Context

Anthropogenic land use and cover changes impact biodiversity worldwide. However, ecological groups are differently affected by landscape composition and configuration. Understanding which groups are negatively affected and which thrive in human-modified landscapes is of paramount importance for conservation management, especially for species such as the frugivorous birds, which play an essential role in seed dispersal.

Objectives

We evaluated the relative importance of landscape composition and configuration, explaining taxonomic and functional diversity and their effects on frugivorous birds in the Brazilian Atlantic Forest.

Methods

We used a robust dataset encompassing 153 forest fragments in the Atlantic Forest hotspot. We classified species as frugivores based on the percentage of fruits in the diet, and used functional traits related to seed dispersal to measure functional diversity.

Results

Our results showed that landscape composition was more important than landscape configuration explaining taxonomic and functional diversity of frugivorous birds. In addition, the interaction between landscape composition and configuration explained the loss of functional traits.

Conclusions

We demonstrate a disproportional importance of landscape composition explaining taxonomic and functional diversity of frugivorous birds, whereas the traits related to seed dispersal were explained by both compositional and configurational variables. Thus, we highlighted the need to maintain high habitat amount to increase taxonomic and functional diversity of frugivorous birds. However, the interaction of landscape composition and configuration is of paramount importance to sustain functional traits of frugivores in tropical forest landscapes.

中文翻译：

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景观构成是热带食果鸟类分类和功能多样性的主要驱动力

语境

人为土地利用和覆盖变化影响全球生物多样性。然而，生态群体受到景观组成和配置的不同影响。了解哪些群体受到负面影响以及哪些群体在人类改造的景观中茁壮成长对于保护管理至关重要，特别是对于食果鸟类等物种而言，它们在种子传播中发挥着重要作用。

目标

我们评估了景观组成和配置的相对重要性，解释了分类和功能多样性及其对巴西大西洋森林食果鸟类的影响。

方法

我们使用了一个强大的数据集，其中包含大西洋森林热点中的 153 个森林片段。我们根据饮食中水果的百分比将物种分类为食果动物，并使用与种子传播相关的功能性状来衡量功能多样性。

结果

我们的研究结果表明，景观构成比景观配置更重要，可以解释食果鸟类的分类和功能多样性。此外，景观构成和配置之间的相互作用解释了功能特征的丧失。

结论

我们证明了景观组成对解释食果鸟类分类和功能多样性的不成比例的重要性，而与种子传播相关的特征则由组成和配置变量来解释。因此，我们强调需要保持高栖息地数量，以增加食果鸟类的分类和功能多样性。然而，景观组成和配置的相互作用对于维持热带森林景观中食果动物的功能特征至关重要。