Canonical correspondence analysis of phytoplankton community and environmental factors in Qinhuai River in autumn and winter
The phytoplankton community in the internal and external Qinhuai River in Nanjing City was investigated and analyzed in October 2012 and January 2013 . A total of 37 species of phytoplankton belonging to four families and 30 genera were identified. Blue-green algae-diatoms were dominant phytoplankton in the autumn, with an average abundance and biomass of 221.5í104 cells/L and 4.41 mg/L, respectively. Diatoms were dominant phytoplankton in the winter, with an average abundance and biomass of 153.4í104 cells/L and 6.58 mg/L, respectively. Canonical correspondence analysis ( CCA) showed that green algae had a high tolerance to water that had high nitrogen and phosphorus nutrient concentrations and permanganate indices, and diatoms had a strong ability to adapt to a changeable environment; the ratio of nitrogen to phosphorus had a significant impact on the distributions of cyanobacteria, euglena, and part of the green algae; and water temperature and dissolved oxygen were the main environmental factors influencing the distribution of the phytoplankton community in the Qinhuai River in the autumn and winter, followed by nitrogen and phosphorus nutrient concentrations and electrical conductivity.
phytoplankton communityenvironmental factorscanonical correspondence analysisQinhuai River
NETL
NSTL
万方数据
维普
