Distinct impacts of microplastics on the carbon sequestration capacity of coastal blue carbon ecosystems: A case of seagrass beds.

IF 3 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Marine environmental research Pub Date : 2024-10-21 DOI:10.1016/j.marenvres.2024.106793
Xin Hou, Changjun Li, Yong Zhao, Yike He, Wentao Li, Xiaotong Wang, Xianhua Liu
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Abstract

Seagrass beds, as an important coastal blue carbon ecosystem, are excellent at storing organic carbon and mitigating the impacts of global climate change. However, seagrass beds are under threat due to increased human activities and ubiquitous presence of microplastics (MPs) in marine environments. Bibliometric analysis shows that the distribution and accumulation of microplastics in seagrass beds has been widely documented worldwide, but their impacts on seagrass beds, particularly on carbon sequestration capacity, have not been given sufficient attention. This review aims to outline the potential impacts of MPs on the carbon sequestration capacity of seagrass ecosystems across five key aspects: (1) MPs act as sources of organic carbon, contributing to direct pollution in seagrass ecosystems; (2) Impacts of MPs on seagrasses and their epiphytic algae, affecting plant growth and net primary productivity; (3) Impacts of MPs on microorganisms, influencing production of recalcitrant dissolved organic carbon and greenhouse gas; (4) Impacts of MPs on seagrass sediments, altering the quality, structure, properties and decomposition processes of plant litters; (5) Other complex impacts on the seagrass ecosystems, depending on different behaviors of MPs. Latest progress in these fields are summarized and recommendations for future work are discussed. This review can provide valuable insights to facilitate future multidisciplinary investigations and encourage society-wide implementation of effective conservation measures to enhance the carbon sequestration capacity of seagrass beds.

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微塑料对沿海蓝碳生态系统固碳能力的不同影响:以海草床为例。
海草床作为重要的沿海蓝碳生态系统,在储存有机碳和减缓全球气候变化的影响方面表现出色。然而,由于人类活动的增加和海洋环境中微塑料(MPs)的普遍存在,海草床正受到威胁。文献计量分析表明,微塑料在海草床中的分布和积累已在全球范围内得到广泛记录,但其对海草床的影响,尤其是对碳固存能力的影响,尚未得到足够重视。本综述旨在从五个关键方面概述微塑料对海草生态系统碳固存能力的潜在影响:(1) MPs 是有机碳的来源,造成海草生态系统的直接污染;(2) MPs 对海草及其附生藻类的影响,影响植物生长和净初级生产力;(3) MPs 对微生物的影响,影响难降解有机碳和温室气体的产生;(4) 主要污染物对海草沉积物的影响,改变植物废弃物的质量、结构、性质和分解过程; (5) 根据主要污染物的不同行为,对海草生态系统产生的其他复杂影响。综述了这些领域的最新进展,并讨论了对未来工作的建议。本综述可为今后的多学科研究提供有价值的见解,并鼓励全社会实施有效的保护措施,以提高海草床的固碳能力。
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来源期刊
Marine environmental research
Marine environmental research 环境科学-毒理学
CiteScore
5.90
自引率
3.00%
发文量
217
审稿时长
46 days
期刊介绍: Marine Environmental Research publishes original research papers on chemical, physical, and biological interactions in the oceans and coastal waters. The journal serves as a forum for new information on biology, chemistry, and toxicology and syntheses that advance understanding of marine environmental processes. Submission of multidisciplinary studies is encouraged. Studies that utilize experimental approaches to clarify the roles of anthropogenic and natural causes of changes in marine ecosystems are especially welcome, as are those studies that represent new developments of a theoretical or conceptual aspect of marine science. All papers published in this journal are reviewed by qualified peers prior to acceptance and publication. Examples of topics considered to be appropriate for the journal include, but are not limited to, the following: – The extent, persistence, and consequences of change and the recovery from such change in natural marine systems – The biochemical, physiological, and ecological consequences of contaminants to marine organisms and ecosystems – The biogeochemistry of naturally occurring and anthropogenic substances – Models that describe and predict the above processes – Monitoring studies, to the extent that their results provide new information on functional processes – Methodological papers describing improved quantitative techniques for the marine sciences.
期刊最新文献
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