To explore the effects of population, income level, policy and technology on Chinese urban household energy consumption, based on the extension of STIRPAT model, we assess the effects of factors using provincial panel data of China from 2000 to 2013. The results showed that: 1% changes in the growth rate of urban life energy intensity, urban residents consumption, per capita disposable income, urbanization rate, total population, and comprehensive policy efforts may cause 0.932 2%, 0.853 7%, 0.559 2%, 0.599 8%, 0.408 0%, and -0.0120% changes in the growth rate of urban household energy consumption. In addition to the negative effect of energy conservation policy, the other five factors have a positive effect on the growth of household energy consumption. Among them, the energy intensity of life has the greatest impact on the urban household energy consumption, while the government’s energy policy has inhibitory action in the growth of urban household energy consumption, although it’s weak. The government should continue to strengthen the implementation of energy conservation policies, so as to achieve energy-saving emission reduction in the field of domestic energy consumption.

The non-vessel operating common carrier (NVOCC) has important practical significance for the efficient operation of the international circulation of goods and the social and economic system in the region. We chose the list of the China’s NVOCC in 2006-2013 as the study samples to describe and analyze the spatial features of the NVOCC in China from the spatial scales of region, province and city, and to explore the dynamic mechanisms of spatial disparities. The results showed that there are obvious spatial distribution disparities among the NVOCC in China. The coastal region has more logistics companies than inland region, the eastern region also has obvious larger number than northeast and central western regions, the southeast coastal provinces especially Shanghai and Guangdong have the most companies. The spatial disparity of NVOCC distribution among the cities seems to be more significant, showing clear separation of aggregation regions and sparse regions. In the time dimension, the total number of China’s NVOCC and the number of cities with NVOCC are increasing, but there are differences in the inter regional transfer rate. The results suggestes that comprehensive transport network, the level of regional economic development and industrial structure, regional foreign trade relations and business support are the important driving forces to explore the formation mechanism of the China’s NVOCC.

Key words：NVOCC; spatial pattern; concentration; China

In order to analyze the evolution characteristics of planting structure in mountainous area, the main driving factors of planting structure, and to formulate regulation pathways of planting structure, the C-PCA coupling model (typical principal component analysis) was used in this paper to analyze the 15 driving factors of plant structure evolution from 1949 to 2013 in Guizhou Province. The results showed that: (1) The planting structure of 1949-2013 in Guizhou Province was gradually transformed to market oriented, with the proportion of economic crops increased and the proportion of grain crops decreased, and the growth rates of grain crops and economic crops were 7.24% and 2.95%, respectively; (2) The contribution rate of C-PCA coupling model showed that the main driving factors of plant structure evolution are total population, urbanization level, storage and transportation proportion, average annual temperature, annual precipitation and agricultural population proportion, and their corresponding cumulative contribution rate is 86.04%; (3) To  regulation the cropping structure in mountainous  area, both high efficient agriculture, and large data and cloud platform are needed to realize the sustainable development of agriculture and provide important support for the development of agricultural economy in mountainous  area.

Key words：mountainous; planting structure; driving force; C-PCA;  regulation pathways

Excessive input of nitrogen and phosphorus is always the main problem in the Taihu Lake basin, and it is important to cut the nitrogen and phosphorus loading from the catchment and control the water quality in the inflow rivers efficiently. The TN and TP standards in national surface water environmental quality standards of China (GB3838-2002) have discrepancy between rivers and lakes. That is, the lack of the TN standard for rivers and the inconformity between the TP standard for rivers and lakes. Thus, the pollutant control objective in lake is difficult to meet by restricting the nutrient input from rivers under nowadays’ guideline. This paper took the northwest of the Taihu Lake and its inflow rivers as case study and used the BATHTUB model to simulate the correspondence between the concentrations of TN and TP in the inflow rivers and lakes. Then a plan to revise the nitrogen and phosphorus control was proposed for the inflow rivers in the northwest of the Taihu Lake. The modeling results showed that: 1. If the inflow rivers implement the TP standard for rivers in the GB3838-2002, the TP concentration in lake would exceed its own standard and couldn’t achieve the environmental goals. 2. Provided the inflow rivers implementing the TN and TP standards for lakes in the GB3838-2002, the associated TN and TP concentrations in the lake could fulfill their environmental goals in GB3838-2002. However, this plan is lack of practical significance due to the poor water quality background in the Taihu Lake. 3. If the TN and TP concentrations for inflow rivers are inferred according to each environmental goal for lakes in the GB3838-2002, the result is more practical to implement and could guarantee the water quality in the lake. Our results may give a reference to the revise of nitrogen and phosphorus standards for inflow rivers and then the water quality in the northwest of the TaihuLake can be improved.

Key words：BATHTUB; the Taihu Lake; inflow rivers; TN;TP; water quality standard

Under the background of rapid social and economic development in our country, the continuous progress of urbanization has led to the decrease of urban ecological patches, the ecological and environmental problems are increasing year by year. The construction of ecological networks can link the original ecological patches to improve the urban ecological environment with the service function of one of the effective ways. Based on the MSPA and the landscape index method, the ecological source of the ecological network is extracted and the comprehensive resistance surface is constructed based on the MCR model. The minimum cost path method was applied to generate potential corridors, and then based on the gravity model, the degree of intermediary center and other key corridors and stepping stone plaque was identified and extracted to build the potential ecological network of the study area. The results showed that the MSPA method can be combined with the MCR, and the potential ecological corridor of the study area can be identified by quantitative analysis, and the stepping stone patches are selected according to the mediating effect of patches. The protection of landscape elements in the study area is clear. The potential ecological source and corridor in the landscape as the main basis for the construction of ecological network can provide scientific guidance for the construction of ecological network in Yujiang County, and also provide reference for other regions.

Key words：MSPA; MCR; ecological networks; landscape connectivity; Yujiang county

Delineation of aquatic ecoregion is the foundation of“zoning, grading, staging and classification”management of water environment in river basin．With the elevation, 
drought degree, the average annual runoff as the level I delineation indicator, land use, soil type, slope, the per capita GDP as the level II delineation indicator, the water 
source area of the Danjiangkou Reservoir was divided into 6 level I aquatic ecoregions and 19 level II aquatic ecoregions. Comparison of different ecoregions in aquatic habitat  conditions and  community  structure of zoobenthos, significant differences were found. Though some habitat indicator was similar between different second ecoregions, there were 
significant differences in the community structure of zoobenthos, which suggests that the delineation scheme is scientific and reasonable, and should be a good idea for the  cosystem protection and water resources management of  the water source area of the Danjiangkou Reservoir.
Key words：aquatic ecosystem; ecological function regionalization; water resource;  water source area of Danjiangkou