Intraspecific Trait Variation Dilutes Deterministic Processes in Community Assembly of Arid Shrubs across Multiple Scales
Intraspecific Trait Variation Dilutes Deterministic Processes in Community Assembly of Arid Shrubs across Multiple Scales
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种内性状变异稀释了多尺度干旱灌木群落组装的确定性过程
DOI：
10.3390/d12120447
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发表时间：
2020-11
期刊：
影响因子：
2.4
通讯作者：
Yue Ming
中科院分区：
文献类型：
--
作者：
Xu Jinshi;Dang Han;Tian Tingting;Chai Yongfu;Quan Jiaxin;Lei Maolin;Liu Xiao;Guo Yaoxin;Yue Ming
基于性状的方法为提高我们对物种共存和群落组装的理解提供了一条有希望的途径，而跨空间尺度的种内性状变异（ITV）在基于性状的群落组装机制中非常重要，特别是在极端环境中。研究了荒漠群落在不同空间尺度上的功能多样性和群落聚集模式，并探讨了ITV在干旱生境群落聚集过程中是否起着重要作用。在腾格里沙漠与黄土高原过渡带的典型荒漠群落中建立了一个50 m × 50 m的不同小样方样地。选取了14个性状，评价了群落基于性状的功能多样性和组装过程。我们发现，在考虑ITV的情况下，功能多样性表现出不同的模式，并与不同类型的性状（化学性状或形态性状）和某些土壤因子（pH和硝态氮）有关。基于功能性状方法的植物群落在不同空间尺度上均表现出随机分布格局和相似的功能多样性格局。此外，独立电视台对社区聚集的影响并没有随着规模的增加而增加。这些结果表明，ITV稀释了干旱生境跨尺度群落聚集的确定性过程。
Trait-based approaches present a promising avenue for improving our understanding of species coexistence and community assembly, while intraspecific trait variation (ITV) across different spatial scales is important in trait-based community assembly mechanisms, especially in extreme environments. In this study, we focused on the functional diversity and community assembly patterns of a desert community across different spatial scales and investigated whether ITV plays a significant role in community assembly processes in arid habitats. A 50 m x 50 m plot with different small quadrats was established in a typical desert community at the transition zone between the Tengger Desert and Loess Plateau in China. A total of 14 traits were selected to assess the trait-based functional diversity and assembly processes in the community. We found that functional diversity showed different patterns when considering ITV and related to different types of traits (chemical traits or morphological traits) and some soil factors (pH and nitrate nitrogen). Plant communities in this study showed stochastic distribution patterns and similar functional diversity patterns based on functional trait approaches, regardless of spatial scales. Also, the effect of ITV on community assembly did not show more effect with increasing scales. These results indicated that ITV diluted deterministic processes in community assembly across scales in arid habitats.
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