Abstract:
:We investigated the dynamics and diversity of heterotrophic bacteria, autotrophic and heterotrophic flagellates, and ciliates from March to July 2002 in the surface waters (0-50 m) of Lake Bourget. The heterotrophic bacteria consisted mainly of "small" cocci, but filaments (>2 microm), commonly considered to be grazing-resistant forms under increased nanoflagellate grazing, were also detected. These elongated cells mainly belonged to the Cytophaga-Flavobacterium (CF) cluster, and were most abundant during spring and early summer, when mixotrophic or heterotrophic flagellates were the main bacterial predators. The CF group strongly dominated fluorescent in situ hybridization-detected cells from March to June, whereas clear changes were observed in early summer when Beta-proteobacteria and Alpha-proteobacteria increased concomitantly with maximal protist grazing pressures. The analysis of protist community structure revealed that the flagellates consisted mainly of cryptomonad forms. The dynamics of Cryptomonas sp. and Dinobryon sp. suggested the potential importance of mixotrophs as consumers of bacteria. This point was verified by an experimental approach based on fluorescent microbeads to assess the potential grazing impact of all protist taxa in the epilimnion. From the results, three distinct periods in the functioning of the epilimnetic microbial loop were identified. In early spring, mixotrophic and heterotrophic flagellates constituted the main bacterivores, and were regulated by the availability of their resources mainly during April (phase 1). Once the "clear water phase" was established, the predation pressure of metazooplankton represented a strong top-down force on all microbial compartments. During this period only mixotrophic flagellates occasionally exerted a significant bacterivory pressure (phase 2). Finally, the early summer was characterized by the highest protozoan grazing impact and by a rapid shift in the carbon pathway transfer, with a fast change-over of the main predators contribution, i.e., mixotrophic, heterotrophic flagellates and ciliates in bacterial mortality. The high abundance of ciliates during this period was consistent with the high densities of resources (heterotrophic nanoflagellates, algae, bacteria) in deep layers containing the most chlorophyll. Bacteria, as ciliates, responded clearly to increasing phytoplankton abundance, and although bacterial grazing impact could vary largely, bacterial abundance seemed to be primarily bottom-up regulated (phase 3).
journal_name
Microb Ecoljournal_title
Microbial ecologyauthors
Comte J,Jacquet S,Viboud S,Fontvieille D,Millery A,Paolini G,Domaizon Idoi
10.1007/s00248-004-0230-4subject
Has Abstractpub_date
2006-07-01 00:00:00pages
72-89issue
1eissn
0095-3628issn
1432-184Xjournal_volume
52pub_type
杂志文章abstract::Pseudomonas fluorescens strains are used in agriculture as plant growth-promoting rhizobacteria (PGPR). Nontarget effects of released organisms should be analyzed prior to their large-scale use, and methods should be available to sensitively detect possible changes in the environments the organism is released to. Acco...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-009-9489-9
更新日期:2009-05-01 00:00:00
abstract::Growth kinetics of 2Nitrobacter strains (N.w. and L) coexisting in the same soil are studied in batch and continuous culture. Monod's parameters are estimated numerically from experimental data in the case of the batch experiment, and from steady-state equations in the case of the chemostat. In both cases, the 2 strai...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/BF02011417
更新日期:1984-06-01 00:00:00
abstract::Antimicrobial resistance (AMR) in the aquatic environment has received increasing attention in recent years, and growing eutrophication problems may contribute to AMR in aquatic ecosystems. To evaluate whether and how eutrophication affects AMR, 40 surface water samples were collected from the Minjiang River, Fujian P...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-019-01464-x
更新日期:2020-07-01 00:00:00
abstract::Aquatic ecosystems worldwide have been substantially altered by human activities, which often induce changes in multiple factors that can interact to produce complex effects. Here, we evaluated the combined effects of dissolved nutrients (nitrogen [N] and phosphorus [P]; three levels: concentration found in oligotroph...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-017-1099-3
更新日期:2018-05-01 00:00:00
abstract::Elemental iodine is produced in Japan from underground brine (fossil salt water). Carbon steel pipes in an iodine production facility at Chiba, Japan, for brine conveyance were found to corrode more rapidly than those in other facilities. The corroding activity of iodide-containing brine from the facility was examined...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-014-0438-x
更新日期:2014-10-01 00:00:00
abstract::Foliar chemistry influences leaf decomposition, but little is known about how litter chemistry affects the assemblage of bacterial communities during decomposition. Here we examined relationships between initial litter chemistry and the composition of the bacterial community in a stream ecosystem. We incubated replica...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-016-0735-7
更新日期:2016-05-01 00:00:00
abstract::The dynamics of carbon (C), nitrogen (N), and phosphorus (P), elemental ratios, and dark uptake/release of N and P in bacterial and phytoplankton size fractions were studied during summer 1992 in three lakes of contrasting food web structure and trophic status (L240, L110, L227). We wished to determine if phytoplankto...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/BF00167161
更新日期:1995-03-01 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::Faecal contamination poses health risks for the recreational users of urban estuaries. However, our understanding of the potential pathogenicity of faecal microbes in these environments is limited. To this end, a study was conducted to understand the spatial and seasonal distribution of Salmonella in water and sedimen...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-019-01419-2
更新日期:2020-02-01 00:00:00
abstract::The recovery of bdellovibrios from estuarine sediments over an annual cycle was studied. Greater numbers of the predators were recovered in sediment than in the water column. Increases in the number of bdellovibrios recovered from sediment over various periods of time suggest that multiplication of the predators occur...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/BF02012949
更新日期:1988-01-01 00:00:00
abstract::Rainforest aquatic ecosystems include complex habitats with scarce information on their unicellular eukaryote diversity and community structure. We have investigated the diversity of ciliates in freshwater and brackish environments along the Brazilian Atlantic Forest, based on the hypervariable V4 region of the 18S-rD...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-020-01612-8
更新日期:2020-10-06 00:00:00
abstract::Francisella tularensis is associated with water and waterways and infects many species of animals, insects, and protists. The mechanism Francisella utilizes to persist in the environment and in tick vectors is currently unknown. We have demonstrated for the first time that Francisella novicida, a model organism of F. ...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-009-9586-9
更新日期:2010-04-01 00:00:00
abstract::Hosts and their associated microbes are being increasingly introduced around the world, which can lead to novel host/microbe associations via new sympatries. Woodwasps (Hymenoptera: Siricidae) are able to utilize wood for its nutrients due to obligate mutualistic associations with white rot fungi in the genus Amyloste...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-017-1018-7
更新日期:2018-01-01 00:00:00
abstract::We demonstrated previously that Cr(VI) is readily reduced to oxoCr(V)-diols at the surface of Arthrobacter oxydans-a Gram-positive aerobic bacteria isolated from Columbia basalt rocks originated from a highly contaminated site in the USA. Here, we report an electron spin resonance (ESR) study of Cr(III) hydroxide form...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-008-9476-6
更新日期:2009-02-01 00:00:00
abstract::A growing body of evidence suggests that contaminated environments may harbor a greater proportion of antibiotic-resistant microorganisms than unpolluted reference sites. Here, we report the screening of 427 Escherichia coli strains isolated from 11 locations on nine streams draining the US Department of Energy's Sava...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-015-0678-4
更新日期:2016-11-01 00:00:00
abstract::The bacteria Vibrio parahaemolyticus is an important component of coastal ecosystems worldwide, and in recent years, V. parahaemolyticus has caused several cases of food-borne gastroenteritis. However, research investigating which parameters are important in regulating V. parahaemolyticus abundance in tropical areas w...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-013-0311-3
更新日期:2014-01-01 00:00:00
abstract::Heterotrophic bacteria are, in many aquatic systems, reliant on autochthonous organic carbon as their energy source. One exception is low-productive humic lakes, where allochthonous dissolved organic matter (ADOM) is the major driver. We hypothesized that bacterial production (BP) is similarly regulated in subarctic e...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-015-0714-4
更新日期:2016-05-01 00:00:00
abstract::Huanglongbing (HLB), caused by Candidatus Liberibacter asiaticus (CLas), an uncultured α-proteobacterium, is the most destructive disease of citrus trees worldwide. In previous studies, trunk injections of penicillin reduced CLas titers and HLB symptoms in citrus. However, antibiotic effects on the whole plant microbi...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-018-1302-1
更新日期:2019-08-01 00:00:00
abstract::The digestive tract of animals harbors microbiota important for the host's fitness and performance. The interaction between digestive tract bacteria and soil animal hosts is still poorly explored despite the importance of soil fauna for ecosystem processes. In this study, we investigated the interactions between the b...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-020-01656-w
更新日期:2021-01-09 00:00:00
abstract::Intraterrestrial waters harbor microbial communities being extensively studied to understand microbial processes underlying subsurface ecosystem functioning. This paper provides the results of an investigation on the microbiomes of unique, subsurface sulfidic waters associated with Upper Jurassic, Cretaceous, and Mioc...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-018-1270-5
更新日期:2019-07-01 00:00:00
abstract::At Iron Mountain, CA, there is an extreme occurrence of acid mine drainage (AMD). This is a result of past mining activity that has exposed a sulfide ore body to weathering and microbial activity. This study presents seven new oligonucleotide probes for the detection of microorganisms at this AMD site by fluorescent i...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s002480000063
更新日期:2001-02-01 00:00:00
abstract::The abundance and biomass of heterotrophic flagellates were estimated monthly in sediments of Botany Bay during March 1999-February 2000. The annual abundance and biomass were in the ranges of 0.46-4.70 x 10(5) cells/cm(3) and of 0.30-8.61 micro g C/cm(3), respectively. The majority of heterotrophic flagellates (93-10...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-002-2000-5
更新日期:2002-05-01 00:00:00
abstract::The response of microbial communities to disturbance is a major concern for microbial ecologists since potential modifications in their composition and functioning may affect ecosystems to a larger extent. Microbial ecosystems may be resistant (not affected) or may present engineering (return to initial state) or ecol...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-014-0532-0
更新日期:2015-07-01 00:00:00
abstract::The microbial biomass and community structure of eight Chinese red soils with different fertility and land use history was investigated. Two community based microbiological measurements, namely, community level physiological profiling (CLPP) using Biolog sole C source utilization tests and phospholipid fatty acid (PLF...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s002480000053
更新日期:2000-08-01 00:00:00
abstract::The River Warnow is the drinking water source for the city of Rostock. Its eutrophic status is accompanied by high amounts of bacteria, which may reach up to 24 x 10(6) cells mL(-1) as recorded during a seasonal study in 2002. Because the river is eutrophic and also heavily loaded with organic matter, this burden is a...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-005-0091-5
更新日期:2006-01-01 00:00:00
abstract::Mathematical studies for ecosystems involving 2 predators competing for a growing prey population have shown that the 2 competitors can coexist in a state of sustained oscillations for a range of values of the system parameters. For the case of 1 suspension-feeding protozoan population, recent experimental observation...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/BF02011595
更新日期:1984-03-01 00:00:00
abstract::To reveal the variation of microbial community functions during water filtration process in river sediments, which has been utilized widely in natural water treatment systems, this study investigates the influence of municipal wastewater discharge to streams on the phylotype and metabolic potential of the microbiome i...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-015-0680-x
更新日期:2016-01-01 00:00:00
abstract::In this study, we hypothesized that sympatrically grown farmed fish, i.e. fish which experience similar environmental conditions and nutritionally similar diets, would have more convergent gut microbiota. Using a "common garden" approach, we identified the core microbiota and bacterial community structure differences ...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-020-01580-z
更新日期:2021-02-01 00:00:00
abstract::XTT (3'-[1-[(phenylamino)-carbonyl]-3,4-tetrazolium]-bis(4-methoxy-6-nitro)benzenesulfonic acid hydrate), MTS (3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium, inner salt), and WST-1 (4-(3-4-iodophenyl)-2-(4-nitrophenyl)-2H-5-tetrazolio)-1,3-benzenedisulfonate) are tetrazolium ...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-004-0012-z
更新日期:2005-04-01 00:00:00
abstract::Understanding the pathogenic potential of a new pathogen strain or a known pathogen in a new locale is crucial for management of disease in both wild and farmed animals. The Ostreid herpesvirus-1 (OsHV-1), a known pathogen of early-life-stage Pacific oysters, Crassostrea gigas, has been associated with mortalities of ...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-011-9937-1
更新日期:2012-04-01 00:00:00