Road-River Intersections (Bridges) Negatively Affect Plant Species Diversity and Ecological Attributes

IF 2 3区环境科学与生态学 Q3 ECOLOGY

Applied Vegetation Science Pub Date : 2025-01-23 DOI:10.1111/avsc.70011

Erica Rievrs Borges, Eduardo González-Sargas, Nicolas Casajus, Marta Carboni, David Bauman, Guillaume Fried, Lindsay Maskell, Alejandro Juarez Escario, Anne-Marie Planty-Tabacchi, Eric Tabacchi

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Abstract

Question

Linear habitats are terrestrial and aquatic corridors that can be natural or anthropogenic. Here we asked: how does the intersection of two types of linear habitats (roads and rivers) affect plant species diversity, composition and ecological attributes?

Location

Southern France.

Methods

We studied road-river intersections (bridges) to test how composition, alpha and beta diversity, and ecological preferences of species in both roadside and riverside plant communities responded to the influence of bridges. We also used spatial predictors (spatial eigenvector maps) to assess whether bridges influenced directional spatial processes (upstream-downstream river axis) structuring community composition.

Results

We showed that vegetation around bridges differed from that away from bridges in terms of species composition and ecological preferences, and reduced alpha and beta diversities. We also found a convergence of species' ecological preferences in plant communities of rivers and roads at bridges. The turnover component of species beta diversity was lower at bridges, presumably due to different disturbance regimes, leading to biotic homogenization. However, our results show that the impact of bridges on directional spatial processes affecting species composition was negligible.

Conclusion

The strong effect of bridges as selecting forces of plant communities for both rivers and roads suggests bridges should not be overlooked. Our findings will help the development of more effective management of both types of linear habitats for the conservation of the plant species they host and the associated ecological functions and ecosystem services they provide.

Abstract Image

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道路-河流交叉路口（桥梁）对植物物种多样性和生态属性有负面影响

线性栖息地是陆地和水生走廊，可以是自然的或人为的。我们的问题是：两种线性生境（道路和河流）的交集如何影响植物物种多样性、组成和生态属性？地点：法国南部。方法以道路-河流交叉路口（桥梁）为研究对象，研究道路和河流植物群落的物种组成、α和β多样性以及生态偏好对桥梁影响的响应。我们还使用空间预测因子（空间特征向量图）来评估桥梁是否影响定向空间过程（上游-下游河流轴）结构群落组成。结果桥周植被与桥外植被在物种组成和生态偏好方面存在差异，α和β多样性有所降低。河流植物群落和桥梁道路植物群落的物种生态偏好也存在趋同现象。物种β多样性的周转成分在桥梁处较低，可能是由于不同的干扰制度，导致生物同质化。然而，我们的研究结果表明，桥梁对影响物种组成的定向空间过程的影响可以忽略不计。结论桥梁作为河流和道路植物群落的强大选择力，不容忽视。我们的研究结果将有助于对这两种类型的线性栖息地进行更有效的管理，以保护它们所寄生的植物物种以及它们提供的相关生态功能和生态系统服务。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Vegetation Science 环境科学-林学

CiteScore

6.00

自引率

10.70%

发文量

审稿时长

3 months

期刊介绍： Applied Vegetation Science focuses on community-level topics relevant to human interaction with vegetation, including global change, nature conservation, nature management, restoration of plant communities and of natural habitats, and the planning of semi-natural and urban landscapes. Vegetation survey, modelling and remote-sensing applications are welcome. Papers on vegetation science which do not fit to this scope (do not have an applied aspect and are not vegetation survey) should be directed to our associate journal, the Journal of Vegetation Science. Both journals publish papers on the ecology of a single species only if it plays a key role in structuring plant communities.