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v : m pattern Id pattern Ip pattern
P. elegans 31.69 ***A 1.944 *A 0.507 *A
A. marina 1.58 **A 1.156 *A 0.501 *A
L. conchilega 8.79 ***A 2.846 *A 0.514 *A
N. hombergii 1.08 Random 0.018 Random 0.109 Random
E. cf flava 2.14 ***A 1.664 *A 0.504 *A
M. balthica 5.09 ***A 1.431 *A 0.503 *A
C. edule 0.91 Random 0.986 Random -0.143 Random
B. sarsi 5.95 ***A 4.093 *A 0.523 *A
G. duebeni 4.27 ***A 2.505 *A 0.511 *A
Table 2.2 : Indices of dispersion for each of the taxa in the lm grid survey. The
results from the variance to mean ratio, Morisita's index (Id) and standardised
Morisita's index (In) are given together with the type of dispersion/pattern they
suggest (A=Aggregated) and the significance level. * Denotes significance at p