In the ground-nest experiment there was a very low predation rate (0.06) and no detectable difference among treatments (p = 0.403). or 60% basal area removal), clearcut, and uncut forests in northwestern British Columbia, in two experiments using ground-placed (1993) and shrub-placed (1998) artificial nests. We compared predation rates (proportion of nests disturbed in a 14-day period) in partially cut (30. One of the primary limitations to nesting success is nest predation. Read moreīased on relative abundance data, partial cutting has been suggested as a technique to maintain habitat for birds associated with late-seral forests, but there has been little study of partial cutting effects on nesting success. In other plots differences in aggregation did not have the directional nature and, in most cases, were not significant.

Only in one plot the aggregation (the number of individuals of a given species feeding simultaneously) increased significantly along with moving the food into open area. The numbers of the other 7 species of birds fell or did not have directional nature. In other plot the number of the most numerous Great Tit Parus major and Blue Tit Cyanistes caeruleus significantly increased along with the food source being moved away into open area. significantly decreased along with the food being moved away from the edge of the forest. Only in one plot the total number of all the birds feeding on lard. In each of three plots the extra food (lard) was initially placed on the border of the forest and open area and then moved into the open area and located within 15, 30 and 45 m from the edge of the forest.

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