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Please use this identifier to cite or link to this item: http://tvhdh.vnio.org.vn:8080/xmlui/handle/123456789/20263

Title: Satellite image analysis reveals changes in seagrass beds at Van Phong Bay, Vietnam during the last 30 years
Authors: Vo, Trong Thach
Lau, Va Khin
Liao, Lawrence M.
Nguyen, Xuan Vy
Keywords: Vietnam
Khanh Hoa
Van phong bay
seagrass bed
Issue Date: 2020
Series/Report no.: Aquatic Living Resources, volume 33(4): pp1-10, 2020;https://doi.org/10.1051/alr/2020005;
Abstract: Seagrass meadows are fragile ecosystems in the coastal zone. Natural disasters, land reclamation and various human activities seem to exert negative impacts on the distribution and biological performance of seagrass beds in Vietnam. In this present study, satellite Landsat TM/OLI image analysis was applied to determine changes in seagrass distribution at Van Phong Bay, Vietnam in the last 30 years. The maximum likelihood decision rule was used to extract seagrass bed distribution data. The error matrix using the in situ reference data for HLM image classification was 81–95% accurate, and Kappa coefficients were between 0.72 and 0.91. The results indicated that 186.2 ha (or 35.8%) of the original seagrass beds were lost in the last three decades at Van Phong Bay, and decline in each specific site may have been due to different causes. Typhoons may have caused the loss of seagrass beds at open-sea sites whereas aquaculture activities, excavation and terrigenous obliteration may have caused such losses in protected sites.
URI: http://113.160.249.209:8080/xmlui/handle/123456789/20263
ISSN: 1765-2952
Appears in Collections:Công bố khoa học ở tạp chí quốc tế - International research papers (Bibliographic record and/or full-text)

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