灭绝驱动了最近的热友化,但并没有触发森林地下层的均质化
Jeremy Borderieux1, Jean-Claude Gégout2, Josep M Serra-Diaz2,3
1Université de Lorraine, AgroParisTech, INRAE, UMR Silva, Nancy, France. jeremy.borderieux@agroparistech.fr.
Nature ecology & evolution
|March 13, 2024
概括
气候变化导致植物群落倾向于更温暖的适应物种,但这项研究显示,适应寒冷的物种正在灭绝,而不是温暖的适应物种. 这种衰退会影响生物多样性,并延迟生物同质化.
科学领域:
- 生态生态学 生态生态学
- 气候变化生物学 气候变化生物学
- 植物社区动态 植物社区动态
背景情况:
- 气候变化正在推动植物群落的热化 (转向适应更温暖的物种).
- 热友化,生物同质化和底层的殖民/灭绝动态之间的关系尚未得到充分理解.
- 了解这些动态对于预测社区对快速环境变化的反应至关重要.
研究的目的:
- 研究植物群体热化和同质化之间的联系.
- 分析物种殖民和灭绝在十年气温上升的过程中推动这些变化的作用.
- 评估法国生态区域的森林地下植物群落的变化.
主要方法:
- 在10年内利用了80个法国森林生态区域的14,167个地块对.
- 计算的社区平均热最佳值 (热化) 和β-多样性的变化 (同质化).
- 分区的多样性转变为寒冷和温暖适应物种的灭绝和殖民动态.
主要成果:
- 森林地下层社区的平均热化率为每十年0.12°C,在温暖的地区达到每十年0.20°C.
- 这种热化仅仅是由适应寒冷的物种灭绝所驱动的.
- 虽然适应寒冷的物种灭绝促进了同质化,但它被罕见物种的殖民和常见物种的灭绝所抵消,从而否定了整体的同质化趋势.
结论:
- 观察到现有的适应寒冷的物种的衰退,而不是通过新适应温暖的物种的到来进行适应.
- 殖民化和灭绝动态对β-多样性产生了相互抵消的影响.
- 未来的生物多样性丧失和生物同质化的延迟开始被建议,需要仔细考虑保护策略.
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