A5016682261- Microbial Community Ecology and Physiology
- Polar Research and Ecology
- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Genomics and Phylogenetic Studies
- Protist diversity and phylogeny
- Gut microbiota and health
- Climate change and permafrost
- Methane Hydrates and Related Phenomena
- Hydrocarbon exploration and reservoir analysis
- Atmospheric and Environmental Gas Dynamics
- Geochemistry and Geologic Mapping
- Soil Carbon and Nitrogen Dynamics
- Marine and coastal ecosystems
- Soil and Water Nutrient Dynamics
- Paleontology and Stratigraphy of Fossils
- Marine Biology and Ecology Research
- Metabolomics and Mass Spectrometry Studies
- Insect symbiosis and bacterial influences
- Environmental DNA in Biodiversity Studies
- Planetary Science and Exploration
- Isotope Analysis in Ecology
- Indigenous Studies and Ecology
- Coral and Marine Ecosystems Studies
- Wastewater Treatment and Nitrogen Removal
University of New Mexico
2015-2024
Montana State University
2016
Miami University
2016
Lamont-Doherty Earth Observatory
2016
Unité Matériaux et Transformations
2016
ABSTRACT Microbial communities in extreme environments often have low diversity and specialized physiologies suggesting a limited resistance to change. The McMurdo Dry Valleys (MDV) are microbially dominated, ecosystem currently undergoing climate change-induced disturbances, including the melting of massive buried ice, cutting through permafrost by streams, warming events. These processes increasing moisture across landscape, altering conditions for soil mobilizing nutrients salts...
Historically neglected by microbial ecologists, soil viruses are now thought to be critical global biogeochemical cycles. However, our understanding of their distribution, activities and interactions with the microbiome remains limited. Here we present Global Soil Virus Atlas, a comprehensive dataset compiled from 2,953 previously sequenced metagenomes composed 616,935 uncultivated viral genomes 38,508 unique operational taxonomic units. Rarefaction curves Atlas indicate that most diversity...
Understanding controls over the distribution of soil bacteria is a fundamental step toward describing ecosystems, understanding their functional capabilities, and predicting responses to environmental change. This study investigated on biomass, species richness, community structure composition bacterial communities in McMurdo Dry Valleys, Antarctica, at local regional scales. The goals were describe relationships between abiotic characteristics this unique, microbially dominated environment,...
The diversity and distribution of a bacterial community from Coffee Pots Hot Spring, thermal spring in Yellowstone National Park with temperature range 39.3 to 74.1 degrees C pH 5.75 6.91, were investigated by sequencing cloned PCR products quantitative (qPCR) 16S rRNA metabolic genes. was inhabited three Aquificae genera--Thermocrinis, Hydrogenobaculum, Sulfurihydrogenibium--and members the Alpha-, Beta-, Gammaproteobacteria, Firmicutes, Acidobacteria, Deinococcus-Thermus, candidate...
The origin of eukaryotes represents an enigmatic puzzle, which is still lacking a number essential pieces. Whereas it currently accepted that the process eukaryogenesis involved interplay between host cell and alphaproteobacterial endosymbiont, we lack detailed information regarding identity nature these players. A studies have provided increasing support for emergence eukaryotic from within archaeal domain life, displaying specific affiliation with TACK superphylum. Recent shown genomic...
The Aquificales are thermophilic microorganisms that inhabit hydrothermal systems worldwide and considered one of the earliest lineages domain Bacteria. We analyzed metagenome sequence obtained from six thermal "filamentous streamer" communities (∼40 Mbp per site), which targeted three different groups found in Yellowstone National Park (YNP). Unassembled PCR-amplified 16S rRNA gene libraries revealed acidic, sulfidic sites were dominated by Hydrogenobaculum (Aquificaceae) populations,...
The causes of biodiversity patterns are controversial and elusive due to complex environmental variation, covarying changes in communities, lack baseline null theories differentiate straightforward from more mechanisms. To address these limitations, we developed general diversity theory integrating metabolic principles with niche-based community assembly. We evaluated this by investigating the distribution soil bacteria taxa across four orders magnitude variation spatial scale on an...
The intestinal microbiota of animals play an important role in their energy metabolism and resistance to pathogens, thus maintenance environment. We surveyed the three species Planorbidae (Gastropoda: Pulmonata). Cultivation-independent molecular methods were used investigate community composition bacteria from individual snails: Biomphalaria pfeifferi (Africa), two Bulinus africanus (Africa) Helisoma duryi (North America). PCR amplification sequencing 612 bacterial 16S rRNA genes yielded...
The soils of the McMurdo Dry Valleys, Antarctica are an extreme polar desert, inhabited exclusively by microscopic taxa. This region is on threshold anticipated climate change, with glacial melt, permafrost thaw, and melting massive buried ice increasing liquid water availability mobilizing soil nutrients. Experimental organic matter (OM) amendments were applied to investigate how these change effects may impact communities. To identify active taxa their functions, total community RNA...
Microbial consortia dominate glacial meltwater streams from polar regions, including the McMurdo Dry Valleys (MDV), where they thrive under physiologically stressful conditions. In this study, we examined microbial mat types and sediments found in 12 hydrologically diverse to describe community diversity composition within across sites. Sequencing of 16S rRNA gene 129 samples revealed ∼24 000 operational taxonomic units (<97% DNA similarity), making most biodiverse habitat MDV. Principal...
Intestinal microbiota perform many functions for their host, but among the most important is role in metabolism, especially conversion of recalcitrant biomass that host unable to digest into bioavailable compounds. Most studies have focused on assistance gut provide metabolism carbohydrates, however, amino acid poorly understood. We conducted an experiment Mus musculus using 16S rRNA gene sequencing and carbon isotope analysis essential acids (AA ESS ) quantify community composition...
Thermal spring ecosystems are a valuable resource for the discovery of novel hyperthermophilic Bacteria and Archaea, harbor deeply-branching lineages that provide insight regarding nature early microbial life. We characterized bacterial populations in two circumneutral (pH ~ 8) Yellowstone National Park thermal (T 80 oC) filamentous 'streamer' communities using random metagenomic DNA sequence to investigate metabolic potential these populations. Four de novo assemblies representing three...
Abstract Aquatic ecosystems - lakes, ponds and streams are hotspots of biodiversity in the cold arid environment Continental Antarctica. Environmental change is expected to increasingly alter Antarctic aquatic modify physical characteristics interactions within habitats that they support. Here, we describe biological features peripheral ‘moat’ a closed-basin lake. These moats mediate connectivity amongst streams, lake soils. We highlight cyclical moat transition from frozen winter state an...
Summary It has been suggested that the distribution of microorganisms should be cosmopolitan because their enormous capacity for dispersal. However, recent studies have revealed geographically isolated microbial populations do exist. Geographic distance as a barrier to dispersal is most often invoked explain these distributions. Here we show unique and diverse sequences bacterial genus Sulfurihydrogenibium exist in Yellowstone thermal springs, indicating sites are isolated. Although there...
Edaphic factors such as pH, organic matter, and salinity are often the most significant drivers of diversity patterns in soil bacterial communities. Desert ecosystems particular model locations for examining relationships food web complexity is low environment biogeochemically heterogeneous. Here, we present findings from a 16S rRNA gene sequencing approach used to observe differences community composition among three divergent habitats McMurdo Dry Valleys, Antarctica. Results show that...
Different reproductive strategies and the transition to asexuality can be associated with microbial symbionts. Whether such a link exists within mollusks has never been evaluated. We took first steps towards addressing this possibility by performing pyrosequencing of bacterial 16S rRNA genes Potamopyrgus antipodarum, New Zealand freshwater snail. A diverse set 60 tissue collections from P. antipodarum that were genetically geographically distinct either obligately sexual or asexual included,...