相关实验视频
Updated: Jul 5, 2025

12:44
Watershed Planning within a Quantitative Scenario Analysis Framework
Published on: July 24, 2016
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宏观控制决定了洪水干扰后河流生态系统生产率的恢复
Heili E Lowman1, Robert K Shriver1, Robert O Hall2
1Department of Natural Resources and Environmental Science, University of Nevada Reno, Reno, NV 89557.
概括
河流生态系统从高流量恢复取决于河流宽度和流量调节. 较宽的河流,流量不那么规范的河流更快地恢复,突出了对河流生产力的宏观控制.
科学领域:
- 生态生态学 生态生态学
- 水文学的水文学
- 环境科学 环境科学
背景情况:
- 河流生态系统的功能对气候变化,土地利用和水资源管理造成的流动模式变化很敏感.
- 预测河流对流动干扰的弹性是具有挑战性的,因为流动修改和水生社区的变化.
研究的目的:
- 调查河流生产力如何受到高流干扰事件的影响,并从中恢复.
- 确定对跨河生态系统恢复率的宏观控制.
主要方法:
- 利用来自143条河流的每日初级生产总值时间序列的大陆规模数据集.
- 采用修改的人口模型来估计自营生物量增长和流动干扰值.
- 生物质回收率与水气候梯度和收获区特征相比较.
主要成果:
- 生物质回收在较宽的河流中最快,其流量规则较少,高流量干扰更频繁.
- 生物质干扰流量值通常高于地形床干扰值.
- 河流宽度是生产率恢复率的最强有力的预测指标.
结论:
- 河流初级生产者在流动干扰后表现出不同的恢复能力.
- 多种相互作用的宏观因素,特别是河流宽度,决定了河流生态系统的恢复.
- 地形学数据对于预测河流生态系统对变化的流量模式的反应至关重要.
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