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Effect of biotic and abiotic factors on inter and intra-event variability in stemflow rates in oak and pine stands in a Mediterranean mountain area
Journal of Hydrology ( IF 6.4 ) Pub Date : 2018-05-01 , DOI: 10.1016/j.jhydrol.2018.03.050
C. Cayuela , P. Llorens , E. Sánchez-Costa , D.F. Levia , J. Latron

Abstract Stemflow, despite being a small proportion of gross rainfall, is an important and understudied flux of water in forested areas. Recent studies have highlighted its complexity and relative importance for understanding soil and groundwater recharge. Stemflow dynamics offer an insight into how rain water is stored and released from the stems of trees to the soil. Past attempts have been made to understand the variability of stemflow under different types of vegetation, but rather few studies have focused on the combined influence of biotic and abiotic factors on inter and intra-storm stemflow variability, and none in Mediterranean climates. This study presents stemflow data collected at high temporal resolution for two species with contrasting canopies and bark characteristics: Quercus pubescens Willd. (downy oak) and Pinus sylvestris L. (Scots pine) in the Vallcebre research catchments (NE of Spain, 42° 12′N, 1° 49′E). The main objective was to understand how the interaction of biotic and abiotic factors affected stemflow dynamics. Mean stemflow production was low for both species (∼1% of incident rainfall) and increased with rainfall amount. However, the magnitude of the response depended on the combination of multiple biotic and abiotic factors. Both species produced similar stemflow volumes and the largest differences were found among trees of the same species. The combined analysis of biotic and abiotic factors showed that funneling ratios and stemflow dynamics were highly influenced by the interaction of rainfall intensity and tree size.

中文翻译:

生物和非生物因素对地中海山区橡树和松林茎流速率的事件间和事件内变异的影响

摘要 尽管茎流仅占总降雨量的一小部分,但它是森林地区重要且研究不足的水通量。最近的研究强调了其对理解土壤和地下水补给的复杂性和相对重要性。茎流动力学提供了对雨水如何储存和从树干释放到土壤的洞察。过去曾尝试了解不同植被类型下茎流的变异性,但很少有研究关注生物和非生物因素对风暴间和风暴内茎流变异性的综合影响,而在地中海气候中则没有。本研究展示了以高时间分辨率收集的具有对比树冠和树皮特征的两个物种的茎流数据:Quercus pubescens Willd。(绒毛橡木)和 Pinus sylvestris L. (苏格兰松)在 Vallcebre 研究集水区(西班牙东北部,42° 12'N,1° 49'E)。主要目的是了解生物和非生物因素的相互作用如何影响茎流动力学。两种物种的平均茎流产量都很低(约占事件降雨量的 1%),并且随着降雨量的增加而增加。然而,响应的大小取决于多种生物和非生物因素的组合。两个物种产生相似的茎流体积,并且在同一物种的树木中发现了最大的差异。生物和非生物因素的综合分析表明,漏斗比和茎流动力学受降雨强度和树木大小相互作用的高度影响。主要目的是了解生物和非生物因素的相互作用如何影响茎流动力学。两种物种的平均茎流产量都很低(约占事件降雨量的 1%),并且随着降雨量的增加而增加。然而,响应的大小取决于多种生物和非生物因素的组合。两个物种产生相似的茎流体积,并且在同一物种的树木中发现了最大的差异。生物和非生物因素的综合分析表明,漏斗比和茎流动力学受降雨强度和树木大小相互作用的高度影响。主要目的是了解生物和非生物因素的相互作用如何影响茎流动力学。两种物种的平均茎流产量都很低(约占事件降雨量的 1%),并且随着降雨量的增加而增加。然而,响应的大小取决于多种生物和非生物因素的组合。两个物种产生相似的茎流体积,并且在同一物种的树木中发现了最大的差异。生物和非生物因素的综合分析表明,漏斗比和茎流动力学受降雨强度和树木大小相互作用的高度影响。反应的程度取决于多种生物和非生物因素的组合。两个物种产生相似的茎流体积,并且在同一物种的树木中发现了最大的差异。生物和非生物因素的综合分析表明,漏斗比和茎流动力学受降雨强度和树木大小相互作用的高度影响。反应的程度取决于多种生物和非生物因素的组合。两个物种产生相似的茎流体积,并且在同一物种的树木中发现了最大的差异。生物和非生物因素的综合分析表明,漏斗比和茎流动力学受降雨强度和树木大小相互作用的高度影响。
更新日期:2018-05-01
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