Results 21 to 30 of about 525 (166)

Geology, environment, and life in the deepest part of the world’s oceans

The Innovation, 2021
Summary: The hadal zone, mostly comprising of deep trenches and constituting of the deepest part of the world’s oceans, represents the least explored habitat but one of the last frontiers on our planet.
Mengran Du, Xiaotong Peng, Haibin Zhang, Cong Ye, Shamik Dasgupta, Jiwei Li, Jiangtao Li, Shuangquan Liu, Hengchao Xu, Chuanxu Chen, Hongmei Jing, Hongzhou Xu, Jun Liu, Shunping He, Lisheng He, Shanya Cai, Shun Chen, Kaiwen Ta   +17 more
doaj   +1 more source

Megafaunal Community Structure From the Abyssal to Hadal Zone in the Yap Trench

Frontiers in Marine Science, 2021
Hadal trenches remain one of the unexplored ocean ecosystems due to the challenges of sampling at great depths. It is still unclear how a faunal community changes from the abyssal to the hadal zone, and which environmental variables are the key impacting
Dongsheng Zhang, Dongsheng Zhang, Dongsheng Zhang, Yadong Zhou, Jichao Yang, Thomas Linley, Ruiyan Zhang, Ruiyan Zhang, Bo Lu, Peng Xu, Chengcheng Shen, Shiquan Lin, Yueyun Wang, Dong Sun, Xiaogu Wang, Chunsheng Wang, Chunsheng Wang, Chunsheng Wang, Chunsheng Wang   +18 more
doaj   +1 more source

Metagenomic Insights Into the Structure and Function of Intestinal Microbiota of the Hadal Amphipods

Frontiers in Microbiology, 2021
Hadal trenches are the deepest known areas of the ocean. Amphipods are considered to be the dominant scavengers in the hadal food webs. The studies on the structure and function of the hadal intestinal microbiotas are largely lacking.
Jiulin Chan, Daoqiang Geng, Binbin Pan, Binbin Pan, Qiming Zhang, Qianghua Xu, Qianghua Xu, Qianghua Xu   +7 more
doaj   +1 more source

Flourishing chemosynthetic life at the greatest depths of hadal trenches. [PDF]

Nature
Hadal trenches, some of the Earth’s least explored and understood environments, have long been proposed to harbour chemosynthesis-based communities1,2. Despite increasing attention, actual documentation of such communities has been exceptionally rare3,4. Here we report the discovery of the deepest and the most extensive chemosynthesis-based communities
Peng X, Du M, Gebruk A, Liu S, Gao Z, Glud RN, Zhou P, Wang R, Rowden AA, Kamenev GM, Maiorova AS, Papineau D, Chen S, Gao J, Liu H, He Y, Alalykina IL, Dolmatov IY, Zhang H, Li X, Malyutina MV, Dasgupta S, Saulenko AA, Shilov VA, Liu S, Xie T, Qu Y, Song X, Zhang H, Liu H, Zhang W, Huang X, Xu H, Xu W, Mordukhovich VV, Adrianov AV.   +35 more
europepmc   +4 more sources

Hadal water biogeochemistry over the Izu–Ogasawara Trench observed with a full-depth CTD-CMS [PDF]

Ocean Science, 2018
Full-depth profiles of hydrographic and geochemical properties at the Izu–Ogasawara Trench were observed for the first time using a CTD-CMS (conductivity–temperature–depth profiler with carousel multiple sampling) system.
S. Kawagucci, S. Kawagucci, S. Kawagucci, S. Kawagucci, A. Makabe, A. Makabe, A. Makabe, T. Kodama, Y. Matsui, Y. Matsui, C. Yoshikawa, C. Yoshikawa, E. Ono, E. Ono, M. Wakita, T. Nunoura, T. Nunoura, H. Uchida, T. Yokokawa, T. Yokokawa   +19 more
doaj   +1 more source

Active Silica Diagenesis in the Deepest Hadal Trench Sediments

Geophysical Research Letters, 2022
AbstractPorewater dissolved silicic acid (DSi) concentrations and stable Si isotope compositions (δ30Si) together with biogenic silica (bSiO2) contents of sediments in five sediment cores collected from the southern Mariana Trench are presented. These data suggest the occurrence of bSiO2 dissolution and concomitant authigenic clay formation in three ...
Min Luo, Weiding Li, Sonja Geilert, Andrew W. Dale, Zijun Song, Duofu Chen   +5 more
openaire   +4 more sources

Hadal trenches are dynamic hotspots for early diagenesis in the deep sea [PDF]

Communications Earth & Environment, 2021
AbstractThe deepest part of the global ocean, hadal trenches, are considered to act as depocenters for organic material. Relatively high microbial activity has been demonstrated in the deepest sections of some hadal trenches, but the deposition dynamics are thought to be spatially and temporally variable.
Ronnie N. Glud, Peter Berg, Bo Thamdrup, Morten Larsen, Heather A. Stewart, Alan J. Jamieson, Anni Glud, Kazumasa Oguri, Hamed Sanei, Ashley A. Rowden, Frank Wenzhöfer   +10 more
openaire   +6 more sources

High Carbon Mineralization Rates in Subseafloor Hadal Sediments—Result of Frequent Mass Wasting

Geochemistry, Geophysics, Geosystems, 2022
In the past 20 years, the exploration of deep ocean trenches has led to spectacular new insights. Even in the deepest canyons, an unusual variety of life and unexpectedly high benthic oxygen consumption rates have been detected while microbial processes ...
M. Zabel, R. N. Glud, H. Sanei, M. Elvert, T. Pape, P.‐C. Chuang, E. Okuma, P. Geprägs, M. Kölling   +8 more
doaj   +1 more source

A new predator connecting the abyssal with the hadal in the Kuril-Kamchatka Trench, NW Pacific [PDF]

PeerJ, 2018
The bathyal to hadal deep sea of north-west Pacific Ocean was recently intensively sampled during four international expeditions (KuramBio I and II, SoJaBio and SokhoBio). A large amphipod, Rhachotropis saskia n.
Anne-Nina Lörz, Anna Maria Jażdżewska, Angelika Brandt   +2 more
doaj   +2 more sources

Revealing the Viral Community in the Hadal Sediment of the New Britain Trench [PDF]

Genes, 2021
Marine viruses are widely distributed and influence matter and energy transformation in ecosystems by modulating hosts’ metabolism. The hadal trenches represent the deepest marine habitat on Earth, for which the viral communities and related biogeochemical functions are least explored and poorly understood.
Hui Zhou, Ping Chen, Mengjie Zhang, Jiawang Chen, Jiasong Fang, Xuan Li   +5 more
openaire   +2 more sources