Does Microbial and Faunal Pattern Correspond to Dynamics in Hydrogeology and Hydrochemistry? Comparative Study of Two Isolated Groundwater Ecosystems in Münsterland, Germany

The objective of this study was to assess the temporal and spatial variability aquatic invertebrates microbial parameters (biomass activity) with environmental data in springs, determine impact key on ecological situation a groundwater system. Eight springs two areas Baumberge Schöppinger Berg (W-NW Münster, North Rhine Westphalia, Germany) were sampled at three sampling campaigns between 2018 2019. Physicochemical spring samples abundances determined each event. Samples for hydro(geo)chemical analyses collected during campaign springs. Spearman correlation principal component analysis used identify parameters. abundance activity significantly positively correlated table fluctuation. stygobite individuals Groundwater-Fauna-Index phosphate Baumberge, negatively chloride Berg. Most notably, stable isotopes water inversely correlated. results showed no significant differences both systems. Stable indicate meteoric origin, an effect evaporation months, even though downward percolation recharge rates are high. nitrate concentration higher than 50 mg/L only SB due agricultural activities. Nitrate input into comes from sources while it one source There evidence denitrification areas. Secondary gypsum is assumed be sulfate Berg, but anaerobic oxidation pyrite deeper part system as cannot excluded.