Results 91 to 100 of about 977,545 (224)

Rethinking Plasticity in Sponges

open access: yesJournal of Experimental Zoology Part B: Molecular and Developmental Evolution, Volume 346, Issue 6, Page 431-446, September 2026.
This systematic review critiques the conceptual confusion caused by the indiscriminate use of “plasticity” in Porifera literature, revealing that researchers often overlook genetic variability and fail to distinguish between real‐time environmental responses and natural selection.
Laura Oliveira, Emilio Lanna
wiley   +1 more source

Benthic microbial communities of coastal terrestrial and ice shelf Antarctic meltwater ponds. [PDF]

open access: yes, 2015
The numerous perennial meltwater ponds distributed throughout Antarctica represent diverse and productive ecosystems central to the ecological functioning of the surrounding ultra oligotrophic environment.
Charles K. Lee   +13 more
core   +1 more source

Host Species Determines Symbiotic Community Composition in Antarctic Sponges (Porifera: Demospongiae)

open access: yesFrontiers in Marine Science, 2020
The microbiota of four Antarctic sponges, Dendrilla antarctica, Sphaerotylus antarcticus, Mycale acerata, and Hemigellius pilosus, collected at two South Shetland Islands and at two locations in the Antarctic Peninsula separated by ca.
Oriol Sacristán-Soriano   +3 more
doaj   +1 more source

Differences in Siderophore Production During the Growth of Phytoplankton in Southern Ocean Incubation Experiments Under High‐ and Low‐Iron Conditions

open access: yesEnvironmental Microbiology, Volume 28, Issue 9, September 2026.
Experiments performed in the Southern Ocean under low‐ and high‐iron conditions showed that the heterotrophic bacteria community produced distinct iron‐binding compounds called siderophores, depending on the environmental conditions, despite similar bacteria communities being present in each experiment.
Randelle M. Bundy   +9 more
wiley   +1 more source

Assessing the impact of sewage and wastewater on antimicrobial resistance in nearshore Antarctic biofilms and sediments

open access: yesEnvironmental Microbiome
Background Despite being recognised as a global problem, our understanding of human-mediated antimicrobial resistance (AMR) spread to remote regions of the world is limited.
Melody S Clark   +11 more
doaj   +1 more source

Characterization of psychrophilic bacteria with phosphorus solubilization activity and plant growth promotion

open access: yesRevista Peruana de Biología
Antarctica, a continent with one of the most hostile environments of the planet, harbors a high biodiversity of microorganisms that can be a potential source of biotechnological resources, including those capable of solubilizing phosphorus and promoting ...
Marcos Vera Morales   +3 more
doaj   +1 more source

Discovery of a cryptic aminoacidic triad involved in the temperature adaptation of GH1 enzymes

open access: yesThe FEBS Journal, Volume 293, Issue 17, Page 5282-5302, September 2026.
Cold‐active enzymes retain high catalytic activity at low temperatures but are characterized by thermal instability, a behavior not fully understood. Comparison between a cold‐active GH1 and its mesophilic counterparts highlights the role of a three‐residue motif (W‐M‐F) in conferring structural stability to a mesophilic GH1.
Stefania Digiovanni   +5 more
wiley   +1 more source

The ecological dichotomy of ammonia-oxidizing archaea and bacteria in the hyper-arid soils of the Antarctic Dry Valleys [PDF]

open access: yes, 2014
The McMurdo Dry Valleys of Antarctica are considered to be one of the most physically and chemically extreme terrestrial environments on the Earth. However, little is known about the organisms involved in nitrogen transformations in these environments ...
Charles K. Lee   +13 more
core   +1 more source

Identification of Microbial Dark Matter in Antarctic Environments

open access: yesFrontiers in Microbiology, 2018
Numerous studies have applied molecular techniques to understand the diversity, evolution, and ecological function of Antarctic bacteria and archaea. One common technique is sequencing of the 16S rRNA gene, which produces a nearly quantitative profile of
Jeff S. Bowman, Jeff S. Bowman
doaj   +1 more source

Tipping Points in Bacterial Richness Amplify Extracellular Enzyme Activities in Northern Peatlands

open access: yesGlobal Change Biology, Volume 32, Issue 9, September 2026.
Using a trans‐Holarctic survey in Sphagnum‐dominated peatlands, we identify a critical bacterial biodiversity threshold. Below this threshold, ecosystem function shifts, increasing enzyme activities by 60%, potentially accelerating carbon turnover. This weakens the peatland carbon sink, emphasizing the need to safeguard diversity.
Vincent E. J. Jassey   +75 more
wiley   +1 more source

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