Can urban forests provide acoustic refuges for birds?Investigating the influence of vegetation structure and anthropogenic noise on bird sound diversity  

作　　者：Zezhou Hao Chengyun Zhang Le Li Bing Sun Shuixing Luo Juyang Liao Qingfei Wang Ruichen Wu Xinhui Xu Christopher A.Lepczyk Nancai Pei 

机构地区：[1]Research Institute of Tropical Forestry,Chinese Academy of Forestry,Guangzhou 510520,People’s Republic of China [2]School of Electronics and Communication Engineering,Guangzhou University,Guangzhou 510006,People’s Republic of China [3]Hunan Botanical Barden,Changsha 410116,People’s Republic of China [4]Guangdong Eco-Engineering Polytechnic,Guangzhou 510520,People’s Republic of China [5]College of Forestry,Wildlife and Environment,Auburn University,Auburn,AL 36849,USA

出　　处：《Journal of Forestry Research》2024年第2期163-175,共13页林业研究（英文版）

基　　金：the National Natural Science Foundation of China(32201338);Science Technology Program from the Forestry Administration of Guangdong Province(2021KJCX017);Guangzhou Municipal Science and Technology Bureau Program(2023A04J0086);Shenzhen Key Laboratory of Southern Subtropical Plant Diversity。

摘　　要：As a crucial component of terrestrial ecosystems,urban forests play a pivotal role in protecting urban biodiversity by providing suitable habitats for acoustic spaces.Previous studies note that vegetation structure is a key factor influencing bird sounds in urban forests;hence,adjusting the frequency composition may be a strategy for birds to avoid anthropogenic noise to mask their songs.However,it is unknown whether the response mechanisms of bird vocalizations to vegetation structure remain consistent despite being impacted by anthropogenic noise.It was hypothesized that anthropogenic noise in urban forests occupies the low-frequency space of bird songs,leading to a possible reshaping of the acoustic niches of forests,and the vegetation structure of urban forests is the critical factor that shapes the acoustic space for bird vocalization.Passive acoustic monitoring in various urban forests was used to monitor natural and anthropogenic noises,and sounds were classified into three acoustic scenes(bird sounds,human sounds,and bird-human sounds)to determine interconnections between bird sounds,anthropogenic noise,and vegetation structure.Anthropogenic noise altered the acoustic niche of urban forests by intruding into the low-frequency space used by birds,and vegetation structures related to volume(trunk volume and branch volume)and density(number of branches and leaf area index)significantly impact the diversity of bird sounds.Our findings indicate that the response to low and high frequency signals to vegetation structure is distinct.By clarifying this relationship,our results contribute to understanding of how vegetation structure influences bird sounds in urban forests impacted by anthropogenic noise.

关 键 词：Anthropogenic noise Bird sounds Urban forests Vegetation structure 

分 类 号：S718.6[农业科学—林学]