Abstract

The numerical estimation of ecological strategies (according to the classification of J. Grime) can contribute to plant dominance iunder certain environmental conditions. Alpine plants are traditionally considered as stress-tolerators (S) that are adapted to low temperatures and poor soils. We assessed the hypothesis that the C strategy is more expressed in relatively productive alpine meadows, whereas the R strategy is more important in communities with a short growing season and a heavy snow cover. The structure of the aboveground biomass (ratio between the species) and the parameters of leaves of all species of vascular plants were studied in four communities (alpine lichen heath, ALH; Festuca varia grassland, FVG; Geranium–Hedysarum meadow, GHM, and snowbed community, SBC). Based on these values, the contribution of the C, S, R components to the overall strategy of each species (according to S. Peirce et al.) and the weighted mean values ​​of the contribution of strategies for each community were calculated. The a priori hypothesis was confirmed, while the dominant species showed an increase in the role of stress tolerance on ALH and FVG and competitiveness on GHMs, which indicates the adaptability of these strategies in the studied communities. The contribution of C and S is in good agreement with the role of competition in the formation of various communities: it is maximal for GHMs, in which the C strategy is expressed, and minimal for FVGs, in which stress tolerance is most pronounced.

中文翻译：

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高山社区中与植物统治相关的哪些植物策略？

摘要

在某些环境条件下，生态策略的数字估计（根据J. Grime的分类）可有助于植物的优势。传统上，高山植物被认为是适应低温和恶劣土壤的胁迫耐受性（S）。我们评估了以下假设：C策略在相对高产的高寒草甸中表达更多，而R策略在生长季节短，积雪量大的社区中更为重要。在四个社区（高山地衣荒地，ALH；Festuca varia草原，FVG；天竺葵– Hedysarum）的四个群落中研究了地上生物量的结构（物种之间的比率）和所有维管植物物种的叶片参数草甸（GHM）和雪床社区（SBC）。根据这些值，计算出C，S，R成分对每个物种总体策略的贡献（根据S.Peirce等人的数据）以及每个社区策略的贡献的加权平均值。先验假说得到了证实，而优势种显示出胁迫耐受性对ALH和FVG的作用以及对GHMs的竞争性的增加，这表明这些策略在所研究的社区中具有适应性。C和S的贡献与竞争在各种社区形成中的作用非常吻合：对于表达C策略的GHM来说是最大的，而对于FVG来说是最弱的，在FVG中压力耐受性最明显。