Progress in Oceanography最新文献_第8页

First record of deep-sea phoronids from the Sea of Okhotsk with description of Phoronopsis deprofundis sp.nov. and phoronidization of the ocean communities 鄂霍次克海深海栉虫的首次记录及对深海栉虫的描述。以及海洋群落的磷化

IF 3.6 3区地球科学 Q1 OCEANOGRAPHY

Progress in Oceanography

Pub Date : 2025-10-22 DOI: 10.1016/j.pocean.2025.103592

Boris Neklyudov , Zhanna Osipova , Sergey Galkin , Tatiana Belan , Elena Temereva

Active exploration of sea depths became possible in recent years because of increased technical capabilities. It has already led to a number of scientific and economically significant discoveries. In this paper, we have described a first record of deep-sea phoronids found in the Sea of Okhotsk at depths from 786 to 1551 m. The Phoronida is a phylum of invertebrates which includes 15 species of benthic worm-like animals. Most of phoronids have worldwide distribution and are known from different seas of the ocean. In some areas phoronids are extremely abundant and define the composition of benthic communities. Phoronids are mostly shallow water inhabitants: up to date their deepest location of finding was 390 m depth. This report uses light microscopy, scanning electron microscopy, and 3D reconstructions to describe a first deep-sea phoronid species, Phoronopsis deprofundis sp.nov. This species shares some common traits of morphology and reproductive biology with other species of Phoronopsis genera: feather-like longitudinal muscles and the presence of epidermal collar at the base of the lophophore. P. deprofundis exhibits some features which are mostly common with Phoronopsis albomaculata and Phoronopsis harmeri, however, it has unique combination of morphological features and should be considered as new phoronid species. Based on histological data it was proposed that the reproduction period of deep-sea phoronids occurs at the end of May – beginning of June. The cladistic analysis was carried out on morphological traits for phoronid adults and larvae, the characteristics of development and reproductive biology and the type of preferred substrate. However many white spots in morphological data still exist, especially in larval morphology. The taxonomy of phylum Phoronida should be reinvestigated and new taxa at order or family level should be established. Based on our new data and analysis of the literature, we can conclude that phoronidization of oceanic communities is taking place – phoronids are actively expanding their habitat and also occupy new water area, in which they were not registered before.

近年来，由于技术能力的提高，对深海的积极勘探成为可能。它已经带来了许多科学和经济上的重大发现。在本文中，我们描述了在鄂霍次克海786 ~ 1551米深度发现的深海栉水母的第一个记录。栉虫纲是一门无脊椎动物，包括15种底栖蠕虫类动物。大多数栉水母分布在世界各地，在大洋的不同海域都有发现。在某些地区，栉虫极其丰富，并确定了底栖生物群落的组成。Phoronids大多是浅水居民：到目前为止，它们发现的最深位置是390米深。本报告使用光学显微镜、扫描电子显微镜和三维重建来描述第一个深海栉虫物种——栉虫sp.nov。本种在形态和生殖生物学上与其他种类有一些共同的特征：羽毛状的纵向肌肉和表皮环的存在。P. deprofundis表现出与褐光拟南芥（Phoronopsis albomaculata）和绿光拟南芥（Phoronopsis harmeri）共同的一些特征，但又具有独特的形态特征组合，应视为一种新的拟南芥。根据组织学资料，认为深海鳞鱼的繁殖期在5月底至6月初。对成虫和幼虫的形态特征、发育和生殖生物学特征以及首选基质类型进行了枝系分析。然而，形态学资料中仍存在许多白点，特别是在幼虫形态中。应重新研究该门的分类，并在目或科水平上建立新的分类群。根据我们的新数据和对文献的分析，我们可以得出结论，海洋群落正在发生磷化-磷化生物正在积极扩大其栖息地，并占据以前未登记的新水域。

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引用次数: 0

Layered circulation and dynamics of the Philippine Sea 菲律宾海的层状环流和动力学

IF 3.6 3区地球科学 Q1 OCEANOGRAPHY

Progress in Oceanography

Pub Date : 2025-10-20 DOI: 10.1016/j.pocean.2025.103597

Linlin Liang , Jianping Gan , Hiusuet Kung , Chiwing Rex Hui

Using well-validated ocean circulation model for the Philippine Sea, this study reveals anticyclonic circulation in the upper (<500 m) and middle layers (500–2400 m), and a cyclonic circulation in the deep layer (>2400 m). Layer-integrated vorticity budget diagnostics show that lateral planetary vorticity flux serves as the primary source for the circulation patterns in the surface and deep layers, whereas the lateral and vertical relative vorticity fluxes sustain the circulation in the middle layer, indicating that extrinsic dynamics primarily drive the three-layer circulation. The joint effect of baroclinicity and relief (

JEBAR)

, an intrinsic dynamic response to the deep cyclonic circulation, forms when the bottom flow interacts with the topography of the Philippine Sea. The lateral mass flux divergence in the three sub-basins of the Philippine Sea induces a basin-wide upward motion. Collectively, the interplay between extrinsic forcing and intrinsic flow-topography interaction jointly regulate the layered circulation within the Philippine Sea.

本研究利用经过验证的菲律宾海环流模式，揭示了上层（<500 m）和中层（500 - 2400 m）的反气旋环流，以及深层（>2400 m）的气旋环流。层积分涡度预算诊断结果表明，行星侧向涡度通量是地表和深层环流型的主要来源，而中层环流型主要由横向和垂直相对涡度通量维持，表明外在动力主要驱动三层环流。当底部气流与菲律宾海地形相互作用时，就形成了斜压和起伏联合效应（JEBAR），这是深层气旋环流的内在动力响应。菲律宾海三个子盆地的横向质量通量辐散引起了一个全盆地范围的上升运动。外在强迫和内在流动-地形相互作用共同调节着菲律宾海的层状环流。

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引用次数: 0

Population structure study across the North Pacific for representatives of the deep-sea family Neotanaidae (Crustacea: Peracarida) reveals cryptic species separated by depth and geographical distance 横跨北太平洋的深海科Neotanaidae（甲壳纲：Peracarida）代表的种群结构研究揭示了由深度和地理距离分开的隐种

IF 3.6 3区地球科学 Q1 OCEANOGRAPHY

Progress in Oceanography

Pub Date : 2025-10-18 DOI: 10.1016/j.pocean.2025.103595

Emma Palacios Theil, Andrea Desiderato, Serena Mucciolo, Magdalena Błażewicz

Neotanaids are deep-sea benthic peracarids. As such, they lack a planktonic larval stage, what, together with their relatively small sizes and lack of swimming adaptations, confers them a priori low dispersal abilities. Other peracarids with low swimming abilities, for example isopods of the families Nannoniscidae and Desmosomatidae, show generally distribution ranges of about 500 km. Nevertheless, recent population structure analyses based on molecular markers (COI and 16S) have revealed a neotanaid North Pacific species with a distribution range of more than 2500 km. The species was collected in the western North Pacific, in the Sea of Okhotsk in 2015 during the SokhoBio campaign, and in 2022 in the eastern North Pacific, in the Aleutian Basin, during the AleutBio scientific cruise. During this latter campaign, additional neotanaids were recorded from deeper waters south of the Aleutian Islands, specifically at three stations at the northern slope of the Aleutian Trench (4215–4501 m depth), as well as at seven stations in the trench itself and at the southern slope (5100–6954 m depth). Species delimitation analyses have shown that these neotanaids belong to different taxonomic units, sorted not only by geographical location, but also by their depths. Two groups of neotanaids sampled only 50 km apart belong to different species, separated by depth. These findings indicate that previous assumptions about neotanaids having low dispersal abilities might need to be re-evaluated. In addition, further analyses of other neotanaid species with unusually large depth ranges, especially those clearly surpassing the turnover point for depth zonation in marine ecosystems (at a depth of about 4000 m), such as Neotanais affinis, N. hadalis, or N. armiger, will most likely reveal additional cryptic species in the future.

新古生虫是深海底栖过鳃虫。因此，它们没有浮游生物的幼虫阶段，再加上它们相对较小的体型和缺乏游泳适应能力，使它们的传播能力先天较低。其他游动能力较弱的甲壳纲动物，如水蛭科和刺虫科等足类，其分布范围一般在500公里左右。然而，最近基于分子标记（COI和16S）的种群结构分析发现了一个分布范围超过2500公里的新tanaid北太平洋物种。该物种于2015年在SokhoBio活动期间在北太平洋西部的鄂霍次克海被收集，并于2022年在北太平洋东部的阿留申盆地被收集，在阿留申生物科学巡航期间。在后一个战役中，在阿留申群岛以南更深的水域记录了更多的新塔尼德，特别是在阿留申海沟北坡的三个站点（深度为4215-4501米），以及海沟本身和南坡的七个站点（深度为5100-6954米）。物种划分分析表明，这些新古猿属不同的分类单位，不仅按地理位置分类，而且按其深度分类。两组相距仅50公里的新古猿标本，按深度划分，属于不同的物种。这些发现表明，以前关于新第三系生物具有低传播能力的假设可能需要重新评估。此外，进一步分析其他具有异常大深度范围的新物种，特别是那些明显超过海洋生态系统中深度带转换点的物种（深度约为4000 m），如Neotanais affinis， N. hadalis或N. armiger，很可能在未来发现更多的隐物种。

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引用次数: 0

Hidden diversity in the deep North Pacific and Atlantic: New taxa and a revised subfamilial framework of Akanthophoreidae (Crustacea: Tanaidacea) 北太平洋和大西洋深处隐藏的多样性：Akanthophoreidae的新分类群和修订的亚科框架（甲壳纲：tanaidae）

IF 3.6 3区地球科学 Q1 OCEANOGRAPHY

Progress in Oceanography

Pub Date : 2025-10-18 DOI: 10.1016/j.pocean.2025.103591

Głuchowska Kamila , Błażewicz Magdalena

Tanaidaceans of the family Akanthophoreidae are a morphologically diverse group of peracarid crustaceans inhabiting deep-sea environments. However, their true diversity and evolutionary relationships remain poorly resolved. In this study, we examine material collected from the North Pacific and Atlantic to investigate the phylogenetic structure of Akanthophoreidae using morphological data and 18S rRNA gene sequences. Our results confirm the monophyly of the family and support its subdivision into three morphologically and genetically distinct subfamilies: Akanthophoreinae Sieg, 1986, Chauliopleoninae subfam. nov., and Stenotanainae subfam. nov. We provide formal diagnoses for each subfamily and revise the genus Stenotanais, describing two new species from the North Pacific. In addition, we establish a new genus to accommodate four new species. Species of Stenotanainae were collected from depths ranging from 805 to 5740 m across the Clarion-Clipperton Zone, Kuril-Kamchatka and Aleutian Trenches, and the northwest Atlantic margin. The discovery of Stenotanainae in both the Pacific and Atlantic extends the known distribution of this group and suggests greater inter-basin connectivity than previously assumed. In total, the number of recognised species in Akanthophoreidae increases from 56 to 62, and the number of genera from ten to eleven. This study highlights the utility of integrative taxonomy in uncovering hidden deep-sea biodiversity and provides a revised phylogenetic framework for future research on the evolutionary history of Tanaidacea.

棘足纲是生活在深海环境中的一种形态多样的过壳纲动物。然而，它们真正的多样性和进化关系仍然没有得到很好的解决。在这项研究中，我们利用形态学数据和18S rRNA基因序列分析了从北太平洋和大西洋收集的材料，研究了Akanthophoreidae的系统发育结构。我们的研究结果证实了该家族的单一性，并支持其细分为三个形态和遗传上不同的亚科：Akanthophoreinae Sieg， 1986, Chauliopleoninae subfam。11 .;;;；11 .我们提供了每个亚科的正式诊断，并修订了Stenotanais属，描述了来自北太平洋的两个新种。此外，我们建立了一个新属，以容纳四个新种。在claron - clipperton带、kuril -堪察加海沟和阿留申海沟以及西北大西洋边缘的805 ~ 5740 m范围内采集了Stenotanainae种。在太平洋和大西洋发现的Stenotanainae扩展了该类群的已知分布，并表明盆地间的连通性比先前假设的要大。总的来说，已知的芋蚜科物种从56个增加到62个，属的数量从10个增加到11个。该研究突出了综合分类学在揭示隐藏的深海生物多样性方面的作用，并为进一步研究tanaidacia的进化史提供了一个修订的系统发育框架。

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引用次数: 0

Spatiotemporal patterns and environmental drivers of Meso- and Macrozooplankton communities on the Northern Antarctic Peninsula (2017–2019) 2017-2019年南极半岛中大型浮游动物群落时空格局及环境驱动因素

IF 3.6 3区地球科学 Q1 OCEANOGRAPHY

Progress in Oceanography

Pub Date : 2025-10-17 DOI: 10.1016/j.pocean.2025.103599

Letícia Cazarin Baldoni , Vanessa Ochi Agostini , Erik Muxagata

Identifying variations in species composition in marine environments is crucial for monitoring climate change, particularly on the Northern Antarctic Peninsula (NAP), one of the fastest warming regions on the planet. In this study, the spatial and vertical distributions of meso- and macrozooplankton in the Gerlache and Bransfield Straits and part of the Bellingshausen Sea over three austral summers (2017–2019) were examined. Water column structure influenced zooplankton composition, with higher abundances recorded at 200–300 m in 2018, which was linked to lower water column stability. Species dominance varied across years: in 2017, Salpa thompsoni dominated under warmer, more stratified conditions, which coincided with small phytoplankton such as cryptophytes and dinoflagellates. In 2018, cooler conditions and a deeper mixed layer favoured diatoms and copepods, including Metridia spp. copepodites. In 2019, greater stability related to lower surface salinity favoured cryptophytes and small copepod species such as Ctenocalanus citer and Oithona spp. in the Gerlache Strait, whereas diatoms and calanoid copepods remained dominant in Bransfield. Diel vertical migration influenced the distribution, with higher surface abundances at twilight and deeper distributions during the day, benefitting Metridia spp. This study emphasizes that interannual environmental variability shapes the zooplankton community structure on the NAP. The abundance of key taxa such as of Salpa thompsoni reflects broader oceanographic conditions and appears to suppress small copepods and early developmental stages, which became more abundant and ecologically relevant in its absence. The interannual variability of S. thompsoni linked to warmer surface waters and increased stratification may serve as an indicator of ecosystem responses to climate-driven oceanographic change.

确定海洋环境中物种组成的变化对于监测气候变化至关重要，特别是在地球上变暖最快的地区之一——南极北部半岛（NAP）。本文研究了2017-2019年南方3个夏季Gerlache海峡和Bransfield海峡以及部分海域中、大型浮游动物的空间和垂直分布特征。水柱结构影响浮游动物组成，2018年200-300米的浮游动物丰度较高，这与水柱稳定性较低有关。不同年份的物种优势各不相同：2017年，在更温暖、分层程度更高的条件下，汤普森萨尔帕（Salpa thompsoni）占主导地位，与此同时，小型浮游植物如隐生植物和鞭毛藻也占主导地位。2018年，较冷的环境和较深的混合层有利于硅藻和桡足类动物，包括Metridia spp. copepodites。2019年，与较低的表面盐度相关的更大稳定性有利于Gerlache海峡的隐生植物和小型桡足类物种，如Ctenocalanus citer和Oithona spp.，而硅藻和calanoid桡足类动物在Bransfield仍然占主导地位。昼夜垂直迁移影响了浮游动物群落的分布，黄昏时表层丰度较高，而白天分布较深，这有利于米tridia spp的分布。关键分类群如Salpa thompsoni的丰度反映了更广泛的海洋学条件，似乎抑制了小型桡足类和早期发育阶段，在缺乏它的情况下，它们变得更加丰富和生态相关。与地表水变暖和分层增加有关的S. thompsoni年际变率可作为生态系统对气候驱动的海洋变化响应的指标。

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引用次数: 0

Trenches apart, yet worm to worm: inter- and intra-trench comparisons reveal divergent and convergent dynamics in hadal nematode biodiversity 沟分开，但蠕虫对蠕虫：沟间和沟内的比较揭示了赤潮线虫生物多样性的发散和收敛动态

IF 3.6 3区地球科学 Q1 OCEANOGRAPHY

Progress in Oceanography

Pub Date : 2025-10-15 DOI: 10.1016/j.pocean.2025.103594

Yick Hang Kwan , Sofie Derycke , Blandine Trouche , Frank Wenzhöfer , Mathias Middelboe , Angelika Brandt , Mauricio Shimabukuro , Ronnie N. Glud , Daniela Zeppilli

The hadal zone, the deepest part of the global ocean, encompasses several extreme ecosystems with elevated biological activity, contrasting the general trend of declining biomass and biodiversity with increasing water depth. These bathymetrically isolated habitats act as depocenters and are characterized by high hydrostatic pressure and unique environmental conditions that provide an opportunity to fundamentally explore biogeographic patterns and the genetic diversity of deep-sea meiofauna, which remain poorly understood. In this study, we compared nematode communities in two geographically distant trench systems, the Aleutian Trench (North Pacific) and the South Sandwich Trench (South Atlantic), separated by 17 000 km. Environmental DNA (eDNA) sequencing targeting the ribosomal 18S region was combined with a metaphylogeography approach. Comparative analyses were performed for intra- and inter-trench, biodiversity and genetic differentiation across environmentally characterised trench-specific habitats. Our findings reveal evidence for the meiofauna paradox in hadal settings, demonstrating distinct nematode communities that appear to be shaped by availability and quality of food. Furthermore, environmental filtering appeared to contribute to assembly of habitat specific communities according to localised environmental condition. Finally, we observed shared haplotypes among some dominating nematode genera, suggesting potential connectivity between habitats associated within or even across hadal trenches might exist. Overall, this study provides valuable insights on how environmental factors drive nematode biodiversity and genetic diversity in the hadal realm. Environmental heterogeneity plays a pivotal role in shaping nematode communities, influencing their population structure and connectivity by creating spatially variable habitats that drive diversification, local adaptation, and gene flow patterns.

hadal是全球海洋最深的部分，包含了几个生物活性升高的极端生态系统，与生物量和生物多样性随着水深增加而下降的总体趋势形成鲜明对比。这些在水深上孤立的栖息地充当沉积中心，其特点是高静水压力和独特的环境条件，为从根本上探索深海小型动物的生物地理模式和遗传多样性提供了机会，这些仍然知之甚少。在这项研究中，我们比较了两个地理上遥远的海沟系统，阿留申海沟（北太平洋）和南桑威奇海沟（南大西洋），相隔17000公里的线虫群落。针对核糖体18S区域的环境DNA （eDNA）测序与变态地理方法相结合。对具有环境特征的特定海沟生境的海沟内和海沟间、生物多样性和遗传差异进行了比较分析。我们的研究结果揭示了在hadal环境中存在的微系悖论的证据，表明不同的线虫群落似乎是由食物的可获得性和质量决定的。此外，环境过滤似乎有助于根据局部环境条件聚集生境特定群落。最后，我们观察到一些优势线虫属之间存在共同的单倍型，这表明在hadal沟内甚至跨hadal沟的栖息地之间可能存在潜在的连通性。总的来说，本研究为环境因素如何驱动hadal领域的线虫生物多样性和遗传多样性提供了有价值的见解。环境异质性在塑造线虫群落、影响其种群结构和连通性方面发挥着关键作用，通过创造空间可变的栖息地来驱动多样化、地方适应和基因流动模式。

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引用次数: 0

Phytoplankton growth driven by submesoscale processes under convective turbulence: Lagrangian plankton model results 对流湍流下亚中尺度过程驱动的浮游植物生长：拉格朗日浮游生物模式结果

IF 3.6 3区地球科学 Q1 OCEANOGRAPHY

Progress in Oceanography

Pub Date : 2025-10-14 DOI: 10.1016/j.pocean.2025.103593

Yeonju Choi, Yign Noh, Hajoon Song

Submesoscale turbulence influences phytoplankton growth by enhancing upper-ocean stratification, nutrient entrainment, and horizontal tracer variability. However, the specific mechanisms and their relative contributions under convective forcing remain unclear. Here, we use large-eddy simulations coupled with a Lagrangian plankton model to quantify the physical and biological impacts of submesoscale turbulence across varying cooling intensities and nutrient levels, comparing cases with and without submesoscale turbulence. Under weak cooling with low nutrients, submesoscale turbulence enhances nutrient entrainment but initially suppresses growth by subducting phytoplankton into deeper, light-limited waters. As restratification progresses, greater surface retention yields net growth enhancement alongside higher nutrient supply. Conversely, when nutrients are abundant, submesoscale turbulence enhances light exposure and promotes growth. Under strong cooling conditions, convective mixing dominates, homogenizing tracers and diminishing submesoscale influence. Nonethelss, weak restratification from submesoscale turbulence still yields small gains in light exposure and growth. Additionally, horizontal heterogeneity suppresses growth when cooling is weak and nutrients are low, but is negligible otherwise. These findings highlight the need to represent interacting physical processes in ocean models. Simplified parameterizations that omit these interactions may misrepresent biological responses, especially under weak cooling.

亚中尺度湍流通过增强上层海洋分层、营养物夹带和水平示踪变率来影响浮游植物的生长。然而，具体机制及其在对流强迫下的相对贡献仍不清楚。在这里，我们使用大涡模拟和拉格朗日浮游生物模型来量化亚中尺度湍流在不同冷却强度和营养水平下的物理和生物影响，并比较有和没有亚中尺度湍流的情况。在低营养物质的弱冷却条件下，亚中尺度湍流增强了营养物质的携带，但最初通过将浮游植物俯冲到更深的、光照受限的水域来抑制生长。随着再酸化的进行，更大的表面保留产生净生长增强和更高的营养供应。相反，当营养丰富时，亚中尺度湍流增加光照，促进生长。在强冷却条件下，对流混合占主导地位，使示踪剂均匀化，亚中尺度影响减弱。尽管如此，来自亚中尺度湍流的微弱再气化仍然会在光照和生长方面产生小的增益。此外，水平异质性在冷却弱和营养低时抑制生长，但在其他情况下可以忽略不计。这些发现强调了在海洋模式中表现相互作用的物理过程的必要性。忽略这些相互作用的简化参数化可能会歪曲生物反应，特别是在弱冷却条件下。

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引用次数: 0

Hadal copepods in and around: A metabarcoding Survey of meiofauna in the Aleutian trench and adjacent regions 阿留申海沟及其邻近地区足桡足动物的元条形码调查

IF 3.6 3区地球科学 Q1 OCEANOGRAPHY

Progress in Oceanography

Pub Date : 2025-10-13 DOI: 10.1016/j.pocean.2025.103596

Frederic Bonk , Sahar Khodami , Angelika Brandt , Pedro Martínez Arbizu

Hadal trenches remain among the least explored marine environments, with much of their faunal diversity still unknown. It is still debated whether trenches act as dispersal barrier for benthic organisms potentially leading to distinct faunal communities within and around them. This study aimed to investigate the meiofauna diversity in and around the Aleutian trench using a multi-gene metabarcoding approach. Two genetic markers, CO1 and 18S, were used to assess the potential uniqueness of hadal, abyssal and bathyal habitats. To improve the accuracy of taxonomic assignments, a curated reference library of harpacticoid species was created. All sampling sites revealed unique meiofaunal communities; however, both markers consistently detected a clear separation between hadal and abyssal assemblages. While certain taxa were underrepresented in the CO1 dataset compared to 18S, likely due to primer bias, the overall patterns in community structure remained consistent. Besides depth, Chl-a (for CO1) and TOC (for 18S) emerged as key environmental factors influencing meiofauna community composition. Notably, eight COI OTUs were detected across sites spanning the trench, five of which were also detected in the Clarion-Clipperton Zone, suggesting that the trench does not necessarily act as a strict barrier to dispersal. One of these OTUs was assigned to genus Dorsiceratus − a taxon rarely encountered in previous deep-sea surveys − demonstrating the potential of metabarcoding, especially when combined with curated reference libraries, to reveal hidden biodiversity.

深海沟仍然是探索最少的海洋环境之一，它们的动物多样性仍然未知。海沟是否作为底栖生物的扩散屏障，可能导致它们内部和周围不同的动物群落，目前仍存在争议。本研究旨在利用多基因元条形码方法研究阿留申海沟及其周围的小型动物多样性。采用CO1和18S两种遗传标记来评估深海、深海和深海生境的潜在独特性。为了提高分类学鉴定的准确性，建立了一个精心策划的羽状螨类参考文库。所有取样点均显示出独特的小区系群落；然而，这两个标记都一致地检测到深海和深海组合之间的明显分离。与18S相比，CO1数据集中某些分类群的代表性不足（可能是由于引物偏倚），但群落结构的总体格局保持一致。除深度外，Chl-a（代表CO1）和TOC（代表18S）是影响微型动物群落组成的关键环境因子。值得注意的是，在横跨海沟的地点检测到8个COI otu，其中5个也在Clarion-Clipperton区检测到，这表明海沟并不一定是一个严格的扩散屏障。其中一个otu被分配给Dorsiceratus属，这是一个在以前的深海调查中很少遇到的分类群，这表明了元条形码的潜力，特别是当与精选参考图书馆结合使用时，可以揭示隐藏的生物多样性。

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引用次数: 0

The first record of Porcupinella profunda from the North Pacific, Aleutian Trench documents phylogenetic position in the Umbellulidae 在北太平洋阿留申海沟首次发现深Porcupinella profunda，记录了其在伞形科的系统发育位置

IF 3.6 3区地球科学 Q1 OCEANOGRAPHY

Progress in Oceanography

Pub Date : 2025-10-11 DOI: 10.1016/j.pocean.2025.103590

Yuka Kushida , Angelika Brandt , James Davis Reimer , Hiroki Kise , Angelo Poliseno

The genus Porcupinella belongs to the family Chunellidae and inhabits deep-sea environments. It currently includes two species: Porcupinella profunda, from the Atlantic Ocean, and Porcupinella tasmanica, reported from the Tasman Sea. Porcupinella species can be distinguished from other genera by their well-developed terminal polyp and their colony form, which features paired lateral autozooids on the distal portion of the rachis, resembling genus Umbellula of family Umbellulidae. Here, we report the first record of P. profunda from the Aleutian Trench, representing the first record from the Pacific Ocean, collected during the Aleut-Bio cruise in 2022, and discuss taxonomic issues among the families Chunellidae, Umbellulidae, and Scleroptilidae. Mitochondrial sequence data reveal a very close phylogenetic relationship of Porcupinella profunda to species of Umbellula (Umbellulidae).

豪猪属属于豪猪科，生活在深海环境中。它目前包括两个物种：来自大西洋的深孔豪猪和来自塔斯曼海的塔斯马尼亚豪猪。Porcupinella与其他属的区别在于其发育良好的末端息肉和集落形式，其特征是在轴的远端部分有成对的横向自虫，类似于伞形科的伞形属。本文报道了2022年阿留申-生物巡航期间在阿留申海沟收集到的第一个深海p.a prounda记录，代表了太平洋的第一个记录，并讨论了Chunellidae， Umbellulidae和Scleroptilidae的分类问题。线粒体序列数据揭示了深豪猪属（Porcupinella profunda）与伞形菌属（伞形菌科）的亲缘关系。

引用次数: 0

High connectivity of a new Eurycope (Asellota: Munnopsidae) species from Japanese waters and the Bering Sea with intraspecific genetic divergence among local populations 日本海域和白令海一新种的高连通性及当地种群间的种内遗传分化

IF 3.6 3区地球科学 Q1 OCEANOGRAPHY

Progress in Oceanography

Pub Date : 2025-10-11 DOI: 10.1016/j.pocean.2025.103588

Mizuki Ohta , Shigeaki Kojima , Stefanie Kaiser , Angelika Brandt

In this study, we describe a newly discovered species of Munnopsidae Lilljeborg, 1864 within the genus Eurycope Sars, 1864, expanding our understanding of deep-sea biodiversity and species connectivity in the Northern Pacific. The specimens were collected during three deep-sea expeditions in Japan and the Aleutian Trenches using Japanese and German research vessels. The new species can be distinguished from other congeners by a long rostrum without keel, well-developed distomedial projection of article 1 of antenna 1, ascending dorsal projections on pereonites 5–7, and distal concave margin of male pleopod 1. This species has well-developed swimming legs, suggesting a high swimming capability and thus, a wide distribution range, as reported for other munnopsid species in previous studies. This distribution may be influenced by some deep-sea currents that transport deep water masses northward along the western Pacific coast, eventually flowing into the Bering Sea via the eastern side of the Kamchatka Peninsula. In this study, we determined the partial nucleotide sequences of mitochondrial genes for cytochrome c oxidase subunit I (COI) and the 16S ribosomal RNA gene (16S rDNA). The constructed haplotype networks revealed intraspecific genetic divergence among the regional populations (COI: 5.4 % divergence, 16S rDNA: 2.7 % divergence of Kimura 2-parameter distance). We also constructed a new phylogenetic tree for some Eurycope munnopsids based on COI, 16S rDNA, and a nuclear 18S ribosomal RNA gene (18S rDNA) sequences. The concatenated tree suggests that the Pacific and Atlantic species form distinct lineages; however, more data are needed to further resolve this pattern.

在这项研究中，我们描述了一个新发现的物种Munnopsidae Lilljeborg， 1864在Eurycope Sars属，1864，扩大了我们对北太平洋深海生物多样性和物种连通性的认识。这些标本是由日本和德国的研究船在日本和阿留申海沟的三次深海探险中收集的。该新种与其他同类的区别在于：喙部长而无龙骨，触角1号第1条的远端突起发育良好，peronites 5-7上的背向上突起，雄性pleopod 1的远端凹缘。该物种游动腿发育良好，游动能力强，分布范围广，与以往研究中其他无肢纲动物的研究结果一致。这种分布可能受到一些深海洋流的影响，这些洋流沿着西太平洋海岸向北输送深水团，最终通过堪察加半岛的东侧流入白令海。在这项研究中，我们确定了线粒体细胞色素c氧化酶亚基I （COI）基因和16S核糖体RNA基因（16S rDNA）的部分核苷酸序列。构建的单倍型网络揭示了区域居群的种内遗传差异（COI: 5.4%的差异，16S rDNA: 2.7%的木村2参数距离差异）。基于COI、16S rDNA和核18S核糖体RNA基因（18S rDNA）序列，构建了一棵新的系统发育树。连接的树表明太平洋和大西洋的物种形成了不同的谱系；然而，需要更多的数据来进一步解决这个模式。

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