土地利用变化的强烈变化对热带鸟类的基因多样性产生影响 生态区域之间的基因多样性 强调需要采样大型空间尺度的需要
Giovanny Pérez1,2, Simon C Mills1,3, Jacob B Socolar4,5
1Ecology and Evolutionary Biology, School of Biosciences, University of Sheffield, Sheffield, UK.
Global change biology
|January 28, 2026
概括
为了农业的森林砍伐导致热带鸟类的大量遗传多样性丧失. 国家规模的评估至关重要,因为区域研究可能低估了生物多样性丧失的全部影响.
科学领域:
- 生态生态学 生态生态学
- 保护生物学 保护生物学
- 生物多样性研究 生物多样性研究
背景情况:
- 农业热带森林砍伐是生物多样性丧失的主要驱动力.
- 空间尺度影响土地利用变化对生物多样性的影响,更广泛的尺度显示出更大的影响.
- 遗传多样性 (PD) 对于保护至关重要,但其与森林砍伐的规模仍然不清楚.
研究的目的:
- 在多个空间尺度上量化由于为畜牧业砍伐森林而导致的植物遗传多样性 (PD) 的变化.
- 评估森林砍伐如何影响哥伦比亚的鸟类群落和进化历史.
- 确定空间尺度对PD损失和进化特征的影响.
主要方法:
- 编制了来自哥伦比亚13个受森林砍伐影响的不同地区的大型现场数据库.
- 利用占用模型来估计森林和牧场息地中的鸟类群体 (1547 种).
- 在PD指标的量化变化和在区域和国家规模的进化特征.
主要成果:
- 在全国范围内,观察到平均2300 Myr的遗传多样性损失.
- 大多数鸟类物种由于息地丧失而经历了全系的负面影响.
- 区域范围的PD损失与平均更广泛的PD损失相当,但具有很高的可变性,特别是在进化特征方面.
结论:
- 为了了解森林砍伐造成的生物多样性丧失的全部范围,国家范围的评估至关重要.
- 在PD损失的区域变化凸显了在保护规划中需要多区域采样.
- 需要采取紧急的保护行动,以保护独特的物种,并防止由农业扩张驱动的基因统一.
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