The Wilcoxon matched pair tests revealed marginal effects on the average scores of presence (barn owl: W = 170, P = 0.060; tawny owl: W = 25, P = 0.078), suggesting a decreasing trend in presence in formerly unilluminated towers that have become illuminated.
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Artificial light at night (ALAN) negatively affects nest site occupancy but does not influence breeding success in two sympatric owl species.
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