全球干旱地区的植物物种丰富性和生态系统多功能性
Fernando T Maestre1, José L Quero, Nicholas J Gotelli
1Área de Biodiversidad y Conservación, Departamento de Biología y Geología, Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, Calle Tulipán Sin Número, 28933 Móstoles, Spain. fernando.maestre@urjc.es
Science (New York, N.Y.)
|January 17, 2012
概括
生物多样性增强了生态系统的多功能性,维持了碳储存等重要功能. 保护植物物种丰富是缓冲气候变化和干旱地区荒漠化影响的关键.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 保护生物学 保护生物学
背景情况:
- 生物多样性较高的生态系统往往表现出增强的多功能性,支持碳储存和营养循环等关键功能.
- 自然环境中的生物多样性和生态系统多功能性之间的全球关系在很大程度上仍未得到评估.
- 干旱地区占地球陆地面积的41%,是支持大量人类人口和面临环境挑战的重要生态系统.
研究的目的:
- 全球评估植物物种丰富度与干旱地区生态系统多功能性之间的关系.
- 确定关键驱动因素,包括非生物因素,影响这些干旱环境中的多功能性.
- 为生物多样性在维持干旱生态系统功能中的作用提供经验证据.
主要方法:
- 进行了一项全球实证研究,分析了植物物种丰富性和非生物因素.
- 量化生态系统的多功能性在世界各地的各种干地生态系统.
- 利用统计建模来确定物种丰富,非生物因素和多功能性之间的关系.
主要成果:
- 在植物物种丰富度和生态系统多功能性之间发现了显著的积极关系.
- 在解释多功能性的模型中,物种丰富是一致的预测变量,占其变化的55%以上.
- 无生物因素也影响了多功能性,但物种丰富仍然是一个关键组成部分.
结论:
- 植物生物多样性,特别是物种丰富,是干旱地区生态系统多功能性的关键驱动因素.
- 保护植物生物多样性对于保持生态系统功能和对抗气候变化和荒漠化的弹性至关重要.
- 这些发现强调了生物多样性保护对全球干旱地区生态系统健康和服务的重要性.
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