转机建制增活力 改革创新谋发展--大兴安岭林业集团公司西林吉林业局林场改革情况调查

林场改革是大兴安岭实施生态保护工程 ,落实“四大战役”的一项重要工作。西林吉林业局立足转换经营机制 ,以深化改革、减负增盈为重点 ,以活化企业机制为目的 ,实施整体规划、分步实施、因场施策、全面搞活的改革     

Bits and pieces: Forest fragmentation by linear intrusions in India

Linear infrastructure development is an important driver of forest fragmentation leading to habitat and biodiversity loss as well as disruption of critical ecosystem processes. The tropical forests of India are increasingly impacted by infrastructure development. Little quantitative information is available on the extent of fragmentation due to linear infrastructure on these habitats. Here, we quantified fragmentation due to linear infrastructure by studying forest structural connectivity. We compared the existing forest patch characteristics with a scenario that excluded all linear infrastructure. We classified forest patches into three different fragmentation categories that combined information on patch size, inter patch distance and percentage perforations. Results show that power-transmission lines and roads were the most common infrastructure features within forests. We found a 6% increase in the number of forest patches due to the construction of linear infrastructure. Forest patches >10,000 km² in size were severely affected and there was a 71.5 % reduction in the number of such patches. We found that 86 % of the existing forest patches are in the small (median patch size <1 km²) and isolated (a median distance of 155 m) category. The density of linear infrastructure inside protected areas was similar to density in non-protected forested areas. Our results highlight the need to minimize the effects of fragmentation in the future by considering re-routing or bundling of infrastructure. When infrastructure is unavoidable, there is a need to mitigate their potential impacts. The results of this study have been made publicly accessible (https://indiaunderconstruction.com) to provide information on 'where' to avoid future linear infrastructure development and to make informed decisions which can lead to optimally designed local management plans.     

Forest transition in South Korea: Reality, path and drivers

While forest transition (FT) in South Korea began in 1955, when forest cover was only 35% of national land area, significant increases in both forest cover and growing stock really occurred in the early 1970s. Using reconstructed historical records, we empirically demonstrate that (1) FT in South Korea was mainly accomplished by the recovery of degraded, non-stocked forest; and (2) one-dimensional FT analysis using forest area alone has severe limitations in diagnosing meaningful changes in forest sustainability. The key driver of FT in South Korea was the government-led reforestation policy. The comprehensive reforestation plans, started in 1973, not only provided economic incentives to the general public by establishing clear quantifiable goals, they also promoted inter-agency cooperation and coordination, especially between the energy and forest sectors, to replace firewood with fossil fuels. These government-led efforts, accompanied by rural-urban migration, brought an increase in stocked forest area and a complementary rising average growing stock level. The case of South Korea shows that FTs can be cultivated in a relatively short period of time by a central authority, even with imperfect governance and low economic development.     

北京生态林补偿制度:背景、进展及设想

通过对北京市生态林补偿机制的背景、进展、评价及其他情况的论述,提出了北京生态林补偿制度的设想,并结合生态补偿制度和生态力评价,分析了如何构建、完善生态林补偿制度。     

政策管制、潜规则与林农收益的获得性研究——中南集体林区案例

近年来,在发展实践和研究领域使用获得性分析范式来解释农民增收的影响因素比产权分析有更强的解释力。使用获得性分析范式分析了政策管制和潜规则对林农收益获得性的影响。研究发现:政策管制对林农获取林业收益的获得性有不利影响;由于政策管制在地方的适应性较低而使得地方的利益受损者发展潜规则来抵制政策。林农也通过潜规则来增强获得性,同时也在这个过程中因为其它利益主体发展的潜规则而间接获得收益,另一方面,在潜规则背景下,林农的利益始终无法得到合法和合理的保障,林农的利益被过大的交易成本和社会成本所抵消,或因为中间商采取欺骗和市场垄断而受损。     

Risk Attitudes,Social Interactions,and the Willingness to Pay for Genotyping in Dairy Production

Bovine Mastitis is one of the most prevalent and costly production diseases in the dairy industry in Canada and worldwide causing major animal welfare problems, environmental problems, and productivity losses. In this paper, we examine the effects of risk attitudes and social interactions on the willingness to pay (WTP) for genotyping animals for susceptibility to a chronic mastitis trait. We use contingent valuation with double bounded dichotomous choice questions to elicit producers’ WTP. The estimated mean WTP for genotyping is approximately $50 per animal. Compared to the current market prices of commercially available comprehensive genotyping services, this estimate suggests a significant market potential for genotyping to be bundled with economically important disease traits. We also find evidence that both risk attitudes and social interactions have strong effects on the WTP for genotyping. Farmers with higher risk tolerance are willing to pay more for genotyping service. For dairy farmers with more concern about mastitis, risk tolerance has no significant effect on the WTP, while social interactions have a significant effect on the WTP. We also find a strong interaction effect between risk tolerance and social interactions. The findings encourage interest in questions about how risk attitudes, social networks, and their interactions shape the adoption of and the WTP for a novel agricultural technology. La mastite bovine est la maladie de production la plus répandue et la plus coûteuse de l'industrie laitière au Canada et mondialement causant des problèmes en ce qui concerne le bien‐être des animaux, l'environnement et la perte de productivité. Cet article examine les effets de l'attitude à l′égard du risque et des interactions sociales concernant la volonté de payer pour le génotypage d'animaux pour le dépistage de la susceptibilité à posséder le trait de mastite chronique. L'évaluation contingente avec questions à double proposition dichotomique a été utilisée afin d'obtenir la volonté de payer des producteurs. La volonté moyenne estimée de payer pour le génotypage s'élève à approximativement 50 $ par animal. Comparée aux prix courants du marché pour les services commerciaux complets de génotypage, cette estimation suggère un potentiel commercial significatif pour grouper le génotypage à d'autres traits de maladie d'importance économique. Nous trouvons aussi trouvé que les attitudes à l′égard du risque et les interactions sociales avaient un impact significatif sur la volonté de payer pour le génotypage. Les fermiers démontrant une grande tolérance au risque sont disposés à payer plus pour les services de génotypage. Pour les producteurs laitiers préoccupés par la mastite, la tolérance vis‐à‐vis du risque n'a aucun effet sur la volonté de payer, tandis que les interactions sociales en ont une importante. Nous notons aussi un effet significatif d'interaction entre la tolérance pour le risque et les interactions sociales. Les résultats favorisent un questionnement au sujet des attitudes à l′égard du risque, des réseaux sociaux et de leurs interactions, cherchant comment ces derniers guideront l'adoption de nouvelles technologies agricoles et la volonté d'en acquérir.