Article
Geography, Physical
Taylor D. Sullivan, Andrew D. Parsekian, Janelle Sharp, Philip J. Hanke, Frederic Thalasso, Mark Shapley, Melanie Engram, Katey Walter Anthony
Summary: The occurrence and magnitude of natural fossil methane emissions in the Arctic are poorly known, with particular interest in geologic CH4 emissions due to the potential for positive feedback to climate warming. In Esieh Lake, geologic CH4 is being vented through pockmarks on the lake bottom, making it one of the highest flux geologic CH4 seep fields known on land. The poleward retreat of continuous permafrost may lead to more subcap methane release with increased permafrost thaw.
PERMAFROST AND PERIGLACIAL PROCESSES
(2021)
Article
Environmental Sciences
Wenjing Li, Huai Cheng, Xiaoming Miao, Tingting Wu, Zhiyuan Xie, Gang Wu, Jiangong We
Summary: In this study, the analysis of a clam shell collected from the Haima cold seep in the South China Sea revealed that the irregular cold seep activity caused changes in temperature, redox state, and pH in the cold seep ecosystem. These findings highlight the vital influences of cold seep activities on the biogeochemistry of the ecosystem.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Engineering, Marine
Gongzheng Ma, Linsen Zhan, Hailong Lu, Guiting Hou
Summary: This review classifies and discusses the formation mechanisms and relationships of geological structures in shallow marine sediments, including overpressure-associated structures, diapir structures and sediment ruptures.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Ellen Lalk, Thomas Pape, Danielle S. Gruen, Norbert Kaul, Jennifer S. Karolewski, Gerhard Bohrmann, Shuhei Ono
Summary: This study investigates submarine gas hydrate deposits from different regions of the world's oceans using isotope analysis, providing insights into the source and generation depth of methane. The findings suggest that the isotopic composition of methane can provide information about microbial and thermogenic sources, and the apparent temperature can be used to infer the depth of methane generation.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Plant Sciences
Enjing Jin, Huayue Li, Zengzhi Liu, Fei Xiao, Wenli Li
Summary: Two new and six known dixiamycins were isolated from the culture broth of a cold-seep-derived actinomycete Streptomyces olivaceus OUCLQ19-3. The compounds showed notable growth inhibitions against multi-drug-resistant strains, with some being more potent than the positive control tetracycline. Extensive spectroscopic analyses were used to elucidate the structures of the compounds.
JOURNAL OF NATURAL PRODUCTS
(2021)
Article
Engineering, Electrical & Electronic
Lin Guo, Octavian Postolache, Lin Ma, Yang Shi
Summary: This article introduces a ship-borne cold seep sonar system that detects the existence of submarine cold seep by measuring scattering intensity and displays it through an intuitive acoustic image. Through investigation and measurement in the South China Sea, it is proven that the system can effectively identify submarine cold seep.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Multidisciplinary Sciences
Lucia Villar-Munoz, Masataka Kinoshita, Joaquim P. Bento, Ivan Vargas-Cordero, Eduardo Contreras-Reyes, Umberta Tinivella, Michela Giustiniani, Natsue Abe, Ryo Anma, Yuji Orihashi, Hikaru Iwamori, Tomoaki Nishikawa, Eugenio Andres Veloso, Satoru Haraguchi
Summary: Integrated analysis of geophysical and geological datasets in the Chile Triple Junction has improved understanding of the hydrogeological system. Anomalous high heat flow values and fluid advection are influenced by geological structures, pressure-driven discharge, and ridge subduction, providing valuable insights for studies related to hydrothermal circulation, seismicity, volcanism, and gas hydrate stability.
SCIENTIFIC REPORTS
(2021)
Article
Ecology
Zhimeng Xu, Jiawei Chen, Yingdong Li, Erfan Shekarriz, Wenxue Wu, Bingzhang Chen, Hongbin Liu
Summary: Using high-throughput sequencing data, this study reveals that cold-seep sediment harbors a higher abundance and diversity of parasitic microeukaryotes compared to non-seep regions. The study also shows that microeukaryotic community heterogeneity is larger between habitats than within habitat, highlighting the importance of cold-seep sediment as a hotspot for microeukaryotic diversity.
Article
Microbiology
Chenchen Guo, Rikuan Zheng, Ruining Cai, Chaomin Sun, Shimei Wu
Summary: The study identified a novel bacterial strain, Pseudomonas marinensis gcc21, isolated from deep-sea cold seep sediment, which exhibited high catalytic activity of cold-active lipases at 4 degrees C. The strain's genome contained two novel encoding genes for cold-active lipases, Lipase 1 and Lipase 2.
Article
Microbiology
Danrui Wang, Jiangtao Li, Lei Su, Wenli Shen, Kai Feng, Xi Peng, Zhujun Wang, Bo Zhao, Zheng Zhang, Zhaojing Zhang, Etienne Yergeau, Ye Deng
Summary: REMIRGE program was developed to retrieve full-length functional genes from shotgun metagenomic reads and explore phylogenetic diversity in cold seep sediments. The study revealed divergent phylogenetic diversity of functional groups and functional pathway preferences in deep-sea cold seeps, highlighting the potential of phylogenetic information for comprehensive functional profiles and uncovering new insights from shotgun metagenomic data.
Article
Microbiology
Zheng Xu, Minxiao Wang, Huan Zhang, Wanying He, Lei Cao, Chao Lian, Zhaoshan Zhong, Hao Wang, Lulu Fu, Xin Zhang, Chaolun Li
Summary: This study investigated the taxonomic composition, functions, and potential interactions of symbionts in deep-sea invertebrates. The results revealed metabolic interactions among different symbionts, which contribute to the overall adaptability of the community. Additionally, elemental sulfur was found to enhance sulfur utilization in the community. These findings highlight the importance of microbe-microbe interactions in symbiosis and deep-sea adaptation.
Article
Geosciences, Multidisciplinary
Krzysztof Hryniewicz, Yusuke Miyajima, Kazutaka Amano, Magdalena N. Georgieva, Michal Jakubowicz, Robert G. Jenkins, Andrzej Kaim
Summary: The studied seep carbonates from Tsushima, Japan, represent the earliest evidence of hydrocarbon seepage in the Sea of Japan, forming within a pull-apart basin before major anticlines had formed. The carbonates are primarily composed of calcite, with significant admixture of ankerite at Kanoura, and isotopic analysis indicates methanogenic origin.
GEOLOGICAL MAGAZINE
(2021)
Article
Chemistry, Medicinal
Ya-Ping Liu, Sheng-Tao Fang, Zhen-Zhen Shi, Bin-Gui Wang, Xiao-Nian Li, Nai-Yun Ji
Summary: Five new compounds, including a natural phenylhydrazone-bearing steroid, were isolated from the fungus Penicillium oxalicum obtained from the deep sea cold seep, showing unique structures and inhibition properties against marine phytoplankton species and marine-derived bacteria.
Article
Microbiology
Yongxin Lv, Shanshan Yang, Xiang Xiao, Yu Zhang
Summary: In the ocean, understanding the methane cycling in cold seeps is crucial to estimating the oceanic methane budget. Cold-seep eruptions can lead to the destruction of microbial ecosystems that drive methane cycling. This study simulated cold-seep eruptions and used genome-resolved metagenomics to analyze the dynamic changes in the microbial community during these events.
Article
Microbiology
Ye Chen, Cuiling Xu, Nengyou Wu, Zhilei Sun, Changling Liu, Yu Zhen, Youzhi Xin, Xilin Zhang, Wei Geng, Hong Cao, Bin Zhai, Jing Li, Shuangshuang Qin, Yucheng Zhou
Summary: The microbial communities associated with active cold seeps in the Okinawa Trough were investigated, particularly those involved in the anaerobic oxidation of methane (AOM). Methane-oxidizing archaea and their associations with other microorganisms were identified, indicating their potential role in iron reduction coupled to methane oxidation (Fe-AOM). ANME-1a was found to be a key player in Fe-AOM in the sediments of the Okinawa Trough cold seep.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Miriam Roemer, Heiko Sahling, Christian dos Santos Ferreira, Gerhard Bohrmann
GEO-MARINE LETTERS
(2020)
Article
Oceanography
Ondreas Helene, Olu Karine, Dupre Stephanie, Scalabrin Carla, Alix Anne-Sophie, Garrocq Clement, Ruffine Livio
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2020)
Article
Geosciences, Multidisciplinary
M. Riedel, T. Freudenthal, M. Bergenthal, M. Haeckel, K. Wallmann, E. Spangenberg, J. Bialas, G. Bohrmann
MARINE AND PETROLEUM GEOLOGY
(2020)
Article
Environmental Sciences
Fanny Girard, Jozee Sarrazin, Karine Olu
FRONTIERS IN MARINE SCIENCE
(2020)
Article
Oceanography
Nuria Sanchez, Daniela Zeppilli, Elisa Baldrighi, Ann Vanreusel, Max Gasimandova Lahitsiresy, Christophe Brandily, Lucie Pastor, Lara Macheriotou, Guillermo Garcia-Gomez, St ephanie Dupre, Karine Olu
Summary: The study found that in active pockmarks, there is a higher density of meiofauna, but lower density of macrofauna. In the top oxygenated layers of sediment, there is higher richness and abundance of macroand meiofauna. Some taxa appear to be more tolerant to extreme conditions and may serve as potential bioindicators of pockmark activity in the area.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2021)
Article
Geosciences, Multidisciplinary
Thomas Pape, Martin Blumenberg, Anja Reitz, Georg Scheeder, Mark Schmidt, Matthias Haeckel, Valentina N. Blinova, Michael K. Ivanov, Heiko Sahling, Klaus Wallmann, Gerhard Bohrmann
Summary: This study identified the likely sources of gas and oil emitted at various seep sites on the continental slope off Georgia in the Eastern Black Sea. The hydrocarbons ascending at these sites are determined to originate from the Eocene Kuma Formation and/or the Oligocene-Lower Miocene Maikop Group, which are considered to be the principal hydrocarbon sources in the region.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Environmental Sciences
Lara Macheriotou, Annelien Rigaux, Karine Olu, Daniela Zeppilli, Sofie Derycke, Ann Vanreusel
Summary: The study revealed differences in nematode diversity and co-occurrence patterns between a low-activity pockmark in the Mozambique Channel at 789m and nearby reference areas, as well as abyssal sediments. The findings suggest an influence of neutral dynamics at this locality resulting from the stochastic sampling of early colonizing taxa.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Geochemistry & Geophysics
Yann Marcon, Deborah Kelley, Blair Thornton, Dana Manalang, Gerhard Bohrmann
Summary: Current estimations of seabed methane release do not account for the temporal variability and local tide influences on gas emission intensity, highlighting the need for systematic monitoring. Our study reveals a dynamic seep environment with fluctuating bubble plumes and shifting outlet locations, indicating the complexity of methane flux estimations and the importance of considering tidal cycles in gas flux calculations.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Biodiversity Conservation
Lilian Boehringer, Sofia P. Ramalho, Yann Marcon, Antje Boetius, Daphne Cuvelier, Autun Purser
Summary: This study examined experiments conducted in the Peru Basin and Clarion-Clipperton Fracture Zone to assess the potential environmental impacts of future mining, with a focus on the image data of Paleodictyon traces. The findings suggest that the density of these patterns on disturbed substrates was lower than on undisturbed substrates, indicating that physical seafloor disturbance continues to impact these structures and forming organisms even 26 years later.
MARINE BIODIVERSITY
(2021)
Article
Environmental Sciences
Melissa Hanafi-Portier, Sarah Samadi, Laure Corbari, Tin-Yam Chan, Wei-Jen Chen, Jhen-Nien Chen, Mao-Ying Lee, Christopher Mah, Thomas Saucede, Catherine Borremans, Karine Olu
Summary: Imagery has become an important tool for assessing deep-sea biodiversity, providing quantitative and repeatable estimates. Taxon identification from images is challenging, especially in regions where faunal knowledge is limited. The efficiency of imagery and physical sampling may vary among different habitat types.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Oceanography
Katrin Linse, Miriam Roemer, Crispin T. S. Little, Yann Marcon, Gerhard Bohrmann
Summary: The Sandwich Plate is a highly active region in terms of tectonic activity in the Southern Ocean and Antarctica, with volcanic islands, submarine volcanic features, seismic activity, and hydrothermal vents. A recent investigation explored potential hydrothermally active sites in different depths, revealing thermal anomalies and chimney structures. However, the benthic habitats and communities of the Sandwich Plate are still poorly understood.
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
(2022)
Article
Geosciences, Multidisciplinary
Yann Marcon, Miriam Roemer, Martin Scherwath, Michael Riedel, Knut Ola Dolven, Martin Heesemann
Summary: This study found that seabed methane gas emissions are influenced by the diurnal and semi-diurnal tides, but tides alone are not enough to stop the emissions. The study also showed that the tides do not seem to modulate the vigor of active gas emissions.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Zoology
Diego Cepeda, Nuria Sanchez, Karine Olu, Daniela Zeppilli
Summary: A new species of rare genus Ryuguderes is described from the deep-sea muddy seafloor in the Mozambique Channel. The new species differs from its known congener in the arrangement of dorsal spines, ventral acicular spines, and female papillae. Despite the ecological peculiarities of its habitat, the new species was found outside active pockmark areas, suggesting a lack of adaptation to extreme environmental conditions associated with cold seeps.
ZOOLOGISCHER ANZEIGER
(2022)
Article
Oceanography
Mohamad Hassan, Sara Teixeira, Carole Decker, Sandra Fuchs, Olivier Mouchel, Karine Olu, Sophie Arnaud-Haond
Summary: Chemosynthetic ecosystems in the deep ocean have limited knowledge on connectivity and dispersal. This study focused on the genetic analysis of a deep-sea species, Christineconcha regab, and found genetic differentiation along depth gradients and regional scale gene flow.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2023)
Article
Geosciences, Multidisciplinary
Stephanie Dupre, Jean-Paul Foucher, Catherine Pierre, Carole Decker, Graham Westbrook, Stephan Ker, Karine Olu, Jean-Pierre Donval, Jean-Luc Charlou, Marie-Madeleine Blanc-Valleron, Herve Nouze
Summary: Fluid seepage within the Nyegga pockmark field off mid-Norway was investigated through ROV dives at the CNE sites. The seafloor morphology corresponds to pockmarks and adjacent ridges, and chimneys underlie these structures. Present-day methane-rich fluid seepage is indicated by chemosynthetic fauna, microbial mats, and bottom-water methane anomalies. The presence of authigenic carbonates and the ages of methane venting periods provide insights into past seepage. The seafloor morphology, seepage patterns, and pore-water chemistry profiles show heterogeneity.
FRONTIERS IN EARTH SCIENCE
(2023)