Aquatic food web response to patchy shading along forested headwater streams
Aquatic food web response to patchy shading along forested headwater streams
复制标题
水生食物网对森林源头溪流斑驳阴影的响应
DOI：
10.1139/cjfas-2017-0464
复制
发表时间：
2018
影响因子：
2.4
通讯作者：
D. Warren
中科院分区：
文献类型：
--
作者：
Emily D. Heaston;Matthew J. Kaylor;D. Warren
在森林覆盖的溪流中，河岸植被的年龄和结构的变化已被证明会直接影响到达溪流底栖生物的光量。人们普遍了解光直接影响森林溪流初级生产力的潜力，但大多数探索河段规模的河内光动态的实地实验都评估了河岸植被的巨大变化。很少有研究量化辐照度较小变化的影响，特别是复杂河岸森林中形成的斑驳的河内光如何影响河流生物群。我们应用了阴影斑块，覆盖了三个操纵范围的约 50%，每个操纵范围都与未操纵的参考范围配对。我们使用前后控制影响研究设计量化了溪流光可用性、底栖附生生物、水生大型无脊椎动物、鱼类和蝾螈生物量的变化。相对于参考河段，斑驳的阴影减少了局部和河段尺度的光照，并减少了操作地点的附生生物、大型无脊椎动物、鱼类和蝾螈的生物量。结果表明，溪流光线的适度变化，例如通过林分发育和小规模干扰过程发生的变化，可以通过自下而上的过程影响溪流生物群。
In forested streams, changes in age and structure of riparian vegetation have been shown to directly influence the amount of light reaching the stream benthos. The potential for light to directly impact primary productivity in forested streams is generally understood, but most field experiments exploring reach-scale in-stream light dynamics have evaluated large changes in riparian vegetation. Fewer studies have quantified influences of smaller changes in irradiance, particularly how patchy in-stream light developed with complex riparian forests affects stream biota. We applied patches of shade, covering ∼50% of three manipulation reaches, which were each paired with an unmanipulated reference reach. We quantified changes in stream light availability, benthic periphyton, and aquatic macroinvertebrate, fish, and salamander biomass using a before–after control–impact study design. Patchy shading decreased localized and reach-scale light and reduced periphyton, macroinvertebrate, fish, and salamander biomass in manipulation sites relative to the reference reaches. Results suggest that moderate changes in stream light, such as those that occur through stand development and small-scale disturbance processes, can impact stream biota through bottom-up processes.
森林溪流生态系统中光产量的空间变异对光和养分初级生产的限制
影响因子：
3.7
作者：
Warren, Dana R.;Collins, Sarah M.;Purvis, Emily M.;Kaylor, Matthew J.;Bechtold, Heather A.
通讯作者：
Bechtold, Heather A.
河岸森林采伐对太平洋西北地区（美国）溪流光的长期影响
影响因子：
1.8
作者：
Kaylor, Matthew J.;Warren, Dana R.;Kiffney, Peter M.
通讯作者：
Kiffney, Peter M.