Deep-Sea Research Part I-Oceanographic Research Papers最新文献_第3页

Response of deep-sea cold seep sediments to methane gas migration: Influence on sediment microstructure 深海冷渗沉积物对甲烷气体运移的响应：对沉积物微观结构的影响

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Deep-Sea Research Part I-Oceanographic Research Papers

Pub Date : 2025-11-12 DOI: 10.1016/j.dsr.2025.104621

Yue Zhang , Jing-chun Feng , Bin Wang , Hui Zhang , Yuhang Zhang , Zhifeng Yang , Si Zhang

In deep-sea cold seep sediments, the modification of the microstructure of sediments by methane (CH₄) gas migration will directly affect sediment stability, the accumulation of hydrates, and the ecological and geological environment of the seafloor. Although the decomposition of hydrates caused by geological activities in deep-sea cold seeps lead to CH₄ release, it is still unclear how the migration behavior resulting from the release of CH₄ gas in cold seep areas alters the microstructure of sediments. In this study, we investigated the microstructural evolution of cold seep sediments during CH₄ migration, combined with X-ray computed tomography (X-CT). Here, we set up experimental conditions with different gas flow rates and different sediment particle sizes to study the influence of CH₄ migration on the microstructure modification of sediments, and to analyze its impact on hydrate accumulation and the ecological and geological environment of the seafloor. The changes in the distribution of particle theta (θ) and phi (φ) values indicated that the orientation distribution of coarse and medium sand particles tends to be isotropic. Compared to the initial state, the high gas flow rate caused bubble expansion, resulting in a slight increase of 2–5 % in local porosity. In addition, the migration channel selectivity of CH₄ was higher in coarse and medium sand sediments, while the low connectivity of fine sand sediments limits the migration of CH₄. While the tiny bubbles remaining in the pores of fine sand sediments can enhance the mass transfer and transformation of CH₄.

在深海冷渗沉积物中，甲烷（CH4）气体运移对沉积物微观结构的改变将直接影响沉积物的稳定性、水合物的富集以及海底的生态地质环境。虽然深海冷渗漏区地质活动导致水合物分解导致CH4释放，但冷渗漏区CH4气体释放导致的迁移行为如何改变沉积物微观结构尚不清楚。在这项研究中，我们结合x射线计算机断层扫描（X-CT）研究了CH4迁移过程中冷渗沉积物的微观结构演变。本研究通过设置不同气体流速和不同沉积物粒径的实验条件，研究CH4迁移对沉积物微观结构改性的影响，并分析其对水合物聚集和海底生态地质环境的影响。颗粒θ (θ)和φ (φ)值分布的变化表明，粗粒和中粒的取向分布趋于各向同性。与初始状态相比，高气体流速导致气泡膨胀，导致局部孔隙度略微增加2 - 5%。此外，CH4在粗、中沙质沉积物中运移通道选择性较高，而细沙质沉积物的低连通性限制了CH4的运移。而细砂沉积物孔隙中残留的微小气泡则能促进CH4的传质转化。

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引用次数: 0

Detrital and authigenic minerals across the continental slope of the East China Sea, evidence for sedimentary provenance and environmental changes since the Last Glacial Maximum 东海陆坡碎屑和自生矿物：末次盛冰期以来沉积物源和环境变化的证据

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Deep-Sea Research Part I-Oceanographic Research Papers

Pub Date : 2025-11-07 DOI: 10.1016/j.dsr.2025.104623

Libo Wang, Bin Zhai, Xilin Zhang, Xianrong Zhang, Zhilei Sun, Jingtao Zhao, Yong Zhang, Yanguang Dou

To enhance the understanding of source-to-sink processes and paleoenvironmental evolution in the East China Sea (ECS), this study presents a comprehensive analysis of grain size, mineral composition, total organic carbon (TOC), and radiocarbon dating in five piston cores collected from the shelf break to the lower continental slope. The provenance of bulk sediments is determined using mineral compositions of different grain size components to mitigate the influence of mechanical differentiation. On the shelf break, sediments were derived from the Changjiang and the ECS shelf after the Last Glacial Maximum (LGM), reflecting direct fluvial input and shelf erosion. On the continental slope, sediments originated from the Changjiang during the LGM and early deglaciation (25.3–14 ka), due to the river mouth's proximity to the continental slope. During the late deglaciation (14–11.5 ka), intensified bottom shear stress shifted the dominant sediment source to the ECS shelf. During the early Holocene (11.5–8.6 ka), sediments were sourced from both the ECS shelf and the Taiwan Strait, as bottom stress migrated. During the middle and late Holocene (8.6–0 ka), the dominant source transformed to western Taiwan rivers, driven by the intrusion of the Taiwan Warm Current. Pyrite formation is closely linked to organic carbon deposition. Temporal variations in pyrite and TOC contents show opposite trends across the continental slope. Their decline on the lower continental slope during the middle and late Holocene can be attributed to intensified deep-water ventilation, which exerted limited influence on the upper continental slope.

为了加强对东海源汇过程和古环境演化的认识，本文对陆架断裂至下陆坡的5个柱塞岩心进行了粒度、矿物组成、总有机碳（TOC）和放射性碳定年的综合分析。利用不同粒度组分的矿物组成来确定大块沉积物的物源，以减轻机械分异的影响。在陆架断裂上，沉积物主要来自末次盛冰期（LGM）后的长江陆架和ECS陆架，反映了河流的直接输入和陆架侵蚀。在大陆斜坡上，由于河口靠近大陆斜坡，沉积物主要来自于LGM和早期消冰期（25.3-14 ka）的长江。在消冰期晚期（14 ~ 11.5 ka），底部剪应力的增强使主要沉积物源向ECS陆架转移。在全新世早期（11.5 ~ 8.6 ka），由于海底应力的迁移，沉积物同时来源于东大陆架和台湾海峡。在全新世中晚期（8.6 ~ 0 ka），受台湾暖流入侵的驱动，主要源流向台湾西部河流转移。黄铁矿的形成与有机碳沉积密切相关。黄铁矿和TOC含量的时间变化在整个大陆斜坡上呈现相反的趋势。在全新世中晚期，它们在下陆坡的减少可归因于深水通气的增强，而深水通气对上陆坡的影响有限。

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引用次数: 0

Machine learning analysis of polymetallic nodules and cobalt-rich ferromanganese crusts distribution: A case study from the 16°30′N seamounts region of the Kyushu-Palau Ridge 多金属结核和富钴锰铁结壳分布的机器学习分析——以九州-帕劳海岭16°30′n海山地区为例

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Deep-Sea Research Part I-Oceanographic Research Papers

Pub Date : 2025-10-30 DOI: 10.1016/j.dsr.2025.104620

Panfeng Li , Bangqi Hu , Wei Huang , Kai Lu , Gang Hu , Yuan Yang , Jingtao Zhao , Xue Ding , Weiyu Song , Jing Kan , Fuyu Wu

The seafloor is a treasure trove of mineral resources, including polymetallic nodules (PMNs) and cobalt-rich ferromanganese crusts (CFCs). However, the complex seafloor terrain and the typical depths of 3000–6000 m at which these deposits are found pose significant challenges for conventional geological sampling methods, which tend to be both inefficient and costly. The Multibeam Echo Sounder (MBES) stands out for its ability to emit multiple narrow beams and cover a broad scanning area, thereby delivering high precision, efficiency, and comprehensive coverage in marine mapping. This system is adept at simultaneously capturing multibeam bathymetry (MB) and multibeam backscatter intensity (MBI) data, which significantly aids in a more nuanced understanding of seabed composition and sedimentation dynamics. By integrating MB with sampling data, one can discern seabed characteristics, thus substantially enhancing the efficiency and selectivity of exploration efforts. Despite the successful deployment of various cutting-edge acoustic technologies for the detection of seabed substrates, most research has focused on mapping PMNs and CFCs occurrences from MBI data. Moreover, previous studies typically employed a single classification model and did not incorporate multi-model comparisons or rigorous validation techniques. In our study, we utilized MB and MBI data derived from the EM302 system, a permanent fixture on the R/V No. 9 Hai Yang Di Zhi. We also considered topographic variables such as slope, slope of slope (SOS), and Bathymetric Position Index (BPI), calculated from the MB. These were combined with geological sampling to identify the type of seafloor. Utilizing this comprehensive dataset, we developed a supervised machine learning model to assess the spatial distribution of PMNs and CFCs in the 16°30′N seamounts region of the Kyushu-Palau Ridge (KPR).

海底是矿产资源的宝库，包括多金属结核（pmn）和富钴锰铁结壳（CFCs）。然而，复杂的海底地形和发现这些矿床的典型深度为3000-6000米，这对传统的地质采样方法构成了重大挑战，这些方法往往既低效又昂贵。多波束回声探测仪（MBES）能够发射多个窄波束并覆盖广泛的扫描区域，从而在海洋测绘中提供高精度、高效率和全面的覆盖范围。该系统擅长同时捕获多波束测深（MB）和多波束后向散射强度（MBI）数据，这有助于更细致地了解海底成分和沉积动力学。通过将MB与采样数据相结合，可以识别海底特征，从而大大提高了勘探工作的效率和选择性。尽管已经成功地应用了各种尖端声学技术来探测海底基材，但大多数研究都集中在从MBI数据中绘制pmn和cfc的出现情况。此外，以往的研究通常采用单一的分类模型，没有纳入多模型比较或严格的验证技术。在我们的研究中，我们使用了来自EM302系统的MB和MBI数据，EM302系统是9号海洋地之号R/V的永久装置。我们还考虑了地形变量，如坡度、坡度的坡度（SOS）和水深位置指数（BPI），这些都是从MB计算出来的。这些变量与地质采样相结合，以确定海底的类型。利用这一综合数据集，我们开发了一个有监督的机器学习模型来评估九州-帕劳岭（KPR） 16°30′n海山地区PMNs和CFCs的空间分布。

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引用次数: 0

Mapping potential benthic habitats of the Rio Grande Rise, SW Atlantic 绘制大西洋西南部大隆起的潜在底栖生物栖息地

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Deep-Sea Research Part I-Oceanographic Research Papers

Pub Date : 2025-10-29 DOI: 10.1016/j.dsr.2025.104619

Maria Aline Lisniowski , Victor Hugo Rocha Lopes , Eugênio Pires Frazão , Clóvis Coutinho Motta Neto , Vadim Harlamov , Arthur Ayres Neto

The Rio Grande Rise (RGR), a large and complex submarine feature in the southwestern Atlantic Ocean, was systematically mapped to investigate its geomorphology, substrate heterogeneity, and benthic habitat distribution. High-resolution multibeam bathymetry provided the basis for deriving terrain variables, used to classify major geomorphic units, including plateaus, ridges, and canyons. Seafloor backscatter mosaics and video imagery, analyzed with object-based image analysis, revealed distinct substrate types including ferromanganese crusts, foraminiferal sands, and pteropod shell beds. Bedforms, such as polygonal patterns, circular depressions, and waveforms, indicate active bottom currents and potential fluid migration that shape the terrain. Faunal assemblages differed markedly across habitat types, showing clear associations with substrate and local geomorphology. Patchy sediments on gentle slopes support diverse assemblages with complex trophic dynamics involving mobile predators, scavengers, and a range of invertebrates. Muddy flats and slopes enriched in organic matter host detritivores and burrowing fauna adapted to unconsolidated substrates. Sessile suspension feeders, including corals, sponges, echinoderms, and ascidians, dominated hard-substrate plateaus exposed to hydrodynamic activity. Slopes shaped by gravitational processes and covered with unsorted sediments host opportunistic species sharing functional traits with assemblages from patchy sediment habitats. The resulting habitat map provides a spatial framework for benthic environments across the RGR and documents marked habitat heterogeneity. The absence of systematic biological and sediment sampling constrains the resolution of habitat classification and some areas and taxa were under-sampled. Nevertheless, the outcomes establish a valuable environmental baseline that can guide future research, conservation planning, and resource management in the deep sea.

对大西洋西南海域一个大型复杂海底地貌——里约热内卢大隆起（里约热内卢Grande Rise， RGR）进行了系统地形图绘制，研究了其地貌、底物异质性和底栖生物栖息地分布。高分辨率多波束测深为获取地形变量提供了基础，用于对主要地貌单元进行分类，包括高原、山脊和峡谷。通过对海底后向散射马赛克和视频图像进行基于物体的图像分析，揭示了不同的基底类型，包括锰铁结壳、有孔虫砂和翼足类壳床。多角形图案、圆形凹陷和波形等床型表明活跃的底流和潜在的流体迁移，它们塑造了地形。不同生境类型的动物组合差异显著，与底物和当地地貌有明显的联系。缓坡上的斑驳沉积物支持着具有复杂营养动力学的多种组合，包括移动捕食者、食腐动物和一系列无脊椎动物。淤泥滩地和斜坡富含有机质、寄主、营养动物和适应松散基质的穴居动物。无柄悬浮食性动物，包括珊瑚、海绵、棘皮动物和海鞘动物，主要是受水动力活动影响的硬底高原。由重力作用形成的斜坡上覆盖着未分选的沉积物，这些斜坡上的机会物种与斑块状沉积物栖息地的组合具有相同的功能特征。由此产生的栖息地地图为整个RGR的底栖生物环境提供了一个空间框架，并记录了栖息地的异质性。由于缺乏系统的生物和沉积物采样，限制了生境分类的确定，一些地区和分类群采样不足。尽管如此，研究结果为指导未来的深海研究、保护规划和资源管理建立了有价值的环境基线。

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引用次数: 0

Tracking blind journey in the deep-sea: origin and evolutionary history of the Typhlotanaidae (Crustacea: Tanaidacea) 深海盲行追踪：斑藻科的起源与进化史（甲壳纲：斑藻科）

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Deep-Sea Research Part I-Oceanographic Research Papers

Pub Date : 2025-10-24 DOI: 10.1016/j.dsr.2025.104608

Marta Gellert , Magdalena Błażewicz , Tomasz Mamos , Graham J. Bird

The Typhlotanaidae are regarded as one of the most diverse families within the suborder Tanaidomorpha; their actual diversity and evolutionary history remain poorly understood. To elucidate the evolutionary history within this group, we analysed three molecular markers, i.e., the mitochondrial cytochrome oxidase I (COI), the nuclear 18S rRNA, and histone 3 (H3) gene. This represents the first phylogenetic investigation of the family Typhlotanaidae and, more broadly, the first molecular attempt to reconstruct evolutionary relationships within the suborder Tanaidomorpha. The phylogenetic reconstruction revealed the polyphyletic nature of the Typhlotanaidae, leading to elevation of two genera to family rank. Furthermore, by applying an integrative approach that combined molecular and morphological evidence, three new typhlotanaid subfamilies were defined, one subfamily was re-established, and two new genera were erected. As a result of this study, the number of species included in the Typhlotanaidae has considerably reduced, with the family now comprising 119 valid species.

斑蝶科被认为是斑蝶亚目中最多样化的科之一；它们的实际多样性和进化历史仍然知之甚少。为了阐明这一群体的进化历史，我们分析了三个分子标记，即线粒体细胞色素氧化酶I (COI)，核18S rRNA和组蛋白3 （H3）基因。这代表了斑竹科的第一次系统发育研究，更广泛地说，是重建斑竹亚目进化关系的第一次分子尝试。系统发育的重建揭示了蝗科的多系性，导致两个属的科级上升。在此基础上，采用分子和形态证据相结合的综合方法，确定了3个新的斑虱亚科，重建了1个亚科，建立了2个新属。这项研究的结果是，蝗科的物种数量大大减少，目前该科包括119种有效物种。

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引用次数: 0

Against all odds: Arctic squid (Cephalopoda, Oegopsida: Gonatus fabricii) reproduce under ice in the central polar Basin 克服重重困难：北极鱿鱼（头足纲，大足纲：Gonatus fabricii）在极地中部盆地的冰下繁殖

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Deep-Sea Research Part I-Oceanographic Research Papers

Pub Date : 2025-10-23 DOI: 10.1016/j.dsr.2025.104618

Alexey V. Golikov , Henk-Jan Hoving , Olga L. Zimina , Rushan M. Sabirov

Gonatus fabricii is the most abundant cephalopod in the Arctic. Its biomass equals that of commercial fishes in the Nordic Basin and supports many predators. It is the only squid that reproduces in the Arctic, where its spawning is known from several geographically confined areas. However, relevant records from the most northern part of its distribution are restricted to one spent female and one paralarva that were both caught in the early 1960s. We describe the reproductive characteristics of a spent female that was encountered at the surface (= ice mooring) in the Amundsen Basin in 2023. It confirms that G. fabricii has low potential (8800–16200 oocytes) and realised fecundity (25–28 % of potential fecundity, 2500–3000 oocytes) compared to most other studied deep-sea squids. Combining this observation with historical records (from 1960s to 2020), we show that G. fabricii might reproduce in the Central Polar Basin, and suggest a spawning area of G. fabricii that encompasses the central Amunsden Basin, eastern Lomonosov Ridge and eastern Makarov Basin. These records demonstrate that G. fabricii is the only nekton species that reproduces in the deep waters of the Central Polar Basin. The Central Polar Basin is the only spawning area of G. fabricii, where its two main whale predators (sperm whale and northern bottlenose whale) do not occur. The absence of predators’ pressure may be among the main reasons that drove G. fabricii from the warmer and more productive Nordic Basin to the colder and less productive Central Polar Basin.

Gonatus fabricii是北极最丰富的头足类动物。它的生物量相当于北欧盆地的商业鱼类，并支持许多捕食者。它是唯一在北极繁殖的鱿鱼，在几个地理上有限的区域都知道它的产卵。然而，其分布最北部的相关记录仅限于在20世纪60年代初捕获的一只雌性花蚊和一只幼虫。我们描述了2023年在阿蒙森盆地（Amundsen Basin）表面（=冰系泊）遇到的一只雌性鲸鱼的生殖特征。研究证实，与大多数其他研究的深海鱿鱼相比，G. fabricii具有较低的潜力（8800-16200个卵母细胞）和已实现的繁殖力（25 - 28%的潜在繁殖力，2500-3000个卵母细胞）。结合20世纪60年代至2020年的历史记录，我们认为fabicii可能在极地中部盆地繁殖，并提出了一个包括Amunsden盆地中部、Lomonosov Ridge东部和Makarov盆地东部的fabicii产卵区。这些记录表明，G. fabricii是唯一一种在中极盆地深水中繁殖的浮游生物。中央极地盆地是G. fabricii唯一的产卵区，那里没有它的两种主要捕食者（抹香鲸和北方宽吻鲸）。没有捕食者的压力，可能是导致G. fabricii从温暖、高产的北欧盆地迁移到寒冷、低高产的极地中部盆地的主要原因之一。

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引用次数: 0

Latitudinal transitions of eddy-affected zooplankton abundance in the mid-latitude North Atlantic 北大西洋中纬度涡旋影响浮游动物丰度的纬向转变

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Deep-Sea Research Part I-Oceanographic Research Papers

Pub Date : 2025-10-17 DOI: 10.1016/j.dsr.2025.104605

Guiyan Han , Graham D. Quartly , Hui Wang , Jie Yang , Ge Chen

Mesoscale eddies play a critical role in marine ecosystems by regulating ocean environments and thereby influencing marine life. By integrating zooplankton observations from the Continuous Plankton Recorder (CPR) project with satellite-derived sea surface temperature (SST), chlorophyll (Chl) concentration, and eddy datasets based on sea surface height, we investigate the impacts of eddy populations on zooplankton community abundance in the North Atlantic. To comprehensively assess both the abundance and richness of zooplankton communities, we introduced the Abundance Index as a unifying metric. The mid-latitude North Atlantic is segmented into three latitudinal zones: the southern zone (35°N–45°N), the middle zone (45°N–55°N), and the northern zone (55°N–70°N). Our analysis revealed distinct annual variations in the Abundance Index across the three zones from 1993 to 2017. The Abundance Index was consistently higher within cyclonic eddy (CE) cores compared with anticyclonic eddy (AE) cores in the southern and northern zones, contrasting with the patterns in the middle zone. However, the composite patterns of eddy-affected Chl and SST were similar across all zones. By employing six machine learning models, we assessed the feature importance (FI) of log-transformed Chl (log-Chl) and SST in explaining the Abundance Index. Log-Chl was found to have a greater impact than SST, particularly in the northern zone, highlighting the greater importance of food availability relative to ambient temperature. Significant shifts in the Abundance Index differences between AE and CE cores were detected in 1998, 2002, and 2003 in the southern, middle, and northern zones, respectively, suggesting that optimal habitats may have shifted in response to ocean climate change. These findings provide deeper insights into the effects of mesoscale eddies on zooplankton communities and highlight their broader implications for marine ecosystem dynamics.

中尺度涡旋通过调节海洋环境从而影响海洋生物，在海洋生态系统中起着至关重要的作用。通过将连续浮游生物记录仪（CPR）项目的浮游动物观测数据与卫星获取的海表温度（SST）、叶绿素（Chl）浓度和基于海面高度的涡旋数据集相结合，研究了涡旋种群对北大西洋浮游动物群落丰度的影响。为了综合评价浮游动物群落的丰度和丰富度，我们引入了丰度指数作为统一的度量标准。北大西洋中纬度地区被划分为三个纬度区：南区（35°N - 45°N）、中区（45°N - 55°N）和北区（55°N - 70°N）。我们的分析显示，从1993年到2017年，三个区域的丰度指数有明显的年度变化。南区和北区气旋涡旋（CE）核的丰度指数均高于反气旋涡旋（AE）核，而中部则相反。然而，涡旋影响的Chl和SST的复合模式在所有区域是相似的。通过使用6个机器学习模型，我们评估了对数变换Chl （log-Chl）和海表温度在解释丰度指数中的特征重要性（FI）。研究发现，logchl比海温的影响更大，特别是在北部地区，这突出了相对于环境温度而言食物供应的重要性。1998年、2002年和2003年，南区、中区和北区的AE和CE岩心丰度指数差异发生了显著变化，表明最优生境可能因海洋气候变化而发生了变化。这些发现为中尺度涡旋对浮游动物群落的影响提供了更深入的见解，并强调了它们对海洋生态系统动力学的更广泛影响。

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引用次数: 0

Developing Ireland's ocean observatory network: feasibility and suitability of using a SoundTrap HF300 for passive acoustics from an underwater glider 发展爱尔兰海洋观测网：使用SoundTrap HF300进行水下滑翔机被动声学的可行性和适用性

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Deep-Sea Research Part I-Oceanographic Research Papers

Pub Date : 2025-10-17 DOI: 10.1016/j.dsr.2025.104607

Morgane Pommier , Baptiste Menetrier , Ross O'Neill , Kieran Adlum , Diego del Villar , Niall Ó Maoiléidigh , Frederick Whoriskey , Ross McGill , Simon Berrow , Joanne O'Brien

Autonomous platforms, notably remotely operated underwater gliders, are increasingly used in ocean monitoring. Submersible gliders are robust, cost-effective, have a low carbon footprint, and operate relatively quietly. They enable extended-duration (months) ambient noise measurements and soundscape characterisation over large spatial scales, and are, as a result, promising tools for cetacean passive acoustic monitoring (PAM). Here, we assessed the feasibility of using a commercially available, self-contained recording system (SoundTrap HF300) mounted on a submersible glider to conduct PAM for cetacean calls in coastal European waters. Harbour porpoises and delphinids were successfully recorded during two trial missions over the Malin Shelf. Manual validation of dolphin whistles provided quantification of the rate of false positive detections. Additionally, it allowed a description of submersible glider self-noise that could potentially interfere with the automated detection algorithm or soundscape analysis. We provide recommendations to plan future missions and advocate for a more systematic implementation of this approach in Irish waters in the future.

自主平台，特别是远程操作的水下滑翔机，越来越多地用于海洋监测。潜水滑翔机坚固耐用，成本效益高，碳足迹低，运行相对安静。它们可以在大空间尺度上进行长时间（数月）的环境噪声测量和声景表征，因此是鲸类被动声学监测（PAM）的有前途的工具。在这里，我们评估了在欧洲沿海水域使用安装在潜水滑翔机上的商用、独立录音系统（SoundTrap HF300）对鲸类动物叫声进行PAM的可行性。在马林海架的两次试验任务中，成功地记录了港湾鼠海豚和海豚。人工验证海豚哨提供了假阳性检出率的量化。此外，它还允许对潜水滑翔机的自噪声进行描述，这些噪声可能会干扰自动检测算法或音景分析。我们提出建议，规划未来的任务，并倡导今后在爱尔兰水域更系统地实施这种方法。

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引用次数: 0

High genetic connectivity of the two main cold-water scleractinian framework engineers from the Southwestern Atlantic 来自西南大西洋的两种主要的冷水硬核框架工程师的高遗传连通性

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Deep-Sea Research Part I-Oceanographic Research Papers

Pub Date : 2025-10-16 DOI: 10.1016/j.dsr.2025.104606

Kátia Cristina Cruz Capel , Pedro Leocorny , Raphael de Mello Carpes , Marcelo Visentini Kitahara , Carla Zilberberg

Cold-water coral reefs (>150 m) are highly biodiverse ecosystems mainly engineered by few scleractinian and Porifera species. Due to the low number of framework building scleractinian species combined with their low growth rates, cold-water reefs are considered vulnerable marine ecosystems susceptible to human impacts such as demersal fisheries. Apart from their occurrence, a seminal information that subsidizes best practices for their conservation is related to gene flow/population genetics. However, research on the latter is hampered by the expensive sampling logistics and, to date, most studies have focused on the North Atlantic. Here we use microsatellite markers to understand the genetic diversity and population structure of the most important cold-water framework builders in the Southwestern Atlantic, Desmophyllum pertusum and Solenosmilia variabilis. The genotyping of 285 specimens belonging to both species showed low clonality rates, high levels of genetic diversity with no evidence of inbreeding, and no population structure along a latitudinal gradient of nearly 700 km, similar to what has been previously observed for the sympatric species Madrepora oculata and M. piresae. The recurrent absence of population structure for cold-water corals in the Southwestern Atlantic along latitudinal and depth ranges, suggests that oceanographic factors, such as the direction and speed of the Western South Atlantic Central Water and of the Antarctic Intermediate Water, combined with the spawning "window" and the pelagic larval duration (PLD) of these species play crucial roles in their dispersion and connectivity patterns.

冷水珊瑚礁（水深150米）是一种高度生物多样性的生态系统，主要由少数硬核虫和多孔虫组成。由于构建框架的硬核物种数量少，加上它们的生长速度低，冷水珊瑚礁被认为是脆弱的海洋生态系统，容易受到人类的影响，如底栖渔业。除了它们的发生之外，与基因流动/群体遗传学有关的一个重要信息补贴了它们保护的最佳实践。然而，对后者的研究受到昂贵的采样物流的阻碍，迄今为止，大多数研究都集中在北大西洋。本研究利用微卫星标记研究了西南大西洋最重要的冷水框架构建者Desmophyllum pertusum和Solenosmilia variabilis的遗传多样性和群体结构。这两个物种的285个标本的基因分型结果显示，它们的克隆率低，遗传多样性水平高，没有近亲繁殖的证据，在近700 km的纬度梯度上没有种群结构，与之前对同域物种Madrepora culata和M. piresae的观察结果相似。西南大西洋冷水珊瑚在纬度和深度范围内的种群结构反复缺失，表明海洋因素，如南大西洋西部中部水域和南极中间水域的方向和速度，结合这些物种的产卵“窗口”和远洋幼虫期（PLD），对它们的分散和连通性模式起着至关重要的作用。

{"title":"High genetic connectivity of the two main cold-water scleractinian framework engineers from the Southwestern Atlantic","authors":"Kátia Cristina Cruz Capel , Pedro Leocorny , Raphael de Mello Carpes , Marcelo Visentini Kitahara , Carla Zilberberg","doi":"10.1016/j.dsr.2025.104606","DOIUrl":"10.1016/j.dsr.2025.104606","url":null,"abstract":"<div><div>Cold-water coral reefs (>150 m) are highly biodiverse ecosystems mainly engineered by few scleractinian and Porifera species. Due to the low number of framework building scleractinian species combined with their low growth rates, cold-water reefs are considered vulnerable marine ecosystems susceptible to human impacts such as demersal fisheries. Apart from their occurrence, a seminal information that subsidizes best practices for their conservation is related to gene flow/population genetics. However, research on the latter is hampered by the expensive sampling logistics and, to date, most studies have focused on the North Atlantic. Here we use microsatellite markers to understand the genetic diversity and population structure of the most important cold-water framework builders in the Southwestern Atlantic, <em>Desmophyllum pertusum</em> and <em>Solenosmilia variabilis</em>. The genotyping of 285 specimens belonging to both species showed low clonality rates, high levels of genetic diversity with no evidence of inbreeding, and no population structure along a latitudinal gradient of nearly 700 km, similar to what has been previously observed for the sympatric species <em>Madrepora oculata</em> and <em>M. piresae</em>. The recurrent absence of population structure for cold-water corals in the Southwestern Atlantic along latitudinal and depth ranges, suggests that oceanographic factors, such as the direction and speed of the Western South Atlantic Central Water and of the Antarctic Intermediate Water, combined with the spawning \"window\" and the pelagic larval duration (PLD) of these species play crucial roles in their dispersion and connectivity patterns.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"226 ","pages":"Article 104606"},"PeriodicalIF":2.1,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145365509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deep-sea biotope classification using opportunistic sampling: insights for future management 利用机会取样的深海生物群落分类：对未来管理的见解

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Deep-Sea Research Part I-Oceanographic Research Papers

Pub Date : 2025-10-08 DOI: 10.1016/j.dsr.2025.104604

Heidy Q. Dias , Kerstin Kröger , Andrew J. Wheeler , Riccardo Arosio , Audrey Recouvreur , Tim P. Le Bas , Isobel A. Yeo , Patrick C. Collins

An iterative approach to optimise deep-sea biotope classification using a combination of acoustic data and Remotely Operated Vehicle (ROV) video footage was developed and tested at the Tropic Seamount site in the Northeast Atlantic. Two methods for biotope classification were compared: a top-down approach based on acoustic substrate classification followed by biological characterisation, and a bottom-up approach using multivariate analysis of biological assemblages only. Video transects were analysed at two spatial resolutions (200 m and 50 m segments) to assess scale effects on biotope delineation. Biotopes were classified using a combination of geological and biological data with each biotope representing a distinct combination of substrate types and their associated benthic assemblages. The bottom-up approach using 50 m segments identified 12 distinct biotopes with stronger environmental correlations compared to broader classifications at 200 m scale. This study demonstrates that shorter transects (50 m) combined with bottom-up sampling approaches are preferable for capturing the ecological heterogeneity characteristic of deep-sea seamount environments, with important implications for vulnerable marine ecosystem identification and spatial management.

研究人员在东北大西洋的Tropic Seamount海域开发并测试了一种利用声学数据和遥控潜水器（ROV）视频片段相结合的优化深海生物群落分类的迭代方法。比较了两种生物群落分类方法：基于声学基底分类的自上而下方法和基于生物特征的自下而上方法，以及仅使用生物组合的多变量分析的自下而上方法。以两种空间分辨率（200米和50米片段）对视频样带进行分析，以评估尺度效应对生物群落圈定的影响。利用地质和生物数据的组合对生物群落进行分类，每个生物群落代表了基质类型及其相关底栖生物组合的独特组合。与在200米尺度上进行更广泛的分类相比，自下而上的方法在50米尺度上确定了12种不同的生物群落，它们具有更强的环境相关性。该研究表明，较短的样带（50 m）结合自下而上的采样方法可以更好地捕捉深海海山环境的生态异质性特征，对海洋脆弱生态系统的识别和空间管理具有重要意义。

{"title":"Deep-sea biotope classification using opportunistic sampling: insights for future management","authors":"Heidy Q. Dias , Kerstin Kröger , Andrew J. Wheeler , Riccardo Arosio , Audrey Recouvreur , Tim P. Le Bas , Isobel A. Yeo , Patrick C. Collins","doi":"10.1016/j.dsr.2025.104604","DOIUrl":"10.1016/j.dsr.2025.104604","url":null,"abstract":"<div><div>An iterative approach to optimise deep-sea biotope classification using a combination of acoustic data and Remotely Operated Vehicle (ROV) video footage was developed and tested at the Tropic Seamount site in the Northeast Atlantic. Two methods for biotope classification were compared: a top-down approach based on acoustic substrate classification followed by biological characterisation, and a bottom-up approach using multivariate analysis of biological assemblages only. Video transects were analysed at two spatial resolutions (200 m and 50 m segments) to assess scale effects on biotope delineation. Biotopes were classified using a combination of geological and biological data with each biotope representing a distinct combination of substrate types and their associated benthic assemblages. The bottom-up approach using 50 m segments identified 12 distinct biotopes with stronger environmental correlations compared to broader classifications at 200 m scale. This study demonstrates that shorter transects (50 m) combined with bottom-up sampling approaches are preferable for capturing the ecological heterogeneity characteristic of deep-sea seamount environments, with important implications for vulnerable marine ecosystem identification and spatial management.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"225 ","pages":"Article 104604"},"PeriodicalIF":2.1,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145266257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0