Leaf Functional Traits and Strategies of Plants in Subalpine Calamagrostis Meadows of the North-Western Caucasus

Q3 Agricultural and Biological Sciences Moscow University Biological Sciences Bulletin Pub Date : 2024-08-29 DOI:10.3103/s0096392524600534

T. V. Poloshevets, V. G. Onipchenko, E. V. Sandalova, T. M. Dzhatdoeva, T. G. Elumeeva

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Abstract

The analysis of plants’ functional traits and strategies is the main direction to study the formation mechanisms of the composition and structure of plant communities. Comparison of the mean species trait values with a random sample of a local flora allows one to determine the importance of the trait for the plant community’s formation. Comparison of mean and weighted mean shows the role of the trait in dominance. The aim of this work was to study the role of leaf functional traits and the contribution of Grime’s CSR strategies in the formation of Calamagrostis subalpine meadows, which are the most widespread in the north-western Caucasus. The aboveground biomass in these communities is 384 ± 21 g/m² (mean and standard error of the mean), the mass of litter of previous years is 393 ± 40 g/m². The share of grasses in the community is 57.1 ± 2.9%, forbs is 32.9 ± 2.6%, legumes is 8.9 ± 1.4%, and sedges and rushes are 1 ± 0.3%. Three species can be considered as dominants: Calamagrostis arundinacea (26.5% of the total phytomass), Festuca varia (23.3%), and Hedysarum caucasicum (8%). The dominants of community have a higher leaf dry mass, lower leaf water content, and a smaller specific leaf area. The community’s components are characterized by a lower mass of the water-saturated leaf and dry matter content, and a higher specific leaf area. Dominants and components in the community are characterized by a greater contribution of the stress-tolerant strategy.

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西北高加索地区亚高山菖蒲草甸植物的叶功能特征和策略

摘要分析植物的功能性状和策略是研究植物群落组成和结构形成机制的主要方向。将物种性状的平均值与当地植物区系的随机样本进行比较，可以确定该性状对植物群落形成的重要性。平均值和加权平均值的比较显示了性状在优势中的作用。这项工作的目的是研究叶片功能性状的作用以及格里姆的 CSR 策略在形成 Calamagrostis 亚高山草甸过程中的贡献，亚高山草甸在高加索西北部分布最广。这些群落的地上生物量为 384 ± 21 克/平方米（平均值和平均值的标准误差），往年的垃圾量为 393 ± 40 克/平方米。群落中禾本科植物占 57.1 ± 2.9%，草本植物占 32.9 ± 2.6%，豆科植物占 8.9 ± 1.4%，莎草和芦苇占 1 ± 0.3%。有三个物种可被视为优势物种：菖蒲（占植物总重量的 26.5%）、Festuca varia（23.3%）和 Hedysarum caucasicum（8%）。群落的优势植物叶片干重较大，叶片含水量较低，叶面积较小。群落成分的特点是饱水叶片的质量和干物质含量较低，比叶面积较大。群落中的优势植物和成分的特点是抗逆策略的贡献较大。

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Moscow University Biological Sciences Bulletin Agricultural and Biological Sciences-Agricultural and Biological Sciences (all)

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期刊介绍： Moscow University Biological Sciences Bulletin is forum for research in all important areas of modern biology. It publishes original work on qualitative, analytical and experimental aspects of research. The scope of articles to be considered includes plant biology, zoology, ecology, evolutionary biology, biophysics, genetics, genomics, proteomics, molecular biology, cell biology, biochemistry, endocrinology, immunology, physiology, pharmacology, neuroscience, gerontology, developmental biology, bioinformatics, bioengineering, virology, and microbiology.