Effects of the control of an invasive tree on the structure of a plant-frugivore network.

IF 4.3 2区 环境科学与生态学 Q1 ECOLOGY
Brisa Marciniak, Nivaldo Peroni, Anna Traveset, Michele de Sá Dechoum
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引用次数: 0

Abstract

Invasive non-native species are one of the main causes of degradation of ecosystems worldwide. The control of invasive species is key to reducing threats to ecosystem viability in the long term. Observations of structural changes in ecological interaction networks following invasive species suppression can be useful to monitor the success of ecological restoration initiatives. We evaluated the structure of plant-bird frugivory interaction networks in a plant community invaded by the guava tree (Psidium guajava L.) by comparing network metrics before and after control actions. Psidium guajava was relevant in all metrics for the unmanaged network in this study, with high degree centrality and high nestedness contribution. Based on the asymmetry of species interactions, we found that birds were highly dependent on the invasive plant before suppression. Once P. guajava trees were eliminated, bird and plant species richness, total number of interactions, and modularity increased, whereas nestedness and interaction strength asymmetry decreased. The diet of the bird community became more diversified once P. guajava was no longer available and relevant species roles in community structure emerged. Our results corroborate the fact that ecological restoration interventions should include the control of non-native plant species that attract frugivorous animals in order to diversify plant-frugivore interactions and thus maintain biodiversity in natural ecosystems.

控制入侵树木对植物-食草动物网络结构的影响。
非本地物种入侵是造成全球生态系统退化的主要原因之一。从长远来看,控制入侵物种是减少生态系统生存威胁的关键。观察入侵物种被抑制后生态互动网络结构的变化有助于监测生态恢复措施的成功与否。我们通过比较控制行动前后的网络指标,评估了被番石榴树(Psidium guajava L.)入侵的植物群落中植物-鸟类俭食互动网络的结构。在本研究中,番石榴与未治理网络的所有指标都相关,具有高度中心性和高嵌套度贡献。根据物种相互作用的不对称性,我们发现鸟类在入侵植物被抑制之前高度依赖入侵植物。一旦番石榴树被清除,鸟类和植物的物种丰富度、相互作用总数和模块化程度都有所增加,而嵌套度和相互作用强度的不对称性则有所下降。瓜果树消失后,鸟类群落的食物变得更加多样化,群落结构中的相关物种角色也随之出现。我们的研究结果证实,生态恢复干预措施应包括控制吸引食俭动物的非本地植物物种,以使植物与食俭动物的相互作用多样化,从而维持自然生态系统的生物多样性。
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来源期刊
Ecological Applications
Ecological Applications 环境科学-环境科学
CiteScore
9.50
自引率
2.00%
发文量
268
审稿时长
6 months
期刊介绍: The pages of Ecological Applications are open to research and discussion papers that integrate ecological science and concepts with their application and implications. Of special interest are papers that develop the basic scientific principles on which environmental decision-making should rest, and those that discuss the application of ecological concepts to environmental problem solving, policy, and management. Papers that deal explicitly with policy matters are welcome. Interdisciplinary approaches are encouraged, as are short communications on emerging environmental challenges.
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