• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Pedobiologia >Relative strengths of relationships between plant, microbial, and environmental parameters in heavy-metal contaminated floodplain soil
【24h】

Relative strengths of relationships between plant, microbial, and environmental parameters in heavy-metal contaminated floodplain soil

机译：重金属污染洪泛区土壤中植物，微生物与环境参数之间关系的相对强度

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

We used a combination of sampling and statistical approaches to investigate the relative influence of metals, soil acidity, and organic matter on a suite of analogous plant and microbial community parameters in floodplain soils contaminated by mine wastes in the early twentieth century. We compared the sensitivity of plant and microbial communities to environmental variables and to one another using constrained ordination analyses. Environmental factors accounted for a larger percentage of the total variance in microbial communities (56.2%) than plant communities (22.0%). We also investigated biological and geochemical changes that occurred along a short transect (64. cm) that spanned a transition from productive grassland to an area of barren wasteland representing a total functional collapse of the grassland/soil ecosystem. Along this small-scale transect we quantified geochemical parameters and biological parameters in two soil layers, an upper layer (0-10. cm) and a lower layer (10-20. cm). Results from the short transect indicated that soil respiration was not a strong indicator of underlying metal concentrations, but soil acidity was correlated in the upper and lower layers. PLFA profiles changed with distance along the gradient in the upper, but not the lower layer. Implications for remediation of contaminated floodplain soils are discussed.
机译：我们采用采样和统计方法相结合的方法，研究了金属，土壤酸度和有机物对20世纪初受矿山废物污染的洪泛区土壤中一系列类似植物和微生物群落参数的相对影响。我们使用约束排序分析比较了植物和微生物群落对环境变量的敏感性以及彼此之间的敏感性。与植物群落（22.0％）相比，环境因子在微生物群落（56.2％）中占总变异的比例更大。我们还研究了沿短剖面（64. cm）发生的生物和地球化学变化，该剖面跨越了从生产性草原到贫瘠荒地的过渡，代表了草原/土壤生态系统的总体功能崩溃。沿着这个小规模的样带，我们量化了两个土壤层的上层（0-10。cm）和下层（10-20。cm）的地球化学参数和生物学参数。短横断面的结果表明，土壤呼吸不是潜在金属浓度的有力指标，但土壤酸度在上层和下层相关。 PLFA轮廓随上层（但下层）中渐变的距离而变化。讨论了对污染的洪泛区土壤进行修复的意义。

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