生物多样性对气候变化的决定性反应通过外来物种入侵
Pengdong Chen1,2, Changchao Shen1,3,4, Zhibin Tao1,3,4
1Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China.
Nature plants
|September 18, 2024
概括
全球气候变化威胁着生物多样性. 外来物种可能会加剧这种情况,但它们对本地物种的相对影响尚不清楚. 这项研究预测,在未来的变暖下,特别是长江河谷,入侵的数量将增加.
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
- 侵入性物种研究 侵入性物种研究
背景情况:
- 全球气候变化是生物多样性丧失的主要驱动因素,导致当地灭绝.
- 直接气候影响对本地物种的相对贡献与对外来物种影响增加的相对贡献尚未得到充分理解.
- 了解这些动态对于预测未来生物多样性轨迹至关重要.
研究的目的:
- 研究异国植物物种在区域生物多样性对全球气候变化的生态反应中的作用.
- 为了比较本地和外来物种的气候.
- 预测未来气候变化对入侵强度和原生多样性的影响.
主要方法:
- 对长江河谷142个植物物种的全球发生记录的分析.
- 本地和外来物种之间的气候的比较.
- 在一条长达1800公里的横断线沿着459个地块进行了实地调查,以评估入侵的强度和本土的多样性.
- 基于气候利基差异和未来气候场景预测入侵强度的建模.
主要成果:
- 外来物种占据着不同的气候,相比本土物种更喜欢温暖,干燥和更热带的条件.
- 气候的利基差异,特别是温度,准确地预测了横跨长江河谷横断的入侵强度.
- 预计未来的变暖将增加入侵的强度,特别是在较冷的地点.
- 变暖对本土生物多样性的直接负面影响大于通过入侵的间接影响.
- 发现中等程度的入侵会增加整个社区的物种多样性.
结论:
- 异国物种在区域生物多样性对气候变化的反应方面发挥着重要作用.
- 未来的气候变化可能会促进更强烈的入侵,改变本土社区.
- 虽然入侵可能会对本土的多样性产生负面影响,但中等水平可能会提高整体物种丰富度.
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