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. 2008 Oct 30;105(44):17006–17011. doi: 10.1073/pnas.0803898105

Table 1.

Peaks in Spearman-rank cross correlations (rs) with resulting P-values comparing the density and biomass-based total abundance (TAD and TAB), and phyla composition (PCD and PCB) and rank-abundance distribution (RADD and RADB) MDS x-ordinates of similarity to POC flux and the NOI over monthly timescales with the community parameter lagging the resource or environment variable by the number of months shown and yearly correlations between the above community parameters

Macrofauna parameters Monthly
 Yearly
POC flux
 P NOI
 P POC flux
 P NOI
 P
Lag n rs Lag n rs n rs n rs
Density-based
    Phyla comp. sim. (PCD, MDS x-ord.) 4 25 0.33 0.112 10 26 0.38 0.053 7 0.68 0.090 7 0.77 0.041
    Rank ab. dist. sim. (RADD, MDS x-ord.) 4 25 0.33 0.110 9 26 0.31 0.127 7 0.68 0.094 7 0.86 0.014
    Total ab. (TAD, ind. grab−1) 4 25 0.38 0.059 9 26 0.36 0.074 7 0.57 0.180 7 0.93 0.003
    Phylum density (ind. grab−1)
        Nematoda 4 25 0.31 0.135 9 26 0.24 0.246 7 −0.04 0.939 7 0.68 0.094
        Arthropoda 3 25 0.41 0.040 9 26 0.49 0.011 7 0.75 0.052 7 0.54 0.215
        Annelida 3 25 0.35 0.090 9 26 0.46 0.019 7 0.54 0.215 7 0.82 0.023
        Nemertina 4 25 −0.28 0.178 9 26 −0.35 0.079 7 −0.07 0.879 7 0.21 0.645
Biomass-based
    Phyla comp. sim. (PCB, MDS x-ord.) 7 21 0.45 0.040 10 22 0.32 0.151 6 0.46 0.354 6 0.58 0.228
    Rank ab. dist. sim. (RADB, MDS x-ord.) 7 21 0.61 0.003 13 22 0.27 0.219 6 0.83 0.042 6 0.71 0.111
    Total ab. (TAB, g·grab−1) 8 21 0.61 0.004 13 22 0.30 0.179 6 0.83 0.042 6 0.71 0.111
    Phylum biomass (g grab−1):
        Nematoda 4 22 0.48 0.025 5 22 0.30 0.182 6 0.03 0.957 6 0.31 0.544
        Arthropoda 7 21 0.62 0.003 8 22 0.48 0.025 6 0.89 0.019 6 1.00 0.000
        Annelida 10 22 0.38 0.081 15 22 0.33 0.139 6 0.26 0.623 6 0.26 0.623
        Nemertina 4 22 −0.43 0.044 9 22 −0.58 0.005 6 0.09 0.872 6 −0.09 0.872

Marginal (0.05 < P ≤ 0.10) correlations are shown in italics and significant links are in boldface type (P ≤ 0.05). The yearly density correlations have no lag and the biomass correlations were done with a year lag between environment or resource change and community change in accordance with the longer temporal lags noted in the monthly biomass-based correlations.