Spatial variation of phytoplankton community structure in Daya Bay, China
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Daya Bay is one of the largest and most important gulfs in the southern coast of China, in the northern part of the South China Sea. The phylogenetic diversity and spatial distribution of phytoplankton from the Daya Bay surface water and the relationship with the in situ water environment were investigated by the clone library of the large subunit of ribulose-1, 5-bisphosphate carboxylase (rbcL) gene. The dominant species of phytoplankton were diatoms and eustigmatophytes, which accounted for 81.9 % of all the clones of the rbcL genes. Prymnesiophytes were widely spread and wide varieties lived in Daya Bay, whereas the quantity was limited. The community structure of phytoplankton was shaped by pH and salinity and the concentration of silicate, phosphorus and nitrite. The phytoplankton biomass was significantly positively affected by phosphorus and nitrite but negatively by salinity and pH. Therefore, the phytoplankton distribution and biomass from Daya Bay were doubly affected by anthropic activities and natural factors.
KeywordsPhytoplankton community Daya Bay Large subunit of ribulose-1, 5-bisphosphate carboxylase (rbcL) gene Redundancy analysis (RDA) Environmental variable
This research was supported by, the National Natural Science Foundation of China (Nos. 41430966 and 41176101), the key projects in the National Science & Technology Pillar Program in the Eleventh Five-year Plan Period (No. 2012BAC07B0402), the Knowledge Innovation Programs of the Chinese Academy of Sciences (No. KSCX2-SW-132) and State Key Laboratory of Tropical Oceanography (No. LTOZZ1402).
Conflict of interest
The authors declare that they have no conflict of interest.
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