Nitrogen subsidies to pelagic food webs through profundal methane-oxidising bacteria in oligotrophic fresh water

IF 2.8 2区 生物学 Q2 ECOLOGY Freshwater Biology Pub Date : 2024-03-31 DOI:10.1111/fwb.14238
Erica Silk P. dela Paz, Noboru Okuda, Pei-Chi Ho, Fan-Sian Lin, Chih-hao Hsieh, Chao-Chen Lai, Megumu Fujibayash, Fuh-Kwo Shiah, Chia-Ying Ko
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通过低营养淡水中的深层甲烷氧化细菌为浮游食物网提供氮补贴
甲烷氧化细菌(MOB)是一种替代性基础资源,它通过浮游生物-底栖生物耦合作用为浮游生物群落提供营养补贴,预计将改变浮游动物的碳氮比(C/N)和生物量,并影响水生食物网的生物过程。以往的研究表明,大多数 MOB 对浮游动物的营养补贴主要集中在碳补贴上;然而,考虑到氮对浮游动物和浮游植物的生长非常重要,因此需要更好地了解 MOB 对浮游生物群落的氮补贴。我们基于 2010-2014 年期间对亚热带深层寡营养淡水生态系统的现场调查,研究了夏季分层期与冬季混合期之间营养物质、浮游植物特定质量生产力、MOB 依赖性、碳/氮比和浮游动物生物量的变化。结果表明,随着冬季混合期对 MOB 依赖性的增加,浮游动物的 C/N 比值降低,并与浮游动物的生物量呈显著的非线性反比关系。浮游动物生物量与浮游植物特定质量生产力之间的负相关关系在同步时间内得到进一步观察。深层 MOB 增强了浮游生物与深层生物的耦合,在冬季和/或生产力较低的季节为浮游浮游生物食物网提供了替代性氮支持,使人们对甲烷营养体在水生食物网中的作用有了更深入的了解。
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来源期刊
Freshwater Biology
Freshwater Biology 生物-海洋与淡水生物学
CiteScore
5.90
自引率
3.70%
发文量
162
审稿时长
2 months
期刊介绍: Freshwater Biology publishes papers on all aspects of the ecology of inland waters, including rivers and lakes, ground waters, flood plains and other freshwater wetlands. We include studies of micro-organisms, algae, macrophytes, invertebrates, fish and other vertebrates, as well as those concerning whole systems and related physical and chemical aspects of the environment, provided that they have clear biological relevance. Studies may focus at any level in the ecological hierarchy from physiological ecology and animal behaviour, through population dynamics and evolutionary genetics, to community interactions, biogeography and ecosystem functioning. They may also be at any scale: from microhabitat to landscape, and continental to global. Preference is given to research, whether meta-analytical, experimental, theoretical or descriptive, highlighting causal (ecological) mechanisms from which clearly stated hypotheses are derived. Manuscripts with an experimental or conceptual flavour are particularly welcome, as are those or which integrate laboratory and field work, and studies from less well researched areas of the world. Priority is given to submissions that are likely to interest a wide range of readers. We encourage submission of papers well grounded in ecological theory that deal with issues related to the conservation and management of inland waters. Papers interpreting fundamental research in a way that makes clear its applied, strategic or socio-economic relevance are also welcome. Review articles (FRESHWATER BIOLOGY REVIEWS) and discussion papers (OPINION) are also invited: these enable authors to publish high-quality material outside the constraints of standard research papers.
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