River channel response to invasive plant treatment across the American Southwest
River channel response to invasive plant treatment across the American Southwest
复制标题
美国西南部河道对入侵植物处理的反应
DOI：
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复制
发表时间：
2022
影响因子：
3.3
通讯作者：
S. Rathburn
中科院分区：
文献类型：
--
作者：
C. Wieting;J. Friedman;S. Rathburn
入侵河岸植物于19世纪初被引入美国西南部，并在20世纪造成了河道宽度和迁移速度减少的区域趋势。最近，特别是自1990年以来，清除入侵河岸植被（IRV）的努力已经广泛开展。IRV治疗在多大程度上扭转了早期通道狭窄和活力降低的趋势？在这项研究中，在美国西南部的区域尺度上，对13条河流的15个地点进行了配对处理和未处理的河段进行了IRV处理前后的比较，使用重复航空图像来评估长期（~10年）河道变化。我们发现IRV处理显著增加了河道宽度和洪泛平原的破坏。在15个站点中，有14个站点经过处理的河段河滩破坏程度高于未经处理的河段，IRV处理使河滩破坏率增加了1.9的中位数因子。在研究期间，处理效果随着最大水流功率的增加而增加。将河道变化的观测结果分解为洪泛平原破坏和形成的单独措施，比简单测量河道宽度和中心线迁移率提供了更多关于潜在过程的信息。实施IRV治疗项目的恢复从业者通常关注野生动物或植被的反应；然而，在恢复规划中应该考虑地貌过程，因为它们驱动水生栖息地和植被动态，并且因为对下游基础设施的潜在破坏。根据恢复目标，管理实践可用于增强或最小化由IRV处理引起的通道动态的增加。
Invasive riparian plants were introduced to the American Southwest in the early 19th century and contributed to regional trends of decreasing river channel width and migration rate in the 20th century. More recently, efforts to remove invasive riparian vegetation (IRV) have been widespread, especially since 1990. To what extent has IRV treatment reversed the earlier trend of channel narrowing and reduced dynamism? In this study, paired treated and untreated reaches at 15 sites along 13 rivers were compared before and after IRV treatment using repeat aerial imagery to assess long‐term (~10‐year) channel change due to treatment on a regional scale across the Southwest USA. We found that IRV treatment significantly increased channel width and floodplain destruction. Treated reaches had higher floodplain destruction than untreated reaches at 14 of 15 sites, and IRV treatment increased the rate of floodplain destruction by a median factor of 1.9. The effect of treatment increased with the stream power of the largest flow over the study period. Resolving observations of channel change into separate measures of floodplain destruction and formation provided more information on underlying processes than simple measurements of channel width and centerline migration rate. Restoration practitioners who perform IRV treatment projects often focus on wildlife or vegetation response; however, geomorphic processes should be considered in restoration planning because they drive aquatic habitat and vegetation dynamics, and because of the potential for damage to downstream infrastructure. Depending on the restoration goal, management practices can be used to enhance or minimize the increase in channel dynamism caused by IRV treatment.
沉积物建模与入侵河岸植被动力学耦合的生态地貌框架
DOI：
10.1029/2021jf006071
发表时间：
2021
期刊：
Journal of Geophysical Research: Earth Surface
影响因子：
--
作者：
Gilbert, Jordan T.;Wilcox, Andrew C.
通讯作者：
Wilcox, Andrew C.