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首页> 外文期刊>Estuarine coastal and shelf science >Can no-bubble methane seeps affect biological traits of benthic macroinvertebrates in coastal systems?
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Can no-bubble methane seeps affect biological traits of benthic macroinvertebrates in coastal systems?

机译：Can no-bubble methane seeps affect biological traits of benthic macroinvertebrates in coastal systems?

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摘要

Methane seep studies often target sites where methane gas is actively bubbling from the sea floor to the water column. However, gas bubbles often remain trapped in surficial seabed sediments, especially in coastal systems; notably few ecological studies exist for these systems. These environments form patches on the seafloor in the Bahia Blanca estuary that, based on taxonomic analysis, represent a distinct benthic habitat. Here we examine whether taxonomic changes in benthic communities associated with trapped methane gas bubbles are related to functional changes. We found significant differences in biological traits of macroinvertebrates weighted by abundance and by species between two sites differing in gas presence and between spring and winter seasons. Compared with the control (no gas) site, the gas site had subsurface-deposit feeders and large sessile animals partially calcified with suspension-feeding mode. In contrast, at the control site the small and non-calcified animals are discretely motile, building burrows and tubes and feeding on surface deposit material. Trapped methane gas, detected with seismic methods, changes biological traits in benthic fauna and can lead to alteration of some ecosystem functions. This suggests the utility of high-resolution seismic methods for detect these benthic habitats with high spatial accuracy, and a need to further understanding of ecosystem processes associated with gas presence in the context of both direct anthropogenic and climate-change pressures.

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  • 来源
    《Estuarine coastal and shelf science》 |2021年第31期|107525.1-107525.15|共15页
  • 作者

    Bravo M. E.; Levin L. A.; Fiori S. M.Aliotta S.Ginsberg S.;

  • 作者单位

    CONICET UNS, Inst Argentino Oceanog, Carrindanga Km 7, RA-78000 Bahia Blanca, Buenos Aires, Argentina|Univ Buenos Aires, Fac Ciencias Exactas & Nat, Inst Geociencias Basicas Aplicadas & Ambientales, Dept Ciencias Geol,IGEBA UBA CONICET, Buenos Aires, DF,;

    Univ Calif San Diego, Scripps Inst Oceanog, Ctr Marine Biodivers & Conservat, 9500 Gilman Dr, La Jolla, CA 92093 USA;

    CONICET UNS, Inst Argentino Oceanog, Carrindanga Km 7, RA-78000 Bahia Blanca, Buenos Aires, Argentina|Univ Nacl Sur UNS, Dept Biol Bioquim & Farm, San Juan 672, RA-8000 Bahia Blanca, Buenos Aires, ArgentinaCONICET UNS, Inst Argentino Oceanog, Carrindanga Km 7, RA-78000 Bahia Blanca, Buenos Aires, Argentina|Univ Nacl Sur UNS, Dept Geol, Av Alem 1253, RA-8000 Bahia Blanca, Buenos Aires, ArgentinaCONICET UNS, Inst Argentino Oceanog, Carrindanga Km 7, RA-78000 Bahia Blanca, Buenos Aires, Argentina|Univ Nacl Sur UNS, Dept Geol, Av Alem 1253, RA-8000 Bahia Blanca, Buenos Aires, Argentina|Univ Tecnol Nacl UTN, Dept Ingn Civil, FRBB, 11 Abril 461, RA-8;

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  • 原文格式 PDF
  • 正文语种 英语
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  • 关键词

    Methane; Seismic survey; Biological traits analysis; Benthic ecological functions; Benthic habitat;

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