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Into the deep: diversity of valviferan isopods (Crustacea: Peracarida) from the Mar del Plata submarine canyon and adjacent area, Argentina 深入:阿根廷马德普拉塔海底峡谷及其邻近地区的valviferan等足类(甲壳纲:Peracarida)的多样性
IF 2.3 3区 地球科学 Q2 OCEANOGRAPHY Pub Date : 2025-08-01 Epub Date: 2025-05-07 DOI: 10.1016/j.dsr.2025.104515
Emanuel Pereira , Daniel Roccatagliata , María José Corriale , Brenda L. Doti
The present study investigates the diversity of the deep-sea Valvifera from the Mar del Plata submarine canyon and adjacent area (MdPSC-AA), Southwest Atlantic. Forty-one benthic samples collected between 250 and 3282 m depth during the “Talud Continental I–III” expeditions were studied. Valviferan isopods were recovered from 34 of the 41 samples collected. A total of 25 valviferan species were identified, which were distributed among four families: Antarcturidae (19 spp.), Austrarcturellidae (4 spp.), Idoteidae (1 sp.), and Pseudidotheidae (1 sp.). Eight new species, eight new geographic records and 11 new bathymetric records are reported. The number of species per haul was negatively associated with depth. Beta diversity showed a moderately high turnover of species across the depth gradient. The biogeographic analysis revealed that most of the species recorded from the MdPSC-AA were also reported from the slope of the Magellan Region (MR-slope). Novel associations between valviferan isopods and other invertebrates are documented.
本文研究了西南大西洋马德普拉塔海底峡谷及其邻近地区(MdPSC-AA)深海Valvifera的多样性。研究了“塔卢德大陆I-III”考察期间在250至3282米深度采集的41个底栖动物样本。在收集的41个样本中,有34个样本中发现了Valviferan等足类。共鉴定出有瓣蝇类25种,分布于4科:南极科(19种)、南蕨科(4种)、拟蕨科(1种)和拟蕨科(1种)。报道了8个新种、8个新地理记录和11个新水深记录。每次捕获的鱼种数量与深度呈负相关。β多样性在深度梯度上表现出较高的物种更替。生物地理分析表明,MdPSC-AA记录的大部分物种也来自麦哲伦地区(MR-slope)的斜坡。有瓣类等足类动物和其他无脊椎动物之间的新联系被记录下来。
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引用次数: 0
Summer circulation and water masses transport in Bransfield Strait, Antarctica: An evaluation of their response to combined effects of Southern Annular Mode and El Niño–Southern Oscillation 南极布兰斯菲尔德海峡夏季环流和水团输送:对南环模和El Niño-Southern振荡联合效应的响应评价
IF 2.3 3区 地球科学 Q2 OCEANOGRAPHY Pub Date : 2025-08-01 Epub Date: 2025-05-10 DOI: 10.1016/j.dsr.2025.104516
Brendon Yuri Damini , André L. Brum , Rob A. Hall , Tiago S. Dotto , José Luiz L. Azevedo , Karen J. Heywood , Mauricio M. Mata , Carlos A.E. Garcia , Rodrigo Kerr
Bransfield Strait, situated in the northern Antarctic Peninsula, is a critical area for studying the impacts of climate change. This complexity arises from the convergence of distinct water masses: Transitional Zonal Water with Weddell influence (TWW), and Transitional Zonal Water with Bellingshausen influence (TBW). This study aims to give a long–term description of Bransfield Strait circulation during austral summers through high-quality hydrographic data from 2003 to 2019, altimetry data and the global eddy–resolving ocean reanalysis product GLORYS12v1. Findings reveal a cyclonic ocean circulation pattern within Bransfield Strait, characterized by the northeastward Bransfield Current along the South Shetland Islands and extending to Elephant Island, and the southwestward Antarctic Coastal Current entering near 62.40°S and 55.00°W. GLORYS12v1 and altimetry datasets revealed that: part of the Bransfield Current leaves the eastern basin between King George and Clarence Islands and recirculation around the South Shetland Islands, and provides the first robust estimate over an extended period that TBW is transported between King George and Elephant Islands and feeds Bransfield Current. Our results highlight links between the strength of TBW transport and variability in climate modes, quantifying their magnitude and variability due to wind forcing modulation by combined effects of Southern Annular Mode and El Niño–Southern Oscillation indices (jointly called the SEI index). For instance, time-averaged years of SEI negative conditions reveal 0.10 Sv of TBW entering the Bransfield Strait between King George and Elephant Islands. On the other hand, under SEI positive conditions, the TBW transport increases to 0.31 Sv. These observed changes are crucial for advancing our understanding of regional circulation patterns and their underlying mechanisms, as they directly influence the physical and biogeochemical properties of the region.
布兰斯菲尔德海峡位于南极半岛北部,是研究气候变化影响的关键区域。这种复杂性源于不同水团的汇合:威德尔影响的过渡带水(TWW)和别令斯豪森影响的过渡带水(TBW)。本研究旨在通过2003 - 2019年高质量水文资料、高度计资料和全球涡旋解析海洋再分析产品GLORYS12v1,对布兰斯菲尔德海峡夏季环流进行长期描述。结果表明,布兰斯菲尔德海峡内的海洋环流为气旋型,其特征是布兰斯菲尔德洋流沿南设得兰群岛向东北方向延伸至大象岛,西南方向的南极海岸洋流进入62.40°S和55.00°W附近。gloys12v1和高测数据集显示:部分布兰斯菲尔德流离开乔治国王岛和克拉伦斯群岛之间的东部盆地,并在南设得兰群岛周围再循环,并提供了第一个可靠的估计,在很长一段时间内,TBW在乔治国王岛和象岛之间运输并供给布兰斯菲尔德流。我们的研究结果强调了TBW传输强度与气候模式变率之间的联系,量化了它们的强度和变率,这是由南环模和El Niño-Southern振荡指数(统称为SEI指数)的联合效应引起的风强迫调制。例如,SEI负条件的时间平均年显示,进入乔治国王岛和象岛之间的布兰斯菲尔德海峡的TBW为0.10 Sv。另一方面,在SEI正条件下,TBW输运增加到0.31 Sv。这些观测到的变化对于提高我们对区域环流模式及其潜在机制的理解至关重要,因为它们直接影响该区域的物理和生物地球化学特性。
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引用次数: 0
Diversity and distribution of Tanaidacea (Crustacea: Peracarida) in the abyssal polymetallic nodule fields of the eastern Clarion-Clipperton Fracture Zone 克拉里昂-克利珀顿断裂带东部深海多金属结核区tanaidaceae(甲壳类:Peracarida)的多样性和分布
IF 2.3 3区 地球科学 Q2 OCEANOGRAPHY Pub Date : 2025-08-01 Epub Date: 2025-05-16 DOI: 10.1016/j.dsr.2025.104521
Chee Kong Chim , Koh Siang Tan
Tanaidaceans comprise a significant macrofaunal component of the abyssal plains in the Clarion-Clipperton Fracture Zone (CCFZ), Pacific Ocean. A large amount of tanaid material were examined from the eastern end of CCFZ, specifically the OMS (Singapore) and UK-I (United Kingdom) exploration areas and one of the nearest Area of Particular Environmental Interest APEI-6. Some 1800 individuals were collected from 89 stations at 4016–4336 m depth primarily using the box corer, epibenthic sled and multiple corer during three research cruises conducted between 2013 and 2020. Based on morphological characters, a total of 98 species and morphospecies belonging to 12 families were identified from these specimens, of which 85 % are undescribed. Only seven of the 35 described tanaid species previously recorded from CCFZ were rediscovered in this study. The OMS and UK-I areas recorded 85 and 71 species, respectively, and these high species richness as compared to values reported in other exploration areas could be due to greater sampling effort. Despite the close geographical proximity of OMS and UK-I, only 59 % of recorded species were common between the areas. Differences were observed in tanaid density, species richness and species composition between the northern and southern stations in the combined areas of OMS and UK-I. Interestingly, the relatively distant APEI-6 recorded 11 species, all of which were also present in OMS and UK-I. This study did not detect any relationship between tanaid community measures and abiotic factors. Another important outcome of this study is that the addition of the 250 μm mesh to the usual 300 μm mesh increased the total number of individuals retained on the sieves by 25–32 %, but not the total number of species. Even though the 0–2 cm sediment layer contained 1.4–3.0 times and 2.1–8.3 times more individuals than the 2–5 cm and 5–10 layers, respectively, no species was found exclusively at the top layer.
在太平洋Clarion-Clipperton断裂带(CCFZ)的深海平原中,塔尼纲动物是一个重要的大型动物组成部分。从CCFZ的东端,特别是OMS(新加坡)和UK-I(英国)勘探区以及最近的一个特别环境利益区域(api -6),检查了大量的稀土材料。2013年至2020年进行的3次研究巡航中,主要使用箱盖、底栖雪橇和多重覆盖,在4016-4336 m深度的89个站点采集了约1800只个体。根据形态特征鉴定,共鉴定出12科98种和形态种,其中85%未描述。在CCFZ已有记录的35种tanaid中,只有7种在本研究中被重新发现。OMS和UK-I地区分别记录了85种和71种,与其他勘探地区报告的物种丰富度相比,这些高物种丰富度可能是由于更多的采样努力。尽管OMS和UK-I的地理位置接近,但只有59%的记录物种在这两个地区之间是共同的。在OMS和UK-I合并区域,南北站点在物种密度、物种丰富度和物种组成上存在差异。有趣的是,相对较远的api -6记录了11种,这些物种都存在于OMS和UK-I中。本研究未发现援助社区措施与非生物因素有任何关系。本研究的另一个重要结果是,在通常的300 μm网目的基础上增加250 μm网目,保留在筛子上的个体总数增加了25 - 32%,但物种总数没有增加。0 ~ 2 cm沉积物层的个体数量是2 ~ 5 cm沉积物层的1.4 ~ 3.0倍,是5 ~ 10 cm沉积物层的2.1 ~ 8.3倍。
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引用次数: 0
Mapping suitable thermal migration corridors for western Alaska chum salmon in the North Pacific 在北太平洋为阿拉斯加西部鲑鱼绘制合适的热迁移通道
IF 2.3 3区 地球科学 Q2 OCEANOGRAPHY Pub Date : 2025-08-01 Epub Date: 2025-05-20 DOI: 10.1016/j.dsr.2025.104531
Emily Lemagie , Ed Farley , Joseph A. Langan , Phyllis J. Stabeno
It is evident that warming North Pacific Ocean (NPO) temperatures are impacting salmon fitness and survival. Record-low western Alaska chum salmon run sizes were recorded in the Yukon River during 2020 and 2021. Based on recent analyses of Pacific salmon species-specific ocean temperature preferences, chum salmon have the widest thermal preference range; we focus on chum because they may have the greatest resilience to temperature variability and if their range is impacted, it is likely other species will respond to observed warming as well. Thermal suitability was mapped along the seasonal migration based on swimming rates to examine potential interannual range or distribution shifts. Two individual-based models of salmon migration driven by surface temperatures and geostrophic currents were run to test the impact of ocean physics on migration and distribution. We found that in the last decade ocean temperatures have similar magnitude and variability as projected through 2050. Since around 2013, the high suitability migration corridor has shifted northwards into the Bering Sea, but the seasonal migration may not be driven primarily by temperature or ocean currents. Warmer ocean temperatures, marine heatwaves, and loss of seasonal sea ice are likely to have the greatest impacts on western Alaska chum salmon where thermal suitability is lowest–in the Bering Sea in winter, and in the eastern Gulf of Alaska in summer. The impacts at the margins of their habitat range may lead to poor condition, a northward domain shift, and more fish entering the Arctic Ocean.
很明显,变暖的北太平洋(NPO)温度正在影响鲑鱼的健康和生存。育空河在2020年和2021年记录了阿拉斯加西部鲑鱼洄游规模的最低记录。根据最近对太平洋鲑鱼物种特有的海洋温度偏好的分析,鲑鱼具有最广泛的温度偏好范围;我们之所以关注熟鸟,是因为它们可能对温度变化有最大的适应能力,如果它们的活动范围受到影响,其他物种很可能也会对观测到的变暖做出反应。根据游泳率绘制了季节性迁徙的热适宜性图,以检查潜在的年际范围或分布变化。为了测试海洋物理对鲑鱼迁移和分布的影响,研究人员建立了两个基于个体的模型,分别由地表温度和地转流驱动。我们发现,在过去十年中,海洋温度与预计到2050年的幅度和可变性相似。自2013年左右以来,高适宜性迁徙走廊向北转移到白令海,但季节性迁徙可能主要不是由温度或洋流驱动的。海洋温度升高、海洋热浪和季节性海冰的减少可能会对阿拉斯加西部的鲑鱼产生最大的影响,因为那里的热适应性最低——冬季在白令海,夏季在阿拉斯加湾东部。对其栖息地范围边缘的影响可能导致环境恶化,向北转移,以及更多的鱼类进入北冰洋。
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引用次数: 0
Pathways and impacts of ENSO-induced oceanic variability in the southern Indian Ocean investigated with high-resolution model simulations 利用高分辨率模式模拟研究了enso引起的南印度洋海洋变率的途径和影响
IF 2.3 3区 地球科学 Q2 OCEANOGRAPHY Pub Date : 2025-08-01 Epub Date: 2025-05-21 DOI: 10.1016/j.dsr.2025.104532
Yanan Zhu , Yuanlong Li , Yilong Lyu , Fan Wang
Pacific Ocean water masses can reach the Atlantic through the Indonesian Throughflow (ITF) and Agulhas Current (AC) leakage, constituting an essential route of the global ocean conveyor belt. However, whether the oceanic variability induced by El Niño-Southern Oscillation (ENSO) can efficiently penetrate through this route remains largely uncertain. In this study, we utilize experiments of a high-resolution (0.1° in horizontal resolution) ocean model to revisit pathways of Pacific-origin oceanic signals and their impacts on the Southern Indian Ocean (SIO) circulation. The experiments are performed for the 2014–2022 period to cover the 2015–2016 super El Niño and the 2020–2022 consecutive La Niña. Our results reveal a main pathway of Pacific-origin baroclinic Rossby waves stretching from the Maritime Continent to Madagascar, with ENSO signatures weakening rapidly as proceeding westward. The Pacific-origin oceanic signals explain ∼95 % of the strength variability in the ITF outflow at 116°E, ∼66 % of that in the South Equatorial Current (SEC) and ∼17 % of that in the Northeast Madagascar Current (NEMC) during 2014–2022. Through this “oceanic channel” mechanism, the 2015–2016 El Niño led to a strengthened NEMC in 2016 and a weakened Southeast Madagascar Current (SEMC) in 2017. By contrast, this oceanic channel effect is generally negligible for the AC system which is dominated by ocean internal variability. These results constrain the extent of ENSO's modulation effect on the SIO circulation and imply that effective ocean-channel communication between the Pacific and the Atlantic has to occur on decadal or longer timescales.
太平洋水团可以通过印尼通流(ITF)和阿古拉斯流(AC)泄漏到达大西洋,构成了全球海洋传送带的重要路线。然而,El Niño-Southern涛动(ENSO)引起的海洋变率是否能有效穿透这条路径,在很大程度上仍不确定。在这项研究中,我们利用高分辨率(水平分辨率0.1°)海洋模式的实验,重新审视了太平洋源海洋信号的路径及其对南印度洋环流的影响。实验时间为2014-2022年,覆盖2015-2016年超级厄尔Niño和2020-2022年连续厄尔Niña。我们的研究结果揭示了太平洋斜压罗斯比波从海洋大陆延伸到马达加斯加的主要路径,ENSO信号在向西移动时迅速减弱。2014-2022年期间,来自太平洋的海洋信号解释了116°E的ITF外流强度变化的~ 95%,南赤道流(SEC)的~ 66%和东北马达加斯加流(NEMC)的~ 17%。通过这种“海洋通道”机制,2015-2016年厄尔尼诺Niño导致2016年东北太平洋环流增强,2017年马达加斯加东南海流减弱。相比之下,对于以海洋内部变率为主的交流系统,这种海洋通道效应通常可以忽略不计。这些结果限制了ENSO对SIO环流调制作用的程度,并暗示太平洋和大西洋之间有效的海洋通道通信必须在十年或更长时间尺度上发生。
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引用次数: 0
Lanternfish (Myctophidae) distribution and diversity patterns in the Southwestern Atlantic Ocean 西南大西洋灯笼鱼的分布与多样性格局
IF 2.3 3区 地球科学 Q2 OCEANOGRAPHY Pub Date : 2025-08-01 Epub Date: 2025-05-13 DOI: 10.1016/j.dsr.2025.104518
Victoria Rodríguez Zanchin , Brenda Temperoni , Eduardo M. Acha , Claudio C. Buratti , Daniela Alemany
Lanternfishes (family Myctophidae) are among the most diverse and abundant fishes that inhabit the world's oceans. They constitute a major part of the biomass in oceanic areas, and they play an important role in life-sustaining processes of marine ecosystems, including carbon cycling. However, in the Southwestern Atlantic Ocean (SWAO), many ecological aspects of the lanternfishes remain understudied. The aim of this study was to investigate the distribution, diversity, assemblage structure and relative abundance of lanternfishes in relation to oceanographic features, between 34° S and 55° S, from the Argentine continental shelf up to 43° W. A database of 2186 fishing trawls conducted during 26 research cruises from 1978 to 2023 was analyzed. Thirty-four lanternfish species were identified, only found in 244 trawls, mostly distributed from the 100 m isobath towards the oceanic domain. This study revealed clear differences in species richness and abundance of lanternfishes between the different areas of the SWAO: 1 or 2 species were found at the shelf break, where high abundances were recorded, while at the northernmost oceanic realm, species richness was higher but with low abundance records. Three main assemblages were defined based on myctophid species composition, whose structure and distribution were strongly influenced by the properties of water masses and the averaged position of the oceanic fronts.
灯笼鱼(灯笼鱼科)是世界海洋中种类最多、数量最多的鱼类之一。它们是海洋地区生物量的重要组成部分,在包括碳循环在内的海洋生态系统生命维持过程中发挥着重要作用。然而,在西南大西洋(SWAO),灯笼鱼的许多生态方面仍未得到充分研究。本研究的目的是调查阿根廷大陆架至43°w, 34°S至55°S之间灯笼鱼的分布、多样性、组合结构和相对丰度与海洋特征的关系。研究人员分析了1978年至2023年26次研究巡航期间进行的2186条拖网捕鱼数据库。共鉴定出34种灯笼鱼,仅在244条拖网中发现,主要分布在100米等深线向海洋区域。结果表明,不同区域间灯笼鱼的物种丰富度和丰度存在明显差异:陆架断裂带有1 ~ 2种,丰度较高,而最北端海域丰富度较高,但丰度较低。根据菌种组成划分出3个主要的菌群,其结构和分布受水体性质和洋锋平均位置的强烈影响。
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引用次数: 0
The roles of benthic diversity and environmental factors in nutrient and macrofaunal dynamics within the oxygen minimum zone of the British Columbia continental slope 不列颠哥伦比亚省陆坡最低氧带底栖生物多样性和环境因子在营养和大型动物动态中的作用
IF 2.3 3区 地球科学 Q2 OCEANOGRAPHY Pub Date : 2025-08-01 Epub Date: 2025-05-22 DOI: 10.1016/j.dsr.2025.104530
Alessia C. Ciraolo , Paul V.R. Snelgrove , Marta M. Cecchetto , Andrew K. Sweetman
Global warming has expanded oxygen minimum zones (OMZs), or oceanic “dead zones”. Despite their ecological significance, the diversity, and functional roles of benthic organisms in nutrient cycling and carbon (C) uptake in OMZ remain understudied. In this study, we focused on the Northeast Pacific continental slope OMZ (600–1200 m depth) off Vancouver Island, Canada, along an oxygen and depth transect (∼77, 40, and 10 μmol ‧ l−1 at 200-, 475-, 850-m depth, respectively). Using a multicorer we collected sediment cores and performed shipboard incubations to examine organic matter remineralization and nutrient flux rates. In parallel, we performed pulse-chase tracer incubations with isotopically labeled algae (Phaeodactylum sp.) at the 475- and 850-m sites, to assess macrofaunal C uptake and benthic nutrient flux responses to fresh phytodetritus. Our results revealed no clear influence of decreasing oxygen on macrofaunal abundances, nutrient regeneration, or on the role of infauna in organic matter remineralization. Nontheless, organic matter quantity and quality strongly influenced macrofaunal community structure. Despite differences in community composition among sites, we also observed no clear relationship between macrofaunal community composition and nutrient fluxes, with phytoplankton-based food as a key food source for oxygen-deficient-adapted infauna. The highest C uptake rate and highest net nutrient influxes at the 475 m site contrasted lower rates at 850 m site, where only one flabelligerid and one cirratulid polychaete species ingested the organic matter, followed by amphipods, cumaceans, unidentified crustaceans, and bivalves, all primarily in the upper 2 cm of sediment. Our findings highlight the complex interplay of oxygen, depth, and organic matter, suggesting that organic matter quality and quantity may obscure oxygen effects on benthic biodiversity and ecological processes.
全球变暖扩大了氧气最小带(OMZs),即海洋“死亡区”。尽管底栖生物具有重要的生态意义,但其多样性及其在OMZ养分循环和碳(C)吸收中的功能作用仍未得到充分研究。在这项研究中,我们重点研究了加拿大温哥华岛附近东北太平洋大陆坡OMZ (600-1200 m深度),沿着氧气和深度样带(分别在200-,475-,850-m深度为~ 77,40和10 μmol·l−1)。我们使用多层覆盖物收集沉积物岩心,并在船上进行孵育,以检查有机物再矿化和营养通量率。与此同时,我们在475米和850米的地点用同位素标记的藻类(Phaeodactylum sp.)进行了脉冲追踪示踪培养,以评估大型动物对C的吸收和底栖生物对新鲜植物碎屑的营养通量的反应。我们的研究结果显示,氧气减少对大型动物丰度、养分再生或动物在有机物再矿化中的作用没有明显的影响。然而,有机质的数量和质量对大型动物群落结构有强烈的影响。尽管不同地点的群落组成存在差异,但我们也观察到大型动物群落组成与营养通量之间没有明确的关系,以浮游植物为基础的食物是缺氧适应动物的主要食物来源。475 m位置的碳吸收率和净营养物流通量最高,而850 m位置的吸收率较低,只有一种软肋类和一种环状多毛类摄入有机物,其次是片脚类、cumac纲、未识别的甲壳类和双壳类,所有这些都主要在沉积物的上部2 cm。我们的研究结果强调了氧气、深度和有机质之间复杂的相互作用,表明有机质的质量和数量可能掩盖了氧气对底栖生物多样性和生态过程的影响。
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引用次数: 0
Pressurised aquaria for the study of deep-water corals 研究深水珊瑚的加压水缸
IF 2.3 3区 地球科学 Q2 OCEANOGRAPHY Pub Date : 2025-08-01 Epub Date: 2025-05-15 DOI: 10.1016/j.dsr.2025.104520
B. Shillito , L. Amand , M. Zbinden , D. Barthelemy , J. Tourolle , L. Menot
A set of four identical pressurised mesocosms is presented, aiming at long-term incubations of deep-water corals, as deep as 3000 m. Care was also taken to enable practical boarding of these instruments on oceanographic ships. Four-month incubations of two scleractinian species (D. pertusum and M. oculata) originating from 800 m depth were achieved at the laboratory (including 3 months at 8 MPa pressure). Two of the aquaria were also operated during a 2-week cruise in the Bay of Biscay, focusing on the same species. Specific requirements for long-term studies are exposed and discussed, emphasizing resistance to corrosion and the possibility to feed fauna without decompression. The first-time long-term incubation of deep-water corals at in situ pressure opens perspectives for future studies, including investigations on deeper corals not yet accessible to laboratory experiments. The use of pressurised mesocosms may be of particular importance, considering the predicted consequences of ocean warming and acidification on the bathymetric distribution of reef-forming deep-water scleractinians.
提出了一套四个相同的加压中生态系统,旨在深水珊瑚的长期孵化,深达3000米。还注意使这些仪器能够实际登上海洋研究船上。在实验室对来自800 m深度的两种硬核菌(D. pertusum和m . oculata)进行了4个月的孵化(包括在8 MPa压力下的3个月)。其中两个水族馆也在比斯开湾进行了为期两周的巡航,重点关注同一物种。对长期研究的具体要求进行了暴露和讨论,强调耐腐蚀和不减压喂养动物群的可能性。首次在原位压力下对深水珊瑚进行长期孵化,为未来的研究开辟了前景,包括对尚未进行实验室实验的更深珊瑚的调查。考虑到海洋变暖和酸化对造礁深水硬壳生物的水深分布的预测后果,使用加压中生态系统可能特别重要。
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引用次数: 0
Corrigendum to “Pteropod assemblages in the oceanic waters of the southern Gulf of Mexico (June 2015)” [Deep-Sea Res. Part I 216 (2025) 1–17 104431] “墨西哥湾南部海域的翼足类动物群落(2015年6月)”的勘误表[Deep-Sea Res. Part I 216 (2025) 1-17 104431]
IF 2.3 3区 地球科学 Q2 OCEANOGRAPHY Pub Date : 2025-07-01 Epub Date: 2025-05-13 DOI: 10.1016/j.dsr.2025.104504
H.S. López-Arellanes , J.A. Cruz-Barraza , E.D. Ruvalcaba-Aroche , C.A. Silva-Segundo
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引用次数: 0
The hanging gardens of Blanes Canyon, Northwestern Mediterranean Sea 地中海西北部布内斯峡谷的空中花园
IF 2.3 3区 地球科学 Q2 OCEANOGRAPHY Pub Date : 2025-07-01 Epub Date: 2025-05-08 DOI: 10.1016/j.dsr.2025.104514
Meri Bilan , Jordi Grinyó , Cecilia Cabrera , Andrea Gori , Andreu Santín , Veerle A.I. Huvenne , Marie-Claire Fabri , Marta Arjona-Camas , Sarah Paradis , Claudio Lo Iacono , Stefano Ambroso , Ruth Durán , Stefano Piraino , Sergio Rossi , Pere Puig
Submarine canyons are ubiquitous geomorphic features found intercepting the continental margins. As such, they provide environmental conditions suitable for many suspension feeding organisms, as they settle on steep rocky canyon walls, whilst taking advantage of increased currents that bring suspended organic matter and food. Additionally, demersal fishing grounds can be found surrounding submarine canyons where it can negatively affect species inhabiting these environments, including vulnerable ecosystems such as cold-water corals (CWCs). In order to understand the impacts of demersal fisheries in CWC communities, we first need to understand their distribution, species composition and vulnerability. Blanes Canyon is an example of a submarine canyon surrounded by demersal fishing grounds, where baseline knowledge on CWCs currently lacks. This study contributes to filling these knowledge gaps by using a dense grid of ROV transects along the canyon, high resolution bathymetry data and CTD surveys, which altogether provide a quantitative description of megabenthic assemblages. Blanes Canyon hosts at least 12 CWC species within 450–1300 m depth range, mainly inhabiting the steep canyon walls. Different assemblages of CWC species were found. Desmophyllum dianthus was the most abundant species, found throughout the entire canyon. Colonial scleractinian species (Desmophyllum pertusum and Madrepora oculata) were found in the canyon head but were lacking in the eastern canyon branch, where octocorals (Muriceides lepida) and black corals (Leiopathes glaberrima) were prevailing. Detailed CTD survey indicated that nepheloid layers (bottom and intermediate) were found at the same depth range as the megabenthic communities, since they provide suspension feeders with particulate organic matter (POM). Overall, this study confirms Blanes Canyon as a CWC habitat, providing densities and spatial distribution of different megabenthic species, along with information of their environmental niches.
海底峡谷是普遍存在于大陆边缘的地貌特征。因此,它们为许多悬浮食性生物提供了适合的环境条件,因为它们在陡峭的岩石峡谷壁上定居,同时利用增加的水流带来悬浮有机物和食物。此外,海底峡谷周围的海底渔场可能会对生活在这些环境中的物种产生负面影响,包括脆弱的生态系统,如冷水珊瑚(cwc)。为了了解底栖渔业对CWC群落的影响,我们首先需要了解它们的分布、物种组成和脆弱性。Blanes峡谷是海底峡谷的一个例子,周围是海底渔场,目前缺乏对化学化学武器的基本了解。该研究通过使用沿着峡谷的ROV样带的密集网格、高分辨率测深数据和CTD测量来填补这些知识空白,这些数据共同提供了对巨型生物组合的定量描述。在450-1300米的深度范围内,Blanes峡谷至少有12种CWC,主要栖息在陡峭的峡谷壁上。发现了不同种类CWC的组合。石竹是最丰富的物种,在整个峡谷中都有发现。在峡谷头部发现了硬珊瑚种群(Desmophyllum pertusum和Madrepora oculata),而在峡谷东部分支则缺乏,主要是八珊瑚(Muriceides lepida)和黑珊瑚(Leiopathes glaberrima)。详细的CTD调查表明,在与巨石群落相同的深度范围内发现了nepheloid层(底部和中间),因为它们为悬浮饵料提供了颗粒有机质(POM)。总体而言,本研究证实了Blanes峡谷是CWC的栖息地,提供了不同巨型物种的密度和空间分布,以及它们的环境生态位信息。
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Deep-Sea Research Part I-Oceanographic Research Papers
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