Results 41 to 50 of about 54,376 (146)

Hadal zones of the Northwest Pacific Ocean [PDF]

, 2021
Understanding the extent of the hadal ecosystem (habitats exceeding 6000 m water depth) is convoluted due to the complexity of seafloor geomorphology that accounts for 45% of the total ocean depth range.
Jamieson, Alan J., Stewart, Heather A.
core   +1 more source

Distribution and niche separation of planktonic microbial communities in the water columns from the surface to the hadal waters of the Japan Trench under the eutrophic ocean

Frontiers in Microbiology, 2016
The Japan Trench is located under the eutrophic Northwestern Pacific while the Mariana Trench that harbors the unique hadal planktonic biosphere is located under the oligotrophic Pacific. Water samples from the sea surface to just above the seafloor at a
Takuro Nunoura, Miho Hirai, Yukari Yoshida-Takashima, Manabu Nishizawa, Shinsuke Kawagucci, Taichi Yokokawa, Junichi Miyazaki, Osamu Koide, Hiroko Makita, Yoshihiro Takaki, Michinari SUNAMURA, Ken Takai   +11 more
doaj   +1 more source

Bulk and Active Sediment Prokaryotic Communities in the Mariana and Mussau Trenches

Frontiers in Microbiology, 2020
Surprisingly high rates of microbial respiration have recently been reported in hadal trench sediment, yet the potentially active microorganisms and specific microbe–microbe relationships in trench sediment are largely unknown.
Rulong Liu, Zixuan Wang, Li Wang, Zhenzhen Li, Jiasong Fang, Jiasong Fang, Jiasong Fang, Xing Wei, Wenxia Wei, Junwei Cao, Yuli Wei, Zhe Xie   +11 more
doaj   +1 more source

Depth shapes microbiome assembly and network stability in the Mariana Trench

Microbiology Spectrum
The Mariana Trench, a stable marine ecosystem minimally impacted by human activities, has the greatest vertical depth in the ocean. Depth gradients profoundly influence the physical, chemical, and biotic conditions in the deep oceans.
Yi Li, Jinjun Kan, Feilong Liu, Kaiyue Lian, Yantao Liang, Hongbing Shao, Andrew McMinn, Hualong Wang, Min Wang   +8 more
doaj   +1 more source

Identification of Free-living and Particle-Associated Microbial Communities Present in Hadal regions of the Mariana Trench

Frontiers in Microbiology, 2016
Relatively few studies have described the microbial populations present in ultra-deep hadal environments, largely as a result of difficulties associated with sampling. Here we report Illumina-tag V6 16S rRNA sequence-based analyses of the free-living and
Jonathan eTarn, Logan Maxwell Peoples, Kevin eHardy, James eCameron, Douglas Hoyt Bartlett   +4 more
doaj   +1 more source

High mercury accumulation in deep-ocean hadal sediments

Scientific Reports, 2021
Ocean sediments are the largest sink for mercury (Hg) sequestration and hence an important part of the global Hg cycle1. Yet accepted global average Hg flux data for deep-ocean sediments (> 200 m depth) are not based on measurements on sediments but are ...
Hamed Sanei, Peter M. Outridge, Kazumasa Oguri, Gary A. Stern, Bo Thamdrup, Frank Wenzhöfer, Feiyue Wang, Ronnie N. Glud   +7 more
doaj   +1 more source

Insight Into the Pico- and Nano-Phytoplankton Communities in the Deepest Biosphere, the Mariana Trench

Frontiers in Microbiology, 2018
As photoautotrophs, phytoplankton are generally present in the euphotic zone of the ocean, however, recently healthy phytoplankton cells were found to be also ubiquitous in the dark deep sea, i.e., at water depths between 2000 and 4000 m.
Ruoyu Guo, Yantao Liang, Yu Xin, Long Wang, Shanli Mou, Chunjie Cao, Ruize Xie, Chuanlun Zhang, Jiwei Tian, Yongyu Zhang   +9 more
doaj   +1 more source

Discovery and Fine‐Scale Mapping of Hadal Xenophyophore Habitat in the Nova Canton Trough, Central Pacific Ocean

Remote Sensing in Ecology and Conservation, EarlyView.
Discovery and fine‐scale mapping of a hadal xenophyophore field: submersible video transects and photogrammetry enable semi‐automated delineation of xenophyophores, revealing their abundance, spatial organisation, structural complexity and contribution to habitat heterogeneity at ~8000 m depth.
Denise J. B. Swanborn, Joana Gafeira, Megan Cundy, Daniel C. Bates, Heather A. Stewart, Alan J. Jamieson   +5 more
wiley   +1 more source

Microbial Community Diversity Within Sediments from Two Geographically Separated Hadal Trenches

Frontiers in Microbiology, 2019
Hadal ocean sediments, found at sites deeper than 6,000 m water depth, are thought to contain microbial communities distinct from those at shallower depths due to high hydrostatic pressures and higher abundances of organic matter.
Logan M. Peoples, Eleanna Grammatopoulou, Michelle Pombrol, Xiaoxiong Xu, Oladayo Osuntokun, Jessica Blanton, Eric E. Allen, Clifton C. Nunnally, Jeffrey C. Drazen, Daniel J. Mayor, Daniel J. Mayor, Douglas H. Bartlett   +11 more
doaj   +1 more source

DeepZoo: A cost‐effective and modular sampler for ecological studies in the deep ocean

Methods in Ecology and Evolution, EarlyView.
Abstract Understanding the structure and dynamics of deep‐ocean communities requires effective sampling of pelagic organisms in near‐bottom waters. These dispersive organisms contribute to biodiversity, connectivity and ecosystem recovery. Yet, current sampling methods remain constrained by size, cost, and depth, leaving key questions unanswered in ...
Johanna N. J. Weston, Casey Machado, Brian Kelly, Benjamin S. Weiss, Taylor P. Heyl, Daniel Lauretta, Lauren S. Mullineaux, Kirstin S. Meyer‐Kaiser   +7 more
wiley   +1 more source