Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/eco.1831 |
Microsite and grazing intensity drive infiltration in a semiarid woodland | |
Vandandorj, Sumiya1; Eldridge, David J.2; Travers, Samantha K.1; Val, James3; Oliver, Ian4 | |
通讯作者 | Eldridge, David J. |
来源期刊 | ECOHYDROLOGY
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ISSN | 1936-0584 |
EISSN | 1936-0592 |
出版年 | 2017 |
卷号 | 10期号:4 |
英文摘要 | Human activities such as vegetation removal and overgrazing that result in changes in land cover have substantial impacts on ecosystem processes, including the infiltration of water. Different land cover types (microsites) vary in their capacity to conduct water, but the extent to which infiltration is affected by different herbivores or microsites is largely unknown. We examined the effects of grazing and microsite on infiltration in two extensive woodland communities in semi-arid eastern Australia that vary in current condition. Poor condition sites had lower steady-state infiltration under ponding than either average or good condition sites, and this effect was consistent across the two communities. Ponded infiltration and sorptivity beneath grasses, shrubs or trees were about twice that on bare soil, and this corresponded to greater indices of macroporosity. Structural equation modelling showed that shrubs, trees, and grasses had strong positive effects on sorptivity and steady-state infiltration under ponding, whereas grazing had generally negative effects. The suppressive effects of grazing on soil hydrological processes were mainly due to cattle grazing. The positive effects of grasses, shrubs, and trees on hydrology were twice as strong as the negative effects of grazing. Our results also suggest that prolonged overgrazing that leads to reductions in grass cover is likely to have a synergistic reduction in hydrological function in these woodlands by reducing the cover of highly conductive patches and by reducing the extent of macropores. |
英文关键词 | disk permeameter grazing infiltration livestock macropores semiarid woodland |
类型 | Article |
语种 | 英语 |
国家 | Australia |
收录类别 | SCI-E |
WOS记录号 | WOS:000403068700001 |
WOS关键词 | SOIL PHYSICAL-PROPERTIES ; SHRUB ENCROACHMENT ; WATER INFILTRATION ; EASTERN AUSTRALIA ; SPATIAL-PATTERNS ; ECOSYSTEM STRUCTURE ; CHIHUAHUAN DESERT ; GLOBAL DRYLANDS ; LIVESTOCK ; TREES |
WOS类目 | Ecology ; Environmental Sciences ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Water Resources |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/198393 |
作者单位 | 1.Univ New South Wales, Sch Biol Earth & Environm Sci, Ctr Ecosyst Sci, Sydney, NSW 2052, Australia; 2.Univ New South Wales, Sch Biol Earth & Environm Sci, Ctr Ecosyst Sci, Off Environm & Heritage, Sydney, NSW 2052, Australia; 3.Off Environm & Heritage, Buronga, NSW 2739, Australia; 4.Univ New England, Off Environm & Heritage, Armidale, NSW 2351, Australia |
推荐引用方式 GB/T 7714 | Vandandorj, Sumiya,Eldridge, David J.,Travers, Samantha K.,et al. Microsite and grazing intensity drive infiltration in a semiarid woodland[J],2017,10(4). |
APA | Vandandorj, Sumiya,Eldridge, David J.,Travers, Samantha K.,Val, James,&Oliver, Ian.(2017).Microsite and grazing intensity drive infiltration in a semiarid woodland.ECOHYDROLOGY,10(4). |
MLA | Vandandorj, Sumiya,et al."Microsite and grazing intensity drive infiltration in a semiarid woodland".ECOHYDROLOGY 10.4(2017). |
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