不同的植物和线虫社区对草原草原的长期缩的反应
Ruofei Lü1,2, Xingguo Han1,2,3, Raúl Ochoa-Hueso4,5
1State Key Laboratory of Forage Breeding-by-Design and Utilization; Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China.
概括
随着时间的推移,沉积会损害植物的多样性,但土壤线虫的多样性显示出弹性. 这项研究突出了草原草原中缩的地面和地下反应的对比.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 生物多样性研究 生物多样性研究
背景情况:
- 人类活动造成的 (N) 沉积威胁着全球生物多样性和生态系统功能.
- 地上和地下的社区是相互依赖的,但经常被孤立地研究.
- 这些社区对丰富的同步或异步反应尚不清楚.
研究的目的:
- 研究添加对地面植物和地下线虫多样性的长期影响.
- 为了比较植物和线虫生物多样性对丰富的时间和度依赖的反应.
- 了解在慢性沉积下对生态系统弹性的影响.
主要方法:
- 一个长达十年的添加实验,具有不同的N水平 (0-50 g N m−2年−1).
- 在2,6和10年评估植物和线虫多样性.
- 分析与含量和实验持续时间有关的多样性变化.
主要成果:
- 植物多样性逐渐下降,并因较高的N水平和较长的实验持续时间而加剧.
- 线虫多样性显示出值反应,在低N下降 (<10gNm-2年-1),然后稳定,没有显著的时间变化.
- 植物丰富性损失是由物种丧失驱动的,而线虫多样性的变化则涉及补偿物种的替代.
结论:
- 地上和地下的生物多样性对缩表现出异步的反应.
- 土壤线虫群体通过补偿周转表现出对沉积的弹性,可能缓冲生态系统生物多样性丧失.
- 对植物和土壤生物群的综合评估对于了解沉积对生态系统的影响至关重要.
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