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Marine floral biodiversity, threats, and conservation in Vietnam: an updated review
Nguyen, M.L.; Kim, M.S.; Nguyen, N.T.N.; Nguyen, X.T.; Cao, V.L.; Nguyen, X.V.; Vieira, C. (2023). Marine floral biodiversity, threats, and conservation in Vietnam: an updated review. Plants-Basel 12(9): 1862. https://dx.doi.org/10.3390/plants12091862
In: Plants-Basel. MDPI AG: Basel. e-ISSN 2223-7747, more
Peer reviewed article  

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Keywords
    Seagrass
    Seaweed
    Algae; Chlorophyta [WoRMS]; Cyanobacteria [WoRMS]; Ochrophyta [WoRMS]; Rhodophyta [WoRMS]
    Marine/Coastal
Author keywords
    algae; Cyanobacteria; Rhodophyta; Ochrophyta; Chlorophyta; conservation; East Vietnam Sea; Bien Dong; molecular-assisted alpha taxonomy; seagrass; seaweed; South China Sea

Authors  Top 
  • Nguyen, M.L.
  • Kim, M.S.
  • Nguyen, N.T.N.
  • Nguyen, X.T.
  • Cao, V.L.
  • Nguyen, X.V.
  • Vieira, C., more

Abstract

    Part of the Indo-Chinese peninsula and located on the northwest edge of the Coral Triangle in the South China Sea, the Vietnamese coastal zone is home to a wealthy marine biodiversity associated with the regional geological setting and history, which supports a large number of marine ecosystems along a subtropical to tropical gradient. The diversity of coastal benthic marine primary producers is also a key biological factor supporting marine biological diversity. The present review provides: (1) an updated checklist of the Vietnamese marine flora, (2) a review of molecular-assisted alpha taxonomic efforts, (3) an analysis of marine floral biodiversity spatial distribution nationally and regionally (South China Sea), (4) a review of the impact of anthropogenic and environmental stressors on the Vietnamese marine flora, and (5) the efforts developed in the last decade for its conservation. Based on the studies conducted since 2013 and the nomenclatural changes that occurred during this period, an updated checklist of benthic marine algae and seagrasses consisted in a new total of 878 species, including 439 Rhodophyta, 156 Ochrophyta, 196 Chlorophyta, 87 Cyanobacteria, and 15 phanerogam seagrasses. This update contains 54 new records and 5 new species of macroalgae. The fairly poor number of new records and new species identified in the last 10 years in a “mega-diverse” country can be largely attributed to the limited efforts in exploring algal biodiversity and the limited use of genetic tools, with only 25.4% (15 species) of these new records and species made based on molecular-assisted alpha taxonomy. The South Central Coast supports the highest species diversity of marine algae, which coincides with the largest density of coral reefs along the Vietnamese coast. Vietnam holds in the South China Sea one of the richest marine floras, imputable to the country’s geographical, geological, and climatic settings. However, Vietnam marine floral biodiversity is under critical threats examined here, and current efforts are insufficient for its conservation. A methodical molecular-assisted re-examination of Vietnam marine floral biodiversity is urgently needed, complemented with in-depth investigations of the main threats targeting marine flora and vulnerable taxa, and finally, conservation measures should be urgently implemented.


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