Large Woody Debris and Salmonid Habitat in a Small Coastal British Columbia Stream
Large Woody Debris and Salmonid Habitat in a Small Coastal British Columbia Stream
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不列颠哥伦比亚省沿海小溪中的大型木质碎片和鲑鱼栖息地
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
T. Northcote
中科院分区：
文献类型：
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作者：
K. Fausch;T. Northcote
一个小的沿海不列颠哥伦比亚省流，以前被清理的大木质残体（LWD）的部分进行了比较，其中大部分碎片被留下，并与其他碎片已相对不受干扰至少40年。 三个部分的碎片已被删除有简单的栖息地，是不那么曲折，更广泛，更浅，并有更少的游泳池体积和头顶覆盖比四个部分更复杂的栖息地的碎片被保留。四个相对未受干扰的部分栖息地一般类似于复杂的部分。所有断面的大部分水池都是由随钻测井或垂直于水流方向或向下游倾斜的大型树根形成的冲刷或水垫塘。1岁以上和年龄较大的银鲑（Oncorhynchus kisutch）和割喉鳟鱼（O. clarki）在复杂切片中显著大于简单切片（P<0.02）。 1岁以上和年龄较大的鲑鱼生物量与部分池体积密切相关（r2 = 0.92，.
Sections of a small coastal British Columbia stream that had previously been cleaned of large woody debris (LWD) were compared with sections where most debris was left and with others where debris had been relatively undisturbed for at least 40 yr. Three sections where debris had been removed had simple habitat that was less sinuous, wider, and shallower and had less pool volume and overhead cover than four sections with more complex habitat where debris was retained. Habitat in four relatively undisturbed sections was generally similar to complex sections. Most pools in all sections were scour or plunge pools formed by LWD or large roots oriented perpendicular to the flow or angled downstream. Standing crop (kolograms per hectare) and individual weights of age 1 + and older coho salmon (Oncorhynchus kisutch) and cutthroat trout (O. clarki) were significantly greater (P < 0.02) in complex than in simple sections. Biomass of age 1 + and older salmonids was closely related to section pool volume (r2 = 0.92,...