Results 11 to 20 of about 18,233 (176)

Marine archaea and their functional networks in oceanic biogeochemical cycling

Discover Oceans
Marine archaea are nowadays recognized as central elements in ocean food webs, playing key roles in global nitrogen cycling and other biogeochemical processes. Metabolic diversity enables marine archaea to exist in environments from nutrient-poor surface
Sameer M. Sheikh, Ujban Md. Hussain, Payal D. Umare, Divya L. Jethani, Satyendra K. Prasad   +4 more
doaj   +2 more sources

Metabolic activities of marine ammonia‐oxidizing archaea orchestrated by quorum sensing [PDF]

mLife, 2023
Ammonia‐oxidizing archaea (AOA) play crucial roles in marine carbon and nitrogen cycles by fixing inorganic carbon and performing the initial step of nitrification. Evaluation of carbon and nitrogen metabolism popularly relies on functional genes such as
Olivier Pereira, Wei Qin, Pierre E. Galand, Didier Debroas, Raphael Lami, Corentin Hochart, Yangkai Zhou, Jin Zhou, Chuanlun Zhang   +8 more
doaj   +4 more sources

Contributions of single-cell genomics to our understanding of planktonic marine archaea. [PDF]

Philos Trans R Soc Lond B Biol Sci, 2019
Single-cell genomics has transformed many fields of biology, marine microbiology included. Here, we consider the impact of single-cell genomics on a specific group of marine microbes—the planktonic marine archaea. Despite single-cell enabled discoveries of novel metabolic function in the marine thaumarchaea, population-level investigations are hindered
Santoro AE, Kellom M, Laperriere SM.
europepmc   +7 more sources

Membraneless channels sieve cations in ammonia-oxidizing marine archaea. [PDF]

Nature
AbstractNitrosopumilus maritimus is an ammonia-oxidizing archaeon that is crucial to the global nitrogen cycle1,2. A critical step for nitrogen oxidation is the entrapment of ammonium ions from a dilute marine environment at the cell surface and their subsequent channelling to the cell membrane of N. maritimus.
von Kügelgen A, Cassidy CK, van Dorst S, Pagani LL, Batters C, Ford Z, Löwe J, Alva V, Stansfeld PJ, Bharat TAM.   +9 more
europepmc   +4 more sources

Catabolic protein degradation in marine sediments confined to distinct archaea [PDF]

The ISME Journal, 2022
Abstract Metagenomic analysis has facilitated prediction of a variety of carbon utilization potentials by uncultivated archaea including degradation of protein, which is a wide-spread carbon polymer in marine sediments. However, the activity of detrital catabolic protein degradation is mostly unknown for the vast majority of archaea ...
Xiuran Yin, Guo‐Wei Zhou, Mingwei Cai, Qingzeng Zhu, Tim Richter‐Heitmann, David A. Aromokeye, Yang Liu, Rolf Nimzyk, Qingfei Zheng, Xiaoyu Tang, Marcus Elvert, Meng Li, Michael W. Friedrich   +12 more
openaire   +2 more sources

Association of Marine Archaea with the Digestive Tracts of Two Marine Fish Species [PDF]

Applied and Environmental Microbiology, 1998
ABSTRACT Recent studies have shown that archaea which were always thought to live under strict anoxic or extreme environmental conditions are also present in cold, oxygenated seawater, soils, the digestive tract of a holothurian deep-sea-deposit feeder, and a marine sponge.
Maarel, Marc J.E.C. van der, Artz, Rebekka R.E., Haanstra, Rene, Forney, Larry J.   +3 more
openaire   +3 more sources

Role for urea in nitrification by polar marine Archaea. [PDF]

Proc Natl Acad Sci U S A, 2012
Despite the high abundance of Archaea in the global ocean, their metabolism and biogeochemical roles remain largely unresolved. We investigated the population dynamics and metabolic activity of Thaumarchaeota in polar environments, where these microorganisms are particularly abundant and ...
Alonso-Sáez L, Waller AS, Mende DR, Bakker K, Farnelid H, Yager PL, Lovejoy C, Tremblay JÉ, Potvin M, Heinrich F, Estrada M, Riemann L, Bork P, Pedrós-Alió C, Bertilsson S.   +14 more
europepmc   +6 more sources

Genomic Insights into Niche Partitioning across Sediment Depth among Anaerobic Methane-Oxidizing Archaea in Global Methane Seeps

mSystems, 2023
Marine sediments are important methane reservoirs. Methane efflux from the seabed is significantly restricted by anaerobic methanotrophic (ANME) archaea through a process known as anaerobic oxidation of methane (AOM).
Jiawei Chen, Yingdong Li, Cheng Zhong, Zhimeng Xu, Guangyuan Lu, Hongmei Jing, Hongbin Liu   +6 more
doaj   +1 more source

Using metagenomics tool to evaluate the enrichment efficiency of methanogens in marine sediment in Truong Sa archipelage, Khanh Hoa province, Vietnam [PDF]

E3S Web of Conferences, 2023
Methanogens (archaea bacteria that produce methan) play an important role in the anaerobic digestion of organic waste, however, in marine environment, the low density of methanogens makes anaerobic digestion very slow.
Nguyen Thu Hoai, Do Thi Tuyen, Le Van Thang, Nguyen Thi Kim Thanh, Pham Thi Thu Huyen, Do Thi Thu Hong   +5 more
doaj   +1 more source

Contrasting bacterial and archaeal distributions reflecting different geochemical processes in a sediment core from the Pearl River Estuary

AMB Express, 2020
Microbial community structure and metabolic activities have profound impacts on biogeochemical processes in marine sediments. Functional bacteria such as nitrate- and sulfate-reducing bacteria respond to redox gradients by coupling specific reactions ...
Wenxiu Wang, Jianchang Tao, Haodong Liu, Penghui Li, Songze Chen, Peng Wang, Chuanlun Zhang   +6 more
doaj   +1 more source