...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Soil animals alter plant litter diversity effects on decomposition.
【24h】

Soil animals alter plant litter diversity effects on decomposition.

机译：土壤动物改变了植物凋落物多样性对分解的影响。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Most of the terrestrial net primary production enters the decomposer system as dead organic matter, and the subsequent recycling of C and nutrients are key processes for the functioning of ecosystems and the delivery of ecosystem goods and services. Although climatic and substrate quality controls are reasonably well understood, the functional role of biodiversity for biogeochemical cycles remains elusive. Here we ask how altering litter species diversity affects species-specific decomposition rates and whether large litter-feeding soil animals control the litter diversity-function relationship in a temperate forest ecosystem. We found that decomposition of a given litter species changed greatly in the presence of litters from other cooccurring species despite unaltered climatic conditions and litter chemistry. Most importantly, soil fauna determined the magnitude and direction of litter diversity effects. Our data show that litter species richness and soil fauna interactively determine rates of decomposition in a temperate forest, suggesting a combination of bottom-up and top-down controls of litter diversity effects on ecosystem C and nutrient cycling. These results provide evidence that, in ecosystems supporting a well developed soil macrofauna community, animal activity plays a fundamental role for altered decomposition in response to changing litter diversity, which in turn has important implications for biogeochemical cycles and the long-term functioning of ecosystems with ongoing biodiversity loss.
机译：大部分陆地净初级生产都以死有机物的形式进入分解系统，随后碳和养分的循环利用是生态系统功能以及生态系统商品和服务交付的关键过程。尽管对气候和基质质量控制的理解是相当了解的，但是生物多样性在生物地球化学循环中的功能作用仍然难以捉摸。在这里，我们询问改变凋落物物种多样性如何影响特定物种的分解速率，以及在温带森林生态系统中，以凋落物为食的大型土壤动物是否控制着凋落物多样性与功能的关系。我们发现，尽管气候条件和垫料化学性质未发生变化，但存在其他同生物种垫料时，给定垫料种类的分解发生了很大变化。最重要的是，土壤动物决定了凋落物多样性影响的程度和方向。我们的数据表明，在温带森林中，凋落物物种的丰富性和土壤动物群相互作用决定了分解的速率，表明自下而上和自上而下控制凋落物多样性对生态系统C和养分循环的影响。这些结果提供了证据，在支持发达的土壤大型动物群落的生态系统中，动物活动对分解的变化起着根本作用，以应对凋落物多样性的变化，进而对生物地球化学循环和生态系统的长期功能具有重要意义。持续的生物多样性丧失。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号