Update of seagrass cover and species diversity in Southern Viet Nam using remote sensing data and molecular analyses

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Xuan Vy Nguyen
  • Va Khin Lau
  • Nhu Thuy Nguyen-Nhat
  • Trung H. Nguyen
  • Kim Hoang Phan
  • Viet Ha Dao
  • Duan Ho-Dinh
  • Ken ichi Hayashizaki
  • Miguel D. Fortes
  • Jutta Papenbrock

Research Organisations

External Research Organisations

  • Kitasato University
  • University of the Philippines
  • Vietnamese Academy of Science and Technology
  • HCMC University of Technology and Education
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Details

Original languageEnglish
Article number101803
JournalRegional Studies in Marine Science
Volume44
Early online date24 Apr 2021
Publication statusPublished - May 2021

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. 2562 ha (or 19.1%) of seagrass coverage has been lost. The seagrass beds at Phu Quoc Island are the largest with 7579 ha. The occurrence of Halophila major is updated for almost all off-shore islands and open-water areas.

Keywords

    Satellite data, Seagrass, Southern Viet Nam, Species distribution

ASJC Scopus subject areas

Cite this

Update of seagrass cover and species diversity in Southern Viet Nam using remote sensing data and molecular analyses. / Nguyen, Xuan Vy; Lau, Va Khin; Nguyen-Nhat, Nhu Thuy et al.
In: Regional Studies in Marine Science, Vol. 44, 101803, 05.2021.

Research output: Contribution to journalArticleResearchpeer review

Nguyen, XV, Lau, VK, Nguyen-Nhat, NT, Nguyen, TH, Phan, KH, Dao, VH, Ho-Dinh, D, Hayashizaki, KI, Fortes, MD & Papenbrock, J 2021, 'Update of seagrass cover and species diversity in Southern Viet Nam using remote sensing data and molecular analyses', Regional Studies in Marine Science, vol. 44, 101803. https://doi.org/10.1016/j.rsma.2021.101803
Nguyen, X. V., Lau, V. K., Nguyen-Nhat, N. T., Nguyen, T. H., Phan, K. H., Dao, V. H., Ho-Dinh, D., Hayashizaki, K. I., Fortes, M. D., & Papenbrock, J. (2021). Update of seagrass cover and species diversity in Southern Viet Nam using remote sensing data and molecular analyses. Regional Studies in Marine Science, 44, Article 101803. https://doi.org/10.1016/j.rsma.2021.101803
Nguyen XV, Lau VK, Nguyen-Nhat NT, Nguyen TH, Phan KH, Dao VH et al. Update of seagrass cover and species diversity in Southern Viet Nam using remote sensing data and molecular analyses. Regional Studies in Marine Science. 2021 May;44:101803. Epub 2021 Apr 24. doi: 10.1016/j.rsma.2021.101803
Nguyen, Xuan Vy ; Lau, Va Khin ; Nguyen-Nhat, Nhu Thuy et al. / Update of seagrass cover and species diversity in Southern Viet Nam using remote sensing data and molecular analyses. In: Regional Studies in Marine Science. 2021 ; Vol. 44.
Download
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title = "Update of seagrass cover and species diversity in Southern Viet Nam using remote sensing data and molecular analyses",
abstract = "Along with coral reefs and mangroves, seagrass meadows are being threatened globally Southeast Asia is considered within the area of seagrasses{\textquoteright} 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. 2562 ha (or 19.1%) of seagrass coverage has been lost. The seagrass beds at Phu Quoc Island are the largest with 7579 ha. The occurrence of Halophila major is updated for almost all off-shore islands and open-water areas.",
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AU - Nguyen, Xuan Vy

AU - Lau, Va Khin

AU - Nguyen-Nhat, Nhu Thuy

AU - Nguyen, Trung H.

AU - Phan, Kim Hoang

AU - Dao, Viet Ha

AU - Ho-Dinh, Duan

AU - Hayashizaki, Ken ichi

AU - Fortes, Miguel D.

AU - Papenbrock, Jutta

N1 - Funding Information: We are deeply indebted to all staff of the Department of Marine Botany, Center for Oceanographic Data, GIS and Remote Sensing, Institute of Oceanography (ION), Viet Nam, for their support, generously providing many valuable suggestions. We thank the VAST Key lab on Food and Environmental Safety (Central Viet Nam) for the ability to use their equipment. We would like to thank the three anonymous reviewers for their suggestions, comments, and editing. We also thank to JSPS Core-to-Core Program CREPSUM.JPJSCCB20200009. This work was supported by Vietnam Academy of Science and Technology, grant code VAST04.01/20-21.

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