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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Resilience and stability in bird guilds across tropical countryside
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Resilience and stability in bird guilds across tropical countryside

机译：热带乡村地区鸟类协会的复原力和稳定性

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摘要

The consequences of biodiversity decline in intensified agricultural landscapes hinge on surviving biotic assemblages. Maintaining crucial ecosystem processes and services requires resilience to natural and anthropogenic disturbances. However, the resilience and stability of surviving biological communities remain poorly quantified. From a 10-y dataset comprising 2,880 bird censuses across a land-use gradient, we present three key findings concerning the resilience and stability of Costa Rican bird communities. First, seed dispersing, insect eating, and pollinating guilds were more resilient to low-intensity land use than high-intensity land use. Compared with forest assemblages, bird abundance, species richness, and diversity were all ~15% lower in low-intensity land use and ~50% lower in high-intensity land use. Second, patterns in species richness generally correlated with patterns in stability: guilds exhibited less variation in abundance in low-intensity land use than in high-intensity land use. Finally, interspecific differences in reaction to environmental change (response diversity) and possibly the portfolio effect, but not negative covariance of species abundances, conferred resilience and stability. These findings point to the changes needed in agricultural production practices in the tropics to better sustain bird communities and, possibly, the functional and service roles that they play.
机译：在集约化农业景观中生物多样性减少的后果取决于生存的生物组合。维持关键的生态系统过程和服务需要抵御自然和人为干扰。但是，幸存的生物群落的复原力和稳定性仍然很难量化。从包括2088个鸟类普查的10年数据集（跨土地利用梯度）得出的三个主要发现涉及哥斯达黎加鸟类群落的复原力和稳定性。首先，种子散布，昆虫食和授粉行会对低强度土地利用的抵抗力强于高强度土地利用。与森林组合相比，低强度土地利用中鸟类的丰度，物种丰富度和多样性均降低了约15％，高强度土地利用中的降低了约50％。第二，物种丰富度的模式通常与稳定性的模式相关：与高强度土地利用相比，低强度土地利用的行会在丰度上的变化较小。最后，对环境变化的反应之间的种间差异（响应多样性）以及可能的投资组合效应，但物种丰度的负协方差，赋予的复原力和稳定性则不然。这些发现表明，为了更好地维持鸟类群落以及可能发挥的功能和服务作用，热带地区的农业生产实践需要发生变化。

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