Groundwater Macrocrustaceans as Natural Indicators of the Ariège Alluvial Aquifer

Dumas, Pascal; Bou, Claude; Gibert, Janine

doi:10.1002/1522-2632(200110)86:6<619::aid-iroh619>3.0.co;2-p

Cited by 36 publications

(15 citation statements)

References 25 publications

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“…Species requirements in ground waters 805 minor importance in determining stygobiotic occurrences at the regional scale. Low influence of water chemistry has also been observed by Hahn (2002), Paran et al (2005) and Dumas et al (2001), who emphasised the dominant influence of hydrogeological and geomorphological variables. A possible explanation for our result may be related, in part, to the criteria used to select study sites, specifically our choice to avoid basins with marked anthropogenic influences, as recommended in the PASCALIS sampling protocol (Malard et al, 2002).…”

Section: Environmental Gradientsmentioning

confidence: 64%

“…Moreover, these studies are of limited use for understanding regional biodiversity patterns because (i) they are not strictly focused on stygobiotic assemblages, very often comprising the entire groundwater assemblages and thus also non-obligate subterranean fauna (e.g. Strayer et al, 1997;Hunt & Stanley, 2003;Storey & Williams, 2004;Kü lkö ylü oglu & Yilmaz, 2006); (ii) most available information relates to porous and riverine aquifers (Mauclaire & Gibert, 2001;Dumas, Bou and Gibert, 2001;Hahn, 2002;Malard et al, 2003;Hunt & Stanley, 2003;Paran et al, 2005;Datry, Malard & Gibert, 2005;Hahn, 2006), more rarely to karstic systems (Barthélémy, 1984;Malard et al, 1994;Pipan, 2005;Pipan, Blejec & Brancelj, 2006), and only exceptionally to both karst and porous aquifers (Hahn & Fuchs, 2009);(iii) studies are conducted at the aquifer scale (e.g. Mauclaire & Gibert, 2001), which need not reveal biodiversity patterns at the larger regional scale; (iv) data frequently refer to pollution or other anthropogenic influences (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Relationships between environmental variables and groundwater biodiversity at the regional scale

et al. 2009

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SUMMARY1. Relationships between the assemblage structure of stygobionts (i.e. obligate groundwater species) and habitat conditions in aquifers were explored in the French Jura based on 16 environmental variables and presence ⁄ absence data on stygobiotic species. The two data sets were simultaneously collected at a total of 269 sites. 2. The study aimed to (i) identify the environmental factors determining the composition of stygobiotic assemblages at the regional scale; (ii) define the ecological preferences of the collected stygobiotic species along environmental gradients; and (iii) describe species assemblages occurring in similar habitats. These aims were pursued with a view to refine approaches to groundwater biodiversity assessment and sampling strategies. 3. A large number of stygobionts (62 species) were collected using a stratified sampling design. The measured environmental variables explained 72% of the overall variability in stygobiotic assemblage structure. Determining factors were primarily geology (pore size) and dissolved oxygen concentration, and secondarily altitude and distance of sampling sites from areas glaciated during the Pleistocene. Water chemistry and landcover variables had little influence on the composition of stygobiotic assemblages. 4. Ecological preferences of stygobiotic species were bounded along environmental gradients using Outlying Mean Index (OMI) analysis. Apart from rare species (frequency < 0.01), most stygobionts had a tolerance index >1, but residual tolerance observed in the most widespread species indicates sensitivity to other variables than those studied. 5. Biodiversity hotspots mainly occurred in highly permeable geological formations such as karst and coarse alluvial environments with well oxygenated water situated between 200 and 500 m altitude. More intensive sampling of high-altitude sites is unlikely to yield additional species, but rare species may be found at low and mid altitudes and at sites far from the Wü rm glaciers.

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Section: Environmental Gradientsmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Relationships between environmental variables and groundwater biodiversity at the regional scale

et al. 2009

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“…There are promising attempts to develop similar methods for groundwater quality monitoring (Dumas et al 2001;Hahn and Friedrich 1999;Malard et al 1996a,b;Pipan and Brancelj 2004). The low population densities and the large number of locally restricted endemic species often limit the applicability of this approach.…”

Section: Bioindicators For Groundwater Qualitymentioning

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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“…This has been suggested elsewhere (Dumas et al 2001;Hahn 2006;Dole-Olivier et al 2009a). The EC and calcium influenced microbial assemblages in both catchments, but the relative importance of these variables differed.…”

Section: Environmental Relationships With Biota Water Qualitymentioning

confidence: 99%

An inter-catchment comparison of groundwater biota in the cotton-growing region of north-western New South Wales

2013

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Abstract.Groundwater is essential to crop production in many parts of the world, and the provision of clean groundwater is dependent on healthy groundwater ecosystems. To understand better the functioning of groundwater ecosystems, it is necessary to understand how the biota responds to environmental factors, and so distinguish natural variation from human induced changes. This study compares the groundwater biota of the adjacent Gwydir and Namoi River alluvial aquifers, both in the heartland of Australia's cotton industry, and investigates the relative importance of environmental, anthropogenic, geological, and evolutionary processes on biotic distribution.Distinct differences in biotic assemblages were recorded between catchments at a community level. However, at a functional level (e.g. microbial activity, stygofauna abundances and richness) both ecosystems were similar. The distribution of biota in both catchments was influenced by similar environmental variables (e.g. geology, carbon availability, season, and land use). Broad trends in biotic distribution were evident: stygofauna responded most strongly to geological variables (reflecting habitat) and microbes to water quality and flow. Agricultural activities influenced biota in both catchments. Although possessing different taxa, the groundwater ecosystems of the two aquifers were functionally similar and responded to similar environmental conditions.

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Groundwater Macrocrustaceans as Natural Indicators of the Ariège Alluvial Aquifer

Cited by 36 publications

References 25 publications

Relationships between environmental variables and groundwater biodiversity at the regional scale

Relationships between environmental variables and groundwater biodiversity at the regional scale

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

An inter-catchment comparison of groundwater biota in the cotton-growing region of north-western New South Wales

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