Within- and among-species variation in specific leaf area drive community assembly in a tropical cloud forest
Within- and among-species variation in specific leaf area drive community assembly in a tropical cloud forest
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DOI：
10.1007/s00442-011-2050-9
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发表时间：
2011-12-01
期刊：
影响因子：
2.7
通讯作者：
Ding, Yi
中科院分区：
文献类型：
--
作者：
Long, Wenxing;Zang, Runguo;Ding, Yi
比叶面积（SLA）是反映资源捕获和保护之间的权衡的关键功能性状，并已被确定为在植物群落组装中发挥重要作用。群落组装的机制模型认为，当地群落中物种的组装是由功能性状上的环境过滤器控制的。我们测量了内和外物种的SLA的变化，在热带云雾林的环境条件，探讨如何在这个功能特性的变化有助于社区组装。SLA的变化在物种水平上也分解成α（内组合的变化），β（跨组合的变化）值。SLA下降，增加太阳辐照度（近似使用植物高度）在三个研究地点，并在三个网站之间的差异内和两个物种的比较。平均情节SLA，占内和物种之间的三个站点，增加了显着的空气温度，但不是当地的光合光子通量密度和土壤全磷。α SLA下降，增加太阳辐照度内的三个网站和β SLA不同的三个网站。我们的研究结果清楚地表明，光和空气温度是关键的环境因素，参与组织植物物种内和社区之间的热带云雾林。SLA和环境条件的种内和种间变异之间的密切关系，强烈证实了性状变异在热带云雾林群落植物物种组装中的作用，通过与光照和气温相关的环境过滤。
Specific leaf area (SLA) is a key functional trait reflecting the trade-off between resource capture and conservation, and has been identified as playing an important role in plant community assembly. Mechanistic models of community assembly state that the assemblage of species in a local community is controlled by environment filters operating on functional traits. We measured within- and among-species variation of SLA, and environmental conditions in a tropical cloud forest to explore how variation in this functional trait contributes to community assembly. SLA variation at the species level was also decomposed into alpha (within assemblage variation), and beta (across assemblage variation) values. SLA decreased with increasing solar irradiance (approximated using plant height) within the three study sites, and differed among the three sites both for within- and among-species comparisons. Mean plot SLA, accounting for both within and among species across the three sites, increased significantly in relation to air temperature but not local photosynthetic photon flux density and soil total phosphorus. Alpha SLA decreased with increasing solar irradiance within the three sites and beta SLA differed among the three sites. Our results clearly demonstrate that light and air temperature are key environmental factors involved in organizing plant species within and among communities in tropical cloud forests. The strong relationship between both intra- and interspecific variation in SLA and environmental conditions strongly confirms the role of trait variation in the assembly of plant species in tropical cloud forest communities via environment filtering related to light availability and air temperature.