Acoustic biomonitoring 1 Audio acoustics 1 Audio recordings 1 Bioacoustics 1 Biodiversity 1 Bird diversity 1 Birds 1 China 1 Ecology 1 Forestry 1 Hexapoda 1 Importance factors 1 Long-term plot Long-term plots 1 Passive acoustic monitoring 1 Permanent plot 1 Permanent plots 1 Soundscape ecology 1 Southern China 1 Tree species diversity 1 Vegetation 1 Vegetation plots 1 biodiversity 1 digital elevation model 1 elevation 1 forest ecosystem 1 heterogeneity 1 species diversity 1 tree 1 vegetation type 1