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Table 1 Overview of the specimens analyzed (including a description of the sampling sites and their main geochemical parameters)

From: Unsuspected diversity of Niphargus amphipods in the chemoautotrophic cave ecosystem of Frasassi, central Italy

Sampling site (abbreviations) Type of water body Geochemistrya Number of specimens analyzed (per collection year)
   [H2S] (μM) [O2] (μM) 2007 2008 2009
Il Bugianardo (BUG, BG) Stagnant pool n.d. 151   17  
Sorgente del Tunnel (ST) Flowing stream 136 31    8
Grotta Sulfurea (GS) Stream with stagnant eddies 118 51   14 2
Grotta Bella (GB) Flowing stream 45 6   8 1
Pozzo dei Cristalli (PDC, PC) Flowing stream with stagnant pond caused by obstruction 415 12 11 23 8
Lago Verde (LVE, LV) Stagnant lake 415 2 10 23  
Ramo Sulfureo (RS) Stream with stagnant eddies 109 10 7 18  
Lago del Rinoceronte (LRI) Stagnant lake (stratified b) n.a n.a.   8  
Lago Stratificato (LST) Stagnant lake n.a. n.a.   5  
Lago Primo (LPR) Stagnant lake (stratified b) n.a. n.a.   6  
Lago Claudia (LCL, LC) Stagnant lake 45 8   8 7
  1. a all measurements reported here were performed in May-June 2009
  2. b i.e., with a sulfidic lower layer and an oxygenated upper layer
  3. n.d. = non detectable
  4. n.a. = not available