Relationships between trout habitat use and woody debris in two southern New England streams
Relationships between trout habitat use and woody debris in two southern New England streams
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新英格兰南部两条溪流中鳟鱼栖息地利用与木质残骸之间的关系
DOI：
10.1034/j.1600-0633.2002.00016.x
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发表时间：
2002
影响因子：
1.8
通讯作者：
T. Wildman
中科院分区：
文献类型：
--
作者：
R. M. Neumann;T. Wildman
在流栖息地进行了测量，鳟鱼密度估计在梅里克溪（105个栖息地单位）和坦克胡森河（135个栖息地单位），康涅狄格州，以确定栖息地之间的关系，溪鳟Salvelinus fontinalis和褐鳟鱼萨尔莫trutta和木质残体。在每个生境单元，木质残体库存，长度，宽度，深度，面积，宽深比和底切银行面积估计。鳟鱼丰度估计浮潜。多元回归被用来测试鳟鱼密度和描述栖息地单元变量的主成分之间的关系。在梅里克布鲁克，栖息地单位的大小和形状解释了大部分的栖息地单位之间的溪鳟（<130和130毫米）和褐鳟（<150毫米）的密度变化，虽然主要成分描述大的木质残体或细木质残体显着的溪鳟（130毫米）和褐鳟（<150和150毫米）的密度变化。在Tankerhoosen河，细木质残体解释了溪鳟密度的大部分变化（<130和-130毫米），其次是栖息地单位的大小和形状。大的木质残体和细的木质残体都对褐鳟鱼（150毫米）密度的变化有显著的影响。这些结果表明，木质残体是野生鳟鱼栖息地的重要组成部分，高于栖息地单元形状和大小单独提供的组成部分。
In-stream habitat was measured and trout density was estimated in Merrick Brook (105 habitat units) and the Tankerhoosen River (135 habitat units), Connecticut to determine relationships between habitat use of brook trout Salvelinus fontinalis and brown trout Salmo trutta and woody debris. In each habitat unit, woody debris was inventoried, and length, width, depth, area, width : depth ratio and undercut bank area were estimated. Trout abundance was estimated by snorkeling. Multiple regression was used to test relationships between trout density and principal components describing habitat unit variables. In Merrick Brook, habitat unit size and shape explained most of the variability in density of brook trout (<130 and � 130 mm) and brown trout (<150 mm) among habitat units, although principle components describing large woody debris or fine woody debris contributed significantly to variations in density of brook trout (� 130 mm) and brown trout (<150 and � 150 mm). In the Tankerhoosen River, fine woody debris explained most of the variability in density of brook trout (<130 and � 130 mm), followed by habitat unit size and shape. Both large woody debris and fine woody debris contributed significantly to variations in density of brown trout (� 150 mm). These results suggest that woody debris is an important component of wild trout habitat above that provided by habitat unit shape and size alone.