Isotopic signatures and nutritional composition of selected macrobenthos from the site F cold seep in the South China Sea

IF 2.3 3区地球科学 Q2 OCEANOGRAPHY

Deep-Sea Research Part I-Oceanographic Research Papers Pub Date : 2025-04-07 DOI:10.1016/j.dsr.2025.104501

Haining Wang , Xiaocheng Wang , Minxiao Wang , Chaolun Li

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Abstract

Understanding the food sources and nutrient structures is crucial for grasping the community structure and function. At Site F, which is characterized by active seepages, a diverse macrobenthos community thrives. Carbon and nitrogen isotopic values vary among species and between species and their environment. We have constructed a hypothetical food web for Site F, which includes four trophic levels and encompasses 22 species. Two distinct communities were identified based on the presence or absence of seepage, and their complexity was compared using Bayesian metrics and specialization index. Our findings suggest that the availability and diversity of food resources, coupled with abiotic pressures and biotic interactions, play a crucial role in shaping community complexity. The non-seep community exhibited lower species richness and diversity, resulting in reduced community complexity compared to the seep community at Site F. These results contribute to a deeper understanding of nutritional ecology and community structure at Site F cold seep.

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南海F冷渗点大型底栖动物的同位素特征及营养成分

了解食物来源和营养结构对于掌握群落结构和功能至关重要。在以活跃渗流为特征的 F 处，大型底栖生物群落种类繁多。不同物种之间以及物种与环境之间的碳氮同位素值各不相同。我们为 F 站点构建了一个假想食物网，其中包括四个营养级，涵盖 22 个物种。根据渗流的存在与否确定了两个不同的群落，并利用贝叶斯指标和专业化指数对其复杂性进行了比较。我们的研究结果表明，食物资源的可用性和多样性，加上非生物压力和生物相互作用，在形成群落复杂性方面起着至关重要的作用。与 F 站点渗漏群落相比，非渗漏群落表现出较低的物种丰富度和多样性，导致群落复杂性降低。

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来源期刊

Deep-Sea Research Part I-Oceanographic Research Papers 地学-海洋学

CiteScore

4.60

自引率

4.20%

发文量

144

审稿时长

18.3 weeks

期刊介绍： Deep-Sea Research Part I: Oceanographic Research Papers is devoted to the publication of the results of original scientific research, including theoretical work of evident oceanographic applicability; and the solution of instrumental or methodological problems with evidence of successful use. The journal is distinguished by its interdisciplinary nature and its breadth, covering the geological, physical, chemical and biological aspects of the ocean and its boundaries with the sea floor and the atmosphere. In addition to regular "Research Papers" and "Instruments and Methods" papers, briefer communications may be published as "Notes". Supplemental matter, such as extensive data tables or graphs and multimedia content, may be published as electronic appendices.