Abstract: For the animals living in the areas with high level ambient noise, their call signals could be overlapped with the frequency, amplitude, and temporal characters of the noise, making the spread efficiency of the animals acoustic signals decreased. Birds mainly rely on their songs for communication. The lower level spread efficiency of their acoustic signal will impact their individual recognition, mate selection, territorial defense, population density, community structure, and so on. This paper summarized the impacts of ambient noise, including urban noise and natural noise, on bird song and the adaptation strategies of birds, pointed out the concerns of these impacts in urbanization, and prospected the possible hotspots in the future research.

Key words: Salix matsudana, Shading, Growth and allocation, Physiological feature, Correlative inhibition, Physiological integration