在人类世 (Anthropocene) 遗传多样性丧失将在息地破坏结束后的很长一段时间内继续下去
Kristy S Mualim1,2,3, Jeffrey P Spence4, Clemens Weiß4,5
1Department of Plant Biology, Carnegie Institution for Science, Stanford, California, USA.
bioRxiv : the preprint server for biology
|November 1, 2024
概括
遗传多样性的丧失持续了数十年,即使在息地保护之后. 目前的保护工作不足以确保物种的生存.
科学领域:
- 人口遗传学 人口遗传学
- 保护生物学 保护生物学
- 生物多样性科学是生物多样性的科学.
背景情况:
- 遗传多样性对物种的适应能力至关重要,是全球生物多样性框架 (GBF) 的目标.
- 目前缺乏用于量化大规模遗传多样性丧失的预测框架.
- 了解息地丧失后的长期遗传多样性动态对于有效的保护至关重要.
研究的目的:
- 开发一个预测框架来量化在息地面积减少后遗传多样性丧失的数量.
- 在各种保护场景下预测未来的遗传多样性损失.
- 评估当前的息地保护战略是否足以维持遗传多样性.
主要方法:
- 综合时空人口遗传理论与来自18种植物和动物物种的种群基因组数据.
- 集成的预测模型,使用来自生物行星指数,红色名单和GBF指标的数据.
- 根据息地面积和种群动态,预计13,808种物种的遗传多样性丧失.
主要成果:
- 遗传多样性对息地面积和人口减少表现出缓慢但滞后的反应.
- 预计即使有充分的息地保护,遗传多样性也会显著丧失 (13-22%短期,42-48%长期).
- 息地碎片化显著影响遗传多样性丧失的程度.
结论:
- 仅仅保护当前的息地不足以维持物种的遗传健康.
- 持续的遗传监测可能低估了生物多样性丧失的长期影响.
- 基于区域的时空框架对于定量全球遗传生物多样性场景至关重要.
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