Depth-structured diversity: high number of undescribed species of Tanaidacea (Crustacea) across depth gradient in subarctic regions of the NE Pacific

IF 3.6 3区地球科学 Q1 OCEANOGRAPHY

Progress in Oceanography Pub Date : 2025-08-19 DOI:10.1016/j.pocean.2025.103558

Głuchowska Kamila , Błażewicz Magdalena , Fontaneto Diego , Gellert Marta , Pourebrahimi Somayeh , Martínez Alejandro

{"title":"Depth-structured diversity: high number of undescribed species of Tanaidacea (Crustacea) across depth gradient in subarctic regions of the NE Pacific","authors":"Głuchowska Kamila , Błażewicz Magdalena , Fontaneto Diego , Gellert Marta , Pourebrahimi Somayeh , Martínez Alejandro","doi":"10.1016/j.pocean.2025.103558","DOIUrl":null,"url":null,"abstract":"<div><div>This study investigated the diversity and ecological structuring of deep-sea tanaidacean assemblages across four environmentally distinct regions of the North Pacific: the Bering Sea, the Aleutian Trench, and its northern and southern slopes. Sampling was conducted during the AleutBio (SO293) expedition aboard RV <em>Sonne</em> in 2023 using standardized benthic gear, including the epibenthic sledge (25 valid deployments) and box corer (11 valid deployments), at depths ranging from 3,500 to 7,200 m. Each region encompassed a unique deep-sea setting, characterized by specific bathymetric profiles, geomorphological features, and presumed trophic regimes. A detailed morphological analysis identified 63 morphospecies, of which 62 are likely undescribed. Species richness declined with increasing depth and reached its highest levels in the Bering Sea. Beta diversity analyses revealed significant differences in community composition among regions, primarily driven by depth, and secondarily by food availability, inferred from dissolved silica concentrations.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"239 ","pages":"Article 103558"},"PeriodicalIF":3.6000,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Progress in Oceanography","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0079661125001466","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"OCEANOGRAPHY","Score":null,"Total":0}

引用次数: 0

Abstract

This study investigated the diversity and ecological structuring of deep-sea tanaidacean assemblages across four environmentally distinct regions of the North Pacific: the Bering Sea, the Aleutian Trench, and its northern and southern slopes. Sampling was conducted during the AleutBio (SO293) expedition aboard RV Sonne in 2023 using standardized benthic gear, including the epibenthic sledge (25 valid deployments) and box corer (11 valid deployments), at depths ranging from 3,500 to 7,200 m. Each region encompassed a unique deep-sea setting, characterized by specific bathymetric profiles, geomorphological features, and presumed trophic regimes. A detailed morphological analysis identified 63 morphospecies, of which 62 are likely undescribed. Species richness declined with increasing depth and reached its highest levels in the Bering Sea. Beta diversity analyses revealed significant differences in community composition among regions, primarily driven by depth, and secondarily by food availability, inferred from dissolved silica concentrations.

查看原文本刊更多论文

深度结构的多样性：东北太平洋亚北极地区在深度梯度上有大量未描述的甲壳类物种

本研究调查了北太平洋四个环境不同的区域：白令海、阿留申海沟及其南北斜坡的深海tanaidean组合的多样性和生态结构。在2023年的阿留特生物（SO293）考察期间，使用标准化的底栖设备，包括底栖雪橇（25个有效部署）和箱盖（11个有效部署），在3500至7200 m的深度范围内进行采样。每个区域都有独特的深海环境，以特定的水深剖面、地貌特征和假定的营养状况为特征。详细的形态学分析鉴定出63种形态，其中62种可能未被描述。物种丰富度随深度的增加而下降，在白令海达到最高。Beta多样性分析显示，不同地区之间的群落组成存在显著差异，主要由深度驱动，其次由溶解二氧化硅浓度推断出的食物可用性驱动。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Progress in Oceanography 地学-海洋学

CiteScore

7.20

自引率

4.90%

发文量

138

审稿时长

3 months

期刊介绍： Progress in Oceanography publishes the longer, more comprehensive papers that most oceanographers feel are necessary, on occasion, to do justice to their work. Contributions are generally either a review of an aspect of oceanography or a treatise on an expanding oceanographic subject. The articles cover the entire spectrum of disciplines within the science of oceanography. Occasionally volumes are devoted to collections of papers and conference proceedings of exceptional interest. Essential reading for all oceanographers.