Macrophyte removal affects nutrient uptake and metabolism in lowland streams

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-07-17 DOI:10.1016/j.aquabot.2023.103694

Ada Pastor , Cecilie M.H. Holmboe , Olatz Pereda , Pau Giménez-Grau , Annette Baattrup-Pedersen , Tenna Riis

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引用次数: 1

Abstract

Macrophytes provide essential ecosystem services in lowland streams, including nutrient uptake that can reduce downstream transport to vulnerable coastal areas. Despite that, to ensure water conveyance and effective run off from agricultural fields, aquatic plant biomass is removed regularly in many European streams (i.e. weed cutting practices). However, the impacts of weed cutting on stream ecosystem processes are not yet well documented. Here, we studied the effect of weed cutting on nutrient retention and ecosystem metabolism in three lowland streams with contrasting dominant vegetation communities (submergent and emergent plants) during summer in Denmark. Our results showed a decrease in nutrient retention; uptake velocity of ammonium decreased 34–77 % and of phosphate decreased 50–77 %. Ecosystem metabolic rates also decreased after weed cutting, both in gross primary production (9 %, 60 % and 85 %) and respiration (47 %, 69 % and 76 %). The effects of weed cutting on these ecosystem processes prevailed three weeks after the cutting occurred. Understanding the effects of weed cutting on stream ecosystem functioning can improve nature-based management strategies to control eutrophication of downstream coastal areas.

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去除大型植物会影响低地溪流的营养吸收和代谢

大型植物在低地溪流中提供必要的生态系统服务，包括营养吸收，可以减少向脆弱沿海地区的下游运输。尽管如此，为了确保水的输送和农田的有效径流，在许多欧洲河流中定期清除水生植物生物量(即除草做法)。然而，除草对河流生态系统过程的影响还没有很好的文献记载。本研究以丹麦为研究对象，研究了夏季刈割杂草对3条低地河流养分保留和生态系统代谢的影响，这些河流具有不同的优势植被群落(淹没植物和新兴植物)。我们的研究结果显示营养潴留减少;铵的吸收速度下降34 - 77%，磷酸盐的吸收速度下降50 - 77%。除草后生态系统代谢率也有所下降，包括总初级产量(9%、60%和85%)和呼吸(47%、69%和76%)。除草对这些生态系统过程的影响在除草发生3周后占主导地位。了解除草对河流生态系统功能的影响可以改进基于自然的管理策略，以控制下游沿海地区的富营养化。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.