海底物理扰动对秘鲁盆地锰结核矿带 "生命痕迹 "丰度的短期和十年期影响

IF 1.5 4区 环境科学与生态学 Q3 BIODIVERSITY CONSERVATION
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引用次数: 0

摘要

摘要 近年来,随着需求和成本的增加,人们对深海开采多金属结核作为陆上开采各种高技术金属的替代来源的兴趣日益高涨。因此,评估其对多金属结核生态系统的短期和长期影响的研究需求也日益迫切。最近基于图像的考察研究描述了在特定时间点对这些生态系统的表生/巨型海底生物群落的时间影响。然而,这些研究未能捕捉到沉积物中大型底栖生物的信息,也未能提供这些区域潜在的瞬时和时间有限的使用者的信息,如移动的表层沉积取食者或对水华事件或食物坠落沉积做出反应的动物。本研究利用秘鲁盆地多金属结核矿带的数据(该矿带的海底曾在 1989 年受到犁耙扰动,在 2015 年受到底栖生物雪橇(EBS)的扰动),模拟两种截然不同的可能采矿扰动影响形式。为了弥补有关瞬态表生动物和底栖动物使用这些富含结核的海底扰动区和未扰动区的信息不足,对 2015 年扰动事件发生 6 个月后收集的图像进行了检查,并对所有 "生命痕迹"(Lebensspuren)按类型(表生动物或底栖动物痕迹制造者,以及可能的形成动物物种)进行了特征描述,以及它们是否出现在未扰动海底或 1989 年或 2015 年扰动的区域。研究结果表明,在犁耕过的海底和 EBS 扰动过的海底,外底栖生物和内底栖生物的数量至少减少了 50%。这表明,即使在扰动发生 26 年后,这些区域的动物对沉积物的利用可能仍然不足。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Short and decadal impacts of seafloor physical perturbation on the abundances of Lebensspuren ‘traces of life’ in the Peru Basin manganese nodule province

Abstract

Interest in deep-sea mining for polymetallic nodules as an alternative source to onshore mines for various high-technology metals has risen in recent years, as demands and costs have increased. The need for studies to assess its short- and long-term consequences on polymetallic nodule ecosystems is therefore also increasingly prescient. Recent image-based expedition studies have described the temporal impacts on epi-/megafauna seafloor communities across these ecosystems at particular points in time. However, these studies have failed to capture information on large infauna within the sediments or give information on potential transient and temporally limited users of these areas, such as mobile surface deposit feeders or fauna responding to bloom events or food fall depositions. This study uses data from the Peru Basin polymetallic nodule province, where the seafloor was previously disturbed with a plough harrow in 1989 and with an epibenthic sled (EBS) in 2015, to simulate two contrasting possible impact forms of mining disturbance. To try and address the shortfall on information on transient epifauna and infauna use of these various disturbed and undisturbed areas of nodule-rich seafloor, images collected 6 months after the 2015 disturbance event were inspected and all Lebensspuren, ‘traces of life’, were characterized by type (epi- or infauna tracemakers, as well as forming fauna species where possible), along with whether they occurred on undisturbed seafloor or regions disturbed in 1989 or 2015. The results show that epi- and endobenthic Lebensspuren were at least 50% less abundant across both the ploughed and EBS disturbed seafloors. This indicates that even 26 years after disturbance, sediment use by fauna may remain depressed across these areas.

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来源期刊
Marine Biodiversity
Marine Biodiversity BIODIVERSITY CONSERVATION-MARINE & FRESHWATER BIOLOGY
CiteScore
3.30
自引率
6.20%
发文量
56
期刊介绍: Marine Biodiversity is a peer-reviewed international journal devoted to all aspects of biodiversity research on marine ecosystems. The journal is a relaunch of the well-known Senckenbergiana maritima" and covers research at gene, species and ecosystem level that focuses on describing the actors (genes and species), the patterns (gradients and distributions) and understanding of the processes responsible for the regulation and maintenance of diversity in marine systems. Also included are the study of species interactions (symbioses, parasitism, etc.) and the role of species in structuring marine ecosystem functioning. Marine Biodiversity offers articles in the category original paper, short note, Oceanarium and review article. It forms a platform for marine biodiversity researchers from all over the world for the exchange of new information and discussions on concepts and exciting discoveries. - Covers research in all aspects of biodiversity in marine ecosystems - Describes the actors, the patterns and the processes responsible for diversity - Offers peer-reviewed original papers, short communications, review articles and news (Oceanarium) - No page charges
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