Spatial distribution of tree species governs the spatio-temporal interaction of leaf area index and soil moisture across a forested landscape.
Spatial distribution of tree species governs the spatio-temporal interaction of leaf area index and soil moisture across a forested landscape.
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DOI：
10.1371/journal.pone.0058704
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Eissenstat DM
中科院分区：
文献类型：
--
作者：
Naithani KJ;Baldwin DC;Gaines KP;Lin H;Eissenstat DM
物候与水文耦合时空动态的量化及其过程的理解是生态水文学研究的一个基本挑战。长期以来，物候变化及其影响因素一直受到生态学家的关注，但生物多样性对景观物候和水文耦合动态的影响在很大程度上尚未得到验证。2010年，我们在同一位置的空间网格上测量了叶面积指数(L)和土壤体积含水量（θ），以表征宾夕法尼亚州中部森林流域的森林物候和水文特征。采用层次贝叶斯模型对L和θ的时空格局进行量化。研究结果表明，树种在景观中的空间分布形成了独特的L时空格局，这种格局形成了以土壤水分变化为反映的时空需水量格局。我们发现L的增加和θ的下降之间有大约11天的滞后。植被和土壤水分从叶片开始到成熟逐渐均匀耦合，但从叶片成熟到衰老逐渐不均匀耦合。我们的研究结果揭示了生物多样性与土壤水文之间的时空耦合关系，有助于加强湿润温带森林的生态水文建模。
Quantifying coupled spatio-temporal dynamics of phenology and hydrology and understanding underlying processes is a fundamental challenge in ecohydrology. While variation in phenology and factors influencing it have attracted the attention of ecologists for a long time, the influence of biodiversity on coupled dynamics of phenology and hydrology across a landscape is largely untested. We measured leaf area index (L) and volumetric soil water content (θ) on a co-located spatial grid to characterize forest phenology and hydrology across a forested catchment in central Pennsylvania during 2010. We used hierarchical Bayesian modeling to quantify spatio-temporal patterns of L and θ. Our results suggest that the spatial distribution of tree species across the landscape created unique spatio-temporal patterns of L, which created patterns of water demand reflected in variable soil moisture across space and time. We found a lag of about 11 days between increase in L and decline in θ. Vegetation and soil moisture become increasingly homogenized and coupled from leaf-onset to maturity but heterogeneous and uncoupled from leaf maturity to senescence. Our results provide insight into spatio-temporal coupling between biodiversity and soil hydrology that is useful to enhance ecohydrological modeling in humid temperate forests.
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影响因子：
1.3
作者：
Guo, Qinghua;Li, Wenkai;Alvarez, Otto
通讯作者：
Alvarez, Otto
影响因子：
5.2
作者：
Breshears, DD;Barnes, FJ
通讯作者：
Barnes, FJ
DOI：
10.1139/b83-230
发表时间：
1983-01-01
期刊：
CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE
影响因子：
--
作者：
KIKUZAWA, K
通讯作者：
KIKUZAWA, K
影响因子：
7.3
作者：
CHEN, JM;BLACK, TA
通讯作者：
BLACK, TA
影响因子：
1.1
作者：
Estrella, Nicole;Sparks, Tim H.;Menzel, Annette
通讯作者：
Menzel, Annette