globalchange  > 气候减缓与适应
DOI: 10.1111/1365-2664.13250
WOS记录号: WOS:000454957300016
论文题名:
Landscape pivot points and responses to water balance in national parks of the southwest US
作者: Thoma, David P.1,2; Munson, Seth M.3; Witwicki, Dana L.2
通讯作者: Thoma, David P.
刊名: JOURNAL OF APPLIED ECOLOGY
ISSN: 0021-8901
EISSN: 1365-2664
出版年: 2019
卷: 56, 期:1, 页码:157-167
语种: 英语
英文关键词: climate change ; Colorado Plateau ; drought ; ecohydrology ; evapotranspiration ; NDVI ; soil moisture ; vegetation production
WOS关键词: SOIL-MOISTURE ; PRECIPITATION ; CLIMATE ; PRODUCTIVITY ; RAINFALL ; SCIENCE ; DEFICIT ; SAFETY ; LEAVES ; MODEL
WOS学科分类: Biodiversity Conservation ; Ecology
WOS研究方向: Biodiversity & Conservation ; Environmental Sciences & Ecology
英文摘要:

A recent drying trend that is expected to continue in the southwestern US underscores the need for site-specific and near real-time understanding of vegetation vulnerability so that land management actions can be implemented at the right time and place. We related the annual integrated normalized difference vegetation index (iNDVI), a proxy for vegetation production, to water balance across landscapes of the Colorado Plateau. We determined how changes in production per unit of water (vegetation responses) and the water balance amounts at which production shifted from above to below average values (pivot points), varied across dominant vegetation and soil types. Precipitation (PRCP), actual evapotranspiration (AET), water deficit (D), and soil moisture (SM) explained 13%-82% of variation in vegetation production. Along an increasing water availability gradient, vegetation responses to PRCP and AET increased, responses to SM decreased, and responses to D became more negative. We found trade-offs between vegetation responses and pivot points within and across all vegetation types that were mediated by soil properties. Synthesis and applications. The water needed by native vegetation to maintain production depends on plant traits. The water available to vegetation depends on climate and soil properties that change along environmental gradients. Tracking this biologically relevant water availability in relation to water need provides an indicator of vegetation growth or stress that can help guide the time and place for management actions.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/127207
Appears in Collections:气候减缓与适应

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作者单位: 1.Natl Pk Serv, Inventory & Monitoring Program, Bozeman, MT 59715 USA
2.Natl Pk Serv, Inventory & Monitoring Program, Moab, UT 84532 USA
3.US Geol Survey, Southwest Biol Sci Ctr, Flagstaff, AZ 86001 USA

Recommended Citation:
Thoma, David P.,Munson, Seth M.,Witwicki, Dana L.. Landscape pivot points and responses to water balance in national parks of the southwest US[J]. JOURNAL OF APPLIED ECOLOGY,2019-01-01,56(1):157-167
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