Longevity of subtidal mussel beds (Mytilus edulis) in eutrophic coastal areas

IF 2.1 4区 地球科学 Q2 MARINE & FRESHWATER BIOLOGY Journal of Sea Research Pub Date : 2024-05-19 DOI:10.1016/j.seares.2024.102506
Isabelle Johansson, Camille Saurel, Daniel Taylor , Jens Kjerulf Petersen, Pernille Nielsen
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Abstract

Mussel populations (Mytilus edulis) around the coasts of Europe and the North Atlantic are often ephemeral and have notably experienced a large decline in abundance. Since 1993, annual blue mussel stock surveys have been carried out in the Limfjorden, Denmark. We used the stock survey data combined with electronic monitoring fishing data and Mechanistic Models for the Limfjorden, providing environmental data to investigate the impact of various stressors. Multiple factors were found to affect the longevity of subtidal mussel beds in Limfjorden. Predation by starfish, fishing activities, shell length of the mussels, amplitude in summer temperature and consecutive days of oxygen depletion decreased the longevity of the beds. Conversely, increased biomass, multiple cohorts and increasing water depth demonstrate stabilising effects. Water column stratification had both a negative and positive impact on bed longevity depending on the duration. These analyses can help inform environmental, conservation, and fisheries managers on the long-term trends of population dynamics and gain a deeper understanding of what factors can affect mussel bed longevity in the context of declining stocks.

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富营养化沿海地区潮下贻贝床(Mytilus edulis)的寿命
欧洲和北大西洋沿岸的贻贝(Mytilus edulis)种群通常昙花一现,而且数量明显大幅下降。自 1993 年以来,丹麦林峡湾(Limfjorden)每年都会进行蓝贻贝种群调查。我们利用种群调查数据,结合电子监测捕鱼数据和林峡湾机制模型,提供环境数据,研究各种压力因素的影响。研究发现,多种因素会影响林姆峡湾潮下贻贝床的寿命。海星的捕食、捕鱼活动、贻贝壳的长度、夏季气温的变化幅度以及连续几天的氧气耗尽都会降低贻贝床的寿命。相反,生物量的增加、多群贻贝的出现和水深的增加则会产生稳定作用。水柱分层对海床寿命既有负面影响,也有正面影响,具体取决于持续时间。这些分析有助于环境、自然保护和渔业管理人员了解种群动态的长期趋势,并更深入地了解在种群数量减少的情况下,哪些因素会影响贻贝床的寿命。
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来源期刊
Journal of Sea Research
Journal of Sea Research 地学-海洋学
CiteScore
3.20
自引率
5.00%
发文量
86
审稿时长
6-12 weeks
期刊介绍: The Journal of Sea Research is an international and multidisciplinary periodical on marine research, with an emphasis on the functioning of marine ecosystems in coastal and shelf seas, including intertidal, estuarine and brackish environments. As several subdisciplines add to this aim, manuscripts are welcome from the fields of marine biology, marine chemistry, marine sedimentology and physical oceanography, provided they add to the understanding of ecosystem processes.
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