Ecofunctional enzymes of microbial communities in ground water

Fliermans, C.B.; Franck, M.M.; Hazen, Terry C.; Gorden, Robert W.

doi:10.1111/j.1574-6976.1997.tb00323.x

Cited by 18 publications

(6 citation statements)

References 17 publications

(13 reference statements)

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“…Microbial community was assessed using Biolog Ecoplates (Biolog Inc., Hayward, CA, USA), which have been used elsewhere to show changes in microbial functional diversity in aquatic environments (e.g., Fliermans et al, 1997; Lee et al, 2010). The method measures microbial activity through carbon utilization (Preston‐Mafham et al, 2002).…”

Section: Methodsmentioning

confidence: 99%

Groundwater Ecosystems Vary with Land Use across a Mixed Agricultural Landscape

et al. 2013

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Changes in surface land use may threaten groundwater quality and ecosystem integrity, particularly in shallow aquifers where links between groundwater and surface activities are most intimate. In this study we examine the response of groundwater ecosystem to agricultural land uses in the shallow alluvial aquifer of the Gwydir River valley, New South Wales, Australia. We compared groundwater quality and microbial and stygofauna assemblages among sites under irrigated cropping, non-irrigated cropping and grazing land uses. Stygofauna abundance and richness was greatest at irrigated sites, with the composition of the assemblage suggestive of disturbance. Microbial assemblages and water quality also varied with land use. Our study demonstrates significant differences in the composition of groundwater ecosystems in areas with different surface land use, and highlights the utility of groundwater biota for biomonitoring, particularly in agricultural landscapes.

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Section: Methodsmentioning

confidence: 99%

Groundwater Ecosystems Vary with Land Use across a Mixed Agricultural Landscape

et al. 2013

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“…The Biolog TM Ecoplates were inoculated with 150 μL of the sample/well and incubated in the dark at 20°C (Fliermans et al 1997). Color development was measured at 590 nm after 6 d of incubation.…”

Section: Microbiotamentioning

confidence: 99%

Habitat, water quality, seasonality, or site? Identifying environmental correlates of the distribution of groundwater biota

Korbel

Hose

2015

Freshwater Science

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The distribution of biota in aquatic ecosystems, including aquifers, is collectively influenced by habitat structure, water quality, seasonality, and local variations in environmental conditions. However, little is known about the nature and relative influences of such factors in groundwater ecosystems. Our aims were to identify the key environmental variables influencing the distribution of biota within the Gwydir River alluvial aquifer in northwestern New South Wales, Australia, and to consider the relative importance of environmental variables, in terms of habitat structure, water quality, seasonality, and site attributes, to both microbial and invertebrate (stygofauna) assemblages. Stygofauna distribution was primarily influenced by habitat variables (predominantly sediment structure) followed by site variables (abundance of trees), with water quality and seasonality having relatively little influence. These results indicate that it is the aquifer conditions relating to habitat structure, water flow, and the supply of organic matter that are most important for determining stygofauna distribution. Microbial assemblage structure was not strongly correlated with habitat variables, possibly because habitat restraints do not exist because of their smaller size. Instead, seasonality and water-quality variables had the greatest influence on microbial assemblages. Microbes might respond to seasonal (particularly rainfall induced) changes in water quality more quickly than do stygofauna, which may explain the relatively greater importance of seasonality and water quality to microbial assemblages. Given that stygofauna are most influenced by habitat and site variables, and microbial assemblages are most influenced by seasonality and water quality, disturbance to any of these factors may threaten the stability and integrity of the groundwater ecosystem.

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“…So called community-level physiological profiling (e.g. Biolog TM Ecoplates) has been used to successfully indicate differences between polluted and non-polluted groundwater samples (Fliermans et al, 1997;Röling et al, 2000;de Lipthay et al, 2004).…”

Section: Ecosystem Condition Indicatorsmentioning

confidence: 99%

A tiered framework for assessing groundwater ecosystem health

Korbel

Hose

2010

Hydrobiologia

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The notion of ecosystem health has been widely adopted in environmental policy, particularly in the management of river systems. Despite this, even a notional understanding of ecosystem health and its assessment in connected aquifer ecosystems remains elusive. In this article, we propose a definition and provide a tiered framework for the assessment of ecosystem health in groundwater. From the literature we identify general attributes of a healthy groundwater ecosystem and from these develop primary (Tier 1) indicators of health. Where Tier 1 benchmarks are exceeded or more detailed assessment is required, we discuss a range of indicators (Tier 2) that may together generate a multimetric index of groundwater health. Our case study using samples from an alluvial aquifer in north-western New South Wales, Australia, demonstrates the utility of both tiers of the framework, and the ability of the approach to separate disturbed and undisturbed sites. The process of multimetric development is simple and our Tier 2 benchmarks determined from limited data. Nevertheless, our framework will be applicable and readily adaptable to site-specific contexts.

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Ecofunctional enzymes of microbial communities in ground water

Cited by 18 publications

References 17 publications

Groundwater Ecosystems Vary with Land Use across a Mixed Agricultural Landscape

Groundwater Ecosystems Vary with Land Use across a Mixed Agricultural Landscape

Habitat, water quality, seasonality, or site? Identifying environmental correlates of the distribution of groundwater biota

A tiered framework for assessing groundwater ecosystem health

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