|
|||||
|
|
Response of the cladoceran community to eutrophication, fish introductions and degradation of the macrophyte vegetation in Lake Dianchi, a large, shallow plateau lake in southwestern China |
|
| Authors: | Guimin Liu Zhengwen Liu Feizhou Chen Zhuo Zhang Binhe Gu Joseph M Smoak |
| Institution: | 1. School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, China 2. Engineering Research Center for Cold and Arid Regions Water Resource Comprehensive Utilization, Ministry of Education, Anning West Road 88, Lanzhou, 730070, China 3. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Science, 73 East Beijing Road, Nanjing, 210008, China 4. Department of Ecology, Institute of Hydrobiology, Jinan University, Guangzhou, 510630, China 5. Asian International Rivers Center (Key Lab), Yunnan University, North Green Lake Road 2, Kunming, 650091, China 6. Soil and Water Science Department, University of Florida, Gainesville, FL, USA 7. Department of Environmental Science, Policy, and Geography, University of South Florida, 140 7th Avenue South, Davis Hall 258, St. Petersburg, FL, 33701, USA |
| Abstract: | A paleolimnological evaluation was made in order to analyze the effects of increasing nutrient load, macrophyte degradation and fish introductions on the cladoceran community of a large, shallow plateau lake in southwestern China. The trophic state of Lake Dianchi has increased rapidly during recent decades, its macrophyte vegetation has suffered severe degradation, and fish introductions in the late 1950s and early 1980s have had a marked effect on the structure of the fish community. Our results show an increase in abundance of cladoceran species with a preference for eutrophic conditions over the last few decades, while species preferring oligotrophic conditions have decreased or disappeared. These changes correspond to the eutrophication in Lake Dianchi. The loss of the cladocerans Kurzia latissima and Disparalona rostrata is likely to be a reflection of the degradation of the macrophyte community. An increase in Daphnia body size indicated by the ephippia length since the early 1990s is associated with the decline of planktivorous species. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |