Warming alters plant phylogenetic and functional community structure
Warming alters plant phylogenetic and functional community structure
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DOI：
10.1111/1365-2745.13448
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发表时间：
2020-07
影响因子：
5.5
通讯作者：
Juntao Zhu;Yang-jian Zhang;Xian Yang;Ning Chen;Shaopeng Li;Pandeng Wang;Lin Jiang
中科院分区：
文献类型：
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作者：
Juntao Zhu;Yang-jian Zhang;Xian Yang;Ning Chen;Shaopeng Li;Pandeng Wang;Lin Jiang
众所周知，气候变化会影响地球生态系统的许多方面。然而，很少有人知道它对生态群落的系统发育和功能特性的影响。本文通过为期6年的多层次气候变暖实验，研究了青藏高原高寒草地植物群落在分类、系统发育和功能水平上对环境变暖的响应。虽然低水平变暖没有改变植物物种丰富度或系统发育/功能群落结构，但高水平变暖显着降低了物种丰富度。更高水平的变暖更强烈地减少土壤水分，导致更强的环境过滤，从而改变物种组成和群落结构。在植物功能性状水平上，高水平变暖通过改变植物高度对物种灭绝和SLA对物种定殖的影响等性状来促进物种周转。因此，高水平（而不是低水平）的变暖通过过滤掉功能上不同的物种和与居民物种远亲的物种，使系统发育/功能群落结构从过度分散变为随机性。合成.我们的研究提供的证据表明，植物系统发育和功能群落结构对低变暖的反应不同于那些在未来的升温情景。重要的是，物种的灭绝是功能上不同的和远亲的居民种有助于改变植物群落结构下的高变暖。我们的研究强调，需要将系统发育和功能的角度来获得更完整的了解社区对气候变暖的反应。
Climate change is known to affect many facets of the Earth's ecosystems. However, little is known about its impacts on phylogenetic and functional properties of ecological communities. Here we studied the responses of plant communities in an alpine grassland on the Tibetan Plateau to environmental warming across taxonomic, phylogenetic and functional levels in a 6‐year multiple‐level warming experiment. While low‐level warming did not alter either plant species richness or phylogenetic/functional community structure, high‐level warming significantly decreased species richness. Higher level warming more strongly reduced soil moisture and caused stronger environmental filtering, consequently changing species composition and community structure. At the plant functional trait level, high‐level warming promoted species turnover through altering the effects of traits such as plant height on species extinction and SLA on species colonization. As a result, high‐, but not low‐level warming drove phylogenetic/functional community structure from overdispersion to randomness, by filtering out species that were functionally dissimilar and distantly related to the resident species. Synthesis. Our study provides evidence that the responses of plant phylogenetic and functional community structure to low warming differ from those in the future scenarios of increasing temperature. Importantly, the extinction of species that was functionally dissimilar and distantly related to the resident species contributed to alterations in plant community structure under high warming. Our study underscores the need to incorporate the phylogenetic and functional perspectives to gain a more complete understanding of community responses to climate warming.