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Table 7

Standardised mean differences in abundance of each species plus total number of individuals at newly and heavily dredged sites, compared to control conditions across both sampling times.

Species Newly opened vs. control Heavy dredging vs. control
  Hedges' d S.E. Hedges' d S.E.
H. diversicolor 1.169 0.426 0.289 0.409
Tubificoides spp. 0.006 0.412 0.100 0.413
A. marioni 0.678 0.413 0.522 0.411
S. shrubsolii 0.691 0.419 0.476 0.415
P. ulvae −0.581 0.416 −0.755 0.415
A. tenuis −0.273 0.409 −1.499 0.432
Total individuals 0.267 0.427 0.175 0.418

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