International Conference on Environmental Governance 2021, CEA, Colombo, pp 36.
    • Madushani, K. P. K., Amarasinghe, M. D., Ratnayake, R. M. C. S. and Dahanayaka, D.D.G.L. (2021), An ethnobotanical approach to control Typha angustifolia: A case study from Sri Lanka, Selected papers from the International Conference on Applied and Pure Sciences (ICAPS 2021) Vol 01, pp 15-21.
    • Rathnasri, P.A.S.A., Jayasiri, H.B. and Dahanayaka, D.D.G.L., (2020) Diversity, Abundance and Composition of Phytoplankton in Coastal Waters of Off Crow Island Beach Park with Reference to Physico-Chemical Parameters, Research Symposium of the Ocean University of Sri lanka–2020, pp. 39.
    • Sujeewani, S.A.S., Amarathunga, A.A.D. and Dahanayaka, D.D.G.L. (2020) Assessment of Marine Litter in Selected Beaches of Southern and Western Part of Sri Lanka, Research Symposium of the Ocean University of Sri lanka–2020, pp. 27.
    • Abeysinghe, H., Dahanayaka D.D.G.L. and D. Wickramasinghe (2020), A preliminary study on human influence on the water quality of the Koggala Lagoon, Sri Lanka. International Conference on Frontiers in Chemical Technology, Institute of Chemistry Ceylon, Sri Lanka, pp.95.
    • Madushani, K.P.K., Amarasinghe, M.D., Ratnayake, R.M.C.S. and D.D.G.L. Dahanayaka (2020), Spatial distribution of the water quality parameters in the Embilikala lagoon of Bundala National Park, Sri Lanka, Proceedings of the National Conference on Multidisciplinary Research 2020, National Institute of Fundamental Studies, Kandy, Sri Lanka, pp. 8.
    • Abeysinghe, H., Dahanayaka D.D.G.L. and D. Wickramasinghe (2020) Chlorophyll-a estimation of Koggala Lagoon using Remote Sensing, Proceedings of the 40th Annual Sessions of the Institute of Biology, Institute of Biology, Sri Lanka, pp 32.
    • Suwandhahannadi, W.K., Amarathunga, A.A.D. and D.D.G.L. Dahanayaka (2020), Temporal variation of physico-chemical parameters and primary productivity in Malala Lagoon, Proceedings of NARA Scientific Sessions 2020, pp. 18.
    • Madushani, K.P.K., Ratnayake, R.M.C.S., Dahanayaka, D.D.G.L. and M.D. Amarasinghe (2020), Carbon sequestration potential of Typha angustifolia in Embilikala lagoon in Bundala wetland of Southern Sri Lanka, Proceedings of 7th Ruhuna International Science & Technology Conference University of Ruhuna, Matara, Sri Lanka, pp 108.
    • Suwandhahannadi, W.K., Amarathunga, A.A.D. and D.D.G.L. Dahanayaka (2020) Composition, Density and Diversity of Plankton in Malala Lagoon, Southern Sri Lanka, Proceedings of the Scientific Sessions of the Sri Lanka Association for Fisheries and Aquatic Resources (SLAFAR), University of Kelaniya, Sri Lanka, pp. 8.
    • Illukthanna, U., Dassanayake, G., Ozawa, S., Minato A. and D.D.G.L. Dahanayaka (2020), Planning and Implementation of the Knowledge Integration Server System for E-Learning (KISSEL) using Cloud Environment, International Conference on Teaching, Education & Learning, 14-15 December 2020, Tokyo, Japan.
    • Madushani, K.P.K., Ratnayake, R.M.C.S., Dahanayaka, D.D.G.L. and M.D. Amarasinghe, Trend analysis of monthly rainfall over past 30 years in Bundala region, 1st International Conference on Biodiversity and Environmental Management 2019, pp 14.
    • Madushani, K.P.K., Amarasinghe, M.D., Ratnayake, R.M.C.S. and D.D.G.L. Dahanayaka, In-vitro and in-vivo seed germination percentage of Typha angustifolia, International Postgraduate Research Conference 2019, University of Kelaniya, Sri Lanka, PP 59.
    • T.A Hangawatta, Fernando, T.S.P. and D.D.G.L. Dahanayaka, (2019). Spatial and temporal variation of fish assemblages and their associations in the Kala Oya River basin, Sri Lanka. Proceedings of the Annual Research symposium, Open University of Sri Lanka. pp 16.
    • P.A.C.N.B. Suraweera, S.M.P.Prasanna, D.D.G.L.Dahanayaka, and M.R.Wijesinghe, Predation of turtle eggs and nestlings by Tatera indica and Golunda ellioti in Sri Lanka: A first time observation, 39th Annual Symposium on Sea Turtle Biology and Conservation, Feb 2, 2019, Charleston, USA.
    • K. Kamalendran, D.D.G.L. Dahanayaka, D. Wickramasinghe, A preliminary investigation of diversity and distribution of zooplankton in relation to the water quality in selected locations of Kala Oya River basin, Sri Lanka, Annual Research Symposium –2018, Faculty of Science, University of Colombo, pp 230.
    • T.A. Hangawatta, D.D.G.L. Dahanayaka, Fish species composition and diversity variations in Kala Oya River basin, Sri Lanka with relation to environmental factors, The 14th International Student Conference in Ibaraki, Japan, Dec. 2018.
    • M. L. D. Lekamge, D.D.G.L. Dahanayaka and M.J.S. Wijeyaratne, Assessment of the invasion of water hyacinth (Eichhornia crassipes) using GIS and RS approach in Anawilundawa sanctuary, a Ramsar wetland in the western dry zone of Sri Lanka, 24th Annual Scientific Sessions, Sri Lanka Association for Fisheries and Aquatic Resources, Kelaniya, Sri Lanka, pp. 29-30, Jun. 2018.
    • D. Rapoport, B.V. Bartak, C. Suraweera and D.D.G.L. Dahanayaka (2018), Multiple flow direction algorithm in quantifying catchment area-forest relationship of Kelani River in Sri Lanka, Proceedings of the annual session of Department of Wildlife Conservation, 7th -9th Aug 2018, Colombo, pp. 48.
    • V. Pahalawattaarachchi and D.D.G.L. Dahanayaka (2018), Abundance, Distribution and Diversity of Seagrass species in Gulf of Mannar, Palk Bay and Palk Strait, Sri Lanka, Proceedings of the annual sessions of Department of Wildlife Conservation, 7th -9th Aug 2018, Colombo, pp. 16.
    • S. Udagedara and D.D.G.L Dahanayaka, The species composition and distribution of Seagrass in the Valaichchenai Lagoon, Sri Lanka, International Seagrass Biology Workshop 13 (ISBW), National University of Singapore, pp. 129, Jun. 2018.
    • V. Pahalawattaarachchi, D.D.G.L. Dahanayaka, P.A.D.A. Kumara and R. Weerasingha (2018), Variation in growth rates and Carrageenan properties of Kappaphycus alvarezii at commercial culture site in Killinochchi district, SLCARP International Agricultural Research Symposium 2018, Sri Lanka Council for Agricultural Research Policy, 13-14 Aug 2018, Colombo, Sri Lanka, p. 116.
    • D.D.G.L. Dahanayaka (2017) Remote Sensing as an efficient tool for development of Fisheries and Aquaculture Sector, Proceedings of International Conference of the Aerospace Science & Engineering (ICASE 2017), pp. 39-40.
    • D.D.G.L. Dahanayaka, V. Pahalawattaarachchi (2017) Remote-Sensed mapping of seagrass distribution in Palk Bay, Sri Lanka, using high spatial resolution WorldView-2 satellite data, Asian Conference on Remote Sensing – 2017, October 23-27, 2017, New Delhi, India, 557 p.
    • D.D.G.L. Dahanayaka, K.N.S. Warnajith, M. Itaba, A. Minato and S. Ozawa (2017), An example of usage of KISSEL for educational platform in Sri Lanka, Science and Technology for Sustainable Development in the Pacific” Conference, Apia, Samoa (https://www.nus.edu.ws/s/index.php/133-science-conference/648-an-example-of-usage-of-kissel-for-educational-platform-in-sri-lanka).
    • A.A.D. Amarathunga, D.D.G.L. Dahanayaka, S.A.M. Azmy, V. Pahalawattaarachchi and N.D. Hettige, Assessment of the Environmental Damage Caused Due to Oil Spill Incident at Lunawa lagoon, Theldiyawatta, Muthurajawela, Proceedings of the Third National Symposium on Marine Environment, 7th Oct 2017, pp.17. 2017.
    • M.Gammanpila, D.D.G.L.Dahanayaka, V.Pahalawattaarachchi and H.M.P.Kithsiri, Variations in water quality conditions and functional habitats in Negombo lagoon with special reference to seabass cage culture practice, The 4th International Conference on Fisheries and Aquaculture – 2017,  At Colombo, Sri Lanka pp. 4, Aug. 2017.
    • S. Udagedara and D.D.G.L Dahanayaka, Seagrass of Sri Lanka: Research Priorities and Conservation Challenges, Proceedings of Wild Lanka International Symposium-2017, Department of Wildlife Conservation of Sri Lanka, At Colombo, Sri Lanka pp. 49, Aug. 2017.
    • U.S.C. Udagedara, D.D.G.L Dahanayaka and P.B.T.P. Kumara, Current Status of the Seagrass of Sri Lanka and their Research Needs Related to Climate Change, International Conference on Climate Change 2017, Colombo, Sri Lanka, pp. 46, Feb. 2017.
    • P.A.C.N.B. Suraweera, B.H.G.K. Kumari and D.D.G.L. Dahanayaka, Assessment of invasive alien species at Bundala Ramsar wetland, Sri Lanka for their control and management, Proceedings of the National Symposium on Invasive Alien Species 2017, Waters Edge, Battaramulla, Sri Lanka, pp. 14, Jan. 2017. URL
    • H.B. Jayasiri, D.D.G.L. Dahanayaka and K. Arulananthan,Diversity and abundance of marine plankton and benthos of Maruthankerny, off Jaffna, Sri Lanka, Proceedings of the International Forestry and Environment Symposium 2016, Department of Forestry and Environment Science, University of Sri Jayewardenepura, Sri Lanka, pp. 16,Sep. 2016.
    • H.D. Wimalasena, D.D.G.L. Dahanayaka, K.H.M.L. Amaralal, ICT applications for strengthening of fisheries information system: A Sri Lankan experience, Proceedings of the International Symposium on ICT for Sustainable Development 2016 (ICTSD 2016), University of Kelaniya, Sri Lanka, pp. 11, 10-12 August 2016.
    • D.D.G.L. Dahanayaka, H. Tonooka, M.J.S. Wijeyaratne, A. Minato and S. Ozawa, Remote Sensing Techniques for Environment Conservation of water Bodies in Japan and Sri Lanka, The International Symposium on ICT in Development 2015 (ISICTD2015), National University of Samoa, November 25-27, 2015.
    • T.M.S.D.G. Silva, D.D.G.L. Dahanayaka and M.J.S. Wijeyaratne, Assessment of invasion of Najas marina, Linnaeus 1753 in Madu Ganga Estuary, Sri Lanka using ASTER data of Terra satellite, Proceedings of the 35th Annual Sessions of the Institute of Biology, pp 32, September 25, 2015.
    • S.H.P.K.Lakesh, D.D.G.L. Dahanayaka, Jiazhenzhen, A. Minato, Turbidity monitoring of water bodies using color measurement system, The 10th International Student Conference at Ibaraki University, Ibaraki, Japan, November 15-16, D02,  2014.
    • D.D.G.L. Dahanayaka, M.J.S. Wijeyaratne, H. Tonooka, A. Minato, S. Ozawa, B. D. C. Perera, Monitoring and predicting eutrophication of Sri Lankan inland waters using ASTER satellite data,Proc. SPIE 9240, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2014, 92400I, Amsterdam, Netherlands, 22 – 25 September 2014; doi:10.1117/12.2067127 
    • D.D.G.L. Dahanayaka, H. Tonooka, A. Minato and S. Ozawa, Assessing the potential of satellite and ground spectral data for Chlorophyll-a monitoring in Lake Kasumigaura, Japan, International Geoscience and Remote Sensing Symposium (IGRASS 2014), Québec, Canada, pp 3350-3353, 13-18 July 2014.
    • D.D.G.L. Dahanayaka, H. Tonooka, M.J.S. Wijeyaratne, A. Minato and S. Ozawa, Use of KISSEL server as a platform for the expansion of research on the water quality of Asian water bodies, Proceedings of the International Symposium on ICT for Environmental Sustainability (ICTES 2014), University of Kelaniya, Sri Lanka, pp. 70-71, 23-25 June 2014.
    • B.D.C. Perera, M.J.S. Wijeyaratne, D.D.G.L. Dahanayaka, H. Tonooka, A. Minato and S. Ozawa, Study of eutrophication trends in Bolgoda north lake, Sri Lanka using satellite and in-situ data, Proceedings of the International Symposium on ICT for Environmental Sustainability (ICTES 2014), University of Kelaniya, Sri Lanka, pp. 23, 23-25 June 2014.
    • D.D.G.L. Dahanayaka, H. Tonooka, M.J.S. Wijeyaratne, A. Minato and S. Ozawa, Remote Sensing for Water quality surveillance in inland waters: the case study of Lake Kasumigaura, Japan, Proceedings of International Congress on Natural Science & Engineering (NSE), Kyoto, Japan, pp. 889-893, 7-9 May 2014.
    • D.D.G.L. Dahanayaka, H. Tonooka, M.J.S. Wijeyaratne, A. Minato and S. Ozawa, Feasibility Study for the Estimation of the Chlrophyll-a Using ASTER Data in an Eutrophic Lake, Sri Lanka, Proceedings of Japan Geoscience Union Meeting 2014 at Pacifico Yokohama, Kanagawa, Japan, 28 April – 02 May 2014.
    • D.D.G.L. Dahanayaka, H. Tonooka, A. Minato and S. Ozawa, Monitoring mangrove distribution and changes in Mekong Delta, Vietnam using Remote Sensing Approach, International Geoscience and Remote Sensing Symposium (IGRASS 2013), Melbourne, Australia, pp. 1583-1586, 21-26 July 2013.
    • D.D.G.L. Dahanayaka, H. Tonooka, A. Minato and S. Ozawa, Chlorophyll monitoring of selected Asian water bodies using modified band-ratio approaches with satellite data, Proceedings of the International Symposium on Remote Sensing 2013 (ISRS 2013), Chiba, Japan, pp. 881-884, May 2013.
    • U.S.C. Udagedara and D.D.G.L. Dahanayaka, Preliminary study on avifaunal diversity at NARA mangrove reserve, Kadolkele, Negombo, 19th Annual Scientific Sessions, Sri Lanka Association for Fisheries and Aquatic Resources, NARA, Colombo, Sri Lanka, pp. 7, May 2013.
    • D.D.G.L. Dahanayaka, H. Tonooka, M.J.S. Wijeyaratne, A. Minato and S. Ozawa, Retrieval of Chlorophyll- a using satellite and ground spectral data in Japanese and Sri Lankan water bodies, Asia Pacific Remote Sensing Conference (SPIE 2012), Kyoto, Japan, Nov 2012.
    • Wang Liang, S.H.P.K.Lakesh, D.D.G.L. Dahanayaka, Atsushi Minato, Satoru Ozawa, Portable spectroscopic measurement system for water monitoring, The 8th International Student Conference at Ibaraki University, Ibaraki, Japan, Nov. 2012.
    • D.D.G.L. Dahanayaka, H. Tonooka, M.J.S. Wijeyaratne, A. Minato and S. Ozawa, Use of Satellite imagery for water quality monitoring in coastal waters of Sri Lanka and inland waters of Japan, Marine Fish 2012, Negombo, Sri Lanka, Aug 2012.
    • D.D.G.L. Dahanayaka, H. Tonooka, M.J.S. Wijeyaratne, A. Minato and S. Ozawa, Chlorophyll-a Monitoring in Sri Lankan Estuaries Using ALOS/ AVNIR-2 Data, International Geoscience and Remote Sensing Symposium (IGRASS 2012), Munich, Germany, P. 493, July 2012.
    • D.D.G.L. Dahanayaka, H. Tonooka, M.J.S. Wijeyaratne, A. Minato and S. Ozawa, Development of Coastal Water Body Database on KISSEL Server, 11th International conference on InformationTechnology Based Higher Education and Training (ITHET 2012), Istanbul, Turkey, pp.3-4, Jun 2012.
    • G. Dassanayake, N. Warnajith, D.D.G.L. Dahanayaka, H. Tonooka, A. Minato, S. Ozawa and M.P.M. Perera, The Planning, Implementation and Economics of the Knowledge Integration Server System for E-Learning (KISSEL), 11th International conference on Information Technology Based Higher Education and Training (ITHET 2012), Istanbul, Turkey, pp.9-10, Jun 2012.
    • N. Warnajith, G. Dassanayake, D.D.G.L. Dahanayaka, H. Tonooka, A. Minato, S. Ozawa and M.P.M. Perera, Prototype of E-Learning Management System for Secondary School in Sri Lanka, 11th International conference on Information Technology Based Higher Education and Training (ITHET 2012), Istanbul, Turkey, pp. 10, Jun 2012.
    • D.D.G.L. Dahanayaka, H. Tonooka, M.J.S. Wijeyaratne, A. Minato and S. Ozawa, Coastal water body database to monitor in the water quality and land use changes from Remote Sensing data, Proc. of the 52nd Conference of the Remote Sensing Society of Japan (RSSJ), Tokyo, pp. 273-274, May 2012.
    • D.D.G.L. Dahanayaka, H. Tonooka, M.J.S. Wijeyaratne, K.N.S. Warnajith, G. Dassanayake, A. Minato and S. Ozawa, Remote Sensing as a Tool for Sustainable Management of Estuaries and Lagoons of Sri Lanka, International Seminar on Sustainability Science and ICT (ISSSICT 2012), Ibaraki University, Japan, March 2012.
    • D.D.G.L. Dahanayaka, H. Tonooka, M.J.S. Wijeyaratne, A. Minato and S. Ozawa, Change Detection in the Channel Segment of Negombo Estuary, Sri Lanka using Time Series Satellite Data and its Possible Impacts on Estuarine Productivity, The 9th Asian Fisheries and Aquaculture Forum, Shanghai Ocean University, China, pp. 156-157, April, 2011.
    • D.D.G.L. Dahanayaka, H. Tonooka, M.J.S. Wijeyaratne, A. Minato and S. Ozawa (2011) Integration of Multisource data for Chlorophyll-a  Monitoring in Negombo estuary, Sri Lanka, International Geoscience and Remote Sensing Symposium (IGRASS 2011), Vancouver, Canada, pp. 2149-2152, July 2011.
    • D.D.G.L. Dahanayaka, H. Tonooka, M.J.S. Wijeyaratne, A. Minato and S. Ozawa, Evaluation of Chlorophyll retrieval algorithm using an intermittently closed tidal estuary: The Chilaw lagoon in the west coast of Sri Lanka, Proceedings of the 51st Conference of the Remote Sensing Society of Japan (RSSJ), Aomori, Japan, pp. 55-56, Nov. 2011.
    • D.D.G.L. Dahanayaka,H. Tonooka, M.J.S. Wijeyaratne, K.N.S. Warnajith, A. Minato and S. Ozawa Water quality monitoring in tropical estuarine waters using Satellite Remote Sensing data – case studies from Sri Lanka, The 7th International Student Conference at Ibaraki University, Ibaraki, Japan, O-206, Dec. 2011.
    • S.H.P.K.Lakesh, D.D.G.L. Dahanayaka, A. Minato, H. Tonooka, M. Itaba and S. Ozawa, Development of portable Spectrometer for Environment monitoring, The 7th International Student Conference at Ibaraki University, Ibaraki, Japan, O-111, Dec. 2011.
    • N. Warnajith, G. Dassanayaka, D.D.G.L. Dahanayaka, S.B. Quarmal, V. Patu, A. Minato and S. Ozawa, Effective Data Synchronization Process Based on KISSEL, The 7th International Student Conference at Ibaraki University, Ibaraki, Japan, P-049, Dec. 2011.
    • D.D.G.L. Dahanayaka, H. Tonooka, A. Minato, G. Dassanayake, M.J.S. Wijeyaratne and S. Ozawa, Preliminary estimation of chlorophyll concentration in a tropical coastal lagoon in Sri Lanka using satellite data and in-situ measurements, Proceedings of the 49th Conference of the Remote Sensing Society of Japan (RSSJ), Kagoshima, Japan, pp. 17-18, Nov. 2010.
    • D.D.G.L.Dahanayaka, M.J.S. Wijeyaratne, G. Dassanayake, K.N.S. Warnajith, H. Tonooka, A. Minato and S. Ozawa, Spatial Distribution of Seagrass species and associated fauna in the Lagoon Environment: Case study in Puttalam Lagoon, Sri Lanka, Proceedings of the 6th International Student Conference at Ibaraki University, Japan, pp.168-169, Nov. 2010.
    • K.N.S. Warnajith, G. Dassanayake, D.D.G.L.Dahanayaka, A. Minato and S. Ozawa, Development of Data Managing System in Common with Moodle and Xoops, Proceedings of the 6th International Student Conference at Ibaraki University, Japan, pp. 57-58, Nov. 2010.
    • M. Gammanpila, D.D.G.L. Dahanayakaand H.B. Jayasiri, Effects of some anthropogenic activities on limnological characteristics, seasonal abundance and distribution of zooplankton of Negombo lagoon in Sri Lanka, International conference on knowledge Management for Sustainable development, Kathmandu, Nepal, pp. 51, Dec. 2009.
    • D.D.G.L. Dahanayaka,M.J.S. Wijeyaratne and S.C. Jayamanne, Macrobenthic Community Structure in Relation to Land Based Pollution – Case Study in a Tropical Estuary in the West Coast of Sri Lanka, Proceedings of the 5th International Student Conference at Ibaraki University, Japan, pp. 117-118, Nov. 2009.
    • H.B. Jayasiri andD.D.G.L. Dahanayaka,Use of Chlorophyll- a to determine the trophic status of coastal lagoons in Sri Lanka, Water Resources Research in Sri Lanka, Symposium Proceedings of The Water Professionals’ Day, Geo-Informatics Society of Sri Lanka (GISSL), Kandy, Sri Lanka, pp. 45-52, Oct. 2009.
    • D.D.G.L. Dahanayaka, A preliminary study on the distribution of seagrass communities and associated faunal diversity in the Puttalam lagoon, Sri Lanka, First National Symposium on Natural Resource Management, Department of Natural Resources, Sabaragamuwa University of Sri Lanka, pp. 47, Aug. 2009.
    • D.D.G.L. Dahanayaka,S.C. Jayamanne and M.J.S. Wijeyaratne, Benthic Invertebrates of a Tropical Estuary in the Western Coast of Sri Lanka, Proceedings of International Conference on Environmental Research & Technology, Parkroyal Penang, Malaysia, pp. 476-481, May 2008.
    • M. Gammanpila, and D.D.G.L. Dahanayaka, A study on finfish and shellfish species in the NARA mangrove reserve, Kadolkele, Negombo, Sri Lanka, Proceedings of the 64th Annual Sessions, Sri Lanka Association for the Advancement of Science, pp. 73, Dec. 2008.
    • D.D.G.L.Dahanayaka and W.A. Sumanadasa, Floral composition and vegetation structure of NARA mangrove reserve, Kadolkele, Sri Lanka and guidelines for conservation, Proceedings of the 12th International Forestry and Environment Symposium, Department of Forestry and Environment Science, University of Sri Jayewardenepura, Sri Lanka, pp. 25-26, Nov. 2007.
    • D.D.G.L. Dahanayaka, S.C. Jayamanne and M.J.S. Wijeyaratne, Polychaete Diversity in a Tropical Estuarine Ecosystem, 13th Annual Scientific Sessions, Sri Lanka Association for Fisheries and Aquatic Resources, pp. 8, Jun. 2007.
    • S.C.Jayamanne and D.D.G.L. Dahanayaka, Post tsunami recovery of fauna and flora of the Barberyn reef, Beruwala, Sri Lanka, Proc. of the 25th Anniversary Scientific Conference of NARA on Tropical Aquatic Research towards Sustainable Development, Colombo, Sri Lanka, pp. 34, Feb. 2007.
    • D.D.G.L. Dahanayaka, S.C. Jayamanne and M.J.S. Wijeyaratne, Assemblages of macro-invertebrates in the Negombo estuarine ecosystem in relation to the locations of drainage outlets, Proc. of Annual Research Symposium 2006, Faculty of Graduate Studies, University of Kelaniya, Sri Lanka, pp. 82, Dec. 2006.
    • Y.Y.K. De Silva and D.D.G.L. Dahanayaka, Performance and competitiveness – Fisheries export trade in Sri Lanka, 12th Annual Scientific Sessions, Sri Lanka Association for Fisheries and Aquatic Resources, pp. 38, Jul. 2006.
    • D.D.G.L.Dahanayakaand S.C. Jayamanne, Macrozoobenthic community structure in the channel segment, Negombo estuary, Western coast of Sri Lanka, International Conference on Humid Tropical Ecosystems: Changes, Challenges Opportunities, Kandy, Sri Lanka, pp. 22, Dec. 2006.
    • D.S. Jayakody, U. Liyanage and D.D.G.L. Dahanayaka, Growth observations through restocking of Penaeus monodon (Crustacea: Penaeidae) in Rekawa Lagoon, 12th Annual Scientific Sessions, Sri Lanka Association for Fisheries and Aquatic Resources, pp. 26, Jul. 2006.
    • D.D.G.L.Dahanayaka and M.J.S. Wijeyaratne, Spatial Variation in the Diversity of Macrobenthos in the Negombo Estuary, 10th Annual Scientific Sessions, Sri Lanka Association for Fisheries and Aquatic Resources, Colombo, Sri Lanka, pp. 17, Jul. 2004.
Name of the student Name of the higher Degree Date of Registration Place of Registration Title of the project Responsibility
Research Degrees – PhD/MPhil
Ms. H.A.A. Priyadarshani               PhD

 

 01/01/2020 University of Ruhuna Development of Captive Breeding Techniques   for selected Freshwater Endemic Fish Species   in Sri Lanka Co-supervisor
H.N.P.D Dahanayake PhD 30/12/2020 University of Colombo Land Use Land Cover change, drivers and its impacts on three protected areas in Sri Lanka: A GIS, Remote Sensing and modeling approach Co-supervisor
KPK Madushani MPhil

 

Completed

 01/08/2018 University of Kelaniya Reproductive biology and ecology of Typha angustifolia and development of management strategies to control its invasion in Man and Biosphere (MAB) wetland reserve at Bundala Co-supervisor
WK Suwandhahannadi MPhil 26/01/2022 University of Colombo Environmental profiling of Rekawa lagoon with a special reference to ecosystem services Co-supervisor
R.D.T. Rajapaksha MPhil 03/06/

2022

 University of Kelaniya Spatial and temporal variation of water quality, fish species and associate vegetation in the villu ecosystems in the Wilpattu National Park Co-supervisor
Masters          
WK Suwandhahannadi MSc

Completed in 2020

 2019

 

 OUSL Assessment of nutrients, pelagic respiration and primary productivity in the Malala lagoon, Hambanthota District Principal Supervisor
P.A.S.A. Rathnasiri

 

 

 

 

 

 MSc

Completed in 2020

 2019 OUSL Diversity and distribution of marine phytoplankton in the coastal waters of Crow Island Beach Park Principal Supervisor
S.A.S. Sujeewani MSc

Completed in 2020

 2019 OUSL Assessment of marine litter in selected Beaches of Southern and Western part of Sri Lanka Principal Supervisor
M.S.P. Wickramarachchi MSc

Completed in 2020

 2019 OUSL An assessment of present status of invasive aquatic plants in selected urban wetlands of Colombo district and determine possible control methods Principal Supervisor
K. Kamalendran

 

 

 

 MSc

Completed in 2021

 2018 University of Colombo A comprehensive study on the diversity and distribution of zooplnktonsin relation to the environmental parameters of Kala Oya basin in between Kudagama and Eluwankulama, Sri Lanka Co-supervisor
M.C.A. Galappaththi MSc

Completed in 2022

 2021 University of Peradeniya Die-back of Manilkara hexandra in Bundala national park:potential edaphic factors Co-supervisor
B.Thenuvathany

 

 

 MSc

Completed in 2022

 2021 OUSL Impact assesment of Marine Litter towards livelihood of coastal areas of Northern Province

 

 Principal Supervisor
H.K.U.S. Dikkumbura

 

 

 MSc 2021 OUSL RADAR Remote Sensing for effective flood mapping

 

 Principal Supervisor
B. Pavithan

 

 

 

 

 MSc

Completed in 2022

 2021 OUSL The environmental and social changes by tourism development in Vavunia Principal Supervisor
H.N. Ilanperuma MSc 2022 OUSL Monitoring of spatial and temporal distribution of Marine debris selected locations in southern coast. Principal Supervisor
M.W.N Fernando MSc 2022 OUSL Proposing guidelines for wetland conservation into urban planning process in Kaduwela MC area Principal Supervisor
K.G.N.D. KARIYAWASAM MSc 2022 OUSL Assessment on sustainable benefits of urban wetlands and its conservation through urban environment planning in Beddagana Wetland Park Principal Supervisor
BSc Hons          
H.A.T.A. Hangawatta BSc Honours in Zoology

Completed in 2019

 2018 OUSL Effects of Environmental Factors on Spatial and Temporal variations of fish species composition and diversity of Kala Oya river basin, Sri Lanka Principal Supervisor
Hansamali Abeysinghe BSc Honours in Environmental Science

Completed in 2020

 2019 University of Colombo Assessment of chlorophyll-a as an indication of trophic status in Koggala Co-supervisor
R.D.D.W.M.R.S. Alawattegama BSc Honours in Zoology

Completed in 2022

 2020 OUSL Coastal and marine spatial planning on western, north-western & northern regions of Sri Lanka Principal Supervisor
W.P.T.A. Perera BSc Honours in Environmental Science

Completed in 2022

 2021 University of Colombo Land use and land cover changes, urban expansion

and nighttime light intensity in selected areas of Hambantota district

 Co-supervisor
O.W. Kotagama BSc Honours in Botany

Completed in 2022

 2021 OUSL The Potential Impact of Sea Level Rise on Mangrove Communities and its Implications: A Case Study from the Chilaw Lagoon. Co-supervisor
BSc          
H.D.A.S.T. Samaranayake BSc degree

Completed in 2020

 2019 OUSL Present Status of Shrimp Farms in Marawila – Chilaw Stretch, North Western Province, Sri Lanka Principal Supervisor
J .S. Abeysinghe BSc degree

Completed in 2020

 2019 OUSL Development of Marine Mammal Stranding & Mortality Database using GIS as a Forensic Tool Principal Supervisor
Rochele Micheal BSc degree

Completed in 2021

 2020 OUSL Assessing the Impact of COVID-19 on Fisheries Production & Exports in Sri Lanka and forecasting future trends Principal Supervisor
PLN Lakmali BSc degree 2022 OUSL Oceanographic determinants of the occurrence of Whales

and Dolphins in Southern Sri Lanka

 Principal Supervisor

Senior Lecturer in Zoology

Department of Zoology
Faculty of Natural Sciences

The Open University of Sri Lanka

Nawala, Sri Lanka

 

Research Fellow

INTI International University,

Persiaran Perdana BBN,
Putra Nilai,
71800 Nilai, N. Sembilan,
Malaysia

  • Member of Technical Working Group on Digital Technology (TWG-Digital Technology) (2023), The Ministry of Fisheries, Sri Lanka & Food and Agriculture Organization (FAO)
  • Sector Expert (Fisheries and Coastal): Third National Communication of Climate Change in Sri Lanka (2022), Climate Change Secretariat
    Ministry of Environment Sri Lanka
  • National Freshwater Fish Expert Panel Member: The National Red List of Sri Lanka: Assessment of the Threat Status of the Freshwater Fishes of Sri Lanka 2020
  • National Coordinator –International Space Weather Initiative (ISWI) (http://www.iswi-secretariat.org/)
  • National Coordinator –World Space Week 
  • President – Sri Lanka Association for Fisheries and Aquatic Resources (SLAFAR) – Dec 2020 –Dec 2021
  • Joint Secretary – Sri Lanka Association for Fisheries and Aquatic Resources (SLAFAR) – May 2017 to June 2019
  • Vice President – Sri Lanka Association for Fisheries and Aquatic Resources (SLAFAR) – June 2019 to Dec 2020
  • Executive committee member –Sri Lanka Association for Fisheries and Aquatic Resources (SLAFAR) – Nov 2007 to Jun 2008
  • Member – Industry Advisory Board, University of Vocational Technology (UNIVOTEC)
  • Treasurer – Marine Environment Forum – May 2019 to Date
  • Young Scientist Travel Grant Award to Malaysia – National Science Foundation (NSF), Sri Lanka – 2008 (RGB/GEN/06/2008/02/12)
  • International Student Travel Grant – 5th International Student Conference at Ibaraki University, Japan – 2009.
  • Student Travel Grant for IGARSS 2012 Conference–Munich, Germany – IEEE Geoscience and Remote Sensing Society -2012
  • JASSO Fellowship for Foreign Researchers JASSO, Japan (2012-2013)
  • Post-Doctoral Research  Fellowship for Foreign Researchers, The Japan Society for the Promotion of Science (JSPS) April 2013 – March 2015
  • Research Award for the publications 2020,  2021 & 2022, The Open University of Sri Lanka
  • Member – Steering Committee on Marine Sector Conservation, Department of Wildlife Conservation (DWC), Sri Lanka – Jan 2017 to Date.
  • Member– National Invasive Species Specialized Group (NISSG) Sri Lanka (2015 to date)
  • Member – Institute of Environmental Professionals Sri Lanka (IEPSL) (2021 to date)
  • Member – Remote Sensing Society of Japan (RSSJ) (2010 to 2015)
  • Member – Japan Geoscience Union (JpGU) (2013 to 2015)
  • Member – Global Mangrove Database & Information System (GLOMIS), ISME, Japan
  • Member – Japan-Affiliated Research Community Network
  • Member – Commission on Ecosystem Management – IUCN (2011 to date)
  • Life member – Sri Lanka Association for Fisheries and Aquatic Resources (SLAFAR), Sri Lanka 
  • Life member – Sri Lanka Association for Advancement of Science, Sri Lanka (SLAAS)
  • Member – Young Scientist Forum (YSF), National Science & Technology Commission, Sri Lanka (NASTEC)
  • Full Member – Institute of Biology (IOB), Sri Lanka
  • Member – National Invasive Species Specialized Group (NISSG) Sri Lanka (2015 to date)
  • Full Member – Sri Lankan Academy of Young Scientists (SLAYS) – Aug 2017 to date.

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Faculty of Natural Sciences

The Faculty currently offers 29 programmes of study ranging from Certificate to Postgraduate level, as well as stand-alone courses and short courses. The main undergraduate programmes offered by the Faculty are BSc degree programme and BSc (Hons) degree programmes with nearly 5,000 students.

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