Abstract:
:Bacteria and algae release exopolymeric substances (EPS) that perform a wide range of important functions in aquatic and terrestrial systems. In this study we measured EPS in sediments at nine littoral sites around a shallow oligotrophic basin, and tested whether the concentration and composition of EPS was related to sediment characteristics. The concentrations of both loosely bound (colloidal) and tightly bound (capsular) EPS carbohydrates ranged up to ~800 micro g glucose equiv. cm(-2) and were well within the range of concentrations reported from marine intertidal flats, where EPS play an important role in stabilizing sediments, affecting nutrient exchanges between sediments and the water column, feeding benthic invertebrates, and sequestering and increasing the transfer of contaminants to food webs. Proteins were an important component of the EPS in these littoral sediments, with protein:carbohydrate ratios of approximately 0.4. In summer, the concentrations of most EPS fractions were positively related ( P < 0.05) to the porewater and organic matter content of the sediments. Capsular EPS concentrations were lower in the fall, with a simultaneous increase in colloidal proteins but not in colloidal carbohydrates. This suggests that the carbohydrates in this colloidal EPS may be more labile than the proteins. Our results suggest that exopolymeric substances could be an important, but neglected, component of littoral sediments in lakes.
journal_name
Microb Ecoljournal_title
Microbial ecologyauthors
Hirst CN,Cyr H,Jordan IAdoi
10.1007/s00248-002-1064-6keywords:
subject
Has Abstractpub_date
2003-07-01 00:00:00pages
22-32issue
1eissn
0095-3628issn
1432-184Xjournal_volume
46pub_type
杂志文章abstract::Bacterial disease is a significant issue for larviculture of several species of shellfish, including oysters. One source of bacteria is the seawater used throughout the hatchery. In this study carried out at a commercial oyster hatchery in Tasmania, Australia, the diversity of the bacterial community and its relations...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-013-0183-6
更新日期:2013-08-01 00:00:00
abstract::Biological soil crusts (BSCs) are communities of cryptogamic organisms, occurring in arid and semiarid regions all over the world. Based on both morphological identification and genetic analyses, we established a first cyanobacterial inventory using the biphasic approach for BSCs within two major biomes of southern Af...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-013-0301-5
更新日期:2014-02-01 00:00:00
abstract::In many vertebrates, social interactions and nutrition can affect the colonization of gut symbionts across generations. In the highly social honey bee, it is unknown to what extent the hive environment and older worker individuals contribute to the generational transmission of core gut bacteria. We used high-throughpu...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-015-0716-2
更新日期:2016-05-01 00:00:00
abstract::Menez Gwen, Lucky Strike and Rainbow are the three most visited and well-known deep-sea hydrothermal vent fields in the Azores region, located in the Mid-Atlantic Ridge. Their distinct geological and ecological features allow them to support a diversity of vent communities, which are largely dependent on Bacteria and ...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-017-0943-9
更新日期:2017-08-01 00:00:00
abstract::The use of microbial inoculants containing plant growth-promoting rhizobacteria as a promoter of plant fitness and health is becoming increasingly popular in agriculture. However, whether and how these bacteria affect indigenous bacterial communities in field conditions is sparsely explored. We studied the effects of ...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-018-1160-x
更新日期:2018-10-01 00:00:00
abstract::Deep sequencing of prokaryotic 16S rDNA regularly reveals thousands of microbial species thriving in many common habitats. It is still unknown how this huge microbial diversity, including many potentially competing organisms, may persist at a single site. One of plausible hypotheses is that a large number of spatially...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-016-0760-6
更新日期:2016-07-01 00:00:00
abstract::The haptophyte Prymnesium parvum has lytic properties, and it affects coexisting phytoplankton species through allelopathy. We studied the effect of P. parvum allelochemicals on the lysis of the nontoxic and nonaxenic cryptomonad Rhodomonas salina and the consequent release of dissolved organic carbon (DOC). Changes i...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-006-9188-8
更新日期:2007-07-01 00:00:00
abstract::Heterotrophic bacteria in sea ice play a key role in carbon cycling, but little is known about the predominant players at the phylogenetic level. In a study of both algal bands and clear ice habitats within summertime Arctic pack ice from the Chukchi Sea, we determined the abundance of total bacteria and actively resp...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-001-1026-4
更新日期:2002-04-01 00:00:00
abstract::Rhizospheric soil samples were taken from Puna native grasses along an altitudinal gradient. Biodiversity of arbuscular mycorrhizal fungi (AMF) and associated bacteria was analyzed considering altitude and grasses photosynthetic pathways (metabolic type C3, C4). Cultivation-dependent approaches were applied to obtain ...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-007-9313-3
更新日期:2008-05-01 00:00:00
abstract::The fungal species involved in the decomposition of needle litter and their response to intraspecific genetic variation of trees are poorly known. First, we compared the needle decomposition and fungal decomposers underneath eight different Norway spruce clones in situ. This experiment revealed 60-70% loss of needle m...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-007-9326-y
更新日期:2008-07-01 00:00:00
abstract::Microbial biodiversity provides an increasingly important source of medically and industrially useful compounds. We have isolated 14 actinomycete species from a collection of approximately 300 plant stem samples from the upper Amazonian rainforest in Peru. All of the cultured isolates produce substances with inhibitor...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-009-9494-z
更新日期:2009-08-01 00:00:00
abstract::The diversity and composition of soil bacterial communities in three topographic sites (summit, foot slope, and lakeshore) from subtropical montane forest ecosystem in Taiwan were examined by using 16S rRNA gene clone library analysis. This locality is temperate, perhumid, and has low soil acidity (pH < 4), which is a...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-009-9574-0
更新日期:2010-02-01 00:00:00
abstract::Bluegill (Lepomis macrochirus) in Lake Biwa, Japan, feed on benthic invertebrates (benthivorous type), aquatic plants (herbivorous type), and zooplankton (planktivorous type). To evaluate the effect of food on intestinal bacterial microbiota, we characterized and compared the intestinal microbiota of these three types...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-006-9018-z
更新日期:2006-04-01 00:00:00
abstract::Recent and substantial yield losses of Styrian oil pumpkin (Cucurbita pepo L. subsp. pepo var. styriaca Greb.) are primarily caused by the ascomycetous fungus Didymella bryoniae but bacterial pathogens are frequently involved as well. The diversity of endophytic microbial communities from seeds (spermosphere), roots (...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-011-9942-4
更新日期:2012-02-01 00:00:00
abstract::Understanding the dynamics of plant-associated microbial communities within agriculture is well documented. However, the ecological processes that assemble the plant microbiome are not well understood. This study elucidates the relative dominance of assembly processes across plant compartments (root, stem, and leaves)...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-021-01688-w
更新日期:2021-01-18 00:00:00
abstract::An enrichment culture method is described for quantifying the activity of hydrocarbon oxidizing bacteria in water and sediments. Application of the procedure indicated that the hydrocarbon oxidizing potential of environmental samples reflects the hydrocarbon burden of the area, the ability of the microflora to utilize...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/BF02010379
更新日期:1975-03-01 00:00:00
abstract::Soil microorganisms are sensitive to environmental perturbations such that changes in microbial community structure and function can provide early signs of anthropogenic disturbances and even predict restoration success. We evaluated the bacterial functional diversity of un-mined and three chronosequence sites at vari...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-009-9621-x
更新日期:2010-05-01 00:00:00
abstract::The predatory activity of bdellovibrios is affected by various environmental pollutants such as detergents, heavy metals, and pesticides. This was shown in a two-membered system ofBdellovibrio andPhotobacterium, in which the effect of the predator on the bioluminescence of the prey indicated the activity of the former...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/BF02032492
更新日期:1981-06-01 00:00:00
abstract::More than 50% of all anthropogenic N2O emissions come from the soil. Drained Histosols that are used for agricultural purposes are particularly potent sources of denitrification due to higher stocks of organic matter and fertiliser application. However, conditions that favour denitrification can vary considerably acro...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-017-0991-1
更新日期:2017-11-01 00:00:00
abstract::We examined the abundance of viruses on microorganisms in activated sludge and the dynamics of their community structure. Direct counting with epifluorescence microscopy and pulsed-field gel electrophoresis (PFGE) were applied to 20 samples from 14 full-scale wastewater treatment plants (wwtps) treating municipal, ind...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-006-9150-9
更新日期:2007-01-01 00:00:00
abstract::Energy redistribution between growth and maintenance in salt-stressed cells is especially important for bacteria living in estuarine environments. In this study, Gram-negative bacterium Vibrio sp. DSM14379, isolated from the estuarine waters of the northern Adriatic Sea, was grown aerobically in a peptone-yeast extrac...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-011-9870-3
更新日期:2011-07-01 00:00:00
abstract::Different nominal molecular weight (nMW) fractions of DOC from a southeastern blackwater river were concentrated by ultrafiltration and added to sieved river water to assess each fraction's ability to stimulate bacterial growth. Bacterial growth was measured using change in bacterial biomass from direct counts and usi...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/BF02014960
更新日期:1987-01-01 00:00:00
abstract::Pathogenic and protective roles have been attributed to gut commensal microbiota (GCM) in gastrointestinal inflammatory and functional disorders. We have shown that the adaptation to a new environment implies specific changes in the composition of GCM. Here we assessed if environment-related adaptive changes of GCM mo...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-013-0241-0
更新日期:2013-07-01 00:00:00
abstract::Bacterial degradation is an ecosystem service that offers a promising method for the remediation of contaminated soils. To assess the dynamics and efficiency of bacterial degradation, reliable microbial simulation models, along with the relevant processes, are required. We present an approach aimed at improving reliab...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-011-9927-3
更新日期:2012-02-01 00:00:00
abstract::The impact of acid rock drainage (ARD) and eutrophication on microbial communities in stream sediments above and below an abandoned mine site in the Adelaide Hills, South Australia, was quantified by PLFA analysis. Multivariate analysis of water quality parameters, including anions, soluble heavy metals, pH, and condu...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-003-1045-4
更新日期:2004-10-01 00:00:00
abstract::A strain-specific immunofluorescence assay for enumeration of a marine denitrifying bacterium was developed and applied in the marine environment. The polyclonal antiserum for Pseudomonas stutzeri (ATCC 14405) did not react with other pseudomonads, other heterotrophs, or autotrophic nitrifying strains. The abundance o...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/BF00171890
更新日期:1993-05-01 00:00:00
abstract::The community composition of arbuscular mycorrhizal fungi (AMF) was analyzed in roots of Gypsophila struthium growing in gypsum soils under semiarid conditions. In order to investigate the effect of plant community degradation on the AMF biodiversity at the single species level, on the basis of the plant community com...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-008-9438-z
更新日期:2009-05-01 00:00:00
abstract::Fungi have been only rarely isolated from glacial ice in extremely cold polar regions and were in these cases considered as random, long-term preserved Aeolian deposits. Fungal presence has so far not been investigated in polar subglacial ice, a recently discovered extreme habitat reported to be inhabited exclusively ...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-006-9086-0
更新日期:2006-08-01 00:00:00
abstract::Five vessels, connected in series, were used for a continuous flow system to model carbon flow in anaerobic microbial communities. Two such 5-vessel systems were constructed, the inflows containing 10 mM sulfate and either 10 mM glucose or benzoate. Dilution was slow (D=0.0018 h(-1) for the whole system).Analyses of d...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/BF02097736
更新日期:1983-10-01 00:00:00
abstract::Nasal swabs of 100 healthy dogs were obtained in 2011 in Tunisia and tested for Staphylococcus pseudintermedius recovery. Antimicrobial resistance profile and virulence gene content were determined. Multilocus-sequence-typing (MLST) and SmaI-pulsed-field gel electrophoresis (PFGE) were investigated. S. pseudintermediu...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-013-0243-y
更新日期:2013-08-01 00:00:00