Human‐induced salinity changes impact marine organisms and ecosystems

Global Change Biology, Год журнала: 2023, Номер 29(17), С. 4731 - 4749

Опубликована: Июль 12, 2023

Abstract Climate change is fundamentally altering marine and coastal ecosystems on a global scale. While the effects of ocean warming acidification ecology ecosystem functions services are being comprehensively researched, less attention directed toward understanding impacts human‐driven salinity changes. The water cycle operates through fluxes expressed as precipitation, evaporation, freshwater runoff from land. Changes to these in turn modulate shape environment by affecting currents, stratification, oxygen saturation, sea level rise. Besides direct impact physical processes, changes biological with ecophysiological consequences poorly understood. This surprising may diversity, habitat structure loss, community shifts including trophic cascades. model future projections (of end century changes) indicate magnitudes that lead modification open plankton suitability coral reef communities. Such also capable diversity metabolic capacity microorganisms impairing photosynthetic (coastal ocean) phytoplankton, macroalgae, seagrass, downstream ramifications biogeochemical cycling. scarcity comprehensive data dynamic regions warrants additional attention. datasets crucial quantify salinity‐based function relationships project such ultimately link into carbon sequestration well food availability human populations around globe. It critical integrate vigorous high‐quality interacting key environmental parameters (e.g., temperature, nutrients, oxygen) for anthropogenically induced its health economy.

Язык: Английский

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The vertical partitioning between denitrification and dissimilatory nitrate reduction to ammonium of coastal mangrove sediment microbiomes

Water Research, Год журнала: 2024, Номер 262, С. 122113 - 122113

Опубликована: Июль 19, 2024

Язык: Английский

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Unveiling long-term combined effect of salinity and Lead(II) on anammox activity and microbial community dynamics in saline wastewater treatment

Bioresource Technology, Год журнала: 2024, Номер 402, С. 130767 - 130767

Опубликована: Апрель 30, 2024

Язык: Английский

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Osmoregulation in freshwater anaerobic methane-oxidizing archaea under salt stress

The ISME Journal, Год журнала: 2024, Номер 18(1)

Опубликована: Янв. 1, 2024

Climate change-driven sea level rise threatens freshwater ecosystems and elicits salinity stress in microbiomes. Methane emissions these systems are largely mitigated by methane-oxidizing microorganisms. Here, we characterized the physiological metabolic response of methanotrophic archaea to salt stress. In our microcosm experiments, inhibition started at 1%. However, during gradual increase up 3% a reactor over 12 weeks, culture continued oxidize methane. Using gene expression profiles metabolomics, identified pathway for salt-stress that produces osmolyte anaerobic archaea: N(ε)-acetyl-β-L-lysine. An extensive phylogenomic analysis on N(ε)-acetyl-β-L-lysine-producing enzymes revealed they widespread across both bacteria archaea, indicating potential horizontal transfer link BORG extrachromosomal elements. Physicochemical bioreactor biomass further indicated presence sialic acids consumption intracellular polyhydroxyalkanoates methanotrophs

Язык: Английский

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Habitat Transition in the Evolution of Bacteria and Archaea

Annual Review of Microbiology, Год журнала: 2023, Номер 77(1), С. 193 - 212

Опубликована: Апрель 26, 2023

Related groups of microbes are widely distributed across Earth's habitats, implying numerous dispersal and adaptation events over evolutionary time. However, relatively little is known about the characteristics mechanisms these habitat transitions, particularly for populations that reside in animal microbiomes. Here, we review literature concerning transitions among a variety bacterial archaeal lineages, considering frequency migration events, potential environmental barriers, to new physicochemical conditions, including modification protein inventories other genomic characteristics. Cells dependent on microbial hosts, bacteria from Candidate Phyla Radiation, have undergone repeated sources into We compare their trajectories those both free-living cells-including Melainabacteria, Elusimicrobia, methanogenic archaea-and cellular endosymbionts bacteriophages, which made similar transitions. conclude by highlighting major related topics may be worthy future study.

Язык: Английский

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Protein Phosphorylation Nexus of Cyanobacterial Adaptation and Metabolism

Kinases and Phosphatases, Год журнала: 2024, Номер 2(2), С. 209 - 223

Опубликована: Июнь 20, 2024

Protein phosphorylation serves as a fundamental regulatory mechanism to modulate cellular responses environmental stimuli and plays crucial role in orchestrating adaptation metabolic homeostasis various diverse organisms. In cyanobacteria, an ancient phylum of significant ecological biotechnological relevance, protein emerges central axis mediating adaptive that are essential for survival growth. This exhaustive review thoroughly explores the complex terrain cyanobacterial metabolism, illustrating its forms functional implications. Commencing with overview physiology historical trajectory research prokaryotes, this navigates through mechanisms two-component sensory systems their interplay phosphorylation. Furthermore, it investigates different feeding modes cyanobacteria highlights between photoautotrophy, variables, susceptibility photo-inhibition. The elucidation coordinating light harvesting acquisition inorganic nutrients underscores importance physiology. novelty by synthesizing existing knowledge proposing future trajectories, thereby contributing deeper regulation

Язык: Английский

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Microbial communities in Hudson Strait amidst rapid environmental changes

Canadian Journal of Microbiology, Год журнала: 2025, Номер unknown

Опубликована: Янв. 23, 2025

Climate change is rapidly altering Arctic marine environments, leading to warmer waters, increased river discharge, and accelerated sea ice melt. The Hudson Bay Marine System (HBMS) experiences the fastest rate of loss in Canadian North resulting a prolonged open water season during summer months. We examined microbial communities Strait using high throughput 16s rRNA gene sequencing peak summer, which bay was almost completely ice-free, air temperatures were high. found that salinity temperature significantly affected taxonomic composition among across sites. observed higher relative abundance specific Polaribacter sp. ASVs at more saline Shannon diversity not impacted by or temperature. These results contribute our understanding surface community shed light on how future conditions may favour certain populations.

Язык: Английский

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Gut microbiota dysbiosis triggered by salinity stress enhances systemic inflammation in spotted scat (Scatophagus argus)

Fish & Shellfish Immunology, Год журнала: 2025, Номер unknown, С. 110353 - 110353

Опубликована: Апрель 1, 2025

Язык: Английский

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Macroevolutionary dynamics in micro-organisms: generalists give rise to specialists across biomes in the ubiquitous bacterial phylum Myxococcota

Molecular Biology and Evolution, Год журнала: 2024, Номер 41(5)

Опубликована: Май 1, 2024

Abstract Prokaryotes dominate the Tree of Life, but our understanding macroevolutionary processes generating this diversity is still limited. Habitat transitions are thought to be a key driver prokaryote diversity. However, relatively little known about how prokaryotes successfully transition and persist across environments, these might vary between biomes lineages. Here, we investigate biome specialization in natural populations focal bacterial phylum, Myxococcota, sampled range replicated soils freshwater marine sediments Cornwall (UK). By targeted deep sequencing protein-coding gene rpoB, found >2,000 unique Myxococcota lineages, with majority (77%) classified as specialists only <5% lineages distributed salt barrier. Discrete character evolution models revealed that one rarely transitioned into another biome. Instead, evolved generalism mediated specialists. State-dependent diversification variation speciation rates tree, was independent association or specialization. Our findings were robust phylogenetic uncertainty, different levels species delineation, assumed amounts unsampled resulting an incomplete phylogeny. Overall, results consistent “jack-of-all-trades” tradeoff where generalists suffer cost any individual environment, rapid niche shed light on bacteria could biomes.

Язык: Английский

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Discovery of Candidatus Nitrosomaritimum as a New Genus of Ammonia-Oxidizing Archaea Widespread in Anoxic Saltmarsh Intertidal Aquifers

Environmental Science & Technology, Год журнала: 2024, Номер 58(36), С. 16040 - 16054

Опубликована: Авг. 8, 2024

Ammonia-oxidizing archaea (AOA) are widely distributed in marine and terrestrial habitats, contributing significantly to global nitrogen carbon cycles. However, their genomic diversity, ecological niches, metabolic potentials the anoxic intertidal aquifers remain poorly understood. Here, we discovered named a novel AOA genus, Candidatus Nitrosomaritimum, from of Yancheng Wetland, showing close metagenomic abundance previously acknowledged dominant Nitrosopumilus AOA. Further construction ammonia monooxygenase-based phylogeny demonstrated widespread distribution Nitrosomaritimum estuarine-coastal niches sediment. Niche differentiation among sublineages this new genus is driven by salinity dissolved oxygen gradients. Comparative genomics revealed that has genetic capacity utilize urea possesses high-affinity phosphate transporter systems (phnCDE) for surviving phosphorus-limited conditions. Additionally, it contains putative nosZ genes encoding nitrous-oxide (N2O) reductase reducing N2O gas. Furthermore, gained first insights into archaeal phylum Hydrothermarchaeota populations residing potential hydroxylamine-detoxification mutualism with through utilizing AOA-released extracellular hydroxylamine using oxidoreductase. Together, study unravels overlooked role priorly unknown but abundant lineages newly biological transformation pollution mitigation coastal environments.

Язык: Английский

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