中纬度草本植物群落竞争优势的信号
A signal of competitive dominance in mid-latitude herbaceous plant communities
摘要：
了解物种在空间和时间上共存的主要决定因素是生态学的核心问题。然而，生态学家仍然对生物相互作用的规模和条件以及它们如何与环境相互作用以构建物种组合知之甚少。在这里，我们使用最新的理论发展，分析植物分布和性状数据在欧洲，发现株高聚类蒸散量和总初级生产力。这种集群是植物之间种间竞争的信号，这在中纬度生态区最为明显，那里的生长条件（反映在实际蒸散率和总初级生产力上）是最佳的。远离这一最佳状态，气候的严酷性可能会压倒竞争的影响，或者其他相互作用变得越来越重要。我们的方法弥补了物种丰富的竞争理论和大规模物种分布数据分析之间的差距。
英文摘要：
Understanding the main determinants of species coexistence across space and time is a central question in ecology. However, ecologists still know little about the scales and conditions at which biotic interactions matter and how these interact with the environment to structure species assemblages. Here we use recent theory developments to analyze plant distribution and trait data across Europe and find that plant height clustering is related to both evapotranspiration and gross primary productivity. This clustering is a signal of interspecies competition between plants, which is most evident in mid-latitude ecoregions, where conditions for growth (reflected in actual evapotranspiration rates and gross primary productivities) are optimal. Away from this optimum, climate severity likely overrides the effect of competition, or other interactions become increasingly important. Our approach bridges the gap between species-rich competition theories and large-scale species distribution data analysis.
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