花卉和传粉昆虫的功能多样性是海拔梯度网络结构的中介

IF 2.6 3区 生物学 Q2 PLANT SCIENCES
Luis A. Aguirre, Robert R. Junker
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引用次数: 0

摘要

高山生态系统的海拔梯度非常适合研究植物和传粉昆虫群落如何应对气候变化。在奥地利阿尔卑斯山,我们测试了植物及其传粉昆虫的分类和功能多样性如何随着海拔的升高而变化,以及这如何影响植物-传粉昆虫网络结构。我们测量了沿海拔梯度分布的 24 个群落中开花植物及其传粉昆虫的表型,并观察了它们之间的相互作用。为了评估花卉和传粉昆虫性状的变化,我们对每个群落中的花卉和传粉昆虫所占据的性状空间(n 维超体积)进行了量化。为了评估植物-传粉昆虫网络结构,我们对每个群落的互补专业化水平(H2')、模块化和嵌套度(加权 NODF)进行了量化。随着海拔的升高,大多数多样性和网络专业化水平要么呈线性下降,要么呈振荡下降。传粉昆虫功能多样性较高的群落,其互补专业化和模块化程度较高;花卉和传粉昆虫功能多样性较高和系统发育多样性较高的群落,其嵌套程度较低。总之,海拔高度、物种多样性、功能多样性和网络结构的变化程度表明,环境对植物和传粉昆虫的功能和系统发育多样性以及网络结构产生了影响。我们的研究结果表明,气候变化对植物和传粉昆虫群落组成的影响将影响植物-传粉昆虫网络结构,并可能在群落尺度上影响传粉服务。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Floral and pollinator functional diversity mediate network structure along an elevational gradient

Floral and pollinator functional diversity mediate network structure along an elevational gradient

Elevational gradients in alpine ecosystems are well suited to study how plant and pollinator communities respond to climate change. In the Austrian Alps, we tested how the taxonomic and functional diversity of plants and their pollinators change with increasing elevation and how this affects plant–pollinator network structure. We measured the phenotypes of flowering plants and their pollinators and observed their interactions in 24 communities along an elevational gradient. To assess variation in floral and pollinator traits, we then quantified trait spaces (n-dimensional hypervolumes) occupied by flowers and pollinators in each community. To assess plant–pollinator network structure, we quantified the levels of complementary specialization (H2’), modularity and nestedness (weighted NODF) for each community. As elevation increased, most measures of diversity and network specialization either declined linearly or in an oscillating manner. Communities that exhibited higher pollinator functional diversity exhibited larger degrees of complementary specialization and modularity; and communities with greater floral and pollinator functional diversity and higher phylogenetic diversity were less nested. Altogether, the degree to which elevation, species diversity, functional diversity and network structure changed in conjunction suggests environmental effects on the functional and phylogenetic diversity of plants and pollinators and consequently network structure. Our results suggest that the effects of climate change on plant and pollinator community composition will impact plant–pollinator network structure and potentially pollination services at the community scale.

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来源期刊
Alpine Botany
Alpine Botany PLANT SCIENCES-
CiteScore
5.10
自引率
18.50%
发文量
15
审稿时长
>12 weeks
期刊介绍: Alpine Botany is an international journal providing a forum for plant science studies at high elevation with links to fungal and microbial ecology, including vegetation and flora of mountain regions worldwide.
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