Influence of the Hyporheic Zone on Supersaturated Gas Exposure to Incubating Chum Salmon
Influence of the Hyporheic Zone on Supersaturated Gas Exposure to Incubating Chum Salmon
复制标题
DOI：
10.1577/m08-212.1
复制
发表时间：
2009-12
影响因子：
1.1
通讯作者：
E. Arntzen;D. Geist;Katherine J. Murray;J. Vavřinec;Earl M. Dawley;Dennis E. Schwartz
中科院分区：
文献类型：
--
作者：
E. Arntzen;D. Geist;Katherine J. Murray;J. Vavřinec;Earl M. Dawley;Dennis E. Schwartz
摘要水电站大坝运行导致哥伦比亚河下游地表水浓度接近120%，总溶解气（TDG）季节性升高。如果潜沉区内的深度补偿TDG浓度超过103%，则在附近产卵区孵化的联邦保护鲑鱼胚胎可能受到影响。本研究的目的是确定两个大马哈鱼产卵区——一个在华盛顿艾夫斯岛附近的侧河道，另一个在俄勒冈州摩特诺玛瀑布附近的哥伦比亚河干流——的潜流区TDG是否受到地表水TDG升高的影响。在Multnomah瀑布遗址，深度补偿的隐性TDG不超过103%。然而，在艾夫斯岛地区，鲑鱼redds暴露于超过103%的TDG超过300小时。随着河流深度的波动，艾夫斯岛地区的TDG变化显著，表明在…
Abstract Hydroelectric dam operation causes total dissolved gas (TDG) to be seasonally elevated in the lower Columbia River, as surface water concentrations approach 120%. Federally protected chum salmon Oncorhynchus keta embryos incubating in nearby spawning areas could be affected if depth-compensated TDG concentrations within the hyporheic zone exceed 103%. The objective of this study was to determine whether TDG of the hyporheic zone in two chum salmon spawning areas—one in a side channel near Ives Island, Washington, and another on the main-stem Columbia River near Multnomah Falls, Oregon—was affected by the elevated TDG of the surface water. Depth-compensated hyporheic TDG did not exceed 103% at the Multnomah Falls site. However, in the Ives Island area, chum salmon redds were exposed to TDG greater than 103% for more than 300 h. In response to river depth fluctuations, TDG varied significantly in the Ives Island area, suggesting increased interaction between the hyporheic zone and surface water at ...