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首页> 外文期刊>Soil Science Society of America Journal >Simultaneous Loss of Soil Biodiversity and Functions along a Copper Contamination Gradient: When Soil Goes to Sleep
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Simultaneous Loss of Soil Biodiversity and Functions along a Copper Contamination Gradient: When Soil Goes to Sleep

机译：铜污染梯度下土壤生物多样性和功能的同时丧失：土壤入睡

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摘要

The impact of biodiversity loss on soil functions is well established via laboratory experiments that generally consider soil biota groups in isolation from each other, a condition rarely present in field soils. As a result, our knowledge about anthropogenic-induced changes in biodiversity and associated soil functions is limited. We quantified an array of soil biological constituents (plants, earthworms, nematodes, bacteria, and fungi) to explore their interactions and to characterize their influence on various soil functions (habitat for soil organisms, air and water regulation, and recycling of nutrients and organic waste) along a legacy Cu pollution gradient. Increasing Cu concentrations had a detrimental impact on both plant growth and species richness. Belowground soil biota showed similar responses, with their sensitivity to elevated Cu concentrations decreasing in the order: earthworms > bacteria > nematodes > fungi. The observed loss of soil biota adversely affected natural soil bioturbation, aggregate formation and stabilization, and decomposition and mineralization processes and therefore resulted in compacted soil with narrow pore size distributions and overall smaller pores, restricted air and water storage and flow, and impeded C, N, and P cycling. The simultaneous evolution of soil biodiversity and functions along the Cu gradient emphasized the key role of soil life in controlling ecosystem services. Furthermore, results indicated that different soil biodiversity and functional indicators started to decline (10% loss) within a Cu concentration range of 110 to 800 mg total Cu kg(-1).
机译：生物多样性丧失对土壤功能的影响已通过实验室实验得到了充分证实，该实验室实验通常将土壤生物群彼此隔离，这在田间土壤中很少出现。结果，我们对人为引起的生物多样性变化和相关土壤功能的了解有限。我们对一系列土壤生物成分（植物，earth，线虫，细菌和真菌）进行了定量分析，以探讨它们之间的相互作用并描述其对各种土壤功能（土壤生物的栖息地，空气和水的调节以及养分和有机物的循环利用）的影响。废物）沿传统的铜污染梯度发展。铜含量的增加对植物生长和物种丰富度都具有不利影响。地下土壤生物区系表现出相似的响应，对高浓度铜的敏感性依次降低：earth>细菌>线虫>真菌。观测到的土壤生物区系丧失对自然土壤生物扰动，聚集体形成和稳定化以及分解和矿化过程产生不利影响，因此导致土壤致密化，孔隙尺寸分布狭窄且总体上孔隙较小，空气和水的储存和流动受到限制，并阻碍了碳， N和P循环。土壤生物多样性和Cu梯度沿功能的同时演化强调了土壤生命在控制生态系统服务中的关键作用。此外，结果表明，在总Cu kg（-1）的Cu浓度范围内，不同的土壤生物多样性和功能指标开始下降（损失10％）。

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