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Table 3 Comparison of some vegetation parameters around nestboxes used by Muscardinus avellanarius

From: Nest site selection by the hazel dormouse Muscardinus avellanarius: is safety more important than food?

Vegetation parameter Nestboxes used for breeding, mean ± SD Nestboxes not used for breeding, mean ± SD t value p
Cover of pedunculate oaks 56.00 ± 80.77 129.14 ± 174.13 -1.79 0.08
Number of grey alder trees 12.29 ± 22.28 4.45 ± 6.72 1.79 0.08
Number of Norway spruce trees in canopy 17.95 ± 15.61 33.52 ± 24.12 -2.59 0.01
Number of bird cherry trees 49.86 ± 56.46 22.59 ± 27.11 2.27 0.03
Number of common hornbeam trees 7.38 ± 23.45 0.48 ± 1.27 1.59 0.12
Connectivity of nestbox tree with its surroundingsa 6.71 ± 2.53 5.48 ± 2.95 1.54 0.13
Number of shrub species 5.71 ± 0.90 5.17 ± 1.14 1.81 0.08
  1. Nestboxes used for breeding and not used for breeding at study site in Lithuania are compared (Student’s t test, d.f. = 48). aThe number of trees and shrubs which had a crown or a trunk connected to the crown of the nestbox tree.