|
 |
SCI论文目录 |
Macrozoobenthos in 2 shallow, mesotrophic Chinese lakes with
contrasting sources of primary production
|
| ------------------------------------------------------------------------------------------ |
出 版 社：Journal of the North American Benthological Society [J. N. Am.
Benthol. Soc.].
|
| 发表时间：2000 |
| 台 站：
东湖湖泊生态系统试验站
|
| 作 者：Gong, Zhijun; Xie, Ping; Wang, Shida |
| 点 击 率：2767 |
| ------------------------------------------------------------------------------------------ |
| 关 键 字：null |
| 摘 要：null |
| 关 键 字(英文)：null |
摘 要(英文)：Comparative studies on macrozoobenthos were done in 2 shallow
mesotrophic lakes in the middle basins of the Yangtze River,
China: Lake Biandantang where macrophytes were abundant, and Lake
Houhu where macrophytes were scarce. Samples were taken monthly at
4 stations in each lake from April 1997 to March 1999, and a total
of 67 and 31 taxa of macrozoobenthos were recorded in Lake
Biandantang and Lake Houhu, respectively. Both annual mean density
and biomass of macrozoobenthos were higher in Lake Biandantang
than in Lake Houhu: 780 vs 532 indivials/m super(2) and 37.1 vs
25.9 g wet mass/m super(2), respectively. Abundance of functional
feeding groups followed the order: scraper > collector > predator
> shredder in Lake Biandantang, and collector > predator > scraper
> shredder in Lake Houhu. Only 1 density peak occurred from winter
to early spring in Lake Houhu; however, in Lake Biandantang, there
were 2 peaks, the winter peak and spring peak. K-dominance curves
and Shannon-Wiener, Simpson, and Margelef indices indicated that
macrozoobenthos were more diverse in Lake Biandantang than in Lake
Houhu. Our study suggests that, in shallow lakes, submerged
macrophytes are essential for the maintenance of biodiversity of
macrozoobenthos mainly because the macrophytes increase habit
heterogeneity and availability of suitable food, and may also
decrease predation by fish on the macrozoobenthos.
|
| ------------------------------------------------------------------------------------------ |
| null |
|
|
|
