从巴西的大豆生产概况入手,分析了巴西大豆的生产区域分布、收获面积、总产量和单产的变化趋势,总结了巴西的大豆科研体系情况,从文献计量的角度分析1995—2013年巴西大豆相关研究的论文数目、发文机构、发文作者、载文期刊、学科分布...从巴西的大豆生产概况入手,分析了巴西大豆的生产区域分布、收获面积、总产量和单产的变化趋势,总结了巴西的大豆科研体系情况,从文献计量的角度分析1995—2013年巴西大豆相关研究的论文数目、发文机构、发文作者、载文期刊、学科分布及论文引用等科研产出情况,并且采用Cite Space III软件分析巴西大豆研究的前沿领域。希望能从巴西的大豆生产和科研布局中获得启发,更好地提高中国大豆产业的国际竞争力。展开更多
Diverse conservation efforts have been expanding around the globe, even under the stress of increasing agricultural production. A striking example is the supply-chain agreements put upon the Amazon forest which had re...Diverse conservation efforts have been expanding around the globe, even under the stress of increasing agricultural production. A striking example is the supply-chain agreements put upon the Amazon forest which had reduced deforestation by 80% from the early 2000s （27,772 km2） to 2015 （6207 km2）. However, evaluation of these conservation efforts usually focused on the impacts within the Amazon biome only, while the effects that spill over to other areas （e.g., displacement of environmental pressure from one area to another） were rarely considered. Ignoring spillover effects may lead to biased or even wrong conclusions about the effectiveness of these conservation efforts because the hidden cost outside the target area of conservation may offset the achievement within it. It is thus impor- tant to assess the spillover effects of these supply-chain agreements. In this study, we used the two supply-chain agreements （i.e., Soy Moratorium and zero-deforestation beef agree- ment） implemented in the Amazon biome as examples and evaluated their spillover effects to the Cerrado. To achieve a holistic evaluation of the spillover effects, we adopted the telecou- piing framework in our analysis. The application of the telecoupling framework includes the interactions between distant systems and extends the analytical boundaries beyond the sig- natory areas, which fill the gap of previous studies. Our results indicate that the supply-chain agreements have significantly reduced deforestation by half compared to projections within the sending system （i.e., Para State in the Amazon, which exports soybeans and other agricultural products）, but at the cost of increasing deforestation in the spillover system （i.e., a 6.6 time increase in Tocantins State of the Cerrado, where deforestation was affected by interactions between the Amazon and other places）. Our study emphasizes that spillover effects should be considered in the evaluation and planning of conservation efforts, for which the telecoupling framework works as a useful tool to do that systematically.展开更多
文摘从巴西的大豆生产概况入手,分析了巴西大豆的生产区域分布、收获面积、总产量和单产的变化趋势,总结了巴西的大豆科研体系情况,从文献计量的角度分析1995—2013年巴西大豆相关研究的论文数目、发文机构、发文作者、载文期刊、学科分布及论文引用等科研产出情况,并且采用Cite Space III软件分析巴西大豆研究的前沿领域。希望能从巴西的大豆生产和科研布局中获得启发,更好地提高中国大豆产业的国际竞争力。
基金US National Science Foundation Award,No.1518518Complex Dynamics of Telecoupled Human and Natural System+1 种基金Michigan AgBioResearchSao Paulo Research Foundation,No.15/25892-7
文摘Diverse conservation efforts have been expanding around the globe, even under the stress of increasing agricultural production. A striking example is the supply-chain agreements put upon the Amazon forest which had reduced deforestation by 80% from the early 2000s （27,772 km2） to 2015 （6207 km2）. However, evaluation of these conservation efforts usually focused on the impacts within the Amazon biome only, while the effects that spill over to other areas （e.g., displacement of environmental pressure from one area to another） were rarely considered. Ignoring spillover effects may lead to biased or even wrong conclusions about the effectiveness of these conservation efforts because the hidden cost outside the target area of conservation may offset the achievement within it. It is thus impor- tant to assess the spillover effects of these supply-chain agreements. In this study, we used the two supply-chain agreements （i.e., Soy Moratorium and zero-deforestation beef agree- ment） implemented in the Amazon biome as examples and evaluated their spillover effects to the Cerrado. To achieve a holistic evaluation of the spillover effects, we adopted the telecou- piing framework in our analysis. The application of the telecoupling framework includes the interactions between distant systems and extends the analytical boundaries beyond the sig- natory areas, which fill the gap of previous studies. Our results indicate that the supply-chain agreements have significantly reduced deforestation by half compared to projections within the sending system （i.e., Para State in the Amazon, which exports soybeans and other agricultural products）, but at the cost of increasing deforestation in the spillover system （i.e., a 6.6 time increase in Tocantins State of the Cerrado, where deforestation was affected by interactions between the Amazon and other places）. Our study emphasizes that spillover effects should be considered in the evaluation and planning of conservation efforts, for which the telecoupling framework works as a useful tool to do that systematically.
