期刊
ENVIRONMENTAL TECHNOLOGY
卷 37, 期 6, 页码 641-651出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09593330.2015.1076056
关键词
recruitment; Eutrophication; Microcystis; Oscillatoria; quantitative PCR; sediment
资金
- National Natural Science Foundation, China [41101060]
- Natural Science Foundation of Fujian Province, China [2014J01154]
- Special Foundation of Non-profit Research Institutes of Fujian Province [2011R1004-2]
- Natural Environment Research Council [ceh010010] Funding Source: researchfish
This study investigated the impact of four environmental factors on the recruitment of cyanobacteria from bottom sediments in the eutrophic Shanzi Reservoir. Temperature and light were identified as the key determinants for the recruitment of Microcystis and Oscillatoria. Cyanobacteria became dominant at higher temperature (20 degrees C) and light intensity (2000 lx) and Microcystis and Oscillatoria were the major species. Detailed recruitment simulation undertaken with the respective gradients of temperature and light suggested that both Microcystis and Oscillatoria are temperature sensitive and that their critical temperature point was 10 degrees C. However, distinct light impacts were observed only on Microcystis. The recruitment of Oscillatoria was light independent, whereas Microcystis had a positive relationship with light intensity. Physical disturbance promoted Microcystis recruitment and also affected the structure of the recruited cyanobacterial community at the water-sediment interface, based on quantitative polymerase chain reaction (qPCR) and phylogenetic analysis.
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