...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Freshwater Ecology >Response of a fish assemblage to severe flooding in Gilmore Creek, a southeastern Minnesota trout stream
【24h】

Response of a fish assemblage to severe flooding in Gilmore Creek, a southeastern Minnesota trout stream

机译：鱼群对明尼苏达州东南鳟鱼溪流吉尔莫尔克里克严重洪灾的响应

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Flooding in streams may result in the removal of fish or reduction in standing stocks. However, floods may also permit colonization by fish from sources downstream. Two extreme floods occurred over a 10-year period in Gilmore Creek, a trout stream in southeastern Minnesota. Both events were followed by temporary increases in fish species richness resulting from rapid incursions in 2004 by green sunfish (Lepomis cyanellus) and in 2007 by green sunfish and pumpkinseeds (Lepomis gibbosus), which probably moved at least 1.5 km from a lentic area downstream. After each flood event, sunfish declined by the following spring. Changes in the Gilmore Creek fish fauna were reflected in assessments of ecological health returned by one index of biotic integrity (IBI), with ratings declining from 'good' to 'poor' after each flood. Another IBI was less sensitive to the temporary increases in sunfish, although scores returned by the two IBI procedures were positively correlated.
机译：溪流泛滥可能导致鱼类被捕捞或种群减少。但是，洪水还可能导致鱼类从下游来源定居。在明尼苏达州东南部的一条鳟鱼流吉尔莫尔克里克（Gilmore Creek）的十年中发生了两次极端洪水。在这两个事件之后，由于2004年绿色翻车鱼（Lepomis cyanellus）和2007年绿色翻车鱼和南瓜子（Lepomis gibbosus）的迅速入侵而导致鱼类物种丰富度的暂时增加，这可能从下游的透镜体区域移动了至少1.5公里。每次洪水事件发生后，翻车鱼在次年春天下降。吉尔莫尔克里克（Gilmore Creek）鱼群的变化反映在一项生物完整性指数（IBI）所返回的生态健康评估中，每次洪水后等级从“好”降为“差”。另一个IBI对翻车鱼的临时增加不那么敏感，尽管这两个IBI程序返回的分数呈正相关。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号