当地栖息地和空间连通性对城市种子捕食的影响。

IF 2.4 2区 生物学 Q2 PLANT SCIENCES
Álvaro Gaytán, Laura J. A. van Dijk, Maria Faticov, Anna E. Barr, Ayco J. M. Tack
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引用次数: 0

摘要

前言:在过去的几个世纪中,城市景观覆盖的面积在世界各地不断增加。城市化会改变当地的栖息地,降低这些栖息地之间的连通性,从而对物种间的相互作用产生重要影响。虽然一些研究发现城市化对植物与昆虫之间的相互作用产生了重大影响,但城市化对种子捕食的影响在很大程度上仍未得到探讨:我们调查了 2018 年和 2020 年期间阳光照射、落叶和空间连通性对城市景观中飞蛾和象鼻虫幼虫捕食有梗橡子的相对影响。我们还研究了飞蛾和象鼻虫的侵袭是否相互独立:虽然不同树木之间的种子捕食差异很大,但种子捕食与阳光照射、落叶或空间连通性的差异无关。2018年,飞蛾和象鼻虫对种子的捕食在单个橡子水平上呈负相关,但在2020年,在橡子和树木水平上呈正相关:我们的研究设定了一个基本预期,即城市种子捕食者不受阳光照射、落叶和空间连通性差异的影响。总之,我们的研究结果表明,在城市环境中,地方和空间因素对昆虫的影响可能取决于物种的种类。了解地方和空间因素对生物多样性、食物网结构和生态系统功能的影响,可以为旨在促进城市昆虫多样性的城市规划和管理策略提供有价值的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

The effect of local habitat and spatial connectivity on urban seed predation

The effect of local habitat and spatial connectivity on urban seed predation

Premise

During the last centuries, the area covered by urban landscapes is increasing all over the world. Urbanization can change local habitats and decrease connectivity among these habitats, with important consequences for species interactions. While several studies have found a major imprint of urbanization on plant–insect interactions, the effects of urbanization on seed predation remain largely unexplored.

Methods

We investigated the relative impact of sunlight exposure, leaf litter, and spatial connectivity on predation by moth and weevil larvae on acorns of the pedunculate oak across an urban landscape during 2018 and 2020. We also examined whether infestations by moths and weevils were independent of each other.

Results

While seed predation varied strongly among trees, seed predation was not related to differences in sunlight exposure, leaf litter, or spatial connectivity. Seed predation by moths and weevils was negatively correlated at the level of individual acorns in 2018, but positively correlated at the acorn and the tree level in 2020.

Conclusions

Our study sets the baseline expectation that urban seed predators are unaffected by differences in sunlight exposure, leaf litter, and spatial connectivity. Overall, our findings suggest that the impact of local and spatial factors on insects within an urban context may depend on the species guild. Understanding the impact of local and spatial factors on biodiversity, food web structure, and ecosystem functioning can provide valuable insights for urban planning and management strategies aimed at promoting urban insect diversity.

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来源期刊
American Journal of Botany
American Journal of Botany 生物-植物科学
CiteScore
4.90
自引率
6.70%
发文量
171
审稿时长
3 months
期刊介绍: The American Journal of Botany (AJB), the flagship journal of the Botanical Society of America (BSA), publishes peer-reviewed, innovative, significant research of interest to a wide audience of plant scientists in all areas of plant biology (structure, function, development, diversity, genetics, evolution, systematics), all levels of organization (molecular to ecosystem), and all plant groups and allied organisms (cyanobacteria, algae, fungi, and lichens). AJB requires authors to frame their research questions and discuss their results in terms of major questions of plant biology. In general, papers that are too narrowly focused, purely descriptive, natural history, broad surveys, or that contain only preliminary data will not be considered.
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