The Far North Region of Cameroon is home to a great diversity of bird species, which unfortunately remains very little explored. This work was initiated to establish an inventory of birds and the factors affecting the...The Far North Region of Cameroon is home to a great diversity of bird species, which unfortunately remains very little explored. This work was initiated to establish an inventory of birds and the factors affecting their diversity and distribution for sustainable management in the Kalfou Forest Reserve (KFR) and its periphery. Two methods were used for sampling, linear strip transects from which direct counts and indirect observations were made and the mist netting to complement the first. In total, 2525 birds were observed, including 149 species, belonging to 20 orders and 55 families. Accipitridae had the greatest number of species (11). The species richness was greater in the KFR (117 species) compared to the periphery (95 species). The specific richness was higher in wooded savannah compared to other habitats. Shannon index was significantly higher in the KFR (3.99) compared to that obtained in the periphery (3.80). The value of the Simpson index was higher on the outskirts of the KFR than on the periphery. The indices of species diversity were greater in the wooded savannah compared to other vegetation types. The seasons had no influence on bird diversity. Among the human activities encountered, the pressure indices were more important for grazing (7.3 contacts/km). Human activities have resulted in a significant decrease in specific richness. Six endangered species were encountered, four belonging to the Accipitridae family. The greater bird diversity in the reserve compared to the periphery shows that protected areas are a long-term solution for biodiversity conservation.展开更多
Results of the field work in recent years reveal that the Taolimiao-Alashan Nur is of specific significance to the survival of the Relict Gull Ordos subpopulation while the wetland birds occurring there represent conc...Results of the field work in recent years reveal that the Taolimiao-Alashan Nur is of specific significance to the survival of the Relict Gull Ordos subpopulation while the wetland birds occurring there represent concentratedly and indicatively the characteristics of the wetland bird community in desert of Ordos;as in July of 1992 China became the contract nation of the Convention on Wetlands of International Importance especially as Waterfowl Habitat (The Ramsar Convention),the study also presents an assessment on the wetland habitat of the T-A Nur following the Criteria recommended by the Convention and suggests that the T-A Nur following the relevant articles/items of the Criteria might be considered as an important wetland locality in China and hence to be listed on List of Wetlands of International Importance.展开更多
In recent years, global warming, drought and little rain, forest fires, forest destruction and other human disturbances have had an important impact on the habitat environment of birds, affecting the number and qualit...In recent years, global warming, drought and little rain, forest fires, forest destruction and other human disturbances have had an important impact on the habitat environment of birds, affecting the number and quality of bird habitats, directly threatening the survival and reproduction of birds, leading to a sharp decline in the diversity of bird species. In this study, the PKK National Park (18䓎' - 18䓠'N;102䓦' - 102䓻'E), Laos was used as a research site. The birds and their habitats in the park were used as research objects. The species, quantity and distribution of birds were investigated. In addition, the distribution of vegetation and the relationship between bird’s community and habitat types in PKK National Park were studied. Species diversity and Abundance of birds at PKK National Park, was monthly assessed by point count method between January and December 2018. A total of 117 species of birds belonging to 43 families and 18 orders were found in the inspection areas. Among them, Passerine birds (60 species) and Non-Finches (57 species) were almost equal to each other, accounting for 51.3% and 48.7% of total birds species respectively. Again, Anseriformes birds account for the largest number amongst Non-Passeriformes, reaching 15 species, followed by Falconiformes, accounting for 20.5% of total. On the other hand, based on migratory habits, resident birds were found to be highest in our research site which account for 35.04% of total birds and followed by Summer Migratory birds (32.28%), Passage Migrant (23.93%) and Winter Migratory birds (6.83%). Through the quantitative measurement and analysis of various parameters, the focus is on the diversity of birds and species in the park. Further, the factors that can affect species diversity, especially the bird’s survival factors such as vegetation change pattern, transformation rate of green areas, recruitment and restoration pattern of wild animals, especially birds, and other beneficial animal populations were also emphasized in our study. Over and above, exploring the scientific basis for the construction of the green space system of the PKK National Park in Laos with reasonable structure, complete functions and ornamental values was in the heart of this research.展开更多
文摘The Far North Region of Cameroon is home to a great diversity of bird species, which unfortunately remains very little explored. This work was initiated to establish an inventory of birds and the factors affecting their diversity and distribution for sustainable management in the Kalfou Forest Reserve (KFR) and its periphery. Two methods were used for sampling, linear strip transects from which direct counts and indirect observations were made and the mist netting to complement the first. In total, 2525 birds were observed, including 149 species, belonging to 20 orders and 55 families. Accipitridae had the greatest number of species (11). The species richness was greater in the KFR (117 species) compared to the periphery (95 species). The specific richness was higher in wooded savannah compared to other habitats. Shannon index was significantly higher in the KFR (3.99) compared to that obtained in the periphery (3.80). The value of the Simpson index was higher on the outskirts of the KFR than on the periphery. The indices of species diversity were greater in the wooded savannah compared to other vegetation types. The seasons had no influence on bird diversity. Among the human activities encountered, the pressure indices were more important for grazing (7.3 contacts/km). Human activities have resulted in a significant decrease in specific richness. Six endangered species were encountered, four belonging to the Accipitridae family. The greater bird diversity in the reserve compared to the periphery shows that protected areas are a long-term solution for biodiversity conservation.
文摘Results of the field work in recent years reveal that the Taolimiao-Alashan Nur is of specific significance to the survival of the Relict Gull Ordos subpopulation while the wetland birds occurring there represent concentratedly and indicatively the characteristics of the wetland bird community in desert of Ordos;as in July of 1992 China became the contract nation of the Convention on Wetlands of International Importance especially as Waterfowl Habitat (The Ramsar Convention),the study also presents an assessment on the wetland habitat of the T-A Nur following the Criteria recommended by the Convention and suggests that the T-A Nur following the relevant articles/items of the Criteria might be considered as an important wetland locality in China and hence to be listed on List of Wetlands of International Importance.
文摘In recent years, global warming, drought and little rain, forest fires, forest destruction and other human disturbances have had an important impact on the habitat environment of birds, affecting the number and quality of bird habitats, directly threatening the survival and reproduction of birds, leading to a sharp decline in the diversity of bird species. In this study, the PKK National Park (18䓎' - 18䓠'N;102䓦' - 102䓻'E), Laos was used as a research site. The birds and their habitats in the park were used as research objects. The species, quantity and distribution of birds were investigated. In addition, the distribution of vegetation and the relationship between bird’s community and habitat types in PKK National Park were studied. Species diversity and Abundance of birds at PKK National Park, was monthly assessed by point count method between January and December 2018. A total of 117 species of birds belonging to 43 families and 18 orders were found in the inspection areas. Among them, Passerine birds (60 species) and Non-Finches (57 species) were almost equal to each other, accounting for 51.3% and 48.7% of total birds species respectively. Again, Anseriformes birds account for the largest number amongst Non-Passeriformes, reaching 15 species, followed by Falconiformes, accounting for 20.5% of total. On the other hand, based on migratory habits, resident birds were found to be highest in our research site which account for 35.04% of total birds and followed by Summer Migratory birds (32.28%), Passage Migrant (23.93%) and Winter Migratory birds (6.83%). Through the quantitative measurement and analysis of various parameters, the focus is on the diversity of birds and species in the park. Further, the factors that can affect species diversity, especially the bird’s survival factors such as vegetation change pattern, transformation rate of green areas, recruitment and restoration pattern of wild animals, especially birds, and other beneficial animal populations were also emphasized in our study. Over and above, exploring the scientific basis for the construction of the green space system of the PKK National Park in Laos with reasonable structure, complete functions and ornamental values was in the heart of this research.
