Artificial light at night decreases leaf herbivory in typical urban areas.

Artificial light at night (ALAN) is exerting growing pressure on natural ecosystems, but its impact on biological interactions remains unclear. This study aimed to assess how ALAN influences leaf functional traits and herbivory in two prevalent street tree species ( (L.) Schott and ) through field surveys and paired experiments in the urban areas of Beijing, China.

[Scaling laws of altitudinal pattern of soil fauna diversity in Dongling Mountain, Beijing, China].

Identifying the complexity of diversity pattern of various taxa within a community is a challenge for ecologist. Scaling law is one of the suitable ways to detecting the complex ecological structure. In this study, we explored the scaling laws of soil fauna diversity pattern along an altitudinal gradient by multifractal analysis, and compared the difference of multifractal spectra between the litter and the soil layers.

[Research progress on the effects of urban road green space on dispersion of local air pollutant].

In recent years, the research on the effects of urban road green space on local pollutant dispersion has been quite active, with mounting empirical results. Due to the lack of summary and arrangement, however, it is difficult to effectively guide the practice of urban green space construction. In this review, the road and green belt research objects were classified.

[A review of air pollutant diffusion models for urban street].

Street is an important place for urban residents, and the air quality in streets is closely related to residents' health. Air pollutant diffusion model is an often used measure to simulate and evaluate air quality in street canyon in recent years, but the problems existing in model application need to be clarified. This review selected four air pollutant diffusion models, i.

[Content trends of pollutants in street dust of Beijing along the urban-rural gradient and road density gradient].

In the article, pollutant content of 220 road dust samples within the sixth ring road of Beijing have been investigated by using grid stationing sampling method. The changing characteristics of road nude number per unit area, road network density and pollutant content within buffering areas along urban to rural gradient were also studied. Three following variation trends are presented as each index varies widely within the research areas.

[Effects of altitude on soil microbial community in Quercus liaotungensis forest].

Taking the Quercus liaotungensis forest soil in Dongling Mountain of Beijing as the object, and by using chloroform fumigation-extraction and phospholipid fatty acid (PLFA) analysis methods, this paper studied the variation characteristics of soil microbial community along an altitudinal gradient in the tree growth season. With increasing altitude, the soil microbial biomass carbon and nitrogen and the quantities of various soil microbial groups in the forest had definite differences but not significant. The ratio of soil bacteria to fungi increased, but the ratio of G(+)- to G- bacteria decreased.

[Influence of soil moisture, nitrogen and phosphorus contents on Bauhinia faberi seedlings growth characteristics in arid valley of Minjiang River].

To study the influence of resources thresholds on plant growth is a major theme in restoration ecology. Based on the simulation of the natural thresholds of soil moisture, nitrogen (N), and phosphorus (P) under drought condition in the arid valley of Mingjiang River, a full factorial experiment was designed to study the dynamics of Bauhinia faberi seedlings survival rate, growth, biomass production, and resources use efficiency across one growth season. High soil moisture (40% field water capacity), high soil P (24 mg P x kg(-1)), and low N (100 mg N x kg(-1)) increased the seedlings survival rate, and promoted the seedlings growth, biomass production, and water use efficiency.

[L-THIA-based management design for controlling urban non-point source pollution].

L-THIA Model was used to simulate the amounts of NPS pollutants in 2 catchments of Sanjiao watershed (Sj1, Sj2) in Hanyang district, and the total simulated amount of NPS loads in Sj1 and Sj2 were 1.82 x 10(4) kg, 1.38 x 10(5) kg, respectively.

[Spatio-temporal dynamics of nitrogen in agricultural ditch systems in Sanjiang Plain].

Agricultural drainage water sampling was conducted along ditch systems from 1st order to 5th order in Nongjiang River and Bielahonghe River during June to September, 2005. The spatio-temporal dynamics of nitrogen concentrations in agricultural ditch systems were analyzed. Results showed that there were higher concentrations of nitrogen in Bielahonghe ditch system.

[Main sources of urban non-point source pollution and control measures for classified catchments].

The change of land use and management practices is one of the most important factors that affecting water quality, proper land use management practices can improve water quality in a watershed. A stepwise regression model was used for finding the relationship between lake water quality and urban land use types, and rural residential, urban residential, commercial land and bottomland were determined as the main sources of non-point source pollution (NPS). The 17 catchments in the study area were clustered into 3 groups through land use types, representing rural residential, urban residential, commercial land and bottomland separately.

[Zoning planning in non-point source pollution control in Hanyang district].

It is most important for managing urban non-point source (NPS) pollution, actualizing the urban sustainable development as well, that zoning planning of urban NPS pollution control is studied. A case study on principles and methods of zoning planning in urban NPS pollution is carried out. Principles of urban sustainable development, priority of urban NPS pollution sensitivity, similarity of urban NPS control direction and region conjugate are put forward.

[Impacts of the urbanization on waters non-point source pollution].

Non-point source (NPS) pollution is the prominent source of water pollution in many countries, included America and China, of the world. Urban NPS pollution was attached little importance for long, compared with agriculture NPS pollution. While urbanization is the dominant form of land-use change in terms of impacts on water quality, the hydrology, other physical properties of watersheds as well as their NPS pollution potential at present.

[Research on the relationship between water and eco-environment construction in Loess Hilly and Gully regions].

Water is an important factor for eco-environmental construction. Eco-environmental construction has a great impact on water. There is a circular correlation between eco-environmental construction and water.

Characterising biocomplexity and soil microbial dynamics along a smelter-damaged landscape gradient.

Soil micro-organisms are an integral but often underestimated part of plant and soil ecosystems. Long-term industrial air pollution in the Sudbury, Ontario region has altered vegetation and soil, and therefore, possibly, soil microbial function. This study focuses on the historical pollution gradient resulting from a decommissioned smelter near Sudbury, and aims to determine the effect of contaminant concentrations (such as soil heavy metals) and environmental variables (such as soil moisture and vegetation cover) on soil microbial populations and diversity.

Comparing the soil quality changes of different land uses determined by two quantitative methods.

Soil quality is one of the most important environmental factors in sustaining the global biosphere and developing sustainable agricultural practices. A study was initiated in Wolong Nature Reserve, Sichuan Province, China to elucidate the soil quality changes of natural secondary succession, forest planting and agricultural practices after deforestation in the humid mountainous region. The soil qualities of six land use types (natural forestland, grassland, shrub land, secondary forestland, cultivated land and reforested land) were compared using two quantitative methods: the integrated soil quality index (QI) and soil deterioration index (DI).