期刊
INTERNATIONAL REVIEW OF HYDROBIOLOGY
卷 93, 期 6, 页码 659-678出版社
WILEY
DOI: 10.1002/iroh.200711027
关键词
shallow lakes; indirect connection; direct connection; high connectivity; low connectivity
Zooplankton in two river-lake systems of the Parana River (Argentina) floodplain were studied during ordinary hydrological situations as well as during an extreme flood (El Nino event) over a period of more than 20 years. The studied lakes were selected because of their position at opposite ends of a surface connectivity gradient. Los Matadores Lake, with high connectivity, has a direct connection to the river via a short channel that is active during a large part of the year. At the other extreme, the low connectivity El Tigre Lake has an indirect connection to the river through a swampy area that is only active for short periods. During ordinary hydrologic periods, zooplankton abundance and species richness appear to be controlled by the degree of connectivity of the lakes. Abundance was higher in El Tigre, which is isolated for longer periods and consequently has a longer water-residence time. Contrary to expectations, species richness was also higher in this lake, a result that was surprising because water bodies with low conectivity/disturbance are predicted to have a lower biodiversity. This unexpected outcome reflects the nature of the connecting route, which crosses a long and complex swampy ecotone.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据