景观对森林雀形目(雀形目)后缘种群保护的影响:现状和前景

IF 1.5 4区 环境科学与生态学 Q3 BIODIVERSITY CONSERVATION
R. Hernández‐Lambraño, J. Tellería
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引用次数: 0

摘要

摘要景观变化影响物种丰富度并导致生物多样性丧失。在这里,我们探讨了栖息地数量和斑块聚集是否影响了西北古北界(摩洛哥)森林雀形目的丰度。由于该地区的森林受到日益严重的干旱和温度的影响,我们还根据目前对气候变化的预测预测了它们的趋势,并探讨了景观变化如何影响鸟类分布。我们记录了七种森林雀形目的地理参考事件,这些事件用Maxent的一组环境变量建模,以预测其分布。模型提供的发生概率被用作该国栖息地数量和斑块聚集的当前分布的替代品。此外,还使用了分布在该国境内的190条500米长的样带来估计当地鸟类的数量。结果表明,样带记录的鸟类丰度与样带周围景观的栖息地数量和斑块聚集呈正相关。这支持了这样一种观点,即这些景观指标的变化会影响研究物种的丰度。气候变化预测表明,南部地区的栖息地数量和斑块聚集将下降,但在海拔较高的地区将保持或增加。考虑到它们与丰度的关系,这些景观变化表明,森林鸟类将不得不转移到最北端和地势较高的地区。这些结果表明,景观管理可以在保护森林鸟类后缘种群方面发挥重要作用,并表明在全球变化的情况下,森林数量和连通性的任何增加都将提高鸟类的抵御能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Landscape effects on the conservation of rear-edge populations of forest passerines (Passeriformes): current patterns and prospects
Summary Landscape changes affect species abundance and drive biodiversity loss. Here we explored if habitat amount and patch aggregation shape the abundance of forest passerines within the south-western Palaearctic (Morocco). As forests in this region are affected by increasing drought and temperature, we also forecasted their trends according to current predictions of climate change and explored how landscape changes could affect bird distribution. We recorded geo-referenced occurrences of seven forest passerines that were modelled with a set of environmental variables with Maxent to predict their distribution. The occurrence probabilities provided by the models were used as surrogates for the current distribution of habitat amount and patch aggregation within the country. In addition, 190 500-m line transects scattered within the country were used to estimate local bird abundance. Results showed that bird abundance recorded in line transects was positively correlated with habitat amount and patch aggregation of landscape around transects. This supports the idea that changes in these landscape metrics affect the abundance of the study species. Climate-change projections suggest that habitat amount and patch aggregation will decline in southern sectors but will be maintained or will increase at higher elevations. Given their relationship to abundance, these landscape changes suggest that forest birds will have to shift to the northernmost and elevated sectors. These results showed that landscape management can play an important role in the conservation of rear-edge populations of forest birds and suggest that any increase in forest amount and connectivity will improve bird resilience under a global change scenario.
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来源期刊
CiteScore
3.40
自引率
6.20%
发文量
50
审稿时长
>12 weeks
期刊介绍: Bird Conservation International is a quarterly peer-reviewed journal that seeks to promote worldwide research and action for the conservation of birds and the habitats upon which they depend. The official journal of BirdLife International, it provides stimulating, international and up-to-date coverage of a broad range of conservation topics, using birds to illuminate wider issues of biodiversity, conservation and sustainable resource use. It publishes original papers and reviews, including targeted articles and recommendations by leading experts.
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