浅水湖中鱼类特征与甲烷衍生碳对鱼类贡献之间的关系

IF 2.8 2区生物学 Q2 ECOLOGY

Freshwater Biology Pub Date : 2024-08-20 DOI:10.1111/fwb.14319

Kenji Tsuchiya, Shin-ichiro S. Matsuzaki, Ayato Kohzu

引用次数: 0

摘要

尽管甲烷衍生碳（MDC）向摇蚊幼虫和寡毛类等底栖大型无脊椎动物转移的情况已被充分记录，但有关 MDC 向鱼类转移的知识却很有限。我们调查了日本霞浦湖中 28 种鱼类在各个生长阶段对 MDC 的贡献，并研究了鱼类特征（包括体型）与鱼类物种内 MDC 贡献之间的关系。我们使用碳稳定同位素比和双源混合模型（甲烷氧化细菌 [MOB] 和颗粒有机物）来估算 MDC 对鱼类的贡献。单条鱼的 MDC 贡献率从 0% 到 21.5% 不等。鳗鲡的甲烷氧化菌贡献率最高（平均为 3.8%）。根据两个标准将鱼类物种分为四组：(a) MDC 贡献率与鱼体大小（物种内）之间的相关性是否为显著负相关（负相关与不显著相关；ns）；以及 (b) MDC 贡献率的第 90 百分位数是否为 0%。(a)ns/(b)>0%组的平均 MDC 贡献率最高（2.18% ± 2.93%，12 个物种），包括 Abbottina rivularis（平均 5.5%）和 Biwia zezera（平均 9.8%）等高贡献率物种。这组物种（12 种）包括数量相对较多的底栖栖息地利用物种（8 种）和杂食物种（9 种）。(a)ns/(b)=0%组（7 个物种）的平均 MDC 贡献率几乎为零，该组仅包括 2 个使用底栖栖息地的物种和 1 个杂食物种。其他组的平均 MDC 贡献率介于(a)负/(b)>0%（1.30% ± 1.17%，7 个物种）和(a)负/(b)=0%（0.10%，2 个物种）之间。在(a)负/(b)>0%和(a)负/(b)=0%的群体中，种内鱼体大小与MDC贡献率之间呈负相关，这表明本体栖息地和食性的改变引起了MDC转移的变化。我们的研究结果表明，28种鱼类中有21种参与了浅水湖泊中的MDC转移，但MDC转移的变化可以用鱼类的性状（营养行会和生境利用）来解释。虽然所有鱼类物种的平均 MDC 贡献率较低（0.61% ± 1.97%），但粗略估计的鱼类对 MOB 的年消耗率约相当于沉积物中 MOB 产量的 10%，这表明从生物地球化学循环的角度来看，鱼类对甲烷动态有贡献。

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来源期刊

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.