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Vegetation restoration was an effective approach of ecosystem rehabilitation in karst area. Selecting tree species well adaptive to karst environment and ascertaining their ecophysiological traits had a vital significance. We investigated photosynthetic diurnal changes of the dominant species Cinnamomum burmanii in the four seasons on the karst hill. Both the main photosynthetic parameters, such as...
Cyanobacterial blooms were thought to be initiated by increased availability of phosphorus (P), alkaline phosphatase(AP) play a crucial role in P metabolism. Anabaena FACHB709, a species closely relative to cyanobacterium Anabaena flos-aquae has well-established genetic manipulation system, we have chosen this organism as a model to characterize four genes predicted to encode alkaline phosphatases...
The study on spatial evolution of urban landscape pattern can provide a technical and decision-making support for the city's sustainable development. In the paper, based on the two remote sensing images in 1985 and 2002, the land utilization information of two different periods was gained with the auxiliary of the GIS and RS and the changes in land use were analyzed. In addition, quantitative analysis...
The vegetation, as one of positive factors for desertification control, has received extensive attention of scholars from different research fields. In this paper, the structure and dynamic characteristic of Ulmus pumila L. sparse forest in Horqin sandy land and Otindag sandy land were investigated. The results showed that Ulmus pumila L. sparse forest was monodominant community, and had simple structure...
The surveys on biodiversity characters were carried out with the methods of line transect from July to August 2010 in four types of habitats in Yellow River Wetlands in Shaanxi province. A total of 61 bird species belonging to 15 orders, 33 families were recorded. Among them, 1 species is rank I nationally protected birds, 2 species are rank II nationally protected birds, 4 species are included in...
Environmental forms of ecological harmony is not only the premise of the complex circulation of urban spatial form, but also the basic element of the realization of harmonious and livable cities. This paper attempts to start from the perspective of environmental form. On the basis of discussing the three organic recycling aspects of the representations of function, form, and spirit of the environmental...
The effect of environmental factors such as life styles pH and DO and temperature on the growth of tubificidae were discussed base on L. hoffmeisteri. The experimental results indicated that attached growth system is superior than suspension growth system for Tubificidae. The average growth rate was 0.466 g.g−1 and −0.242 g.g−1 respectively after three weeks culture. It is found that high DO concentration...
Pot experiments were conducted to investigate the effects of three different chelating agents(EDTA, citric acid, NTA) that intensify the absorption and accumulation of Cu, Zn in vermicompost for Euchlaena Mexicana Schrad. The results indicated that chelating agents addition could inhibit the growth of Euchlaena Mexicana Schrad, and the inhibition on the roots is greater than the shoots. At the same...
Airborne microorganisms in four different units (rack chamber, aeration tank, sludge thickening tank and sludge dewatering facility) in certain wastewater treatment plant in Beijing were chosen as research object and their distribution characteristics were studied. Results showed that the concentrations of heterotrophic bacteria and fungi in different units had significant differences. The aeration...
The idea of “Negative Planning” is just brought forward for the shortage of current developmental position of city and traditional urban planning for our country. It claims that it should be first to plan the ecology infrastructure of the region and establish a secure Patten for landscape, then distributing all kinds of urban land for construction base on it. This article attempts to “Negative Planning”...
In the process of rapid urbanization, due to the backward ideas and unscientific planning, historical and cultural heritage is being destroyed to varying degrees, with urban features being disappearing and many misconceptions on ecological construction, and the key is to find out relationships among the three of renewal, conservation and ecology. This paper firstly discusses the relationship between...
Terrestrial distribution with soil bacteria, fungi and actinomycetes amount of the Xilin River natural wetland was investigated. The result that soil microbial community compositions of typical grasslands and natural wetlands, with the elevation changes gradually reduce the soil moisture content from bed sludge (HX) to typical steppe (DT), changed significantly. The total microbial and aerobic bacteria...
Between the year 2005 and 2007, the authors monitored the habitat of golden monkey (Rhinopithecus roxellana) with the geography information system, remote sensing and global position system. We record the transect, altitude, forest canopy cover, the height of the tree, slope. Vanderloeg and Scavia selective index was used to evaluate the golden monkey's selection for varied habitat parameter. Through...
[Purpose]Soil moisture is a main limiting factor to influence vegetation restoration in loess plateau. Studying the impact of environmental factors on spatial distribution of soil water resource from regional scale can make it easier to understand the relationship between vegetation restoration and eco-environment construction, which can provide theoretical basis about soil water resource effective...
16 kinds of the priority polycyclic aromatic hydrocarbons (PAHs) were tested with the gas chromatography after pre-treatment to the soil sample from the topsoil (0 ∼ 20cm) in Jiaozuo through grid-sampling. 12 kinds of PAHs were detected at soils in the study area, whose total content were in range of 7.766 ∼ 69.893µg/kg and average value were 34.993µg/kg. In addition to, Bbf, Baa, Fla, and Chr owning...
On the base of a large numbers of related-references, the paper introduces the development's background of landscape river home and abroad, then starts from the the basic concept of ecological river landscape, investgates the feature and role of ecological river landscape in Tianjin Airport Industial Zone. We take examples of related research and practical experiences abroad, and point out the existing...
The pitting breaking potential (Eb) and repassivation potential (Ep) of 304 stainless steel were studied by electrochemistry method. These potentials were highly affected by the concentration of chloride solution, pH and buffer capacity, which defined as environmental factors. The buffer capacity and the concentration of non-aggressive anions in the solutions show some effects on the pitting initiation...
a pure culture of Chlorella vulgaris or Prococentrum lima, commonly found in the ship ballast water, was exposed to low-pressure (LP) UV lamps. Irradiated pure culture suspension was subsequently incubated for 10 days under white light fluorescent lamps. During incubation, cell density, absorbance and relative fluorescence intensity were analyzed. The results show that the growth of C.vulgaris and...
Many aquatic animals can release signal pheromones when attacked by predator. This chemical cue can be recognized by the conspecifics, and then the conspecifics will respond with anti-predator behaviour. In our experiment, we used freshwater shrimp (Macrobrachium nipponense) as research objection and studied whether it could recognized the chemical cues coming from injured-conspecific. Tub water of...
As an ecological process, soil erosion which endangers human existence and development has been one of environmental problem around the world for a long time. Affected by various environmental factors, soil erosion risk has obvious spatial distributions. Taked the Zhu River small watershed of red eroded area of South China as an example, selected the five risk factors of rainfall erosion, terrain...
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