在夏季生长季节期间,三条河流网络的流热状态驱动器的空间和时间变化
Matthew R Fuller1, Naomi E Detenbeck2, Peter Leinenbach3
1Oak Ridge Institute for Science and Education Postdoc at the Atlantic Coastal Environmental Sciences Division, U.S. Environmental Protection Agency, Narragansett, Rhode Island, USA [Currently: Northern Research Station, U.S. Forest Service, Amherst, Massachusetts, USA].
Journal of the American Water Resources Association
|February 20, 2024
概括
河流温度上升威胁着水生生物. 本研究确定了影响河流温度的关键景观,气候和管理因素,有助于冷水物种的有针对性的保护工作.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 水文学的水文学
背景情况:
- 气候变化导致的水温上升对冷水水生生物产生负面影响.
- 在依赖冷水的物种中观察到息地和种群的减少.
- 了解河流的热系统对于有效的生态恢复至关重要.
研究的目的:
- 开发一个建模过程,以确定河流温度驱动因素与景观,气候和管理共变量之间的统计关系.
- 分析河流盆地内和河流盆地之间流水温度的空间和时间变化.
- 根据已识别的驱动因素的相对重要性,确定潜在的恢复行动.
主要方法:
- 开发了一个统计建模过程,以将流体温度驱动器与相关共变量联系起来.
- 该模型在美国西北太平洋的三个研究区域进行了测试,在生长季节 (五月,八月,九月) 进行了测试.
- 使用相对重要性指标来评估共变量重要性.
主要成果:
- 物理景观 (海拔,流域,主要运河坡度) 和气候 (月平均气温,排放) 协变量是最重要的.
- 管理共变量,包括地下水使用和河岸阴影,也显示出较高的相对重要性.
- 斜率的影响从5月份的局部到达斜率转移到生长季节晚些时候的区域主通道斜率.
结论:
- 开发的建模过程有效地确定了流水温度的区域一致性和本地特定驱动因素.
- 与管理相关的因素很重要,表明有针对性的恢复行动的潜力.
- 这些发现有助于对冷水水生态系统进行生态相关规模的恢复规划.
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