Abstract:
:Nitrogen (N) deposition affects myriad aspects of terrestrial ecosystem structure and function, and microbial communities may be particularly sensitive to anthropogenic N inputs. However, our understanding of N deposition effects on microbial communities is far from complete, especially for drylands where data are comparatively rare. To address the need for an improved understanding of dryland biological responses to N deposition, we conducted a two-year fertilization experiment in a semiarid grassland on the Colorado Plateau in the southwestern United States. We evaluated effects of varied levels of N inputs on archaeal, bacterial, fungal and chlorophyte community composition within three microhabitats: biological soil crusts (biocrusts), soil below biocrusts, and the plant rhizosphere. Surprisingly, N addition did not affect the community composition or diversity of any of these microbial groups; however, microbial community composition varied significantly among sampling microhabitats. Further, while plant richness, diversity, and cover showed no response to N addition, there were strong linkages between plant properties and microbial community structure. Overall, these findings highlight the potential for some dryland communities to have limited biotic ability to retain augmented N inputs, possibly leading to large N losses to the atmosphere and to aquatic systems.
journal_name
Environ Microbioljournal_title
Environmental microbiologyauthors
McHugh TA,Morrissey EM,Mueller RC,Gallegos-Graves V,Kuske CR,Reed SCdoi
10.1111/1462-2920.13678subject
Has Abstractpub_date
2017-04-01 00:00:00pages
1600-1611issue
4eissn
1462-2912issn
1462-2920journal_volume
19pub_type
杂志文章abstract::The marine alphaproteobacterium Roseovarius nubinhibens ISM can produce the gas dimethyl sulfide (DMS) from dimethylsulfoniopropionate (DMSP), a widespread secondary metabolite that occurs in many phytoplankton. Roseovarius possesses a novel gene, termed dddP, which when cloned, confers on Escherichia coli the ability...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2009.01864.x
更新日期:2009-06-01 00:00:00
abstract::Many plant-associated fungi host endosymbiotic endobacteria with reduced genomes. While endobacteria play important roles in these tri-partite plant-fungal-endobacterial systems, the active physiology of fungal endobacteria has not been characterized extensively by systems biology approaches. Here, we use integrated p...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.13605
更新日期:2017-03-01 00:00:00
abstract::Enzymes of the dimethyl sulfoxide reductase (DMSOR) family catalyse two-electron redox reactions pivotal to the dissimilatory metabolism of a variety of organic and inorganic compounds. The draft genome of the obligately anaerobic bacterium Desulfuribacillus stibiiarsenatis MLFW-2T contains 14 genes that are predicted...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.14503
更新日期:2019-02-01 00:00:00
abstract::There are a multitude of resistance strategies that microbes can apply to avoid inhibition by antimicrobials. One of these strategies is the enzymatic modification of the antibiotic, in a process generally termed inactivation. Furthermore, some microorganisms may not be limited to the mere inactivation of the antimicr...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.15018
更新日期:2020-07-01 00:00:00
abstract::Hydrogen (H2 ) is enriched in hot springs and can support microbial primary production. Using a series of geochemical proxies, a model to describe variable H2 concentrations in Yellowstone National Park (YNP) hot springs is presented. Interaction between water and crustal iron minerals yields H2 that partition into th...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.14730
更新日期:2019-10-01 00:00:00
abstract::Toxin-antitoxin (TA) systems are small genetic modules usually consisting of two elements-a toxin and an antitoxin. The abundance of TA systems among various bacterial strains may indicate an important evolutionary role. Pseudomonas aeruginosa, which can be found in a variety of niches in nature, is an opportunistic p...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.15102
更新日期:2020-12-01 00:00:00
abstract::We designed and tested a set of specific primers for specific PCR amplification of the biotin carboxylase subunit gene (accC) of the Acetyl CoA carboxylase (ACCase) enzyme. The primer set yielded a PCR product of c. 460 bp that was suitable for denaturing gradient gel electrophoresis (DGGE) fingerprinting followed by ...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2008.01677.x
更新日期:2008-10-01 00:00:00
abstract::Arbuscular mycorrhizal (AM) fungi can improve iron (Fe) acquisition of their host plants. Here, we report a characterization of two components of the high-affinity reductive Fe uptake system of Rhizophagus irregularis, the ferric reductase (RiFRE1) and the high affinity Fe permeases (RiFTR1-2). In the extraradical myc...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.14121
更新日期:2018-05-01 00:00:00
abstract::The marine gamma-Proteobacterium Alcanivorax borkumensis is highly specialized in the assimilation of aliphatic hydrocarbons, and makes up a large part of the biomass in oil-polluted marine environments. In addition to the previously identified alkane hydroxylase AlkB1, a second alkane hydroxylase (AlkB2) showing 65% ...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2004.00567.x
更新日期:2004-03-01 00:00:00
abstract::Model denitrifiers convert NO3- to N2 , but it appears that a significant fraction of natural populations are truncated, conducting only one or two steps of the pathway. To better understand the diversity of partial denitrifiers in soil and whether discrepancies arise between the presence of known N-oxide reductase ge...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.13250
更新日期:2017-06-01 00:00:00
abstract::Microorganisms regulate the composition of their membranes in response to environmental cues. Many Archaea maintain the fluidity and permeability of their membranes by adjusting the number of cyclic moieties within the cores of their glycerol dibiphytanyl glycerol tetraether (GDGT) lipids. Cyclized GDGTs increase memb...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.14851
更新日期:2020-01-01 00:00:00
abstract::The complex ecology of free-living amoebae (FLA) and their role in spreading pathogenic microorganisms through water systems have recently raised considerable interest. In this study, we investigated the presence of FLA and amoebae-resisting bacteria (ARB) at various stages of a drinking water plant fed with river wat...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2008.01693.x
更新日期:2008-10-01 00:00:00
abstract::A companion study indicated that approximately 30% of cultivable soil bacteria may contain inducible prophage; however, the degree to which this cultivation-based estimate applies to autochthonous communities of soil bacteria is unknown. To estimate the prevalence of lysogeny within soil bacterial communities, inducti...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2007.01374.x
更新日期:2007-10-01 00:00:00
abstract::Soluble manganese in the intermediate +III oxidation state (Mn3+ ) is a newly identified oxidant in anoxic environments, whereas acetate is a naturally abundant substrate that fuels microbial activity. Microbial populations coupling anaerobic acetate oxidation to Mn3+ reduction, however, have yet to be identified. We ...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.13829
更新日期:2017-09-01 00:00:00
abstract::Marine Group II archaea are widely distributed in global oceans and dominate the total archaeal community within the upper euphotic zone of temperate waters. However, factors controlling the distribution of MGII are poorly delineated and the physiology and ecological functions of these still-uncultured organisms remai...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.14004
更新日期:2018-02-01 00:00:00
abstract::Thin, vertically structured topsoil communities that become ecologically important in arid regions (biological soil crusts or BSCs) are responsible for much of the nitrogen inputs into pristine arid lands. We studied N(2) fixation and ammonium oxidation (AO) at subcentimetre resolution within BSCs from the Colorado Pl...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2004.00649.x
更新日期:2005-01-01 00:00:00
abstract::The O-antigen is a highly diverse structure expressed on the outer surface of Gram-negative bacteria. The products responsible for O-antigen synthesis are encoded in the wbe region, which exhibits extensive genetic diversity. While heterogeneous O-antigens are observed within Vibrio species, characterization of these ...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2010.02274.x
更新日期:2010-11-01 00:00:00
abstract::Pathogenic bacteria associated with freshwater ecosystems can pose significant health risks particularly where recreational water use is popular. Common water quality assessments involve quantifying indicator Escherichia coli within the water column but neglect to consider physical and geochemical factors and contribu...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.14860
更新日期:2020-02-01 00:00:00
abstract::Pseudomonas aeruginosa is a Gram-negative opportunistic pathogen that infects immunocompromised patients and trauma victims and causes fatal lung infections in people with cystic fibrosis. This microorganism produces a number of virulence factors, one of which is lipopolysaccharide (LPS), which has been shown to media...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1046/j.1462-2920.2002.00288.x
更新日期:2002-12-01 00:00:00
abstract::Agricultural practices, such as mineral nitrogen fertilization, have an impact on the soil's ability to oxidize methane, but little is known about the shifts in the methanotrophic community composition associated with these practices. Therefore, the long-term effect of both mineral (NH4NO3) and organic (manure and GFT...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1046/j.1462-2920.2003.00477.x
更新日期:2003-10-01 00:00:00
abstract::To determine if different algal viruses (Phycodnaviridae) share common patterns of seasonal abundance, quantitative PCR methods were developed and applied to monitor the abundances of three different viruses in Lake Ontario, Canada over 13 months. Throughout the year, the abundances of two different phycodnavirus polB...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2009.01988.x
更新日期:2009-10-01 00:00:00
abstract::The distribution and the metabolic pathways of bacteria degrading steroid compounds released by eukaryotic organisms were investigated using the bile salt cholate as model substrate. Cholate-degrading bacteria could be readily isolated from freshwater environments. All isolated strains transiently released steroid deg...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.12407
更新日期:2014-05-01 00:00:00
abstract::Several diazotrophic species of Azoarcus spp. occur as endophytes in the pioneer plant Kallar grass. The purpose of this study was to screen Asian wild rice and cultivated Oryza sativa varieties for natural association with these endophytes. Populations of culturable diazotrophs in surface-sterilized roots were charac...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1046/j.1462-2920.2000.00078.x
更新日期:2000-04-01 00:00:00
abstract::Mercury (Hg) is a highly toxic and widely distributed heavy metal, which some Bacteria and Archaea detoxify by the reduction of ionic Hg (Hg[II]) to the elemental volatile form, Hg(0). This activity is specified by the mer operon. The mer operon of the deeply branching thermophile Thermus thermophilus HB27 encodes for...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.14953
更新日期:2020-04-01 00:00:00
abstract::Methylotrophy is a metabolic capability possessed by microorganisms that allows them to build biomass and to obtain energy from organic substrates containing no carbon-carbon bonds (C1 compounds, such as methane, methanol, etc.). This phenomenon in microbial physiology has been a subject of study for over 100 years, e...
journal_title:Environmental microbiology
pub_type: 杂志文章,评审
doi:10.1111/j.1462-2920.2011.02464.x
更新日期:2011-10-01 00:00:00
abstract::Assessing the extent of parasite diversity requires the application of appropriate molecular tools, especially given the growing evidence of multiple parasite co-occurrence. Here, we compared the performance of a next-generation sequencing technology (Ion PGM ™ System) in 12 Bombus terrestris specimens that were PCR-i...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.15336
更新日期:2021-01-01 00:00:00
abstract::Arsenic (As) is the most common toxic element in the environment, ranking first on the Superfund List of Hazardous Substances. Microbial redox transformations are the principal drivers of As chemical speciation, which in turn dictates As mobility and toxicity. Consequently, in order to manage or remediate environmenta...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2011.02672.x
更新日期:2012-07-01 00:00:00
abstract::Our lower gastrointestinal tract plays host to a vast consortium of microbes, known as the human gut microbiota (HGM). The HGM thrives on a complex and diverse range of glycan structures from both dietary and host sources, the breakdown of which requires the concerted action of cohorts of carbohydrate-active enzymes (...
journal_title:Environmental microbiology
pub_type: 杂志文章,评审
doi:10.1111/1462-2920.15317
更新日期:2021-01-01 00:00:00
abstract::Selection of suitable genotypes from diverse seed banks may help phytoplankton populations to cope with environmental changes. This study examines whether the high genotypic diversity found in the Baltic cyst pool of the toxic dinoflagellate Alexandrium ostenfeldii is coupled to phenotypic variability that could aid s...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.13070
更新日期:2016-02-01 00:00:00
abstract::Bacterial degradation of polycyclic aromatic hydrocarbons (PAHs), ubiquitous contaminants from oil and coal, is typically limited by poor accessibility of the contaminant to the bacteria. In order to measure PAH availability in complex systems, we designed a number of diffusion-based assays with a double-tagged bacter...
journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/j.1462-2920.2009.01952.x
更新日期:2009-09-01 00:00:00