周期性作为北美森林的资源脉冲
1Center for Population Biology, Section of Evolution and Ecology, University of California, One Shields Avenue, Davis, CA 95616, USA. lhyang@ucdavis.edu
Science (New York, N.Y.)
|November 30, 2004
概括
周期性 (Magicicada spp.) 是一种常见的植物. 紧急情况充当资源脉冲,促进土壤微生物和. 这增强了森林植物的生长和繁殖,揭示了强大的地面和地下生态系统联系.
科学领域:
- 生态生态学 生态生态学
- 土壤科学 土壤科学
- 生态系统动力学 生态系统动力学
背景情况:
- 资源脉冲,以短暂的过剩为特征,对生态系统产生重大影响.
- 虽然地面上消费者对资源脉冲的反应得到了充分记录,但地下的后果仍未得到充分研究.
- 了解这些地下影响对于全面了解生态系统功能至关重要.
研究的目的:
- 为了研究周期性 (Magicicada spp.) 的地下影响. 北美森林生态系统中的资源脉冲.
- 为了确定虫脉冲对土壤微生物生物质和含量的直接影响.
- 评估这些豆类对森林植物生长和繁殖的间接影响.
主要方法:
- 实地研究监测土壤微生物生物质和动态,定期出现虫突发事件后.
- 量化土壤营养物质可用性和微生物活性的变化.
- 评估森林植物生长参数和繁殖成功,以应对改变的土壤条件.
主要成果:
- 周期性的资源脉冲直接增加了土壤微生物生物量.
- 在森林土壤中观察到气可用性的显著增加.
- 记录了与改善土壤条件相关的对森林植物生长和繁殖的间接积极影响.
结论:
- 周期性虫突发事件作为重要的资源脉冲而起作用,具有实质性的地下影响.
- 这些脉冲在森林生态系统中启动了"自下而上的布",将地表昆虫动态与地下土壤过程联系起来.
- 在北美森林中,地表和地下成分之间存在强烈的互动,由资源脉冲介导.
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