V. G. Onipchenko, K. N. Zamaletdinova, M. I. Makarov, M. S. Kadulin, T. I. Malysheva, G. V. Klink, T. V. Poloshevets, T. G. Elumeeva
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引用次数: 0
Abstract
Contents of C, N, and P and N : P and C : N ratios in plant leaves have been studied in four alpine phytocenoses of the northwestern Caucasus to find out whether the species encountered in these areas differ in chemical composition from random samples from the local flora or not and determine the significance of the values of these traits for dominance, as well as their phylogenetic conservation. The content of nitrogen is lower in the leaves of plants from alpine heaths and Festuca varia grasslands and higher in the leaves of species of Geranium–Hedysarum meadows and alpine snowbeds than in a random sample. Dominants of productive Geranium–Hedysarum meadows contain more nitrogen than nondominant species, while the opposite dependence has been recorded for the other communities. The leaves of the components of all communities except alpine snowbeds contain less phosphorus than a random sample. Dominants of alpine heaths have less phosphorus and Geranium–Hedysarum meadows have more phosphorus in the leaves than nondominant species. The C : N ratio in the leaves is higher than the random value in species of alpine heaths and Festuca varia grasslands and lower in other communities. The dominant species have higher C : N ratios than the other species in all communities except Geranium–Hedysarum meadows. The N : P ratio is higher than the random value in species of all communities except Festuca varia grasslands. All the traits except the C : N ratio have a significant phylogenetic signal.
摘要 在高加索西北部的四个高寒植物区系中研究了植物叶片中的碳、氮、磷含量以及氮：磷和碳：氮比率，以了解这些地区的物种在化学成分上是否与当地植物区系的随机样本存在差异，并确定这些特征值对优势地位的意义及其系统发育保持情况。与随机样本相比，高山石楠和Festuca varia草地植物叶片中的氮含量较低，而天竺葵-Hedysarum草甸和高山雪床物种叶片中的氮含量较高。高产天竺葵-Hedysarum 草甸优势物种的含氮量高于非优势物种，而其他群落则相反。除高山雪床外，所有群落的叶片含磷量都低于随机样本。与非优势物种相比，高山石楠的优势物种叶片含磷量较低，而天竺葵-Hedysarum 草甸的优势物种叶片含磷量较高。高山石楠和马齿苋草地物种叶片中的碳氮比高于随机值，而其他群落则较低。在除天竺葵-Hedysarum 草甸之外的所有群落中，优势物种的碳氮比都高于其他物种。除 Festuca varia 草地外，所有群落中物种的氮磷比均高于随机值。除 C : N 比率外，所有性状都有显著的系统发育信号。
期刊介绍：
The Russian Journal of Ecology publishes completed original studies in all branches of theoretical and experimental ecology, reviews, articles on topics currently in debate, and information on new methods of research.
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