实验性变暖解了植物-真菌共生体相互作用,导致了更保守的生态系统
Lara Souza1,2, Aimée T Classen2,3, Jennifer A Rudgers2,4
1School of Biological Sciences, University of Oklahoma, Norman, OK 73019.
概括
气候变暖改变了亚山草原,植物从草本变为木质. 这种变暖改变了植物微生物相互作用,影响了生态系统功能和土壤特性.
科学领域:
- 生态生态学 生态生态学
- 气候变化生物学 气候变化生物学
- 植物土壤科学 植物土壤科学
背景情况:
- 气候变暖对预测生态系统反应提出了重大挑战.
- 植物与微生物之间的相互作用对于生态系统的运行至关重要,并且对环境变化很敏感.
- 亚阿尔卑斯山草原是脆弱的生态系统,面临着快速的温度上升.
研究的目的:
- 为了研究实验性变暖对亚山草原生态系统的长期影响.
- 了解变暖如何影响植被组成,植物功能特征和地下微生物群落.
- 评估这些变化对生态系统功能和植物微生物关联的后果.
主要方法:
- 利用最长期运行的气候变化实验之一,将29年的变暖应用于原生亚山草原.
- 对植被覆盖面的监测变化,包括灌木,草和草.
- 评估了植物功能特征的变化,并量化了与根相关的树状菌根菌,隔膜根菌和土壤食菌的变化.
主要成果:
- 气候变暖导致灌木占主导地位显著增加 (150%) 和草和草减少 (28%).
- 植物的功能特征转向更保守的策略 (20%的变化).
- 根相关的真菌殖民减少了17-20%,而土壤菌菌增加了10%.
结论:
- 变暖将地面和地下社区分离,并在亚山草原中发挥作用.
- 在变暖下观察到植物可用的的增加和对菌根真菌的依赖减少.
- 由于气候变暖,亚山草原预计将变得更加保守,在地表和地底的特征上变得更像沙漠灌木.
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