生态过滤机制对吉林省西部农田防护林繁殖鸟类群落结构的影响

Bird assemblages are an important component of the field ecosystem,and research on the structure of bird assemblages can provide theoretical reference for the protection of biodiversity in field ecosystems.To reveal the impact of ecological filtering mechanism on the structure of bird assemblage in agricultural protection forest in western Jilin Province,in April and June of 2022 and 2023,point count method was used to conduct surveys of breeding bird assemblages,the environmental variables of farmland shelterbelts around the sample sites were recorded,and the joint species distribution model was used to analyze the effects of environmental factors and interspecific interactions on bird assemblages.A total of 167 sample sites were investigated,and 65 species of birds belonging to 36 families and 17 orders were recorded.The results showed that the breeding bird assemblages in agricultural protection forest in western Jilin Province was affected by both environmental factors and interspecific interactions,on which interspecific interactions dominated.Higher degree of niche overlap among birds leaded to resource partitioning and reduces interspecific competition.The analysis results of the joint species distribution model showed that the breeding birds in agricultural protection forest of western Jilin Province were distributed relatively concentratedly,with similar foraging and breeding environments.The interspecific interactions between different species affected the distribution patterns of species and subsequently influence the composition of the breeding bird assemblages.The study clarified the influence of ecological filtering mechanism on the structure of the breeding bird assemblages in agricultural protection forest in western Jilin Province and provided a basis for the rational allocation and optimization of the current protective forests.