Spatial Variation in Fish Species Richness of the Upper Mississippi River System
Spatial Variation in Fish Species Richness of the Upper Mississippi River System
复制标题
DOI：
10.1577/t03-089.1
复制
发表时间：
2004-07
影响因子：
1.4
通讯作者：
T. Koel
中科院分区：
文献类型：
--
作者：
T. Koel
摘要在密西西比河上游水系的许多河段，重要的自然环境梯度，包括河道外水生生物栖息地与主干河的连通性，已经丧失，而对这种隔离的后果的理解，在本地鱼类群落方面是缺乏的。本研究的目的是描述鱼类物种丰富度，均匀度和多样性之间的代表性栖息地和河流河段的模式，并检查鱼类物种丰富度和栖息地多样性之间的关系。每年（1994-1999年）的主要通道边界（MCB），侧通道边界（SCB），和连续回水海岸线（BWS）的鱼类群落进行了采样，使用船装电捕鱼，微型fyke网，fyke网，箍网，和围网在一个标准化的网站数量。总共收集了65万条鱼，代表了来自密西西比河上游的106种，包括4号、8号、13号和26号;开放（未蓄水）河段;以及伊利诺斯州的拉格兰奇河段。
Abstract Important natural environmental gradients, including the connectivity of off-channel aquatic habitats to the main-stem river, have been lost in many reaches of the upper Mississippi River system, and an understanding of the consequences of this isolation is lacking in regard to native fish communities. The objectives of this study were to describe patterns of fish species richness, evenness, and diversity among representative habitats and river reaches and to examine the relationship between fish species richness and habitat diversity. Each year (1994–1999) fish communities of main-channel borders (MCB), side channel borders (SCB), and contiguous backwater shorelines (BWS) were sampled using boat-mounted electrofishing, mini-fyke-nets, fyke nets, hoop nets, and seines at a standardized number of sites. A total of 0.65 million fish were collected, representing 106 species from upper Mississippi River Pools 4, 8, 13, and 26; the open (unimpounded) river reach; and the La Grange Reach of the Illinoi...