城市化对繁殖期白鹭的影响

Impacts of Urbanization on Little Egrets in Breeding Season

2005年2月到6月,选取曲阜孔庙、孔林、沂河和泗河作为不同城市化程度的白鹭(Egrettagarzetta)栖息地,从营巢、取食和人为干扰三个方面初步研究了城市化对繁殖期白鹭行为的影响.结果表明:在孔庙和孔林,随着城市化程度的提高,白鹭的营巢密度逐渐减小,营巢高度逐渐增大,惊飞距离逐渐减小.在沂河和泗河,随着城市化程度的提高,白鹭的密度和觅食频率逐渐减小,惊飞距离先减小后增大.

Studies on impacts of Urbanization on little Egrets in breeding season were conducted from February to June in 2005. Confucian temple, Confucian cemetery, the river Yi and the river Si were selected as different urbanization habitats of little Egrets in Qufu. The results indicates that the density of the nests is decreased, the height of the nests above the ground is increased and the flushing distance is decreased with the enhancement of urbanization in Confucian temple and Confucian cemetery. The density and the foraging frequency of the birds is decreased, while the flushing distance is decreased at first, then increased with the enhancement of urbanization in the river Yi and the river Si.