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首页> 外文期刊>Global Ecology and Conservation >Soil and climate effects on leaf nitrogen and phosphorus stoichiometry along elevational gradients
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Soil and climate effects on leaf nitrogen and phosphorus stoichiometry along elevational gradients

机译：沿着高度梯度的叶片氮和磷化学计量的土壤和气候影响

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Abstracts Leaf nitrogen (N) and phosphorus (P) concentrations are critical to plant metabolic processes and growth. Understanding the contribution of climate and soil nutrients on leaf nitrogen and phosphorus concentrations across plant life-forms (trees, shrubs, and herbs) remains incomplete, especially along elevational gradients. To investigate these effects, we combined data from the Plant Trait (TRY) database, containing 528 species distributions, with elevation, climate and soil information for each study site. Results show that leaf N and P content were significantly correlated with elevation ( P ?0.05). The explanatory ability of altitude for changes in N (Rsup2/sup?=?0.40) and P (Rsup2/sup?=?0.21) content in herb leaves is greater than that in trees (Rsup2/sup??0.1). The explanatory ability of elevation for changes in P content (Rsup2/sup?=?0.26) in shrub leaves is higher than that of N content (Rsup2/sup?=?0.12). Furthermore, leaf P was more strongly associated with mean annual precipitation and mean annual temperature. Soil C:N and soil pH were significantly correlated with leaf N and P content, but their ability to explain elevational patterns in leaf N and P was limited. Overall, in leaves, P is more susceptible to environmental influences than N. These findings reveal differences in nutrient cycling and physiological regulation of N and P among different plant forms.
机译：摘要叶片氮（N）和磷（P）浓度对于植物代谢过程和生长至关重要。了解气候和土壤营养物对植物生命形式（树木，灌木和草药）叶片氮和磷浓度的贡献仍然不完整，特别是沿着高度梯度。为了调查这些效果，我们组合来自植物特质（尝试）数据库的数据，其中包含528种分布，每个研究网站的海拔，气候和土壤信息。结果表明，叶N和P含量与升降显着相关（P <0.05）。在草本叶中的n（R 2 α=Δ0.40）和p（r 2 α=Δ0.21）含量的解释性能力大于树木（R 2 ？<？0.1）。在灌木叶中P含量（R 2 α=Δ0.26）的改变的解释能力高于n含量（R 2 Δ=Δ0） 。此外，叶P与平均年降水和平均年度温度更强烈。土壤C：N和土壤pH与叶N和P含量显着相关，但它们在叶N和P中解释升高模式的能力有限。总体而言，在叶片中，P比N叶更容易受到环境影响。这些发现揭示了不同植物形式中N和P的营养循环和生理调节的差异。

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