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首页> 外文期刊>Progress in Oceanography >Abyssal fauna, benthic microbes, and organic matter quality across a range of trophic conditions in the western Pacific ocean
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Abyssal fauna, benthic microbes, and organic matter quality across a range of trophic conditions in the western Pacific ocean

机译：海洋动物的动物遗传群，底栖微生物和有机物质质量在西太平洋的一系列营养条件下

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摘要

The abyssal plain covers more than half the Earth's surface. The main food source to abyssal ecosystems is phytodetritus, which originates from phytoplankton in the surface ocean, and thus its variability to the seafloor is a major driver of abyssal ecosystem biomass and functioning. In this study, we conducted a comparative survey on organic matter (OM) quality and quantity in abyssal plain sediments and examined the distributions of megafauna, macrofauna, meiofauna, prokaryotes, and viruses in eutrophic (39 degrees N), oligotrophic (1 degrees N), and ultraoligotrophic (12 degrees N) areas of the western Pacific. We also analyzed stable carbon and nitrogen isotopic compositions of organisms at 39 degrees N and 1 degrees N to assess differences in benthic abyssal food-web structures with contrasting trophic states. Sediments collected at 39 degrees N presented highest concentrations of total organic carbon (TOC) and labile OM, and high diffusive oxygen uptake rates. By contrast, the lowest values were found at 12 degrees N. Vertical distributions of sediment macrofauna, meiofauna, and prokaryotes matched with labile OM profiles. There were prominent differences in abundances of macro- and megafauna among stations with different OM fluxes, whereas the abundance of meiofauna and prokaryotes showed smaller differences among stations. Such differences could be explained by higher turnover rates of smaller organisms. Food-web structures of abyssal plains are likely influenced by both the type and size of primary producers in surface ocean. Our results underscore the crucial importance of OM fluxes and their compositions to the abundances and vertical profiles of labile OM and benthic biota in abyssal ecosystems.
机译：深渊平原占地面积超过地球表面。深渊生态系统的主要食物来源是植物植物，其源自表面海洋的浮游植物，因此其对海底的可变性是深度生态系统生物量和功能的主要驱动力。在这项研究中，我们对深度普通沉积物的有机质（OM）质量和数量进行了比较调查，并检查了富营养化（39℃），寡噬细胞（1℃） ）和西太平洋的超微营养（12摄氏度）区域。我们还在39℃和1摄氏度下分析了生物体的稳定碳和氮同位素组合物，以评估具有对比的营养态的底栖复苏食品纤维网结构的差异。在39摄氏度收集的沉积物呈现出最高浓度的总有机碳（TOC）和不稳定的OM，以及高扩散氧气吸收率。相比之下，在12摄氏度的沉积物Macrofauna，Meiofauna和与不稳定OM型材匹配的原核生物的垂直分布中找到了最低值。在不同OM势态的站中，宏观和Megafauna丰富的突出差异，而Meiofauna和原核生物的丰度在车站之间表现出较小的差异。这种差异可以通过较小的生物的营业额率高。深海的食物腹板结构可能受到表面海洋中主要生产商的类型和规模的影响。我们的结果强调了OM助熔剂及其组合物至无奈OM和Benthic Biota在深海生态系统中的丰富和垂直曲线至关重要。

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  • 来源
    《Progress in Oceanography》 |2021年第7期|102591.1-102591.14|共14页
  • 作者

    Nomaki Hidetaka; Rastelli Eugenio; Alves Andreia; Suga Hisami; Ramos Sandra; Kitahashi Tomo; Tsuchiya Masashi; Ogawa Nanako O.; Matsui Yohei; Seike Koji; Miyamoto Norio; Corinaldesi Cinzia; Manea Elisabetta; Ohkouchi Naohiko; Danovaro Roberto; Nunoura Takuro; Amaro Teresa;

  • 作者单位

    Japan Agcy Marine Earth Sci & Technol JAMSTEC X Star 2-15 Natsushima Cho Yokosuka Kanagawa 2370061 Japan;

    Fano Marine Ctr Dept Marine Biotechnol Stn Zool Anton Dohrn Viale Adriat 1-N I-61032 Fano Italy;

    Univ Porto UPorto Interdisciplinary Ctr Marine & Environm Res CIIMA Av Gen Norton Matos S-N P-4450208 Matosinhos Portugal;

    Japan Agcy Marine Earth Sci & Technol JAMSTEC Res Inst Marine Resources Utilizat MRU Yokosuka Kanagawa 2370061 Japan;

    Univ Porto UPorto Interdisciplinary Ctr Marine & Environm Res CIIMA Av Gen Norton Matos S-N P-4450208 Matosinhos Portugal;

    Japan Agcy Marine Earth Sci & Technol JAMSTEC Res Inst Global Change RIGC Yokosuka Kanagawa 2370061 Japan;

    Japan Agcy Marine Earth Sci & Technol JAMSTEC Res Inst Global Change RIGC Yokosuka Kanagawa 2370061 Japan;

    Japan Agcy Marine Earth Sci & Technol JAMSTEC Res Inst Marine Resources Utilizat MRU Yokosuka Kanagawa 2370061 Japan;

    Japan Agcy Marine Earth Sci & Technol JAMSTEC X Star 2-15 Natsushima Cho Yokosuka Kanagawa 2370061 Japan;

    Geol Survey Japan Natl Inst Adv Ind Sci & Technol AIST Cent 7 1-1-1 Higashi Tsukuba Ibaraki 3058567 Japan;

    Japan Agcy Marine Earth Sci & Technol JAMSTEC X Star 2-15 Natsushima Cho Yokosuka Kanagawa 2370061 Japan;

    Polytech Univ Marche Dept Mat Environm Sci & Urban Planning Via Brecce Bianche I-60131 Ancona Italy;

    Natl Res Council ISMAR CNR Inst Marine Sci Tesa 104 Castello 2737-F I-30122 Venice Italy;

    Japan Agcy Marine Earth Sci & Technol JAMSTEC Res Inst Marine Resources Utilizat MRU Yokosuka Kanagawa 2370061 Japan;

    Stn Zool Anton Dohrn I-80121 Naples Italy|Polytech Univ Marche Dept Life & Environm Sci Via Brecce Bianche I-60131 Ancona Italy;

    Japan Agcy Marine Earth Sci & Technol JAMSTEC Res Ctr Biosci & Nanosci CeBN Yokosuka Kanagawa 2370061 Japan;

    Hellenic Ctr Marine Res HCMR Iraklion 71003 Greece|Univ Aveiro Dept Biol & CESAM Campus Santiago P-3810193 Aveiro Portugal;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Abyssal plains; Particulate organic carbon; Benthic organisms; Virus; Food-webs; Vertical distribution; Western Pacific Ocean;

    机译：深海平原;颗粒状有机碳;底栖生物;病毒;食物网;垂直分布;西太平洋;

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