Effects of plant leaf traits, abundance and phylogeny on differentiation of herbivorous insect assemblages in Mediterranean mixed forest

IF 2.6 2区 农林科学 Q1 FORESTRY European Journal of Forest Research Pub Date : 2024-04-02 DOI:10.1007/s10342-024-01676-y
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Abstract

Herbivorous insect assemblages are functionally diverse, with each species exploiting plant tissues in different ways. Availability and palatability of plant tissues influence the diversity and composition of herbivorous insect assemblages. However, few studies have compared herbivorous insect assemblages and their ecological correlates across multiple plant species within the same plant community. Here, we sampled insect assemblages from the canopies of 1060 plants belonging to 36 woody species in two mixed Mediterranean forest stands. 401 insect species were classified as herbivores and grouped into sucker or chewer guilds. We explored differences in the diversity and composition of each insect guild across plant species, and tested their relationships with plant leaf traits, abundance or phylogeny, and explored whether the structures of plant-herbivorous insect networks depended on any of the studied plant traits. Plant identity accounted for the highest proportion of variation in the composition of each insect guild. Plant species abundance showed a positive effect on both insect guilds’ diversity. Suckers’ diversity was higher in plant species with deciduous leaves and low SLA, while the composition was more similar between phylogenetically closer plant species. Chewers diversity increased with the leaf area, while plants with similar LA, leaf nitrogen, SLA and distinct leaf habit showed more similar assemblages. Similarly, closely related angiosperms showed similar chewer assemblages. Plant–insect interaction networks present a modular structure, in which plants belonging to the same module tend to be related and share more sucker species. We add to the evidence supporting the role of plant species features as filters for structuring their associated herbivore insect assemblages.

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地中海混交林中植物叶片特征、丰度和系统发育对食草昆虫群分化的影响
摘要 食草昆虫群的功能多种多样,每个物种以不同的方式利用植物组织。植物组织的可获得性和适口性影响着食草昆虫群的多样性和组成。然而,很少有研究对同一植物群落中多个植物物种的草食性昆虫群落及其生态相关性进行比较。在这里,我们对两个地中海混交林中 36 个木本物种的 1060 种植物的树冠上的昆虫群进行了取样。401 种昆虫被归类为食草动物,并分为吸食者和咀嚼者类群。我们探讨了不同植物物种中各昆虫类群多样性和组成的差异,检验了它们与植物叶片性状、丰度或系统发育的关系,并探讨了植物食草昆虫网络结构是否取决于所研究的任何植物性状。植物特征在各昆虫类群组成的变化中所占比例最高。植物物种丰度对两个昆虫类群的多样性都有积极影响。在落叶和低 SLA 的植物物种中,吸虫的多样性较高,而在系统发育较近的植物物种中,吸虫的组成更为相似。咀嚼昆虫的多样性随着叶面积的增加而增加,而具有相似 LA、叶氮、SLA 和不同叶片习性的植物则表现出更相似的昆虫群。同样,亲缘关系较近的被子植物也表现出相似的咀嚼者组合。植物与昆虫的相互作用网络呈现出一种模块化结构,属于同一模块的植物往往具有亲缘关系,并分享更多的吸虫物种。我们的研究为支持植物物种特征在构建相关食草昆虫群落中的过滤作用提供了更多证据。
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来源期刊
CiteScore
5.10
自引率
3.60%
发文量
77
审稿时长
6-16 weeks
期刊介绍: The European Journal of Forest Research focuses on publishing innovative results of empirical or model-oriented studies which contribute to the development of broad principles underlying forest ecosystems, their functions and services. Papers which exclusively report methods, models, techniques or case studies are beyond the scope of the journal, while papers on studies at the molecular or cellular level will be considered where they address the relevance of their results to the understanding of ecosystem structure and function. Papers relating to forest operations and forest engineering will be considered if they are tailored within a forest ecosystem context.
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