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Table 2 Spearman rank correlations between species densities and environmental variables (sediment fractions: >63 μm, <63 μm (mud) expressed as percentage, median grain size (μm), total carbon (%), TOC (%), Chl a (mg/m²) and submergence time (h)

From: Spatial variability in structural and functional aspects of macrofauna communities and their environmental parameters in the Jade Bay (Wadden Sea Lower Saxony, southern North Sea)

Species >63 μm (%) <63 μm% (mud) Median grain size (μm) Total carbon (%) TOC (%) Chl a (mg/m²) Submergence (h)
Hydrobia ulvae −0.12** 0.06 −0.14*** 0.25*** 0.21*** 0.32*** −0.38***
Cerstoderma edule −0.08* 0.13*** −0.13** 0.10* 0.06 ns 0.21*** −0.28***
Pygospio elegans −0.19*** 0.18*** −0.14*** 0.14*** 0.13*** 0.19*** −0.24***
Tubificoides benedii −0.59*** 0.53*** −0.52*** 0.49*** 0.45*** 0.64*** −0.62***
Scoloplos armiger 0.34*** −0.26*** 0.38*** −0.31*** −0.28*** −0.44*** 0.44***
Corophium volutator −0.11** 0.14*** −0.16*** 0.07 0.08 0.09 −0.17***
Corophium spp. −0.21*** 0.26*** −0.23*** 0.15*** 0.15*** 0.20 *** −0.20***
Eteone longa −0.07 0.09* −0.02 0.01 −0.02 0.09 −0.15***
Hediste diversicolor −0.43*** 0.34*** −0.35*** 0.36*** 0.32*** 0.52*** −0.44***
Bathyporeia sarsi 0.24*** −0.24*** 0.23*** −0.23*** −0.22*** −0.20*** 0.08
Caulleriella killariensis −0.26*** 0.19*** −0.25*** 0.14*** 0.14*** 0.18** 0.06
Retusa obtusa −0.34*** 0.31*** −0.24*** 0.28*** 0.23*** 0.38*** −0.28***
Urothoe poseidonis 0.24*** −0.15*** 0.13** −0.26*** −0.25*** −0.15** −0.03
Ampharete acutifrons −0.09* 0.12** −0.05 0.08* 0.03 0.02 0.08*
Arenicola marina 0.11** −0.09* 0.06 −0.15*** −0.15*** 0.001 −0.23***
Heteromastus filiformis −0.46*** 0.44*** −0.42*** 0.35*** 0.33*** 0.42*** −0.30***
Nereis spp. −0.55*** 0.48*** −0.39*** 0.43*** 0.39*** 0.57*** −0.55***
Capitella capitata 0.20*** −0.07 0.11** −0.21*** −0.21*** −0.01 −0.06
Macoma balthica −0.37*** 0.30*** −0.25*** 0.32*** 0.29*** 0.38*** −0.44***
Scrobicularia plana −0.35*** 0.29*** −0.28*** 0.25*** 0.22*** 0.36*** −0.28***
Species richness −0.44*** 0.37*** −0.33*** 0.35*** 0.31*** 0.46*** −0.53***
Total abundance −0.24*** 0.22*** −0.24*** 0.36*** 0.32*** 0.41*** −0.46***
  1. Significance level p < 0.001 is indicated by ***, p < 0.01 by ** and p < 0.05 by *)