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Title: | Update of seagrass cover and species diversity in Southern Viet Nam using remote sensing data and molecular analyses |
Authors: | Nguyen, Xuan Vy Lau, Va Khin Nguyen, Nhat Nhu Thuy Nguyen, Trung Hieu Phan, Kim Hoang Dao, Viet Ha Ho, Dinh Duan Hayashizakid, Ken-ichi Fortese, Miguel D. Papenbrock, Jutta |
Keywords: | Vietnam Phu Quoc island Seagrass bed Halophila Remote sensing |
Issue Date: | 2021 |
Series/Report no.: | Regional studies in marine science 2021 v.44 Find all articles in: Regional studies in marine science, Vol. 44, pp. 101803; http://doi.org/10.1016/j.rsma.2021.101803; |
Abstract: | Along with coral reefs and mangroves, seagrass meadows are being threatened globally Southeast Asia is considered within the area of seagrasses’ cradle of diversity. However, information on the current status of seagrass beds from Southern Viet Nam is limited due to lack of reliable data about seagrass species occurring in the Southeast Asian region. One factor is the difficulty of unambiguous species identification. For example, the leaf morphological characteristics of Halophila ovalis and closely related species are overlapping which leads to misidentifications. In this study, the latest satellite Landsat 8 OLI and SENTINEL-2B image analyses were applied to determine the distribution of seagrass beds in Southern Viet Nam. Detailed morphological and genetic marker analyses were used to determine and update the species composition. The present study together with literature reviews indicate that the total area of seagrass beds from Southern Viet Nam are 10,832.1 ha. 2,562 ha (or 19.1%) of seagrass coverage has been lost. The seagrass beds at Phu Quoc Island are the largest with 7,579 ha. The occurrence of Halophila major is updated for almost all off-shore islands and open-water areas. |
URI: | http://113.160.249.209:8080/xmlui/handle/123456789/20508 |
ISSN: | 2352-4855 |
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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