长期的草原多样性与生产率的关系受到中国北部管理制度的监管
Yingying Nie1, Lijun Xu1, Xiaoping Xin1
1State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, 12 Zhongguancun South Street, Beijing 100081, China.
The Science of the total environment
|July 29, 2024
概括
草原植物多样性对地面生物质 (AGB) 的影响不同,取决于管理. 落地草原显示负的AGB多样性,而放牧显示积极的AGB多样性,割草的频率因频率而异,影响生态系统服务.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 农业科学 农业科学
背景情况:
- 草原是关键的陆地生态系统,支持全球人类生活和可持续发展.
- 草原植物多样性与生产率之间的关系是一个长期存在的研究问题,结果受到争论.
研究的目的:
- 量化地面生物量 (AGB) 对不同草原管理制度下的植物物种多样性的反应.
- 为了调查变化的驱动因素多样性-生产力关系在退化的草原草.
主要方法:
- 利用了来自中国内蒙古退化草原草原的十年级实验数据.
- 采用协同变异分析 (ANCOVA) 模型来分析AGB和植物多样性之间的关系.
- 研究了不同管理实践 (空地,放牧,割草频率) 对这种关系的影响.
主要成果:
- 地上生物质 (AGB) 显示出对休草原植物多样性的负面反应.
- 在牧草草地,AGB对植物多样性的反应是积极的.
- 在割草草地中,AGB-多样性关系随着割草频率的增加而从负转为正.
结论:
- 物种组成的变化,特别是罕见和非罕见物种之间的生产力差距,推动了观察到的多样性-生产力关系.
- 草原管理在调节植物多样性和生产力之间的相互作用方面发挥着至关重要的作用.
- 结果为可持续的草原资源管理和利用提供了洞察力.
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