The research study was conducted to assess and quantify the current status of avifauna biodiversity assets of Aurora State College of Technology’s Forest Reservation in Baler, Aurora, Philippines. Assessment of avifa...The research study was conducted to assess and quantify the current status of avifauna biodiversity assets of Aurora State College of Technology’s Forest Reservation in Baler, Aurora, Philippines. Assessment of avifaunal diversity was undertaken by traversing the four established circular plots having a radius of 125 meters or 250 meters diameters each as permanent monitoring stations. Study revealed a total number of 151 Individual species, classified into 23 genera and 21 families. Eighteen of these species are endemic while the remaining five were fully migrated birds. All birds observed were classified as Least Concern (LC) species according to the International Union for Conservation of Nature’s Red List of Threatened Species and the updated list of the Birds of the World online. Its abundance, richness and diversity index were calculated using Shannon Diversity Index (H') while Pielou’s evenness (J') for distribution of species. Forest reservation of ASCOT has more even (0.756 J') and moderate diversity (2.812 H') observation on avifauna in general. However, this avian population evaluation was threatened into a verge of extinction due to natural and anthropological threats that causes forest deforestation. Such deforestation of habitat causes dwindling of wildlife territory leading to the scarcity of bird’s population. Thus, the assessment was conducted to aid ASCOT administration find significant plans to ensure sustainable conservation and protection of the remaining avifauna species in the reservation area.展开更多
The survey of bird species in Zijin Mountain area of Nanjing were conducted from September 2005 to April 2007.A total of 164 species belonging to 15 orders and 44 families were recorded,including 59 resident birds,34 ...The survey of bird species in Zijin Mountain area of Nanjing were conducted from September 2005 to April 2007.A total of 164 species belonging to 15 orders and 44 families were recorded,including 59 resident birds,34 summer migrants,41 winter migrants,29 passing birds,and one vagrant bird.There were 25 species listed as key protected wild animal species in China,and 56 species in key protected birds in Jiangsu Province.The avifauna was composed of Palaearctic realm species(51.22%),Oriental realm species(40.24%)and cosmopolitan species(8.54%),showing the characteristics of north-south transition.In summary,there are abundant bird species in Zijin Mountain,but with low population number and density.展开更多
Strong correlations between species diversity and climate have been widely observed,but the mechanism underlying this relationship is unclear.Here,we explored the causes of the richness-climate relationships among pas...Strong correlations between species diversity and climate have been widely observed,but the mechanism underlying this relationship is unclear.Here,we explored the causes of the richness-climate relationships among passerine birds in China by integrating tropical conservatism and diversification rate hypotheses using path models.We found that assemblages with higher species richness southwest of the Salween-Mekong-Pearl River Divide are phylogenetically overdispersed and have shorter mean root distances(MRDs),while species-rich regions northeast of this divide(e.g.,north Hengduan Mountains-south Qinling Mountains)are phylogenetically clustered and have longer MRDs.The results of the path analyses showed that the direct effect of climatic factors on species richness was stronger than their indirect effects on species richness via phylogenetic relatedness,indicating that neither tropical conservatism nor diversification rate hypotheses can well explain the richness-climate relationship among passerines in China.However,when path analyses were conducted within subregions separately,we found that the tropical conservatism hypothesis was well supported in the southwestern Salween-Mekong-Pearl River Divide,while the diversification rate hypothesis could explain the richness-climate relationship well in the northeastern divide.We conclude that the diversity patterns of passerines in different subregions of the Eastern Himalayas-Mountains of Southwest China may be shaped by different evolutionary processes related to geological and climatic histories,which explains why the tropical conservatism or diversification rate hypothesis alone cannot fully explain the richness-climate relationships.展开更多
From January. 1996 to January 1997, birds survey was carried out in 4 mangrove wetlands in Fujian. As a result, 92 species, belonging to 55 genera, 27 families, and 13 orders were recorded. Among them, 29 species, 31 ...From January. 1996 to January 1997, birds survey was carried out in 4 mangrove wetlands in Fujian. As a result, 92 species, belonging to 55 genera, 27 families, and 13 orders were recorded. Among them, 29 species, 31 52% of the total were passeriformes; 63 species, 68 48% of the total were nonpasseriformes. The survey revealed that the bird communities in Fujian mangrove wetlands had the features as follows:①Nonpasseriformes was more than passeriformes. Wading birds were more abundant in bird communities. ②Farm birds were common and forest birds were scarce. ③Lack of endemic species. ④Winter visitors and passing migrants were dominant in bird communities. ⑤Migrant behaviors varied with species. ⑥Mangrove wetland is important for bird conservation, especially for egrets and migrant wadings.展开更多
文摘The research study was conducted to assess and quantify the current status of avifauna biodiversity assets of Aurora State College of Technology’s Forest Reservation in Baler, Aurora, Philippines. Assessment of avifaunal diversity was undertaken by traversing the four established circular plots having a radius of 125 meters or 250 meters diameters each as permanent monitoring stations. Study revealed a total number of 151 Individual species, classified into 23 genera and 21 families. Eighteen of these species are endemic while the remaining five were fully migrated birds. All birds observed were classified as Least Concern (LC) species according to the International Union for Conservation of Nature’s Red List of Threatened Species and the updated list of the Birds of the World online. Its abundance, richness and diversity index were calculated using Shannon Diversity Index (H') while Pielou’s evenness (J') for distribution of species. Forest reservation of ASCOT has more even (0.756 J') and moderate diversity (2.812 H') observation on avifauna in general. However, this avian population evaluation was threatened into a verge of extinction due to natural and anthropological threats that causes forest deforestation. Such deforestation of habitat causes dwindling of wildlife territory leading to the scarcity of bird’s population. Thus, the assessment was conducted to aid ASCOT administration find significant plans to ensure sustainable conservation and protection of the remaining avifauna species in the reservation area.
文摘The survey of bird species in Zijin Mountain area of Nanjing were conducted from September 2005 to April 2007.A total of 164 species belonging to 15 orders and 44 families were recorded,including 59 resident birds,34 summer migrants,41 winter migrants,29 passing birds,and one vagrant bird.There were 25 species listed as key protected wild animal species in China,and 56 species in key protected birds in Jiangsu Province.The avifauna was composed of Palaearctic realm species(51.22%),Oriental realm species(40.24%)and cosmopolitan species(8.54%),showing the characteristics of north-south transition.In summary,there are abundant bird species in Zijin Mountain,but with low population number and density.
基金supported by the Strategic Priority Research Program of the Chinese Academy of Sciences[XDA19050202]the National Natural Science Foundation of China[31630069]+1 种基金the Second Tibetan Plateau Scientific Expedition and Research(STEP)programme[2019QZKK05010112 and 2019QZKK0304]other programs[KGFZD-135-19-05].
文摘Strong correlations between species diversity and climate have been widely observed,but the mechanism underlying this relationship is unclear.Here,we explored the causes of the richness-climate relationships among passerine birds in China by integrating tropical conservatism and diversification rate hypotheses using path models.We found that assemblages with higher species richness southwest of the Salween-Mekong-Pearl River Divide are phylogenetically overdispersed and have shorter mean root distances(MRDs),while species-rich regions northeast of this divide(e.g.,north Hengduan Mountains-south Qinling Mountains)are phylogenetically clustered and have longer MRDs.The results of the path analyses showed that the direct effect of climatic factors on species richness was stronger than their indirect effects on species richness via phylogenetic relatedness,indicating that neither tropical conservatism nor diversification rate hypotheses can well explain the richness-climate relationship among passerines in China.However,when path analyses were conducted within subregions separately,we found that the tropical conservatism hypothesis was well supported in the southwestern Salween-Mekong-Pearl River Divide,while the diversification rate hypothesis could explain the richness-climate relationship well in the northeastern divide.We conclude that the diversity patterns of passerines in different subregions of the Eastern Himalayas-Mountains of Southwest China may be shaped by different evolutionary processes related to geological and climatic histories,which explains why the tropical conservatism or diversification rate hypothesis alone cannot fully explain the richness-climate relationships.
文摘From January. 1996 to January 1997, birds survey was carried out in 4 mangrove wetlands in Fujian. As a result, 92 species, belonging to 55 genera, 27 families, and 13 orders were recorded. Among them, 29 species, 31 52% of the total were passeriformes; 63 species, 68 48% of the total were nonpasseriformes. The survey revealed that the bird communities in Fujian mangrove wetlands had the features as follows:①Nonpasseriformes was more than passeriformes. Wading birds were more abundant in bird communities. ②Farm birds were common and forest birds were scarce. ③Lack of endemic species. ④Winter visitors and passing migrants were dominant in bird communities. ⑤Migrant behaviors varied with species. ⑥Mangrove wetland is important for bird conservation, especially for egrets and migrant wadings.
