江西赣江源自然保护区森林涵养水源和净化水质及保育土壤价值核算

赣江源自然保护区是以保护中亚热带常绿阔叶林生态系统为主的自然保护区,涵盖江西的石城、瑞金二县市。流域面积161.008 5 km2。赣江是江西省的母亲河,流域面积83 500 km2,占全省国土面积的48%,保护赣江源区的森林环境资源,对江西经济社会的发展,具有重要的战略和现实意义。     

林地小气候效应及对4种主要害虫的影响

根据2003年6～9月林地小气候观测资料，以统计方法分析了上海夏季林地典型天气下小气候要素的日变化特征和林地降温增湿效应，分析了气象环境生态指标对林地主要害虫的影响。结果表明，林地02：00时气温和一定相对湿度持续日数与杨白潜蛾、杨小舟蛾、淡剑夜蛾及茶长卷叶蛾的发生量相关显。     

Horizontal and vertical distribution of Dolichopodidae (Diptera) in a woodland ecosystem

The horizontal and vertical distribution of dolichopodid flies in a deciduous woodland ecosystem was investigated by means of white-water traps during a nearly 8-month period. Eighteen traps were installed along a light intensity/soil humidity gradient (three zones) and from 0 to 80cm high (six levels). Six environmental features were recorded on several occasions. The dolichopodid data were analysed by means of two multivariate techniques, detrended correspondence analysis (DCA) and two-way indicator species analysis (TWINSPAN). The DCA revealed four distinct species groups, which also proved to be clearly different on a broader ecological basis. The horizontal distributions in many species could be explained by the different environmental conditions in the zones. Although nearly all species were unequally distributed over the traps, their stratification patterns generally showed no significant correlation with the recorded biotic and abiotic features. It is therefore suggested that the observed vertical distributions are the results of a combination of specific and environmental characteristics.     

江西赣江源自然保护区林地、立木价值核算

2009年,江西省政府先后出台关于设立"五河一湖"及东江源头保护区的通知和加强"五河一湖"及东江源头环境保护若干意见的2个重要文件。这是为了贯彻落实科学发展观,加快推进鄱阳湖生态经济区建设,实施生态立省,绿色发展,和谐发展,可持续发展战略的必然要求。赣江源自然保护区是以保护中亚热带常绿阔叶林生态系统为主的自然保护区,涵盖江西的石城、瑞金二县市,流域面积161.008 5 km2。赣江是江西省的母亲河,流域面积83 500 km2,占全省国土面积的48%,保护赣江源区的森林环境资源,对江西经济社会的发展,具有重要的战略和现实意义。选择"五河一湖"中第一大河—赣江源自然保护区的森林资源,运用年金资本法、收益现值分段法进行价值核算。其价值又分直接价值(林地、立木价值)和间接价值(生态价值)。因受篇幅限制,生态价值待后发表。经核算源区年林地、立木价值为3.831 6亿元。