Sampling Fauna in Stream Sediments as well as Groundwater Using One Net Sampler

Schmidt, Susanne I.; Hahn, Hans Jürgen; Watson, G.D.; Woodbury, Robert J.; Hatton, Timothy J.

doi:10.1002/aheh.200300522

Cited by 13 publications

(5 citation statements)

References 11 publications

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“…4, MDS). This is consistent with the findings of previous studies (Hahn, 2005;Hahn and Matzke, 2005;Schmidt et al, 2004). However, the differences between trap and aquifer water found in the hyporheic zone, might be a result of low hydraulic conductance of the surrounding sediment, which leads to shortcuts with surface water, while pumping.…”

Section: Water Chemistrysupporting

confidence: 93%

“…In a preliminary study, he found no significant differences between trap and aquifer water. This is in accordance with other studies (Hahn, 2003;Hahn and Matzke, 2005;Schmidt et al, 2004), where physical and chemical characteristics of water samples taken from a trap or inside a bore were similar to the aquifer water. With respect to fauna, Hahn (2005) concluded that traps provide representative results which do indeed reflect the communities around.…”

Section: Introductionsupporting

confidence: 93%

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Testing unbaited stygofauna traps for sampling performance

Bork

Berkhoff

et al. 2008

Limnologica

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Unbaited phreatic traps are a promising new method for sampling subterranean limnofauna. The aim of this study is to evaluate whether such trap systems are suitable to gather representative samples of the physico-chemical parameters and the invertebrate fauna of the aquifer. Fifteen traps, installed in five groundwater bores, and four traps located in the hyporheic zone, were sampled twice monthly over a 1 year period (June 2003-June 2004). Water samples were removed in three separated fractions (hose, trap and aquifer water), analysed for physico-chemical and faunal characteristics and compared with one another. The study was carried out in the Nakdong River floodplain, Korea. Physico-chemical characteristics of trap and aquifer were similar, but differed greatly from the hose samples. Abundances of fauna inside the traps were higher than in the aquifer, whereas there were no differences in taxonomic composition of the trap and aquifer samples. Biases of abundances suspected due to the use of traps were negligible in the groundwater, though it is recommended that comparisons between groundwater and hyporheic abundances ascertained by traps be handled cautiously.

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Section: Water Chemistrysupporting

confidence: 93%

Section: Introductionsupporting

confidence: 93%

Testing unbaited stygofauna traps for sampling performance

Bork

Berkhoff

et al. 2008

Limnologica

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“…Fauna was sampled first with a 70 µm pore net (manufactured by Institut für Grundwasserökologie GmbH, Landau, Germany) lowered down the well and drawn up at arm’s length for ten times to scoop up bottom-living fauna (Bou, 1974; Matzke & Hahn, 2002; Schmidt et al, 2004). Subsequently, from the pumped water stream, 50 L aliquots of pumped water were taken and sieved through the same net.…”

Section: Methodsmentioning

confidence: 99%

Direct and indirect effects of the increase in atmospheric CO₂and temperature on groundwater organisms

Schmidt,

Svátková,

Kodeš

et al. 2023

Preprint

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Atmospherically rising temperature and CO2 impact all freshwater systems, including groundwater. Increasing CO2 leads to more intense weathering of silicate rocks. Here, we tested whether the increased levels, the weathering, or rather the increasing temperature, impacted on fauna and prokaryotes in the groundwater ecosystem. We conducted the analyses separately for deep, i.e. secluded, and shallow, quaternary aquifers which exchange with the surface more intensely. Organism abundances and relative composition did not correlate with temperature or CO2 levels. While many organisms rely on silica, in contrast, we found negative correlations between silica and fauna. The increases in silica over time, i.e. temporal trends, also partly correlated negatively with organisms. We hypothesize that the unexpected negative correlations are not direct effects, but indirectly indicate that groundwater communities do not adapt rapidly enough to changes. This jeopardizes future drinking water production which relies on the self-cleaning ecosystem services in groundwater.

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“…Since its foundation in 1948, this semi-natural experimental setting has aided generations of subterranean biologists in the challenging task of shedding light on the natural history and behavior of a wide range of elusive subterranean life forms (Clergue-Gazeau, 1974;Durand, 1970;Juberthie, 1985;Juberthie et al, 1996;Manenti et al, 2020). For aquifers, the equivalent would be to lower sediment, substrate cages, bags into groundwater wells (Schmidt et al, 2004), which, however, would still have to be retrieved every time to study the organisms.…”

Section: Quasi In-situmentioning

confidence: 99%

Collecting eco‐evolutionary data in the dark: Impediments to subterranean research and how to overcome them

Mammola

Lunghi

Bilandžija

et al. 2021

Ecology and Evolution

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Caves and other subterranean habitats fulfill the requirements of experimental model systems to address general questions in ecology and evolution. Yet, the harsh working conditions of these environments and the uniqueness of the subterranean organisms have challenged most attempts to pursuit standardized research. Two main obstacles have synergistically hampered previous attempts. First, there is a habitat impediment related to the objective difficulties of exploring subterranean habitats and our inability to access the network of fissures that represents the elective habitat for the so‐called “cave species.” Second, there is a biological impediment illustrated by the rarity of most subterranean species and their low physiological tolerance, often limiting sample size and complicating laboratory experiments. We explore the advantages and disadvantages of four general experimental setups ( in situ , quasi in situ , ex situ , and in silico ) in the light of habitat and biological impediments. We also discuss the potential of indirect approaches to research. Furthermore, using bibliometric data, we provide a quantitative overview of the model organisms that scientists have exploited in the study of subterranean life. Our over‐arching goal is to promote caves as model systems where one can perform standardized scientific research. This is important not only to achieve an in‐depth understanding of the functioning of subterranean ecosystems but also to fully exploit their long‐discussed potential in addressing general scientific questions with implications beyond the boundaries of this discipline.

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Sampling Fauna in Stream Sediments as well as Groundwater Using One Net Sampler

Cited by 13 publications

References 11 publications

Testing unbaited stygofauna traps for sampling performance

Testing unbaited stygofauna traps for sampling performance

Direct and indirect effects of the increase in atmospheric CO₂and temperature on groundwater organisms

Collecting eco‐evolutionary data in the dark: Impediments to subterranean research and how to overcome them

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Sampling Fauna in Stream Sediments as well as Groundwater Using One Net Sampler

Cited by 13 publications

References 11 publications

Testing unbaited stygofauna traps for sampling performance

Testing unbaited stygofauna traps for sampling performance

Direct and indirect effects of the increase in atmospheric CO2and temperature on groundwater organisms

Collecting eco‐evolutionary data in the dark: Impediments to subterranean research and how to overcome them

Contact Info

Product

Resources

About

Direct and indirect effects of the increase in atmospheric CO₂and temperature on groundwater organisms