Abstract:
:Microbial communities of extreme environments have often been assumed to have low species richness. We analysed 18S rRNA gene signatures in a sample collected below the chemocline of the anoxic Mariager Fjord in Denmark, and from these data we computed novel parametric and standard nonparametric estimates of protistan phylotype richness. Our results indicate unexpectedly high richness in this environment: at the 99.5% phylotype definition, our most conservative estimate was 568 phylotypes (+/-114, standard error). Phylogenetic analyses revealed that the sequences collected cover the majority of described lineages in the eukaryotic domain. Out of 384 sequences analysed, 307 were identified as protistan targets, none of which was identical to known sequences. However, based on what is known about species that are phylogenetically related to the Mariager sequences, most of the latter seem to belong to strictly or facultative anaerobe organisms. We also found signatures that together with other environmental 18S rRNA gene sequences represent environmental clades of possibly high taxonomic levels (class to kingdom level). One of these clades, consisting exclusively of sequences from anoxic sampling sites, branches at the base of the eukaryotic evolutionary tree among the earliest eukaryotic lineages. Assuming eukaryotic evolution under oxygen-depleted conditions, these sequences may represent immediate descendants of early eukaryotic ancestors.
journal_name
FEMS Microbiol Ecoljournal_title
FEMS microbiology ecologyauthors
Zuendorf A,Bunge J,Behnke A,Barger KJ,Stoeck Tdoi
10.1111/j.1574-6941.2006.00171.xsubject
Has Abstractpub_date
2006-12-01 00:00:00pages
476-91issue
3eissn
0168-6496issn
1574-6941pii
FEM171journal_volume
58pub_type
杂志文章abstract::Qualitative and quantitative changes of microbial communities in soil microcosms during bioremediation were determined throughout one year. The soil was contaminated with 0%, 2.5%, 5%, 10% (wt/wt) of petrochemical sludge containing polynuclear aromatic hydrocarbons. We analyzed the hydrocarbon concentration in the mic...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1016/j.femsec.2005.01.014
更新日期:2005-07-01 00:00:00
abstract::Recent studies revealed a high diversity of fungal endophytes in traded tree seeds, including potential plant pathogens. The factors determining richness and composition of seed mycobiomes are poorly understood, but might be an important determinant for tree health. We assessed the relative impact of host identity, si...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1093/femsec/fiaa166
更新日期:2020-09-01 00:00:00
abstract::Vibrio harveyi has been reported to enter into a viable but nonculturable (VBNC) state. Two clinical V. harveyi strains, SF1 and CW2, and the type strain, VIB295(T), were incubated in sterilized seawater at 4 degrees C. Plate counts in these strains declined to undetectable levels (<0.1 CFU mL(-1)) within 69, 67 and 6...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1111/j.1574-6941.2008.00442.x
更新日期:2008-04-01 00:00:00
abstract::Antarctic soils are known to be oligotrophic and of having low buffering capacities. It is expected that this is particularly the case for inland high-altitude regions. We hypothesized that the bedrock type and the presence of macrobiota in these soils enforce a high selective pressure on their bacterial communities. ...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1093/femsec/fiw126
更新日期:2016-09-01 00:00:00
abstract::Cultivation-independent molecular approaches were used to investigate the phylogenetic composition of Archaea and the relative abundance of phylogenetically defined groups of methanogens in the leachate of a closed municipal solid waste landfill. Cloning and phylogenetic analysis of archaeal 16S rRNA gene sequences (1...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1016/S0168-6496(03)00218-6
更新日期:2003-11-01 00:00:00
abstract::We measured growth of a phenanthrene-degrading bacterium, Arthrobacter, strain RP17, in Forbes soil, amended with 500 µg g(-1) phenanthrene using a quantitative competitive polymerase chain reaction method. The inoculum, which was not indigenous to Forbes soil, grew from 5.55x10(5) colony forming units (cfu) g(-1) to ...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1111/j.1574-6941.2000.tb00748.x
更新日期:2000-10-01 00:00:00
abstract::A total of 39 phenol- and p-cresol-degraders isolated from the river water continuously polluted with phenolic compounds of oil shale leachate were studied. Species identification by BIOLOG GN analysis revealed 21 strains of Pseudomonas fluorescens (4, 8 and 9 of biotypes A, C and G, respectively), 12 of Pseudomonas m...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1111/j.1574-6941.2000.tb00684.x
更新日期:2000-03-01 00:00:00
abstract::Antibiotic resistance exerts a metabolic cost on bacteria and presumably a fitness disadvantage in the absence of antibiotics. However, several studies have shown that bacteria can evolve to eliminate this cost. Escherichia coli can adapt to the plasmid pBR322 carrying the tetA tetracycline-resistance gene (codes for ...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1111/1574-6941.12019
更新日期:2013-03-01 00:00:00
abstract::Proteins may be an important carbon and nitrogen source to bacteria in aquatic habitats, yet knowledge on the actual utilization of this substrate by proteolytic bacteria is scarce. In this study, Pseudomonas fluorescens ON2 produced an alkaline proteinase (AprX) during growth, and there was no evidence for cell densi...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1111/j.1574-6941.2011.01285.x
更新日期:2012-04-01 00:00:00
abstract::Current strategies to protect groundwater sources from microbial contamination (e.g., wellhead protection areas) rely upon natural attenuation of microorganisms between wells or springs and potential sources of contamination and are determined using average (macroscopic) groundwater flow velocities defined by Darcy's ...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章,评审
doi:10.1016/j.femsec.2004.02.018
更新日期:2004-07-01 00:00:00
abstract::IncP-1 plasmids are known to be promiscuous, but it is not understood if they are equally well adapted to various species within their host range. Moreover, little is known about their fate in bacterial communities. We determined if the IncP-1beta plasmid pB10 was unstable in some Proteobacteria, and whether plasmid s...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1111/j.1574-6941.2006.00223.x
更新日期:2007-03-01 00:00:00
abstract::The investigated deeply buried marine sediments of the shallow shelf off New Jersey, USA, are characterized by low organic carbon content and total cell counts of < 10(7) cells per mL sediment. The qPCR data for Bacteria and Archaea were in the same orders of magnitude as the total cell counts. Archaea and Bacteria oc...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1111/1574-6941.12146
更新日期:2013-09-01 00:00:00
abstract::We have assessed the microbial ecology on the surface of Mittivakkat glacier in SE-Greenland during the exceptional high melting season in July 2012 when the so far most extreme melting rate for the Greenland Ice Sheet has been recorded. By employing a complementary and multi-disciplinary field sampling and analytical...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1111/1574-6941.12351
更新日期:2014-08-01 00:00:00
abstract::Dehalococcoides mccartyi exhibits versatile capabilities to respire halogenated compounds under anaerobic conditions. In this study, we report the assembly and annotation of the complete genome of a chloroethene dechlorinating D. mccartyi strain 11a5. Bearing a 1461 973 base-pair chromosome, strain 11a5 distinguishes ...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1093/femsec/fiw235
更新日期:2017-04-01 00:00:00
abstract::During cyanobacterial blooms, processes influencing the population dynamics of blooming species remain partially unexplained. To provide new information, we performed a high-frequency monitoring – every 2 days at six sampling points – of a Microcystis aeruginosa population blooming in a shallow lake. At each sampling ...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1111/j.1574-6941.2011.01203.x
更新日期:2012-01-01 00:00:00
abstract::Truffles are hypogeous ectomycorrhizal fungi. They belong to the genus Tuber and are currently considered a hot spot in fungal biology due to their ecological and economic relevance. Among all the species, Tuber magnatum is the most appreciated because of its special taste and aroma. The aim of this work was to set up...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1111/j.1574-6941.2009.00783.x
更新日期:2010-01-01 00:00:00
abstract::Plants may serve as reservoirs for human-associated bacteria (H-AB) in long-term space missions containing bioregenerative life support systems. The current study examined the abilities of five human-associated potential pathogens, Pseudomonas aeruginosa, Pseudomonas cepacia, Staphylococcus aureus, Streptococcus pyoge...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1016/0168-6496(96)00020-7
更新日期:1996-07-01 00:00:00
abstract::Managed agricultural ecosystems are unique systems where crops and microbes are intrinsically linked. This study focuses on discerning microbiome successional patterns across all plant organs and tests for evidence of niche differentiation along temporal and spatial axes. Soybean plants were grown in an environmental ...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1093/femsec/fiaa206
更新日期:2021-01-08 00:00:00
abstract::Knowledge of microbial communities and their inherent heterogeneity has dramatically increased with the widespread use of high-throughput sequencing technologies, and we are learning more about the ecological processes that structure microbial communities across a wide range of environments, as well as the relative sc...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1111/j.1574-6941.2012.01416.x
更新日期:2012-10-01 00:00:00
abstract::The severity of environmental conditions at Earth's frigid zones present attractive opportunities for microbial biomining due to their heightened potential as reservoirs for novel secondary metabolites. Arid soil microbiomes within the Antarctic and Arctic circles are remarkably rich in Actinobacteria and Proteobacter...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1093/femsec/fiz031
更新日期:2019-04-01 00:00:00
abstract::Land plants directly contact soil through their roots. An enormous diversity of microbes dwelling in root-associated zones, including endosphere (inside root), rhizoplane (root surface) and rhizosphere (soil surrounding the root surface), play essential roles in ecosystem functioning and plant health. Rice is a staple...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1093/femsec/fiz040
更新日期:2019-05-01 00:00:00
abstract::Photobacterium leiognathi is a facultative bioluminescent symbiont of marine animals. Strains of P. leiognathi that are merodiploid for the luminescence genes (lux-rib operon) have been previously obtained only from Japan. In contrast, strains bearing a single lux-rib operon have been obtained from all the areas sampl...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1111/j.1574-6941.2012.01353.x
更新日期:2012-08-01 00:00:00
abstract::An integrated modeling framework was developed to assess physical, biological and chemical processes in the sediment and at the sediment-water interface. Special focus is laid on the description of different functional groups of bacteria as defined according to their metabolic pathways, including fermentation, methano...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1016/S0168-6496(03)00196-X
更新日期:2003-12-01 00:00:00
abstract::Increased warming in spring and prolonged summer drought may alter soil microbial denitrification. We measured potential denitrification activity and denitrifier marker gene abundances (nirK, nirS, nosZ) in grasslands soils in three geographic regions characterized by site-specific land-use indices (LUI) after warming...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1093/femsec/fiv066
更新日期:2015-07-01 00:00:00
abstract::Microbial communities in two production waters of a low-temperature and low-salinity petroleum reservoir in Canada were examined using cultural and molecular approaches. The predominant cultivated microorganisms were homoacetogens but sulfate-reducers, acetoclastic methanogens and denitrifiers also gave significant co...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1016/j.femsec.2005.05.007
更新日期:2005-11-01 00:00:00
abstract::Kombucha, historically an Asian tea-based fermented drink, has recently become trendy in Western countries. Producers claim it bears health-enhancing properties that may come from the tea or metabolites produced by its microbiome. Despite its long history of production, microbial richness and dynamics have not been fu...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1093/femsec/fix048
更新日期:2017-05-01 00:00:00
abstract::As water is a source of nosocomial infections in hospitals, the presence of fastidious Gram-negative bacteria in water samples taken in a university hospital was investigated. Water samples were inoculated onto agar plates and into amoebal microplates for co-culture. Sixty-eight alpha proteobacteria isolates were obta...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1016/s0168-6496(00)00084-2
更新日期:2000-12-01 00:00:00
abstract::The influence of chromium on the microbial community structure was analyzed in a river system subjected to long-term chromium contamination, by plating and by sequencing 16S rRNA genes cloned from DNA extracted from the river sediments. We also analyzed the influence of chromium on the ability of the microbial communi...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1016/j.femsec.2005.02.014
更新日期:2005-09-01 00:00:00
abstract::A roundtable discussion held at the fourth International Symposium on the Environmental Dimension of Antibiotic Resistance (EDAR4) considered key issues concerning the impact on the environment of antibiotic use in agriculture and aquaculture, and emissions from antibiotic manufacturing. The critical control points fo...
journal_title:FEMS microbiology ecology
pub_type: 共识发展会议,杂志文章
doi:10.1093/femsec/fix185
更新日期:2018-03-01 00:00:00
abstract::We explored how dietary bacteria affect the life history traits and biochemical composition of Daphnia magna, using three bacteria taxa with very different lipid composition. Our objectives were to (1) examine whether and how bacteria-dominated diets affect Daphnia survival, growth, and fecundity, (2) see whether bact...
journal_title:FEMS microbiology ecology
pub_type: 杂志文章
doi:10.1111/j.1574-6941.2012.01406.x
更新日期:2012-10-01 00:00:00