The Influence of Geomorphic Factors and Geographic Region on Large Woody Debris Loading and Fish Habitat in Alaska Coastal Streams
The Influence of Geomorphic Factors and Geographic Region on Large Woody Debris Loading and Fish Habitat in Alaska Coastal Streams
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地貌因素和地理区域对阿拉斯加沿岸溪流中大型木本碎片装载和鱼类栖息地的影响
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发表时间：
2001
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通讯作者：
Douglas J. Martin
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作者：
Douglas J. Martin
摘要分析了阿拉斯加三个沿海地区不同地貌通道类型的大型木质残体（LWD）和通道数据，以记录LWD丰度的区域变化，定义影响LWD丰度的地貌特征，并确定LWD丰度与溪流中的水池和砾石坝形成之间的关系。大型木质残体丰度显着较低的沿海针叶林的北方边缘比在阿拉斯加东南部，并显着更大的冲积砾石层渠道比在包含巨石基岩渠道。随钻测井在冲积河道中形成的储层和砂坝比在封闭河道中形成的多。池间距（池之间的通道宽度的数量）随钻测井丰度（件/公里）的增加而减少，并显着影响随钻测井丰度和通道宽度之间的相互作用。随着河道宽度的增加，随钻测井丰度的变化对油气藏间距的影响更大，但油气藏的相对变化与河道宽度有关。
Abstract Large woody debris (LWD) and channel data from three Alaska coastal regions with varying geomorphic channel types were analyzed to document regional variability in LWD abundance, define geomorphic characteristics affecting LWD abundance, and identify relationships between LWD abundance and the formation of pools and gravel bars in streams. Large woody debris abundance was significantly lower at the northern edge of the coastal coniferous forest than in Southeast Alaska and was significantly greater in alluvial gravel-bedded channels than in contained boulder–bedrock channels. More pools and gravel bars were formed by LWD in alluvial channels than in contained channels. Pool spacing (the number of channel widths between pools) decreased with increasing LWD abundance (pieces/km) and was significantly influenced by the interaction between LWD abundance and channel width. As channel width increased, pool spacing was more strongly influenced by changes in LWD abundance, but the relative change in pool...