景观多样性对规范差异植被指数在空间尺度上的时间稳定性的影响
Zhiqiang Xiang1, Junfeng Lu2, Xi Zhou1
1College of Ecology, State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Lanzhou University, Lanzhou, 730000, Gansu, China.
Oecologia
|January 16, 2026
概括
景观多样性增强了跨空间尺度的生态系统稳定性,但降水稳定性是关键. 这项研究为景观保护和生态系统管理提供了洞察力.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
背景情况:
- 生态系统的稳定性对于预测环境变化影响至关重要.
- 景观多样性 (土地覆盖的异质性) 对稳定的影响是规模依赖的.
- 了解这些关系有助于制定保护策略.
研究的目的:
- 量化景观多样性对生态系统时间稳定性,耐力和弹性的规模依赖.
- 分析青海-西高原的空间尺度 (0.06252500公里2) 的影响.
- 研究气候因素 (温度,降水) 在调解这些关系中的作用.
主要方法:
- 使用卫星衍生的规范差异植被指数 (NDVI) 时间序列 (20002020).
- 在四种植被类型中评估了NDVI的时间稳定性,抗性和弹性.
- 在匹配的空间尺度下计算生长季节温度和降水的时间稳定性.
主要成果:
- 景观的多样性和NDVI的时间稳定性随着空间规模的增加而增加.
- 阻力和弹性没有显示出一致的规模依赖.
- 降水稳定性介导了景观多样性和NDVI时间稳定性之间的关系,在植被类型和尺度上产生不同的影响.
结论:
- 降水稳定性是景观多样性对生态系统时间稳定性影响的关键调节器.
- 这些发现通过结合规模依赖机制和气候媒介来扩展多样性-稳定性理论.
- 为环境变化下的景观规模保护和生态系统管理提供指导.
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