预测西北太平洋麦哲伦海山链富钴结壳深水海山巨型底栖生物群落的分布情况

IF 2.3 3区 地球科学 Q2 OCEANOGRAPHY
Runxuan Yan , Chengcheng Shen , Dongsheng Zhang , Zhenggang Li , Leyi Fang , Chunsheng Wang
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引用次数: 0

摘要

深海海山生态系统对人类活动十分敏感,受到干扰后恢复速度缓慢。底拖网捕捞和潜在的深海矿物开采会严重破坏海隆上的底栖生物群落,严重影响深海生态系统。对海山巨型底栖生物的分布或群落结构缺乏足够的了解,阻碍了深海保护和管理。在这项研究中,根据由载人潜水器(HOV)和遥控潜水器(ROV)沿横断面采集的记录和环境变量生成的多学科数据集,在两个相邻的深水海隆上观测到了一系列巨型底栖生物形态群,并利用物种分布模型(SDM)对其进行了预测。根据预测的各形态类群的分布情况,通过聚类分析确定了五个不同的群落。SDM结果表明,环境变量对不同形态类群的分布有不同的影响,其中近底流的平均流速和东向、水深位置指数(BPI)和反向散射强度对大型底栖生物的分布格局影响最大。五个不同群落的分布表明,两座深水海山的群落组成相似,这表明两座海山之间可能存在联系。群落分布从群落层面揭示了深水海山脆弱性的空间特征,可为深海生态系统的海洋空间规划提供直接依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Predicting the distribution of megabenthic communities on deep-water seamounts with cobalt-rich crusts in the Magellan Seamount Chain in the northwestern Pacific ocean

Deep-water seamount ecosystems are sensitive to human activities and have a slow recovery rate after being disturbed. Bottom trawling and potential deep-sea mineral extraction could severely damage benthic communities on seamounts and seriously impact deep-sea ecosystems. Inadequate knowledge of the distribution of megabenthos on seamounts or their community structure hinders deep-sea conservation and management. In this study, based on a multidisciplinary dataset generated from recordings taken by human-occupied vehicle (HOV) and remotely operated vehicles (ROVs) along transects and environmental variables, a range of megabenthic morphotaxa were observed on two adjacent deep-water seamounts and predicted using species distribution models (SDMs). Accordingly, based on the predicted distribution of each morphotaxon, five distinct communities were identified through cluster analysis. The results of SDMs showed that environmental variables varyingly impacted the distribution of different morphotaxa, among which the average velocity and eastness direction of near-bottom currents, bathymetric position index (BPI), and backscatter intensity exerted the most significant influence on megabenthic distribution patterns. The distribution of five distinct communities showed a similarity of community composition on the two deep-water seamounts, suggesting a potential connectivity between the two seamounts. The distribution of communities revealed the spatial characteristics of vulnerability of deep-water seamounts at the community level, which could provide a direct basis for marine spatial planning of deep-sea ecosystems.

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来源期刊
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.
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