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Spatial Relationships among Soil Nutrients, Plant Biodiversity and Aboveground Biomass in the Inner Mongolia Grassland, China.

机译：内蒙古草原土壤养分，植物生物多样性与地上生物量之间的空间关系

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摘要

The relationship between biodiversity and ecosystem functioning (BEF) is a central issue in ecology, and a number of recent field experimental studies have greatly improved our understanding of this relationship. Spatial heterogeneity is a ubiquitous characterization of ecosystem processes, and has played a significant role in shaping BEF relationships. The first step towards understanding the effects of spatial heterogeneity on the BEF relationships is to quantify spatial heterogeneity characteristics of key variables of biodiversity and ecosystem functioning, and identify the spatial relationships among these variables. The goal of our research was to address the following research questions based on data collected in 2005 (corresponding to the year when the initial site background information was conducted) and in 2008 (corresponding to the year when removal treatments were conducted) from the Inner Mongolia Grassland Removal Experiment (IMGRE) located in northern China: 1) What are the spatial patterns of soil nutrients, plant biodiversity, and aboveground biomass in a natural grassland community of Inner Mongolia, China? How are they related spatially? and 2) How do removal treatments affect the spatial patterns of soil nutrients, plant biodiversity, and aboveground biomass? Is there any change for their spatial correlations after removal treatments? Our results showed that variables of biodiversity and ecosystem functioning in the natural grassland community would present different spatial patterns, and they would be spatially correlated to each other closely. Removal treatments had a significant effect on spatial structures and spatial correlations of variables, compared to those prior to the removal treatments. The differences in spatial pattern of plant and soil variables and their correlations before and after the biodiversity manipulation may not imply that the results from BEF experiments like IMGRE are invalid. However, they do suggest that the possible effects of spatial heterogeneity on the BEF relationships should be critically evaluated in future studies.
机译：生物多样性和生态系统功能（BEF）之间的关系是生态学中的一个中心问题，并且最近的一些野外实验研究大大提高了我们对这种关系的理解。空间异质性是生态系统过程的普遍表征，并且在塑造BEF关系方面发挥了重要作用。理解空间异质性对BEF关系的影响的第一步是量化生物多样性和生态系统功能关键变量的空间异质性特征，并确定这些变量之间的空间关系。我们的研究目标是基于2005年（对应于进行初始场地背景信息的年份）和2008年（对应于进行去除处理的年份）收集的数据来解决以下研究问题。位于中国北方的草地清除实验（IMGRE）：1）中国内蒙古的天然草地群落中土壤养分，植物生物多样性和地上生物量的空间格局是什么？它们在空间上如何关联？ 2）去除处理如何影响土壤养分，植物生物多样性和地上生物量的空间格局？去除处理后它们的空间相关性有变化吗？我们的结果表明，天然草地群落中生物多样性和生态系统功能的变量将呈现不同的空间格局，并且它们在空间上彼此紧密相关。与删除处理之前的处理相比，删除处理对变量的空间结构和空间相关性具有重大影响。在生物多样性操纵之前和之后，植物和土壤变量的空间格局差异及其相关性可能并不意味着像IMGRE这样的BEF实验结果是无效的。但是，他们确实建议在未来的研究中应严格评估空间异质性对BEF关系的可能影响。

著录项

  • 作者

    Yuan, Fei.;

  • 作者单位

    Arizona State University.;

  • 授予单位 Arizona State University.;
  • 学科 Biology Ecology.;Environmental Sciences.;Biogeochemistry.
  • 学位 M.S.
  • 年度 2011
  • 页码 120 p.
  • 总页数 120
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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