Species Diversity and Distribution of Phytoplankton in Seagrass Beds in Tak-Bai Canal, Narathiwat Province
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Abstract
Seagrass beds are considered to be an important food source and shelter for a diverse community of aquatic animals, even after they have died and decomposed, serving as a source of nutrients for phytoplankton. Consequently, this process leads to the circulation of elements and nutrients returning to the ecosystem. Phytoplankton are the primary food source of zooplankton, which are primary consumers that transfer energy to the next consumer in the aquatic food chain. The Tak-Bai Canal plays a crucial role as a source of fisheries for the community, and it is one of the main seagrass bed areas in Narathiwat Province. Therefore, this study aims to investigate the species diversity of phytoplankton and some environmental factors affecting their species diversity and distribution in the seagrass beds of the Tak-Bai Canal. The qualitative samples were collected using a plankton net with mesh sizes of 20 µm at three stations over a total period of 13 months. A total of five divisions, 66 genera, and 97 species of phytoplankton were recorded. The species diversity was the highest in station 2 and during late rainy season (97 species). The dominant phytoplankton in this study were Protoperidinium sp., Oscillatoria spp., Ceratium furca, Pleurosigma spp., Closterium setaceum and Coscinodiscus spp. Phytoplankton species diversity was not significantly different among stations (P>0.05), whereas the species diversity showed a significant difference among seasons in station 3 (P<0.05). The species composition of phytoplankton is most similar between station 2 and station 3 (Ss=0.85) and between the summer and early rainy season (Ss=0.88). In addition, salinity and depth were the main environmental factors that showed high correlation with phytoplankton distribution (r=0.870, p=0.016).
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บทความ ข้อมูล เนื้อหา รูปภาพ ฯลฯ ที่ได้รับการเผยแพร่ในวารสารวิทยาศาสตร์และเทคโนโลยี มรย. นี้ ถือเป็นลิขสิทธิ์ของวารสารวิทยาศาสตร์และเทคโนโลยี มรย. หากบุคคลหรือหน่วยงานใดต้องการนำทั้งหมดหรือส่วนหนึ่งส่วนใดไปเผยแพร่ต่อหรือกระทำการใดๆ จะต้องได้รับอนุญาตเป็นลายลักษณ์อักษรจากวารสารวิทยาศาสตร์และเทคโนโลยี มรย. ก่อนเท่านั้น
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