期刊
WATER
卷 13, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/w13091209
关键词
South China Sea; upwelling; eddy; diatom; Trichodesmium; Rhizosolenia– Richelia
资金
- National Key Research and Development Project of China [2019YFC1407805]
- National Natural Science Foundation of China [41876134, 41676112, 41276124, 41406155]
- Key Project of Key Laboratory of Integrated Marine Monitoring and Applied Technologies for Harmful Algal Blooms [MATHAB201805]
- Tianjin 131 Innovation Team Program [20180314]
- Changjiang Scholar Program of Chinese Ministry of Education [T2014253]
The study found that the phytoplankton community structure in the western South China Sea exhibits distinct variations between winter and summer, shifting from a diatom-dominated regime in winter to a cyanobacteria-dominated system in summer. This shift may be influenced by the oceanographic settings in the region.
Phytoplankton are known as important harbingers of climate change in aquatic ecosystems. Here, the influence of the oceanographic settings on the phytoplankton community structure in the western South China Sea (SCS) was investigated during two seasons, i.e., the winter (December 2006) and summer (August-September, 2007). The phytoplankton community was mainly composed of diatoms (192 taxa), dinoflagellates (109 taxa), and cyanobacteria (4 taxa). The chain-forming diatoms and cyanobacteria Trichodesmium were the dominants throughout the study period. The phytoplankton community structure displayed distinct variation between two seasons, shifting from a diatom-dominated regime in winter to a cyanobacteria-dominated system in summer. The increased abundance of overall phytoplankton and cyanobacteria in the water column during the summer signifies the impact of nutrient advection due to upwelling and enriched eddy activity. That the symbiotic cyanobacteria-diatom (Rhizosolenia-Richelia) association was abundant during the winter signifies the influence of cool temperature. On the contrary, Trichodesmium dominance during the summer implies its tolerance to increased temperature. Overall, the two seasonal variations within the local phytoplankton community in the western SCS could simulate their community shift over the forthcoming climatic conditions.
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