Impacts of Riparian and Non-riparian Woody Encroachment on Tallgrass Prairie Ecohydrology
Impacts of Riparian and Non-riparian Woody Encroachment on Tallgrass Prairie Ecohydrology
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河岸和非河岸木质侵占对高草草原生态水文的影响
DOI：
10.1007/s10021-022-00756-7
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发表时间：
2022
期刊：
影响因子：
3.7
通讯作者：
Dodds, Walter K.
中科院分区：
文献类型：
--
作者：
Keen, Rachel M.;Nippert, Jesse B.;Sullivan, Pamela L.;Ratajczak, Zak;Ritchey, Brynn;O’Keefe, Kimberly;Dodds, Walter K.
木本植物的入侵已经影响了全球范围内的草地生态水文学，促使管理策略，旨在消除木本植被，以防止或减轻水量损失。我们测量流流量持续削减河岸树木（2010-2020年）在本地高草草原（美国堪萨斯东北部）。自20世纪80年代以来，尽管降水量同时增加，但该站点的流量却有所下降。这种下降以前被归因于河岸植被增加了溪流的蒸腾作用。我们使用水稳定同位素（δ 18 O和δ 2 H）来确定河岸草，灌木和树木是否主要使用溪流/地下水或土壤水。此外，我们量化了河岸和非河岸木本覆盖（1978-2020年）的增加，并将其与sap通量数据相结合，以估计蒸腾耗水量的变化。河岸树木的持续砍伐并没有导致流量增加。而不是溪流/地下水，河岸树木（栎属）使用的最大比例的水。克隆灌木山茱萸（Cornusdrummondii）对溪流水的利用比例较高，水分利用的总体变异性较大。1978年至2020年，河岸灌木覆盖增加了约57%。在同一时期，灌木覆盖率增加了约20%，在河岸带以外的地区，导致每日蒸腾水分损失估计增加25%。虽然溪流水的使用是小于50%的所有河岸带的物种，灌木覆盖在这个流域，加上较高的蒸腾速率的灌木，总的增加表明，这些木本物种河岸带内和外的河流流量在这个系统中观察到的下降是关键因素。
Woody encroachment has impacted grassland ecohydrology worldwide, prompting management strategies aimed at woody vegetation removal to prevent or mitigate loss of water yield. We measured stream discharge following sustained cutting of riparian trees (2010–2020) in a native tallgrass prairie (northeastern Kansas, USA). Discharge has declined at this site since the 1980’s despite a concurrent increase in precipitation. This decline has been previously attributed to increased transpiration of stream water by riparian vegetation. We used water stable isotopes (δ18O andδ2H) to determine whether riparian grasses, shrubs, and trees primarily used stream/groundwater or soil water. Additionally, we quantified the increase in riparian and non-riparian woody cover (1978–2020) and combined it with sap-flux data to estimate changes in transpirative water loss. Sustained cutting of riparian trees did not result in increased discharge. Rather than stream/groundwater, the largest proportion of water used by riparian trees (Quercus spp.) was deep soil water.Cornus drummondii(clonal woody shrub) used a higher proportion of stream water and had greater overall variability in water-use. Riparian shrub cover increased about 57% from 1978 to 2020. Over the same time period, shrub cover increased about 20% in areas outside the riparian zone, resulting in an estimated 25% increase in daily transpirative water loss. Although stream water use was less than 50% for all riparian zone species, the total increase in shrub cover on this watershed, coupled with higher transpiration rates of shrubs, suggests that these woody species—within and outside the riparian zone—are key contributors to observed declines in stream flow in this system.
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影响因子：
3.7
作者：
O'Keefe, Kimberly;Bell, David M.;Nippert, Jesse B.
通讯作者：
Nippert, Jesse B.
影响因子：
3.9
作者：
P. Sullivan;Marvin Wes Stops;G. Macpherson;Li Li-Li;D. Hirmas;W. Dodds
通讯作者：
P. Sullivan;Marvin Wes Stops;G. Macpherson;Li Li-Li;D. Hirmas;W. Dodds
清除杜松对塞科溪流域蒸散量和径流的影响
DOI：
--
发表时间：
1998
期刊：
影响因子：
--
作者：
W. Dugas;R. A. Hicks;P. Wright
通讯作者：
P. Wright
观点：西部杜松扩张：对西北干旱生态系统构成威胁吗？
DOI：
--
发表时间：
1996
期刊：
影响因子：
--
作者：
A. J. Belsky
通讯作者：
A. J. Belsky
DOI：
10.1007/978-0-387-35973-1_542
发表时间：
2008
期刊：
--
影响因子：
--
作者：
Yoko Nishimura;Makiko Onishi;A. Kitamoto
通讯作者：
Yoko Nishimura;Makiko Onishi;A. Kitamoto