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
Background:The aim of the study was to explore the ecological diversity of wild birds in Siberia, which are the natural reservoir of avian influenza virus(AIV).Methods:Cloacal swabs and intestinal fragments were colle...Background:The aim of the study was to explore the ecological diversity of wild birds in Siberia, which are the natural reservoir of avian influenza virus(AIV).Methods:Cloacal swabs and intestinal fragments were collected from wild migratory birds from 2007-2014. Isolated viruses were grown in the allantoic cavity of embryonated chicken eggs. The presence of virus was determined using hemagglutination assays. Primary identification and subtyping of influenza viruses was confirmed by RT-PCR.Results:A total of 2300 samples obtained from wild migratory birds of 8 orders were collected and tested. Influenza was detected in 185 birds of 3 orders. Species of family Anatidae(order Anseriformes) such as European Teal(Anas crecca), Garganey Teal(A. querquedula), and Shoveler(A. clypeata) play the main role in AIV circulation in the south of Western Siberia. The proportion of viral carriers among waterfowl ranged from 5.6 to 20% in 2007-2014. The order Charadriiformes had lower virus isolation rates of not more than 1.4%.Conclusions:Wild migratory waterfowl of orders Anseriformes and Charadriiformes are the main reservoir of AIV in the south of Western Siberia. This area plays a key role in persistence, evolution, and geographical distribution of avian influenza.展开更多
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Background:The aim of the study was to explore the ecological diversity of wild birds in Siberia, which are the natural reservoir of avian influenza virus(AIV).Methods:Cloacal swabs and intestinal fragments were collected from wild migratory birds from 2007-2014. Isolated viruses were grown in the allantoic cavity of embryonated chicken eggs. The presence of virus was determined using hemagglutination assays. Primary identification and subtyping of influenza viruses was confirmed by RT-PCR.Results:A total of 2300 samples obtained from wild migratory birds of 8 orders were collected and tested. Influenza was detected in 185 birds of 3 orders. Species of family Anatidae(order Anseriformes) such as European Teal(Anas crecca), Garganey Teal(A. querquedula), and Shoveler(A. clypeata) play the main role in AIV circulation in the south of Western Siberia. The proportion of viral carriers among waterfowl ranged from 5.6 to 20% in 2007-2014. The order Charadriiformes had lower virus isolation rates of not more than 1.4%.Conclusions:Wild migratory waterfowl of orders Anseriformes and Charadriiformes are the main reservoir of AIV in the south of Western Siberia. This area plays a key role in persistence, evolution, and geographical distribution of avian influenza.
