Foraging Preferences of Lesser Spotted Woodpecker in Natural Secondary Forest
The foraging preferences of lesser spotted woodpeckers(Dryobates minor)was investigated in the National Field Scientific Observation and Research Station of Maoershan Forest Ecosystem in Heilongjiang Province during March to June 2022.We tracked lesser spotted woodpecker by using quadrat combined with transect method and radio tracking tech-nology.Foraging tree characteristics and foraging habitat preferences of lesser spotted woodpeckers were analyzed by Bai-ley's method based on utilization-availability method.The main factors influencing their choices of foraging tree and forag-ing habitat were analyzed by principal component analysis.The differences of sexes in foraging behavior and main influen-tial factors of foraging selection were explored by Fisher's exact test,Mann-Whitney U test and Kendall's tau-b correlation analysis.The results are as follows.Lesser spotted woodpeckers preferred pecking on branches of the upper canopy of standing trees for a short time.The wood density,height of foraging trees,slope degree,dominant species,nearest dis-tance of human disturbance,and the mean tree height in quadrat are the main factors affecting the selection of foraging trees and foraging habitats for lesser spotted woodpeckers.Both males and females preferred to forage on habitats with moderate density and trees of about 15 m height.They selected flat slope area as preferred foraging habitat.They pre-ferred to foraging in the forest with Ulmus davidiana var.japonica or Juglans mandshurica as the dominant species,average tree height of 13 m,and near human disturbance.Compared with females,males also preferred to forage on habitats with low density and trees of 3-5 m height.
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NSTL
万方数据
维普
