景观模式对全球范围内的植物物种多样性的影响
Hanni Jin1, Jing Xu1, Yu Peng1
1College of Life and Environmental Sciences, Minzu University of China, Beijing 100081, China.
The Science of the total environment
|July 5, 2023
概括
景观模式显著影响植物生物多样性,气候因素直接影响alpha-diversity,景观模式间接影响它. 平衡地块和景观结构是保持全球植物多样性的关键.
科学领域:
- 生态生态学 生态生态学
- 生物多样性研究 生物多样性研究
- 景观生态学 景观生态学
背景情况:
- 景观模式是生物多样性的关键驱动力,但由于研究方法的差异,它们的确切影响仍在争论中.
- 了解这些影响对于保护工作和预测生物多样性变化至关重要.
研究的目的:
- 调查景观模式对植物α和β多样性的直接和间接影响.
- 探索环境因素,空间尺度和植物功能特征的调解作用.
主要方法:
- 利用全球植物社区数据库和高分辨率的土地使用/土地覆盖地图 (1990-2017).
- 在补丁和景观层面计算了植物物种多样性 (alpha和beta) 和景观指标.
- 采用统计方法来辨别景观模式的直接和间接影响,考虑气候,空间特征和人类干扰.
主要成果:
- 气候因素对植物的α-多样性产生了主要的直接影响,通过补丁模式和功能特征进行介导.
- 景观模式主要对α-多样性有间接影响,而景观层面的模式对β-多样性有更直接的影响.
- 补丁和景观层面的图案表现出相反的效果,受到规模,构成和空间结构的影响.
- 植物对景观模式的适应涉及叶面积,高度和种子分散等特征的变化,因植被类型而异.
结论:
- 景观模式通过复杂的直接和间接途径影响植物多样性,这些途径在很大程度上受到环境因素和植物功能特征的介导.
- 平衡景观模式的不同空间尺度 (补丁与景观水平) 对于促进功能性特征变异至关重要.
- 保持全球植物多样性需要一个细微的方法,考虑景观结构,环境条件和植物适应之间的相互作用.
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