Results 181 to 190 of about 13,180,923 (227)

A Fault-tolerant Free-vehicle Architecture for Hadal Zone Exploration

Global Oceans 2020: Singapore – U.S. Gulf Coast, 2020
The usage of free vehicles (FV) in deep sea exploration has evolved during the last 75 years through different technologies. Hardened glass spheres have enabled contemporary vehicles that seamlessly combine housing, buoyancy, and full ocean depth deployment capability in simple structures that have opened the door to studying the extreme and remote ...
Manuel Jimenez, Wilford Schmidt, Danilo Rojas   +2 more
openaire   +1 more source

Vertical zonation patterns of scavenging amphipods from the Hadal zone of the Tonga and Kermadec Trenches

Deep Sea Research Part I: Oceanographic Research Papers, 2006
Abstract Deep-sea trenches present an ideal system in which to study vertical zonation, though the difficulties inherent in studying these great depths have thus far deterred such research. Here, we present the first account of the structure and vertical zonation of the scavenging guild residing in the hadal habitat of the Tonga and Kermadec Trenches
L. E. Blankenship, A. Yayanos, D. Cadien, L. Levin   +3 more
semanticscholar   +2 more sources

The Hadal Zone

2015
The hadal zone represents one of the last great frontiers in marine science, accounting for 45% of the total ocean depth range. Despite very little research effort since the 1950s, the last ten years has seen a renaissance in hadal exploration, almost certainly as a result of technological advances that have made this otherwise largely inaccessible ...
openaire   +1 more source

Zoogeography of the Abyssal and Hadal Zones

1997
Abstract Deep-sea bottom-living macroinvertebrates occurring below 3000 m depth include some species with a broad cosmopolitan geographical distribution and others with more limited, sometimes local, ranges. Taxa containing a large number of species with a wide vertical range (eurybathic) have a wider horizontal distribution than those dominated by ...
openaire   +1 more source

Biotransformations of arsenic in marine sediments across marginal slope to hadal zone

Journal of Hazardous Materials
Arsenic compounds are accumulating in deep ocean, but their ecological impacts on deep-sea ecosystem remain elusive. We studied 32 sediment cores (101 layers for metagenomes, along with 41 global reference sediment metagenomes) collected from the South China Sea and the Mariana Trench (MT), characterized with high arsenic accumulation in MT.
Zhuobo, Li, Yinghui, He, Hongxi, Zhang, Haifeng, Qian, Yong, Wang   +4 more
openaire   +2 more sources

Exploring the hadal zone with lab-on-chip sensors

Nature Reviews Earth & Environment
Leah Brinch-Iversen explains how lab-on-chip sensors can be used to monitor the deep ocean.
openaire   +1 more source

Water characteristics of abyssal and hadal zones in the southern Yap Trench observed with the submersible Jiaolong

Journal of Oceanology and Limnology, 2019
Using observations in an applied cruise of the submersible Jiaolong, water characteristics, geostrophic transport, and turbulent mixing in abyssal and hadal zones of the southern Yap Trench were studied. The spatial structures of deep water show that the abyssal water is cold, saline, and oxygen rich. The hadal water has very small changes in potential
Xuehai Liu, Yongzhi Liu, Wei Cao, Chengjun Sun   +3 more
openaire   +1 more source

Comparison of Deep-Sea Picoeukaryotic Composition Estimated from the V4 and V9 Regions of 18S rRNA Gene with a Focus on the Hadal Zone of the Mariana Trench

Microbial Ecology, 2021
Yuye Han, Cui Guo, Xuran Guan, A. McMinn, Lu Liu, Guiliang Zheng, Yong Jiang, Yantao Liang, Hongbing Shao, Jiwei Tian, Min Wang   +10 more
semanticscholar   +1 more source

The amphipod genome reveals population dynamics and adaptations to hadal environment.

Cell
The amphipod Hirondellea gigas is a dominant species inhabiting the deepest part of the ocean (∼6,800-11,000 m), but little is known about its genetic adaptation and population dynamics. Here, we present a chromosome-level genome of H.
Haibin Zhang, Shuai Sun, Jun Liu, Qunfei Guo, Liang Meng, Jianwei Chen, Xueyan Xiang, Yang Zhou, Nannan Zhang, Helu Liu, Yalin Liu, Guoyong Yan, Qianyue Ji, Lisheng He, Shanya Cai, Chongyang Cai, Xin Huang, Shiyu Xu, Yunlu Xiao, Yang Zhang, Kun Wang, Yujing Liu, Haixin Chen, Zhen Yue, Shunping He, Jian Wang, Huanming Yang, Xin Liu, Inge Seim, Ying Gu, Qiye Li, Guojie Zhang, Simon Ming-Yuen Lee, Karsten Kristiansen, Xun Xu, Shanshan Liu, Guangyi Fan   +36 more
semanticscholar   +1 more source

Anthropogenic Shadows in the Earth's Deepest Environments: Insights into Hadal Zone Pollution

The hadal trenches, with depths exceeding 6,000 meters, are critical yet understudied sinks for anthropogenic pollutants. However, advances in deep-sea technology and growing interest in ocean health drive the need for new tools to study deep-sea sediments. This study explores the prevalence and impact of organic and inorganic contaminants in the Japan
Sara Trotta, Piero Bellanova, Jan Schwarzbauer   +2 more
openaire   +1 more source