Distribution patterns of attached and suspended bacteria in pristine and contaminated shallow aquifers studied with an in situ sediment exposure microcosm

Griebler, Christian; Mindl, Birgit; Slezak, Doris; Geiger-Kaiser, Margot

doi:10.3354/ame028117

Cited by 149 publications

(126 citation statements)

References 58 publications

(35 reference statements)

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“…the deep sea), bacterial biomass of the monimolimnion is similar to that reported for the 100 to 1000 m depth layer (Nagata et al 2001, Tanaka & Rassoulzadegan 2004) and pristine aquifers (Griebler et al 2002), while surface bacterial abundance was similar to groundwater and noncontaminated wells (Alfreider et al 1997, Griebler et al 2002. Bacterial production in the monimolimnion is slightly higher than the values reported for the 1000 m depth horizon in the ocean, while our surface values are similar to those reported for oceanic surface waters (Hara et al 1996, Nagata et al 2000.…”

Section: Comparison Between Microbial Communities In Cave Lagoons Andsupporting

confidence: 48%

Dissecting the microbial food web: structure and function in the absence of autotrophs

Sintes¹,

Martínez-Taberner²,

Moyà³

et al. 2004

Aquat. Microb. Ecol.

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Section: Comparison Between Microbial Communities In Cave Lagoons Andsupporting

confidence: 48%

Dissecting the microbial food web: structure and function in the absence of autotrophs

Sintes¹,

Martínez-Taberner²,

Moyà³

et al. 2004

Aquat. Microb. Ecol.

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“…This calculated bacterial import is, however, most probably an overestimate. If we instead assume that the bacterial abundance in the groundwater was only 10 7 cells L Ϫ1 , which has been found at other pristine groundwater sites (Griebler et al 2002) and which does not appear to be extremely low (Griebler 2001), the hypothetical import would be 1.7-2.7 ϫ 10 14 cells per day. These figures are comparable to the import from the two different sampled inlets to Lake StorSandsjön (Table 1).…”

Section: Discussionmentioning

confidence: 99%

“…The number of suspended bacteria in pristine groundwater is variable but generally lower than in surface waters (e.g., Griebler 2001;Griebler et al 2002). If we assume that the abundance of free bacteria in groundwater flowing into Lake Stor-Sandsjön is similar to that of the inlets of the lake, i.e., 10 9 cells L Ϫ1 (Table 1), we could calculate a hypothetical inflow of bacterial cells via groundwater.…”

Section: Discussionmentioning

confidence: 99%

Influence of inlet bacteria on bacterioplankton assemblage composition in lakes of different hydraulic retention time

Lindström

Bergström

2004

Limnology & Oceanography

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The influence of inlet bacteria on the assemblage composition of bacterioplankton was investigated in two Swedish forest lakes of different hydraulic retention time. Assemblage composition of the bacteria in lakes and running waters was determined by denaturing gradient gel electrophoresis (DGGE) and sequencing of polymerase chain reaction (PCR)-amplified 16S rDNA. The amount of bacterial cells imported via the inlets in relation to bacterioplankton cells produced in the epilimnion of the lakes was also determined. In the lake with short retention time (theoretical hydraulic retention time of 0.3 yr) the lake bacterioplankton assemblage largely resembled the riverine assemblages, although the extent of similarity varied among inlets, depending on water flow. In the lake with long retention time (theoretical hydraulic retention time of 10 yr) the bacterioplankton assemblage in the lake had low similarity to the inlet assemblages. The degree of similarity between inlets and lakes was well correlated to the amount of imported cells. Thus, our data suggest that import of inlet bacteria could have a large effect on the composition of lake bacterioplankton assemblages and that hydrological factors determined the magnitude of this effect. Since short hydraulic retention times are very common in lakes in the boreal zone, input of allochthonous bacteria can be one major factor influencing bacterioplankton assemblage composition in boreal lakes.

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“…on the surfaces of mineral grains and on rock surfaces. They can further be subdivided into benthic vagile and sessile (Griebler et al 2002;Holm et al 1992;Pedersen et al 1996). Since the report of Harvey et al (1984), most researchers have concluded that attached bacteria dominate oligotrophic subsurface environments in terms of biomass and activity, and that most planktonic cells are inactive subsets of benthic organisms.…”

Section: Introduction To Microbial Life In Pristine Aquifersmentioning

confidence: 99%

Review: Microbial biocenoses in pristine aquifers and an assessment of investigative methods

2006

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The current knowledge of microbial biocenoses (communities) in pristine aquifers is presented in a review, which also discusses their relevance for questions of groundwater protection. Aquifers are heterogeneous on all scales and structured in a variety of habitats. The void spaces in many aquifers are small. The biocenoses are thus predominantly composed of microorganisms and, often, microinvertebrates. Larger voids and macroorganisms occur in karst cavities. Due to the absence of light, the biocenoses depend on chemical energy resources, which are, however, scarce in non-contaminated groundwater. The microorganisms thus show small cell sizes, low population densities and reduced activity; they developed specific strategies to survive oligotrophic conditions. The review also discusses the impact of contamination on the biocenoses, and the potential use of the biocenoses or specific organisms as indicators for groundwater quality, and the limits of this approach. Bacteria are either planktonic or attached to aquifer material, which requires both fluid and solid phase sampling. Most groundwater bacteria are viable but non-culturable. Consequently, cultivation techniques give an incomplete picture of the biocenoses, while methods from molecular microbiology provide genetic fingerprints of the entire community. Different analytical methods are available to count microorganisms, identify species, characterise microbial diversity, and measure activity.Résumé Cette revue expose l'état actuel des connaissances concernant les biocénoses microbiennes présentes dans les aquifères oligotrophes. L'impact d'une contamination sur les biocénoses est discuté, ainsi que le potentiel que Les bactéries sont planctoniques ou attachées aux matériaux de l'aquifère, ce qui demande unéchantillonnagè a la fois de l'eau et du substrat. De nombreuses méthodes sont aujourd'hui disponibles pour le comptage, l'identification et la caractérisation de la diversité, ainsi que la mesure des activités des organismes des aquifères. Comme la grande majorité des bactéries est viable mais non cultivable, les techniques de cultures actuelles ne donnent qu'une image incomplète des communautés, alors que les méthodes moléculaires développées récemment offrent la possibilité d'obtenir un profil de la communauté plus complet.Resumen Se presentauna reseña crítica del conocimiento actual de biocenosis microbiana (comunidades) en acuíferos prístinos la cual también discute su relevancia en términos de protección de aguas subterráneas. Los acuíferos son heterogéneos en todas las escalas y estructurados en una variedad de habitats. Los espacios vacíos en muchos acuíferos son pequeños. La biocenosis está por lo tanto compuesta predominantemente por microorganismos y, frecuentemente, microinvertebrados. Espacios más grandes y macroorganismos ocurren en cavidades kársticas. Debido a la ausencia de luz la biocenosis depende de recursos energéticos químicos los cuales, sin embargo, son escasos en agua subterránea no contaminada. Los microorganismos muestran...

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Distribution patterns of attached and suspended bacteria in pristine and contaminated shallow aquifers studied with an in situ sediment exposure microcosm

Cited by 149 publications

References 58 publications

Dissecting the microbial food web: structure and function in the absence of autotrophs

Dissecting the microbial food web: structure and function in the absence of autotrophs

Influence of inlet bacteria on bacterioplankton assemblage composition in lakes of different hydraulic retention time

Review: Microbial biocenoses in pristine aquifers and an assessment of investigative methods

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