Vegetation responses to climatic and geologic controls on water availability in southeastern Arizona
Vegetation responses to climatic and geologic controls on water availability in southeastern Arizona
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亚利桑那州东南部植被对气候和地质控制对水资源可用性的响应
DOI：
10.1088/1748-9326/abfe8c
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发表时间：
2021
影响因子：
6.7
通讯作者：
Caylor, Kelly K
中科院分区：
文献类型：
--
作者：
Sabathier, Romy;Singer, Michael Bliss;Stella, John C;Roberts, Dar A;Caylor, Kelly K
干旱地区的植被分布、组成和健康在很大程度上取决于受气候、当地地形和地质控制的水的可得性。尽管对植物群落中的气候和地质驱动因素有了普遍的了解，但不同地方控制下的地区的植物对水分配和储存的反应趋势却知之甚少。在这里，我们研究了在亚利桑那州东南部季风驱动的干旱地区，地质控制的空间异质性和气候的时间变化之间的几十年的相互作用，以及它们对植被水分有效性和植物响应(通过归一化植被指数NDVI)的影响。研究发现，草地表现出较低的NDVI，对季风降水有直接响应。在高地，西向坡面和峡谷中的植被具有相似的NDVI平均值和变异性，这表明它们都使用通过裂隙岩石的地表地下水流动路径的水。在圣佩德罗河沿岸，落叶河岸林地的径流、地下水和NDVI对季风降雨有强烈的响应，但水的可获得性在湿润(常年)、中游和干燥之间分层，受不同的当地地质控制因素影响，这些因素影响了地下水位的升高。这些控制措施与驱动气候相互作用，影响河岸带浅层冲积含水层的水可获得性，而河岸带浅层冲积含水层是走廊高山植物的主要水源。该地区最近转向加强季风，导致草原和圣佩德罗河干旱地区的可用水增加，而在较潮湿的地区，这种好处较小，那里的河岸森林显示出已达到成熟的迹象，NDVI趋势减弱。这些结果对旱地植被未来对气候变化的脆弱性有影响，气候变化可能会受到地质学等当地控制的抑制或加剧。
Vegetation distribution, composition and health in arid regions are largely dependent on water availability controlled by climate, local topography and geology. Despite a general understanding of climatic and geologic drivers in plant communities, trends in plant responses to water distribution and storage across areas under different local controls are poorly understood. Here we investigate the multi-decadal interactions between spatial heterogeneity of geologic controls and temporal variation of climate, and their impacts on water availability to vegetation and plant responses (via normalized difference vegetation index, NDVI) in a monsoon-driven arid region of southeastern Arizona. We find that grasslands display low NDVI and respond directly to monsoonal rainfall. In the uplands, vegetation on west-facing slopes and in canyons share similar NDVI averages and variability, suggesting that they both use water from surface-groundwater flow paths through fractured rocks. Along the San Pedro River, streamflow, groundwater, and NDVI in deciduous riparian woodlands are strongly responsive to monsoonal rainfall, but water availability stratifies between wet (perennial), intermediate, and dry reaches, underlain by different local geologic controls that affect water table elevation. These controls interact with the driving climate to affect water availability in the shallow alluvial aquifer of the riparian zone, a primary water source to the gallery phreatophytes. A recent shift toward a strengthened monsoon in the region has led to an increase in water availability for grasslands and for dry reaches of the San Pedro, while the benefit is more muted along wetter reaches, where the riparian forest shows signs of having reached its maturity, with diminished trends in NDVI. These results have implications for the future vulnerability of dryland vegetation to climate change, which may be either dampened or intensified by local controls such as geology.
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影响因子：
3.2
作者：
Mayes, Marc;Caylor, Kelly K.;Nagler, Pamela
通讯作者：
Nagler, Pamela
亚利桑那州东南部上圣佩德罗盆地谢拉维斯塔子流域的水文条件和可持续地下水利用评估
DOI：
--
发表时间：
2016
期刊：
影响因子：
--
作者：
B. Gungle;J. Callegary;Nicholas V. Paretti;J. Kennedy;C. Eastoe;Dale S. Turner;J. Dickinson;L. Levick;Z. Sugg
通讯作者：
Z. Sugg
亚利桑那州东南部科奇斯县上圣佩德罗盆地 Sierra Vista 子流域的水文地质调查
DOI：
--
发表时间：
1999
期刊：
影响因子：
--
作者：
D. Pool;A. L. Coes
通讯作者：
A. L. Coes
亚利桑那州东南部上圣佩德罗盆地谢拉维斯塔亚流域的短流河道和盆底渗透和补给
DOI：
--
发表时间：
2013
期刊：
影响因子：
--
作者：
A. L. Coes;D. Pool
通讯作者：
D. Pool
亚利桑那州东南部降雨和径流的数十年持续性事件
DOI：
--
发表时间：
2008
期刊：
影响因子：
--
作者：
D. Goodrich;C. Unkrich;T. Keefer;M. Nichols;J. Stone;L. Levick;R. Scott
通讯作者：
R. Scott