Asian knotweed’s impacts on soil chemistry and enzyme activities are higher in soils with low-nutrient status

IF 2 3区农林科学 Q3 ECOLOGY

Pedobiologia Pub Date : 2024-11-01 DOI:10.1016/j.pedobi.2024.151002

Fanny Dommanget , Estelle Forey , Matthieu Chauvat , Amandine Erktan , Camille Noûs , Léa Daniès , Coralie Chesseron , Nicolas Fanin

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引用次数: 0

Abstract

Invasive alien plants such as Reynoutria spp. can drastically affect the composition of plant communities. Yet, whether and how these species also affect soil physicochemical properties and microbial functioning is still an unresolved question in the literature. Using a space-for-time substitution approach comparing invaded to uninvaded adjacent plots, we estimated the impacts of Reynoutria on soil biochemistry across nine contrasted sites in France by measuring soil carbon content, nutrient availability and enzyme activities. Soil under Reynoutria displayed higher carbon, nitrogen and phosphorus contents but no differences were detected regarding enzyme activities between invaded and uninvaded sites. Moreover, the magnitude of Reynoutria’s effects differed depending on local conditions, with greater effects when total carbon and phosphorus-related enzymes were relatively low. These data highlight that changes in soil nutrient availability might be primarily due to direct effects of Reynoutria on soil properties and microbial functioning. Higher impacts were observed in soils with low-nutrient status, suggesting a ‘niche construction ability’ of Reynoutria. Our results underscore the necessity of considering the context-dependency of Reynoutria on soil biochemistry and highlight that the impact of alien species belowground functioning depends on initial soil conditions.

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亚洲结缕草对土壤化学和酶活性的影响在低养分土壤中更大

外来入侵植物（如雷诺苔属植物）会严重影响植物群落的组成。然而，这些物种是否以及如何影响土壤理化性质和微生物功能，在文献中仍是一个悬而未决的问题。我们采用空间-时间替代法，比较了被入侵和未被入侵的相邻地块，通过测量土壤碳含量、养分可用性和酶活性，估算了雷诺氏菌对法国九个不同地点的土壤生物化学的影响。雷诺苔属下的土壤碳、氮和磷含量较高，但在酶活性方面，受侵染地块与未受侵染地块没有发现差异。此外，雷诺特里亚的影响程度因当地条件而异，在总碳和磷相关酶含量相对较低时，影响程度更大。这些数据突出表明，土壤养分供应的变化可能主要是由于雷诺特里亚对土壤特性和微生物功能的直接影响。在低养分土壤中观察到的影响更大，这表明雷诺氏藻具有 "生态位构建能力"。我们的研究结果突出表明，有必要考虑雷诺氏藻对土壤生物化学的环境依赖性，并强调外来物种对地下功能的影响取决于最初的土壤条件。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Pedobiologia 环境科学-生态学

CiteScore

4.20

自引率

8.70%

发文量

审稿时长

64 days

期刊介绍： Pedobiologia publishes peer reviewed articles describing original work in the field of soil ecology, which includes the study of soil organisms and their interactions with factors in their biotic and abiotic environments. Analysis of biological structures, interactions, functions, and processes in soil is fundamental for understanding the dynamical nature of terrestrial ecosystems, a prerequisite for appropriate soil management. The scope of this journal consists of fundamental and applied aspects of soil ecology; key focal points include interactions among organisms in soil, organismal controls on soil processes, causes and consequences of soil biodiversity, and aboveground-belowground interactions. We publish: original research that tests clearly defined hypotheses addressing topics of current interest in soil ecology (including studies demonstrating nonsignificant effects); descriptions of novel methodological approaches, or evaluations of current approaches, that address a clear need in soil ecology research; innovative syntheses of the soil ecology literature, including metaanalyses, topical in depth reviews and short opinion/perspective pieces, and descriptions of original conceptual frameworks; and short notes reporting novel observations of ecological significance.