A5049640216- Microbial Community Ecology and Physiology
- Peatlands and Wetlands Ecology
- Genomics and Phylogenetic Studies
- Bryophyte Studies and Records
- Climate change and permafrost
- Soil Carbon and Nitrogen Dynamics
- Environmental DNA in Biodiversity Studies
- Polar Research and Ecology
- Geology and Paleoclimatology Research
- Lichen and fungal ecology
- Protist diversity and phylogeny
- Microbial Natural Products and Biosynthesis
- Indigenous Studies and Ecology
- Microbial Metabolism and Applications
- Methane Hydrates and Related Phenomena
- Mycorrhizal Fungi and Plant Interactions
- Water Treatment and Disinfection
- Marine and coastal ecosystems
- Agriculture Sustainability and Environmental Impact
- Bacteriophages and microbial interactions
- Gene Regulatory Network Analysis
- Zoonotic diseases and public health
- Allelopathy and phytotoxic interactions
- Marine Bivalve and Aquaculture Studies
- Marine and coastal plant biology
University of New Hampshire at Manchester
2025
Louisiana Department of Natural Resources
2021-2024
University of New Hampshire
2021-2024
Cooperative Institute for Research in Environmental Sciences
2017-2022
University of Colorado Boulder
2017-2022
University of California, Davis
2013-2014
Oak Crest Institute of Science
2014
Genome-resolved environmental metagenomic sequencing has uncovered substantial previously unrecognized microbial diversity relevant for understanding the ecology and evolution of biosphere, providing a more nuanced view distribution ecological significance traits including phototrophy across diverse niches. Recently, capacity bacteriochlorophyll-based anoxygenic photosynthesis been proposed in uncultured bacterial WPS-2 phylum (recently as Candidatus Eremiobacterota) that are close...
Few studies have comprehensively investigated the temporal variability in soil microbial communities despite widespread recognition that belowground environment is dynamic. In part, this stems from challenges associated with high degree of spatial heterogeneity and because presence relic DNA (DNA dead cells or secreted extracellular DNA) may dampen signals. Here, we disentangle relationships among spatial, temporal, effects on prokaryotic fungal soils collected contrasting hillslopes...
Summary Mosses are critical components of boreal ecosystems where they typically account for a large proportion net primary productivity and harbour diverse bacterial communities that can be the major source biologically‐fixed nitrogen in these ecosystems. Despite their ecological importance, we have limited understanding how microbial vary across moss species extent to which local site conditions may influence composition communities. We used marker gene sequencing analyze associated with...
Summary Bryophytes, including the lineages of mosses, liverworts, and hornworts, are second‐largest photoautotroph group on Earth. Recent work across terrestrial ecosystems has highlighted how bryophytes retain control water, fix substantial amounts carbon (C), contribute to nitrogen (N) cycles in forests (boreal, temperate, tropical), tundra, peatlands, grasslands, deserts. Understanding changing climate affects bryophyte contributions global different is primary importance. However,...
Microbiome responses to warming may amplify or ameliorate terrestrial carbon loss and thus are a critical unknown in predicting climate outcomes. We quantified microbial response over seven years thawing permafrost peatland, using large-scale multi-omics data. integrated analyses of organisms (via taxonomy), functions metabolic pathways proteins), community organization network structure ecological assembly) deeply characterize mechanisms. This revealed unexpected comprehensive microbiome...
Mosses in high-latitude ecosystems harbor diverse bacterial taxa, including N2-fixers which are key contributors to nitrogen dynamics these systems. Yet the relative importance of moss host species, and environmental factors, structuring microbial communities their N2-fixing potential remains unclear. We studied 26 boreal tundra species across 24 sites Alaska, USA, from 61 69° N. used cultivation-independent approaches characterize variation moss-associated as a function identity site...
Nitrogen (N2 )-fixing moss microbial communities play key roles in nitrogen cycling of boreal forests. Forest type and leaf litter inputs regulate abundance, but how they control microbiomes N2 -fixation remains understudied. We examined the impacts forest broadleaf on community composition rates Hylocomium splendens Pleurozium schreberi. conducted a transplant manipulation experiment at three sites with paired paper birch (Betula neoalaskana) black spruce (Picea mariana) stands Alaska....
Abstract The rhizosphere contains a diverse group of bacteria and fungi living near plant roots whose composition function are key drivers ecosystem biogeochemical processes. Despite rich literature on communities, surprisingly few studies have examined the community structures in natural settings. We collected 513 root samples from 141 individual plants representing six species three mycorrhizal association types across four glacial drifts North Slope Alaska. Glacial ranged 11,000 to 4.5...
The inland soils found on the Antarctic continent represent one of more challenging environments for microbial life Earth. Nevertheless, harbor unique bacterial and archaeal (prokaryotic) communities able to cope with extremely cold dry conditions. These are not homogeneous, taxonomic composition functional capabilities (genomic attributes) these across environmental gradients remain largely undetermined. We analyzed prokaryotic in soil samples collected from Shackleton Glacier region...
Wastewater microbial communities are not static and can vary significantly across time space, but this variation the factors driving observed spatiotemporal often remain undetermined. We used a shotgun metagenomic approach to investigate changes in wastewater 17 locations sewer network, with samples collected from each location over 3-week period. Fecal material-derived bacteria constituted relatively small fraction of taxa found samples, highlighting importance environmental sources sewage...
Abstract Genes that remain hypothetical, uncharacterized, and unannotated comprise a substantial portion of metagenomic datasets are likely to be particularly prevalent in soils where poorly characterized taxa predominate. Documenting the prevalence, distribution, potential roles these genes unknown function is an important first step understanding their functional contributions soil communities. We identified from 50 metagenomes analyzed environmental distributions ecological associations....
Abstract Few studies have comprehensively investigated the temporal variability in soil microbial communities despite widespread recognition that belowground environment is dynamic. In part, this stems from challenges associated with high degree of spatial heterogeneity and because presence relic DNA (DNA non-living cells) may dampen signals. Here we disentangle relationships among spatial, temporal, effects on bacterial, archaeal, fungal soils collected contrasting hillslopes Colorado, USA....
Abstract Genome-resolved environmental metagenomic sequencing has uncovered substantial previously unrecognized microbial diversity relevant for understanding the ecology and evolution of biosphere, providing a more nuanced view distribution ecological significance traits including phototrophy across diverse niches. Recently, capacity bacteriochlorophyll-based anoxygenic photosynthesis been found in uncultured bacterial WPS-2 clade that are close association with boreal moss. Here, we use...
ABSTRACT Here we present the draft genome of Leucobacter sp. strain UCD-THU. The contains 3,317,267 bp in 11 scaffolds. This was isolated from a residential toilet as part an undergraduate project to sequence reference genomes microbes built environment.
Abstract Mosses are critical components of boreal ecosystems where they typically account for a large proportion net primary productivity and harbor diverse bacterial communities that can be the major source biologically-fixed nitrogen in these ecosystems. Despite their ecological importance, we have limited understanding how microbial vary across moss species extent to which local environmental conditions may influence composition communities. We used marker gene sequencing analyze...
From the aboveground vegetation to belowground microbes, terrestrial communities differ between highly divergent alpine (above treeline) and subalpine (below ecosystems. Yet, much less is known about partitioning of microbial lakes. Our goal was determine whether composition bacterioplankton high-elevation mountain lakes differed across treeline, identify key players in driving community composition, potential environmental factors that may be differences. To do so, we compared bacterial...
Abstract Background: Mosses in high latitude ecosystems harbor diverse bacterial taxa, including N 2 -fixers which are key contributors to nitrogen dynamics these systems. Yet, the relative importance of moss host species, and environmental factors, structuring microbial communities their -fixing potential remains unclear. We studied 26 boreal tundra species across 24 sites Alaska, USA from 61º 69º N. used cultivation-independent approaches characterize variation moss-associated as a...
The rhizosphere represents a diverse group of bacteria and fungi living near plant roots whose composition function are key drivers ecosystem biogeochemical processes. Most knowledge comes from agricultural or laboratory studies which lack natural characteristics, such as association with non-arbuscular mycorrhizal fungi, making it difficult to extend these findings broader systems. We used the Arctic model system, due high density ectomycorrhizal examine relative importance glacial history,...