Bioindikation im Grundwasser: Metazoen

Bork, Jörg; Berkhoff, Sven; Hahn, Hans Jürgen

doi:10.1002/9783527678488.hbal2009003

Cited by 1 publication

(3 citation statements)

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“…The net is then raised and lowered 10 times, during which animals are rinsed into the collecting box. Through net-sampling, semi-quantitative data are obtained (Bork et al 2009a). The samples were stored in a cold box and preserved with formaldehyde (4%) at the end of each sampling day.…”

Section: Sampling and Processing Of Samplesmentioning

confidence: 99%

“…Pumping has several disadvantages, not least of which are the high expenditure and labour intensivity (Hahn 2002;Bork et al 2009a;Hancock and Boulton 2009). An alternative is net-sampling, first described by Cvetkov (1968).…”

Section: Introductionmentioning

confidence: 99%

“…According to Sinton (1984) and Hahn and Matzke (2005), faunal composition of the bore-surrounding aquifer is considered to be representative of the aquifer. The net-sampler is a low-priced, efficient, light and rapid sampling device, which is especially suitable for biogeographic surveys (Allford et al 2008;Bork et al 2009a).…”

Section: Introductionmentioning

confidence: 99%

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Efficiency of sampling invertebrates in groundwater habitats

et al. 2013

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a b s t r a c tSampling efficiency is directly linked to (faunistic) stability issues of any sampled site. It is more probable to sample a high proportion of the species occurring at a certain site, if communities remain constant in species composition with time. For this study 64 groundwater monitoring wells in Southwestern Germany were sampled six times to determine sampling efficiency. False-Negative (FN) rates and SIMPER values, two independent models expressing Faunistic values of the sampled bores, were calculated and three groups of faunistic stability could be identified based on calculated SIMPER-values. FN-rates as well as SIMPER values proved to be a valuable approach for the estimation of faunistic stability/instability, as these methods showed a highly negative correlation with each other. To collect 95% of species a number of 1.7-16.4 samples was calculated to be necessary depending on faunistic stability of the sampled habitat. On the six sampling occasions the sites harbouring a stable groundwater meiofauna resulted in 98.2% of occurring species, whereas the percentage decreased over intermediate sites (94.9%) and stressed sites (79.5%).A consequence of the data presented may be to view surveys using only two samples as campaign with orienting character, with further studies of stability issues of groundwater communities which would provide efficient and effective sampling for various kinds of sites.

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Section: Sampling and Processing Of Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%