Isotopic values of plants in relation to water availability in the Eastern Mediterranean region.
Isotopic values of plants in relation to water availability in the Eastern Mediterranean region.
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DOI：
10.1007/s00442-009-1514-7
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发表时间：
2010-04
期刊：
影响因子：
2.7
通讯作者：
Danin A
中科院分区：
文献类型：
--
作者：
Hartman G;Danin A
植物碳、氮同位素值往往与全球和区域尺度的降雨量相关。本研究探讨了东地中海地区的植物同位素值和降雨量之间的关系。结果表明，C3植物群落的碳、氮同位素值与降雨量之间存在显著的相关性。当植物群落被植物生活型划分时，这种重要的关系得以维持。此外，在旱季期间观察到的C同位素值的季节性增加，而N同位素值保持稳定的湿季和旱季。最后，来自沙漠环境的植物中的同位素模式不同于来自地中海环境的植物，因为一些沙漠植物从二次来源获得大部分水分，即通过当地地形特征而不是直接降雨引导的水。从这些结果可以得出结论，水的可用性是控制在东地中海的植物群落中的C和N同位素变异的主要因素。本文的在线版本（doi：10.1007/s 00442 -009-1514-7）包含补充材料，可供授权用户使用。
Plant C and N isotope values often correlate with rainfall on global and regional scales. This study examines the relationship between plant isotopic values and rainfall in the Eastern Mediterranean region. The results indicate significant correlations between both C and N isotope values and rainfall in C3 plant communities. This significant relationship is maintained when plant communities are divided by plant life forms. Furthermore, a seasonal increase in C isotope values is observed during the dry season while N isotope values remain stable across the wet and dry seasons. Finally, the isotopic pattern in plants originating from desert environments differs from those from Mediterranean environments because some desert plants obtain most of their water from secondary sources, namely water channeled by local topographic features rather than direct rainfall. From these results it can be concluded that water availability is the primary factor controlling C and N isotope variability in plant communities in the Eastern Mediterranean. The online version of this article (doi:10.1007/s00442-009-1514-7) contains supplementary material, which is available to authorized users.
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