Norman Conquest was the last foreign invasion suffered by England.This conquest served as a turning point,after which England was put on the way to becoming powerful.This change resulted from a series of reforms in te...Norman Conquest was the last foreign invasion suffered by England.This conquest served as a turning point,after which England was put on the way to becoming powerful.This change resulted from a series of reforms in terms of politics,religion and economy by the conqueror.The present paper attempts to trace these reforms.展开更多
Background: The global decrease in wildlife populations, especially birds, is mainly due to land use change and increasing intensity of land use(Parmesan and Yohe 2003). However, impacts of management tools to mitigat...Background: The global decrease in wildlife populations, especially birds, is mainly due to land use change and increasing intensity of land use(Parmesan and Yohe 2003). However, impacts of management tools to mitigate biodiversity loss at regional and global scales are less apparent in forest regions that have a constant forest area,and which did not suffer from habitat degradation, and where forests are sustainably managed, such as in Central Europe or the northeastern USA. A biodiversity assessment for Germany suggested, for example, that bird populations were constant(Bundesamt für Naturschutz 2015).Results: This study shows that changes in the environment and in forest management over the past 45 years have had a significant, positive effect on the abundance of non-migratory forest bird species in Central Europe. Economy(timber prices and GDP), forest management(timber harvest and mixed forest area), and environmental factors(atmospheric CO_2 concentration and nitrogen deposition) were investigated together with changes in abundances of migratory and non-migratory forest birds using partial least squares path modeling. Climate change, resulting in longer seasons and milder winters, and forest management, promoting tree diversity, were significantly positively related to the abundance of non-migratory forest birds and explained 92% of the variation in their abundance in Europe. Regionally-migrating forest birds had stable populations with large variation, while birds migrating across continents declined in recent decades, suggesting significant, contrasting changes in bird populations in Europe. In northeastern North America we also found evidence that non-migratory forests have experienced long-term increases in abundance, and this increase was related to management. The increase of populations of nonmigratory forest birds in Europe and North America is associated with an increase in structural diversity and disturbances at the landscape level.Conclusions: Our results suggest that reports about bird decline in forests should separate between migratory and non-migratory bird species. Efforts to mitigate the general decline in bird abundance should focus on land-use systems other than forests and support sustainable forest management independent of economic conditions.展开更多
PREMIER LI PENGAND VICE-PREMIERLI LANQING URGETHE IMPROVEMENTOF CCPIT’S WORK Premier Li Peng has pointed out thattrade promotion is an important part of China’sforeign economic and trade work.The ChinaCouncil for th...PREMIER LI PENGAND VICE-PREMIERLI LANQING URGETHE IMPROVEMENTOF CCPIT’S WORK Premier Li Peng has pointed out thattrade promotion is an important part of China’sforeign economic and trade work.The ChinaCouncil for the Promotion of InternationalTrade has contributed a lot to China’sdiplomatic and foreign trade developmentand enhanced understanding,friendship andcooperation between the Chinese people andthe peoples of other countries and regions.The CCPIT should better perform its workand play a more active role on the basis of itsexperience,he said.展开更多
文摘Norman Conquest was the last foreign invasion suffered by England.This conquest served as a turning point,after which England was put on the way to becoming powerful.This change resulted from a series of reforms in terms of politics,religion and economy by the conqueror.The present paper attempts to trace these reforms.
基金JR:German Research Foundation(FZT 118)Charles University(Primus/17/SCI/16)
文摘Background: The global decrease in wildlife populations, especially birds, is mainly due to land use change and increasing intensity of land use(Parmesan and Yohe 2003). However, impacts of management tools to mitigate biodiversity loss at regional and global scales are less apparent in forest regions that have a constant forest area,and which did not suffer from habitat degradation, and where forests are sustainably managed, such as in Central Europe or the northeastern USA. A biodiversity assessment for Germany suggested, for example, that bird populations were constant(Bundesamt für Naturschutz 2015).Results: This study shows that changes in the environment and in forest management over the past 45 years have had a significant, positive effect on the abundance of non-migratory forest bird species in Central Europe. Economy(timber prices and GDP), forest management(timber harvest and mixed forest area), and environmental factors(atmospheric CO_2 concentration and nitrogen deposition) were investigated together with changes in abundances of migratory and non-migratory forest birds using partial least squares path modeling. Climate change, resulting in longer seasons and milder winters, and forest management, promoting tree diversity, were significantly positively related to the abundance of non-migratory forest birds and explained 92% of the variation in their abundance in Europe. Regionally-migrating forest birds had stable populations with large variation, while birds migrating across continents declined in recent decades, suggesting significant, contrasting changes in bird populations in Europe. In northeastern North America we also found evidence that non-migratory forests have experienced long-term increases in abundance, and this increase was related to management. The increase of populations of nonmigratory forest birds in Europe and North America is associated with an increase in structural diversity and disturbances at the landscape level.Conclusions: Our results suggest that reports about bird decline in forests should separate between migratory and non-migratory bird species. Efforts to mitigate the general decline in bird abundance should focus on land-use systems other than forests and support sustainable forest management independent of economic conditions.
文摘PREMIER LI PENGAND VICE-PREMIERLI LANQING URGETHE IMPROVEMENTOF CCPIT’S WORK Premier Li Peng has pointed out thattrade promotion is an important part of China’sforeign economic and trade work.The ChinaCouncil for the Promotion of InternationalTrade has contributed a lot to China’sdiplomatic and foreign trade developmentand enhanced understanding,friendship andcooperation between the Chinese people andthe peoples of other countries and regions.The CCPIT should better perform its workand play a more active role on the basis of itsexperience,he said.
