Before revision:  We find a stronger repulsion between nearest neighbours than between next-to-nearest ones, for more than the first half of the observed period. The increase of the absolute density of nests observed in that area over the monitored period of time leads to an increase of repulsion among neighbouring nests.
After revision:  We find a stronger repulsion between nearest neighbours than between next-to-nearest ones, for more than the first half of the observed increase in absolute population density over the monitored period of time leads to an increase of repulsion among neighbouring nests.