Biochar produced from diverse invasive species improves remediation of cadmium-contaminated soils

IF 2.8 3区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Biological Invasions Pub Date : 2024-05-08 DOI:10.1007/s10530-024-03332-3
Xue Wang, Wei-Long Zheng, Hao-Ming Yuan, Mark van Kleunen, Fei-Hai Yu, Mai-He Li
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Abstract

Biodiversity commonly contributes to ecosystem functioning and provides ecosystem services. Biochar application is frequently used to remediate soils contaminated with heavy metals. As many invasive plant species can quickly form huge amounts of biomass, they are potentially useful for producing biochar for remediating contaminated soils. However, it remains untested whether invasive species richness contributes to biochar-mediated soil remediation. We applied single biochar made from each of six invasive plant species and biochar mixtures (i.e., mixtures of biochar derived from 2, 3, and 6 invasive plant species) to soils contaminated with cadmium (Cd), with no biochar application as the control. We then grew native plant communities on these soils. Compared to the control, biochar application significantly decreased Cd bioavailability (− 34% averaged across the three richness treatments) in the soils, and this effect increased with increasing invasive species richness involved in the biochar mixtures (from − 22 to − 38%). Biochar application significantly increased both the concentration (+ 126%) and pool size (+ 59%) of Cd in roots of the native plant community, although it significantly decreased its biomass (− 25%). Thus, invasive species diversity can contribute to biochar-mediated remediation of soils contaminated with Cd. Our findings indicate a novel biodiversity-mediated ecosystem service, i.e., the use of multiple invasive plant species for the production of biochar. As harvesting of invasive species for biochar production may also contribute to their management, this might mitigate the two ecological problems at once.

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用多种入侵物种生产的生物炭改善了镉污染土壤的修复效果
生物多样性通常有助于生态系统发挥作用并提供生态系统服务。生物炭的应用经常被用于修复受重金属污染的土壤。由于许多入侵植物物种能迅速形成大量生物质,因此它们有可能用于生产生物炭,以修复受污染的土壤。然而,入侵物种的丰富程度是否有助于生物炭介导的土壤修复,这一点仍有待检验。我们在受镉(Cd)污染的土壤中施用了由六种入侵植物物种和生物炭混合物(即由 2、3 和 6 种入侵植物物种制成的生物炭混合物)制成的单一生物炭,并以不施用生物炭作为对照。然后,我们在这些土壤上种植本地植物群落。与对照组相比,施用生物炭明显降低了土壤中镉的生物利用率(三种丰富度处理的平均值为-34%),而且随着生物炭混合物中入侵物种丰富度的增加(从-22%到-38%),这种效应也在增加。生物炭的施用大大增加了本地植物群落根部的镉浓度(+ 126%)和镉池大小(+ 59%),但却大大降低了其生物量(- 25%)。因此,入侵物种多样性有助于以生物炭为媒介修复受镉污染的土壤。我们的研究结果表明了一种新的以生物多样性为中介的生态系统服务,即利用多种入侵植物物种生产生物炭。由于收获入侵物种用于生产生物炭也有助于其管理,这可能会同时缓解两个生态问题。
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来源期刊
Biological Invasions
Biological Invasions 环境科学-生态学
CiteScore
6.00
自引率
6.90%
发文量
248
审稿时长
3 months
期刊介绍: Biological Invasions publishes research and synthesis papers on patterns and processes of biological invasions in terrestrial, freshwater, and marine (including brackish) ecosystems. Also of interest are scholarly papers on management and policy issues as they relate to conservation programs and the global amelioration or control of invasions. The journal will consider proposals for special issues resulting from conferences or workshops on invasions.There are no page charges to publish in this journal.
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