Results 31 to 40 of about 4,142 (205)

Biotic and Isotopic Vestiges of Oligotrophy on Continental Shelves During Oceanic Anoxic Event 2 [PDF]

open access: yesGlobal Biogeochemical Cycles, 2021
AbstractThe widespread expansion of the oxygen minimum zone onto shelves has been commonly regarded as a primary cause of benthos extinction in epicratonic sea ecosystems during the Cenomanian–Turonian boundary event (CTBE). However, neither lithology, geochemical proxies, nor micropaleontological data support this hypothesis.
Zofia Dubicka   +3 more
openaire   +3 more sources

Archaea in organic-lean and organic-rich marine subsurface sediments: an environmental gradient reflected in distinct phylogenetic lineages

open access: yesFrontiers in Microbiology, 2012
Examining the patterns of archaeal diversity in little-explored organic-lean marine subsurface sediments presents an opportunity to study the association of phylogenetic affiliation and habitat preference in uncultured marine Archaea.
Alan M Durbin, Andreas eTeske
doaj   +1 more source

Comparative metagenomic analysis reveals mechanisms for stress response in hypoliths from extreme hyperarid deserts [PDF]

open access: yes, 2016
Understanding microbial adaptation to environmental stressors is crucial for interpreting broader ecological patterns. In the most extreme hot and cold deserts, cryptic niche communities are thought to play key roles in ecosystem processes and represent ...
Cowan, Don A.   +5 more
core   +3 more sources

Deep-sea meiofaunal and foraminiferal communities along a gradient of primary productivity in the eastern Mediterranean Sea

open access: yesScientia Marina, 2009
Benthic metazoa and stained foraminifera (>32 μm) were studied in relation to prevailing environmental parameters in the Aegean Sea (Sporades Basin and Cretan Sea) and Levantine Basin (Ierapetra Basin) during the METEOR Cruise 40 Leg 3 (December 1997 ...
Nikolaos Lampadariou   +2 more
doaj   +1 more source

Identification of a transcriptional regulator for oligotrophy-responsive promoter in Rhodococcus erythropolis N9T-4 [PDF]

open access: yesBioscience, Biotechnology, and Biochemistry, 2020
ABSTRACT Two genes, aldA, and mnoA, encoding an NAD-dependent aliphatic dehydrogenase and N,N′-dimethyl-4-nitrosoaniline-dependent methanol dehydrogenase, respectively, are strongly expressed when Rhodococcus erythropolis N9T-4 is grown under oligotrophic conditions.
Ryoji, Ikegaya   +4 more
openaire   +2 more sources

Deep silicon maxima in the stratified oligotrophic Mediterranean Sea [PDF]

open access: yes, 2010
The silicon biogeochemical cycle has been studied in the Mediterranean Sea during late summer/early autumn 1999 and summer 2008. The distribution of nutrients, particulate carbon and silicon, fucoxanthin (Fuco), and total chlorophyll-<i>a</i>
B. Quéguiner   +9 more
core   +4 more sources

Gene Expansion and Positive Selection as Bacterial Adaptations to Oligotrophic Conditions

open access: yesmSphere, 2019
We examined the genomic adaptations of prevalent bacterial taxa in a highly nutrient- and ion-depleted freshwater environment located in the secondary cooling water system of a nuclear research reactor.
Ruben Props   +5 more
doaj   +1 more source

Influence of Substrate Concentration on the Culturability of Heterotrophic Soil Microbes Isolated by High-Throughput Dilution-to-Extinction Cultivation

open access: yesmSphere, 2020
The vast majority of microbes inhabiting oligotrophic shallow subsurface soil environments have not been isolated or studied under controlled laboratory conditions. In part, the challenges associated with isolating shallow subsurface microbes may persist
Ryan P. Bartelme   +6 more
doaj   +1 more source

Study of Sea level changes with Leckie method of the Abderaz Formation (Middle Turonian-Early Campanian) at type section based on foraminifera [PDF]

open access: yes, 2010
In this research the Abderaz Formation at its type section with an age of Turonian-early Campanian and a thickness of 300 m containing.light grey shale and marls was investigated.
Abbas Abbasi, Meysam Shafiee Ardestani
core   +2 more sources

Intermediate water flows in the western South Pacific: as revealed by individual Argo floats trajectories and a model re-analysis [PDF]

open access: yesBiogeosciences, 2018
Thanks to the autonomous Argo floats of the OUTPACE cruise (Oligotrophy to UlTra-oligotrophy PACific Experiment) and of the THOT (TaHitian Ocean Time series) project, some features of intermediate-flow dynamics, at around 1000 m depth, within the ...
S. Barbot, A. Petrenko, C. Maes
doaj   +1 more source

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