Between January and February 2008,a severe ice storm occurred in southern China.The storm damaged nearly 21 million hectares of forest lands with broken branch,trunk breakage,and stem bending of many trees.This natura...Between January and February 2008,a severe ice storm occurred in southern China.The storm damaged nearly 21 million hectares of forest lands with broken branch,trunk breakage,and stem bending of many trees.This natural disturbance provides a unique opportunity to study impacts of extreme climatic event on forest birds.Using hierarchical multi-species occupancy model(species richness;27 species)and N-mixture model(abundance;3 species),we investigated how the storm affected resident bird species in subtropical forest in southern China.We sampled birds at Chebaling National Nature Reserve in Guangdong Province,monthly for 1 year each before and after the storm by mist nets.To take into account variations in temperature between years and between months,we incorporated monthly mean temperature into the models as an additional covariate.Observed species richness was greater before the storm.Estimated species richness(from the hierarchical model)also tended to be greater before than after the storm although 95%Bayesian credible intervals of these estimates were overlapped.Temperature showed a negative effect on estimated species richness,indicating greater species richness during winter.Among three species captured the most,abundance of Chestnut Bulbul(Hemixos castanonotus)significantly decreased after the storm.Other two species,Grey Treepie(Dendrocitta formosae)and Huet’s Fulvetta(Alcippe hueti)showed insignificant responses to the storm.Our study indicates that the 2008 ice storm may not have a significant impact on species richness of resident birds in subtropical forest;however,the effect can be species-specific and negative to some species’population.展开更多
基金the National Natural Science Foundation of China(31672265,31670445)the GDAS Special Project of Science and Technology Development(2018GDASCX-0107)+1 种基金the First Wildlife Monitoring of National Forest Nature Reserve in Guangdong(0877-16GZTP01D060)the Forest Resource Survey and Cultivation of Chebaling National Nature Reserve(SX15GZ022)to F.S.Zou.
文摘Between January and February 2008,a severe ice storm occurred in southern China.The storm damaged nearly 21 million hectares of forest lands with broken branch,trunk breakage,and stem bending of many trees.This natural disturbance provides a unique opportunity to study impacts of extreme climatic event on forest birds.Using hierarchical multi-species occupancy model(species richness;27 species)and N-mixture model(abundance;3 species),we investigated how the storm affected resident bird species in subtropical forest in southern China.We sampled birds at Chebaling National Nature Reserve in Guangdong Province,monthly for 1 year each before and after the storm by mist nets.To take into account variations in temperature between years and between months,we incorporated monthly mean temperature into the models as an additional covariate.Observed species richness was greater before the storm.Estimated species richness(from the hierarchical model)also tended to be greater before than after the storm although 95%Bayesian credible intervals of these estimates were overlapped.Temperature showed a negative effect on estimated species richness,indicating greater species richness during winter.Among three species captured the most,abundance of Chestnut Bulbul(Hemixos castanonotus)significantly decreased after the storm.Other two species,Grey Treepie(Dendrocitta formosae)and Huet’s Fulvetta(Alcippe hueti)showed insignificant responses to the storm.Our study indicates that the 2008 ice storm may not have a significant impact on species richness of resident birds in subtropical forest;however,the effect can be species-specific and negative to some species’population.
