生态区分和分布动力学揭示了中国属Dysosma的气候变化反应
Rui Chen1,2, Fangming Luo1,2, Weihao Yao1,2
1Guizhou Academy of Forestry, Guiyang 550005, China.
Plants (Basel, Switzerland)
|January 10, 2026
概括
气候变化影响了药用植物Dysosma的分布. 虽然息地在很大程度上保持稳定,但一些物种表现出脆弱性,需要针对性的保护策略,以实现可持续利用.
科学领域:
- 生态与保护生物学 生态与保护生物学
- 植物生物地理 植物生物地理
- 气候变化影响评估 气候变化影响评估
背景情况:
- 狄索斯马属 (Dysosma) 包含具有狭窄生态的药用植物,面临着息地退化和气候变化带来的威胁.
- 所有Dysosma物种都被列入中国国家关键保护野生植物名单 (二类),突出了它们的保护状况.
研究的目的:
- 在当前和未来的气候变化场景下调查七种Dysosma物种的潜在分布动态.
- 评估气候变化对Dysosma息地的稳定性,范围和空间位移的影响.
- 为维护和可持续利用Dysosma资源提供科学基础.
主要方法:
- 使用MaxEnt模型利用534个发生点和25个环境变量来预测潜在分布.
- 使用生态利基重叠指数 (Schoener's D) 和动态指标 (RCR,CI,SI,SDR) 来分析分布变化.
- 进行中心移动分析以追踪物种分布中心的变化.
主要成果:
- 息地适合性较高的地区集中在中国西南部;最寒冷月份的最低温度 (Bio6) 和平均日间温度范围 (Bio2) 是关键因素.
- 未来适合息地的总体稳定性高 (SI>97.89%),不同情景的变化:轻微波动 (SSP126),轻微扩张 (SSP245),中期扩张-晚期收缩 (SSP585).
- 该属内存在高度的利基差异化;Dysosma tsayuensis对紫外B辐射 (UVB) 具有独特的依赖性,而利基专家在高排放场景下表现出不同的迁移模式.
结论:
- Dysosma物种对气候变暖的反应不同,在高排放场景下,利基专家特别容易受到伤害.
- 这些发现支持有针对性的 in situ 和 ex situ 保护战略以及人口恢复努力的需要.
- 了解这些动态对于这些有价值的药用植物的可持续管理至关重要.
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