Functional diversity of the Australian flora: Strong links to species richness and climate
Functional diversity of the Australian flora: Strong links to species richness and climate
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DOI：
10.1111/jvs.13018
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发表时间：
2021-03-01
影响因子：
2.8
通讯作者：
Gallagher, Rachael, V
中科院分区：
文献类型：
--
作者：
Andrew, Samuel C.;Mokany, Karel;Gallagher, Rachael, V
植物群落的分类和功能组成捕捉多样性的不同方面。功能多样性（FD）-从物种特征计算-通常增加与物种丰富度的社区，预计将在不太极端的环境中，更广泛的功能策略可以持续较高。此外，木本和草本植物家族可能对不同生物区的FD做出不成比例的贡献。为了以澳大利亚为例来理解这些问题，我们的目标是量化FD的变化：（a）与物种丰富度，（B）与气候，和（c）代表不同生长形式的主要植物科之间。将003个物种合并，并使用超体积近似FD（即多维物种组合性状生态位）的基础上，三个关键性状理解植物生态策略：叶片大小、种子质量和成虫高度。计算植物组合超体积，包括所有物种与合适的栖息地在每个10 × 10公里的网格单元在澳大利亚，并在每个85个生物区。在生物区FD也分别计算了一套主要是木本和草本植物的家庭。结果在10 km × 10 km网格单元和生物区分析中，FD与物种丰富度和年降水量呈正相关，与夏季最高气温呈负相关（均p < 0.005）。然而，FD是最低的中间冬季最低温度。代表不同的生长形式的家庭中确定的模式不同的观察到的所有物种analysedtogether.Conclusions FD和气候之间的强有力的联系可能意味着显着的变化，在FD的生态系统与气候变化。监测FD和相关生态系统功能的变化需要对FD有详细的了解，我们开始在这项研究中发展。
Questions The taxonomic and functional composition of plant communities captures different dimensions of diversity. Functional diversity (FD) - as calculated from species traits - typically increases with species richness in communities and is expected to be higher in less extreme environments, where a broader range of functional strategies can persist. Further, woody and herbaceous plant families may contribute disproportionately to FD in different bioregions. To build an understanding of these questions using Australia as a case study, we aimed to quantify how FD varies: (a) with species richness, (b) with climate, and (c) between major plant families representing different growth forms.Location Australia.Methods Data on species distribution and functional traits for 14,003 species were combined and FD approximated using hypervolumes (i.e. multidimensional species assemblage trait niche) based on three traits key to understanding plant ecological strategies: leaf size, seed mass and adult height. Plant assemblage hypervolumes were calculated including all species with suitable habitat in each 10 x 10 km grid cell across Australia, and in each of 85 bioregions. Within bioregions FD was also calculated separately for a suite of largely woody and herbaceous plant families. Relationships between FD, species richness and climate were explored.Results As predicted, FD was positively related to species richness and annual precipitation, and negatively related to summer maximum temperature, both in analyses of 10 km x 10 km grid cells and of bioregions (all p < 0.005). However, FD was lowest at intermediate winter minimum temperatures. Patterns identified in families representing different growth forms varied to those observed for all species analysed together.Conclusions Strong links between FD and climate could mean significant shifts in the FD of ecosystems with climate change. Monitoring changes in FD and associated ecosystem functions requires a detailed understanding of FD, which we begin to develop in this study.