Multi-year succession of cyanobacteria blooms in a highland reservoir with changing nutrient status, Guizhou Province, China
| Autor: | Paul B. Hamilton, Anzhi Dang, Xian Dong, Ondhoro C. Chobet, Jianrong Ma, Zhi Wei Liu, Chuan Chen, Jiangan Chen, Yang Yang, Long Shengxing |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Cyanobacteria
Microcystis 010504 meteorology & atmospheric sciences nitrogen and phosphorus Ecological succession 010501 environmental sciences Aquatic Science Aphanizomenon 01 natural sciences cyanobacteria blooms Nutrient Algae Phytoplankton Pseudanabaena lcsh:Physical geography lcsh:Environmental sciences 0105 earth and related environmental sciences Water Science and Technology Trophic level lcsh:GE1-350 Ecology biology lcsh:Geography. Anthropology. Recreation biology.organism_classification lcsh:G competitive succession lcsh:GB3-5030 |
| Zdroj: | Journal of Limnology, Vol 77, Iss 2 (2018) |
| ISSN: | 1723-8633 1129-5767 1994-2001 |
| Popis: | Over the last 22 years significant phytoplankton changes in Hongfeng lake reservoir have been observed with multiple years of harmful cyanobacteria blooms (cHABs). Fish farming and other anthropogenic activities from 1994-2001 triggered the harmful blooms. Nine years after the cessation of aquaculture, a conversion from problematic species (Microcystis spp, Aphanizomenon flos-aquae) to the less problematic species P. limnetica and other associated non-cyanobacteria taxa was recorded. Through this period of change, trophic factors (bottom-up) were re-examined, and correlations between cHABs and selected environmental variables were observed. Higher temperatures, nutrients (TN, TP) and available light significantly favored the development of Microcystis spp blooms. With declining nutrient loads, and a decline in TP relative to TN there was a competitive shift from Microcystis summer blooms to the growth of Pseudanabaena limnetica and other non-cyanobacteria. Pseudanabaena limnetica was favored over Microcystis spp when temperatures were |
| Databáze: | OpenAIRE |
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