scholarly journals Tardigrades, Water Bears, Moss Piglets Tardigrada (Spallanzani 1777)

EDIS ◽  
2021 ◽  
Vol 2021 (2) ◽  
pp. 2
Author(s):  
Carrie Suen ◽  
Jennifer Lynn Gillett-Kaufman
Keyword(s):  
Deep Sea ◽  
Extreme Environments ◽  
Scientific Research ◽  
Model Organism ◽  
Aquatic Environments ◽  
Mud Volcanoes ◽  
Vast Array ◽  
Water Bears

Tardigrades, commonly known as water bears, are a type of microscopic animal found across a vast array of moist and aquatic environments. Tardigrades are known for their extensive resilience due to the fact that they are also found in extreme environments such as Antarctica, deep sea vents, and mud volcanoes. They are commonly used as a model organism for scientific research. Also published on the Featured Creatures website at http://entnemdept.ufl.edu/creatures/MISC/tardigrade.html

scholarly journals Tripartite holobiont system in a vent snail broadens the concept of chemosymbiosis

2020 ◽  
Author(s):  
Yi Yang ◽  
Jin Sun ◽  
Chong Chen ◽  
Yadong Zhou ◽  
Yi Lan ◽  
...  
Keyword(s):  
Virulence Factors ◽  
Deep Sea ◽  
Extreme Environments ◽  
Host Immunity ◽  
Energy Sources ◽  
High Quality ◽  
Genomic Plasticity ◽  
Changing Environments ◽  
Metabolic Heterogeneity ◽  
Genomic Basis

AbstractMany animals inhabiting deep-sea vents are energetically dependent on chemosynthetic endosymbionts, but how such symbiont community interacts with host, and whether other nutritional sources are available to such animals remain unclear. To reveal the genomic basis of symbiosis in the vent snail Alviniconcha marisindica, we sequenced high-quality genomes of the host and gill campylobacterial endosymbionts, as well as metagenome of the gut microbiome. The gill endosymbiont has a streamlined genome for efficient chemoautotrophy, but also shows metabolic heterogeneity among populations. Inter- and intra-host variabilities among endosymbiont populations indicate the host poses low selection on gill endosymbionts. Virulence factors and genomic plasticity of the endosymbiont provide advantages for cooperating with host immunity to maintain mutualism and thriving in changing environments. In addition to endosymbiosis, the gut and its microbiome expand the holobiont’s utilisation of energy sources. Host-microbiota mutualism contributes to a highly flexible holobiont that can excel in various extreme environments.

A Design Study of Manned Deep Submergence Research Vehicles in Japan

2004 ◽  
Vol 38 (1) ◽  
pp. 40-51 ◽  
Author(s):  
Dan Ohno ◽  
Yozo Shibata ◽  
Hisao Tezuka ◽  
Hideyuki Morihana ◽  
Ryuichiro Seki
Keyword(s):  
Deep Sea ◽  
Ad Hoc ◽  
Autonomous Underwater Vehicles ◽  
Scientific Research ◽  
Underwater Vehicles ◽  
Remotely Operated Vehicles ◽  
Design Study ◽  
General Overview

This paper covers the results of a design study recently completed in Japan on manned submergence research vehicles equipped with Autonomous Underwater Vehicles (AUVs) and/or Remotely Operated Vehicles (ROVs). The primary features and general overview of the vehicle designs are described, and some of the major items to be examined in each study are introduced.At the outset of this study, the opinions of many domestic scientists and scholars were collected in order to identify the most important subjects of future scientific research in the deep ocean.This study was carried out by the "ad hoc Committee" organized by the Japan Deep Sea Technology Association.

Mathematical model of accumulation of gas hydrates associated with deep-sea mud volcanoes

2017 ◽  
Vol 474 (1) ◽  
pp. 604-606 ◽  
Author(s):  
R. A. Zhostkov ◽  
A. L. Sobisevich ◽  
E. I. Suetnova
Keyword(s):  
Mathematical Model ◽  
Gas Hydrates ◽  
Deep Sea ◽  
Mud Volcanoes ◽  
Sea Mud

A community-supported metaproteomic pipeline for improving peptide identifications in hydrothermal vent microbiota

2021 ◽  
Author(s):  
Yafei Chang ◽  
Qilian Fan ◽  
Jialin Hou ◽  
Yu Zhang ◽  
Jing Li
Keyword(s):  
Deep Sea ◽  
Hydrothermal Vent ◽  
Hydrothermal Vents ◽  
Extreme Environments ◽  
Reference Database ◽  
False Discovery Rate Method ◽  
Analysis Strategy ◽  
Gene Database ◽  
And Function ◽  
Functional Profiles

Abstract Microorganisms in deep-sea hydrothermal vents provide valuable insights into life under extreme conditions. Mass spectrometry-based proteomics has been widely used to identify protein expression and function. However, the metaproteomic studies in deep-sea microbiota have been constrained largely by the low identification rates of protein or peptide. To improve the efficiency of metaproteomics for hydrothermal vent microbiota, we firstly constructed a microbial gene database (HVentDB) based on 117 public metagenomic samples from hydrothermal vents and proposed a metaproteomic analysis strategy, which takes the advantages of not only the sample-matched metagenome, but also the metagenomic information released publicly in the community of hydrothermal vents. A two-stage false discovery rate method was followed up to control the risk of false positive. By applying our community-supported strategy to a hydrothermal vent sediment sample, about twice as many peptides were identified when compared with the ways against the sample-matched metagenome or the public reference database. In addition, more enriched and explainable taxonomic and functional profiles were detected by the HVentDB-based approach exclusively, as well as many important proteins involved in methane, amino acid, sugar, glycan metabolism and DNA repair, etc. The new metaproteomic analysis strategy will enhance our understanding of microbiota, including their lifestyles and metabolic capabilities in extreme environments. The database HVentDB is freely accessible from http://lilab.life.sjtu.edu.cn:8080/HventDB/main.html.

The Evolution of Gas Hydrate Accumulations in Zones of Deep-Sea Mud Volcanoes

2019 ◽  
Vol 13 (2) ◽  
pp. 107-111
Author(s):  
A. L. Sobisevich ◽  
E. I. Suetnova ◽  
R. A. Zhostkov
Keyword(s):  
Gas Hydrate ◽  
Deep Sea ◽  
Mud Volcanoes ◽  
Sea Mud

scholarly journals RETRACTED ARTICLE: Novel life history strategy in a deep sea fish challenges assumptions about reproduction in extreme environments

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Randal A. Singer ◽  
Jon A. Moore ◽  
Edward L. Stanley
Keyword(s):  
Life History ◽  
Deep Sea ◽  
Extreme Environments ◽  
Life History Strategy ◽  
Deep Ocean ◽  
Homogeneous System ◽  
Life History Strategies ◽  
Life History Trait ◽  
Retracted Article ◽  
Sea Fish

Abstract The deep ocean is frequently assumed to be a homogeneous system lacking the same diverse life history strategies found in shallower waters. However, as our methods for exploring the deep ocean improve, common assumptions about dispersal, reproduction and behavior are constantly being challenged. Fishes exhibit the most diverse reproductive strategies among vertebrates. Understanding life history strategies in deep-sea environments is lacking for many species of fishes. Here, we report a novel reproductive strategy where a fish (Parazen pacificus) provides parental care via mouth brooding. This behavior is observed from a specimen collected with eggs present in the buccal cavity, along with other specimens exhibiting pre-brooding morphologies. This is the first description of this unique life history trait in a deep-sea fish and fills in a gap in the larval literature for this family of fishes and prompts further investigation into other novel reproductive modes of deep-sea fauna.

scholarly journals The Mycobiota of the Deep Sea: What Omics Can Offer

Life ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 292
Author(s):  
Lluvia Vargas-Gastélum ◽  
Meritxell Riquelme
Keyword(s):  
Deep Sea ◽  
Fungal Diversity ◽  
High Salinity ◽  
Extreme Environments ◽  
Abiotic Conditions ◽  
Culture Independent ◽  
Sequencing Platforms ◽  
Generation Sequencing ◽  
Culture Dependent

The deep sea (>1000 m below sea level) represents one of the most extreme environments of the ocean. Despite exhibiting harsh abiotic conditions such as low temperatures, high hydrostatic pressure, high salinity concentrations, a low input of organic matter, and absence of light, the deep sea encompasses a great fungal diversity. For decades, most knowledge on the fungal diversity of the deep sea was obtained through culture-dependent techniques. More recently, with the latest advances of high-throughput next generation sequencing platforms, there has been a rapid increment in the number of studies using culture-independent techniques. This review brings into the spotlight the progress of the techniques used to assess the diversity and ecological role of the deep-sea mycobiota and provides an overview on how the omics technologies have contributed to gaining knowledge about fungi and their activity in poorly explored marine environments. Finally, current challenges and suggested coordinated efforts to overcome them are discussed.

Active mud volcanoes on the upper slope of the western Nile deep-sea fan—first results from the P362/2 cruise of R/V Poseidon

2010 ◽  
Vol 30 (3-4) ◽  
pp. 169-186 ◽  
Author(s):  
Tomas Feseker ◽  
Kevin R. Brown ◽  
Cecile Blanchet ◽  
Florian Scholz ◽  
Marianne Nuzzo ◽  
...  
Keyword(s):  
Deep Sea ◽  
Mud Volcanoes ◽  
First Results ◽  
Sea Fan ◽  
Upper Slope

scholarly journals Additions to the Tanaidomorpha (Crustacea: Tanaidacea) from mud volcanoes and coral mounds of the Gulf of Cadiz and Horseshoe Continental Rise

Zootaxa ◽  
2018 ◽  
Vol 4377 (4) ◽  
pp. 517
Author(s):  
PATRICIA ESQUETE ◽  
MARINA R. CUNHA
Keyword(s):  
Deep Sea ◽  
Type Species ◽  
Shallow Waters ◽  
Mud Volcanoes ◽  
Gulf Of Cadiz ◽  
Study Region ◽  
Continental Rise ◽  
Worldwide Distribution ◽  
Gulf Of Cádiz ◽  
First Time

The Tanaidacea collection from various research cruises carried out in the Gulf of Cadiz and Horseshoe Continental Rise between 2004 and 2012 yielded four species new to science that are described herein. Two belong to genera recorded for the first time since the original descriptions of their type species: Cetiopyge, described from the Gulf of Mexico and Gamboa from shallow waters of Macaronesia. The other two belong to the genera Collettea and Paragathotanais, both with a worldwide distribution. Additionally, specimens of Tumidochelia uncinata are described and illustrated to complete previous descriptions. Identification keys to all known genera of Nototanaidae, and the Eastern Atlantic species of Paragathotanais and Collettea are provided. This works raises the number of tanaidacean species known from the deep-sea habitats in the study region to a total of 22. 

Investigation on the Precocity of Regenerated Seedlings from Micro Tom

2011 ◽  
Vol 365 ◽  
pp. 421-427
Author(s):  
Yan Xu ◽  
Sheng Ta Jin ◽  
Mei Ling Zhao ◽  
Wei Shi ◽  
Qian Sheng Liao ◽  
...  
Keyword(s):  
Life Cycle ◽  
Lycopersicon Esculentum ◽  
Culture Medium ◽  
Scientific Research ◽  
Model Organism ◽  
Ms Medium ◽  
Short Life ◽  
Initial Height ◽  
External Conditions

Micro Tom is a novel breed model organism of Lycopersicon esculentum Mill. It has the a short life cycle and is dwarf and miniature. Owing to these characters, the utilization of Micro Tom can decrease the period of scientific research greatly and save time and space for breeding, so its application is more and more broad. In this paper, we successfully induced the regenerated seedlings from Micro Tom to bear fruits in advance by controlling and optimizing several external conditions such as the initial height of the regenerated seedlings, the culture medium, the photoperiod and the temperatures, etc. Before maturity induction, we firstly investigated the proper methods for plantlets regeneration and got a relative complete data. In the later investigation on precocity inducing we found that the optimum inducing culture medium is MS medium supplemented with 0.1 mg/L NAA and 0.5 mg/L IBA, the proper height of seedlings is 2.0-2.5 cm, the best photoperiod is 18-20h, and the most efficient culturing temperature is 22-26°C. In this way we can get regenerated seedlings from Micro Tom in an efficient way and make them precocity in vitro.

Sign in / Sign up

Export Citation Format

Share Document