Time filter

Source Type

Luo J.,Beijing Normal University | Cheng X.-Y.,Beijing Normal University | Yan X.,Beijing Normal University | Tao W.-Q.,Beijing Municipal Bureau of Landscape and Forestry | And 2 more authors.
Bulletin of Entomological Research | Year: 2012

Phosphoglucose isomerase (PGI) plays an important role in energy metabolism, and it is documented that PGI exhibits an extensive polymorphism which can affect insects' fitness and adaptation. In this paper, we studied the structural characteristics and polymorphism of pgi gene in the fall webworm (Hyphantria cunea), an important invasive pest in some European and Asian countries. A 2110-bp pgi full-length cDNA encoding a polypeptide of 556 amino acids was obtained from H. cunea. The pgi full-length in the H. cunea genomic DNA was 14,332 bp with 12 exons and 11 introns, similar to the structures of pgi in other Lepidoptera species. We compared the structures of pgi in different insect species. Moreover, thirteen pgi genotypes comprised of five alleles were identified in the Chinese population. Genotypes pgi-cd, pgi-cc and pgi-ce were the most prevalent with over 70% of individuals allocated to them. Four out of five alleles were sequenced the cDNA full-length. Thirty stably variable sites were found among them with five non-synonymous mutation sites. The frequencies of alleles and genotypes were variable in different Chinese geographic subpopulations. Moreover, comparison of pgi mRNA expression levels in each stage of the moth's lifecycle showed that a high expression level was in the 6th instar larval stage, followed by that in the egg and adult stages. The results will provide a basis for further study of the role of different alleles and genotypes of PGI on fitness and adaptation of the moth H. cunea. © 2012 Cambridge University Press.


PubMed | Beijing Normal University, Purdue University and Beijing Municipal Bureau of Landscape and Forestry
Type: Journal Article | Journal: Bulletin of entomological research | Year: 2014

Phosphoglucose isomerase (PGI) plays an important role in energy metabolism, and it is documented that PGI exhibits an extensive polymorphism which can affect insects fitness and adaptation. In this paper, we studied the structural characteristics and polymorphism of pgi gene in the fall webworm (Hyphantria cunea), an important invasive pest in some European and Asian countries. A 2110-bp pgi full-length cDNA encoding a polypeptide of 556 amino acids was obtained from H. cunea. The pgi full-length in the H. cunea genomic DNA was 14,332 bp with 12 exons and 11 introns, similar to the structures of pgi in other Lepidoptera species. We compared the structures of pgi in different insect species. Moreover, thirteen pgi genotypes comprised of five alleles were identified in the Chinese population. Genotypes pgi-cd, pgi-cc and pgi-ce were the most prevalent with over 70% of individuals allocated to them. Four out of five alleles were sequenced the cDNA full-length. Thirty stably variable sites were found among them with five non-synonymous mutation sites. The frequencies of alleles and genotypes were variable in different Chinese geographic subpopulations. Moreover, comparison of pgi mRNA expression levels in each stage of the moths lifecycle showed that a high expression level was in the 6th instar larval stage, followed by that in the egg and adult stages. The results will provide a basis for further study of the role of different alleles and genotypes of PGI on fitness and adaptation of the moth H. cunea.


Shen J.-Y.,Beijing Forestry University | Cui G.-F.,Beijing Forestry University | Liu R.-Z.,Beijing Municipal Bureau of Landscape and Forestry | Qu H.,Beijing Municipal Bureau of Landscape and Forestry | And 3 more authors.
Beijing Linye Daxue Xuebao/Journal of Beijing Forestry University | Year: 2016

To investigate the distribution of wildlife along the tourism routes in Beijing Songshan National Nature Reserve, 20 infrared cameras were set during November 2013 to November 2014. From the 1 558 pictures taken by the cameras, 35 species of wild animals were identified, including 12 mammals and 23 birds. The most common mammals captured were Sciurotamias davidianus, Arctonyx collaris, Meles meles and Prionailurus bengalensis, and the most common birds were Phasianus colchicus, Urocissa erythrorhyncha, Turdus naumanni and Myophonus caeruleus. Sus scrofa, a dangerous mammal, was pictured 9 times, mostly at night, which suggests a low threat to visitors'safety in the daytime, but a potential danger to camping tourists. The photographic rate (PR) varied at different elevations and months. The PR at low elevation was higher than that in middle and high elevations. The PR reached 53.64% in September and dropped to 3.71% in December. Besides, the frequency of occurrences differed in species and time bucket. The results indicate that the wild animals distribute in certain rules along the tourism routes. This paper also discusses the efficacy of monitoring wildlife resources around tourist lines by infrared cameras, which contributes to the tourists'security assurance and improves the ability of early warning and control. © 2016, Editorial Department of Journal of Beijing Forestry University. All right reserved.


Zhang B.,CAS Institute of Geographical Sciences and Natural Resources Research | Xie G.,CAS Institute of Geographical Sciences and Natural Resources Research | Xue K.,Beijing Municipal Bureau of Landscape and Forestry | Wang J.,Beijing Municipal Bureau of Landscape and Forestry | And 2 more authors.
Shengtai Xuebao/ Acta Ecologica Sinica | Year: 2011

As the world population increases, more and more people will live and work in cities. Urbanization involves replacement of vegetated surfaces by impervious surfaces; often causing an increase in the rate and volume of surface runoff of rainwater. Climate change may further increase these fluctuations and the flood risk. Beijing experiences rapid urbanization and the rapid urban extension alter natural hydrological processes. Urban green spaces have positive effects on infiltration and storage of water in the soil, resulting in run-off reduction, nutrient and pollutant removal, and improved groundwater quality. Therefore, urban green spaces in Beijing can play an important role in the water cycle, for the improvement of urban ecology and management. Although some studies found that the green areas in Beijing had positive impact on reduction of storm water runoff, only a few studies could reveal the economic or ecological benefits of rainwater storage by urban green spaces. To evaluate the benefits of rainwater storage by urban green spaces and to provide a reference point for the public and government organizations, we grouped rainwater storage into two ecosystem benefits: rainwater runoff reduction and rainwater purification. Based on inventory data of urban green spaces in Beijing (2009), the amount of rainfall runoff reduction was calculated by the rainwater runoff coefficient of different green types, the benefits of rainwater storage by green space were evaluated by the shadow price method of the unit cost for reservoir and price of reclaimed water. The results showed that, a total volume of 1. 54×10 8m 3 rainwater was conserved in these urban green spaces, which almost corresponds to the annual water needs of urban ecological landscape in Beijing, and 2494 m 3 of potential runoff was stored per hectare of green area. The total economic benefit was 1. 34 billion Yuan, which equals three quarters of the maintenance cost of green spaces in Beijing, and the monetary value of runoff storage was 21. 77 thousand Yuan per hectare. We also found that the benefits could be ranked by district or county in the same way as urban green areas, but the average benefits per hectare green spaces showed variable trends, which may be related to the varying ISI (Impervious Surface Index) with regions. To reduce the high runoff during rainfall and increase rainwater harvesting as an alternative water supply one constructs drainage facilities. This implies a greater financial burden and less water resources. Beijing could benefit from improved rainwater drainage through soft ground since the alternative of building and maintaining a storm water drainage system involves a high cost. Therefore, our research will contribute to realize the role that Beijing?s green spaces are playing in the regulation of rainwater, and to the construction and scientific management of urban green spaces. As our study has demonstrated, there are several lessons for policy, practice and research in order to develop new urban green spaces, enhancing the management effectiveness of existing green spaces, financial innovations to generate resources for sustainable management of green spaces, and local monitoring and local enforcement for effective governance of urban green spaces.


Zhang X.,Beijing Forestry University | Zhang H.-L.,Beijing Forestry University | Wang Y.-J.,Beijing Forestry University | Wang Y.-Q.,Beijing Forestry University | And 3 more authors.
Beijing Linye Daxue Xuebao/Journal of Beijing Forestry University | Year: 2016

Using Granier-type thermal dissipation probes, we monitored sap flux density (Fd) of three species (Cunninghamia lanceolata, Pinus massoniana, and Symplocas setchuensis) in August and September during 2012-2015 in Jinyun Mountain of Chongqing, southwestern China. Solar radiation (ES), atmospheric temperature (T), atmospheric relative humidity (RH), wind speed (W), vapour pressure deficiency (VPD) and soil water content (SWC) synchronously with Fd were monitored by mini weather station. Sunny day, cloudy day and rainy day were chosen as three typical weather conditions. We aimed to analyze the differences and characteristics of sap flow among three species and among the three typical weather conditions, and to clarify the relationship between Fd and meteorological factors. The results showed that water transpiration ability of xylem for the three species was ranked as S. setchuensis > P. massoniana > C. lanceolata. Transpiration velocity of broadleaf species was higher than that of coniferous species. The variations of Fd for the three species all displayed single-peaked curves. S. setchuensis was the first one to start transpiration and reach the peak value of Fd, while C. lanceolata was the last. Sap flow for the three species under different weather conditions followed the order of sunny day >cloudy day > rainy day. Compared with sunny day sap flow, the extent of sap flow decreased on cloudy and rainy days ranged from 41% to 86%. The order of contribution rate of diurnal sap flow to whole day transpiration was sunny day (94.74%-98.04%) > cloudy day (93.63%-96.71%) > rainy day (81.43%-85.43%), and that of nighttime sap flow contribution was rainy day (14.57%-18.27%) > sunny day (3.29%-6.37%) > cloudy day (1.96%-5.26%). SWC was the major factor affecting the nighttime sap flow contribution on rainy days. ES and VPD were major meteorological factors affecting Fd. W, T and RH had little effect on Fd, and there were some differences among these three species. The regression models to relate Fd with meteorological parameters can well explain the changes of sap flow, in which coefficients of determination were 0.873, 0.873 and 0.903. © 2016, Beijing Forestry University. All right reserved.


Gaodi X.,CAS Beijing Institute of Geographic Sciences and Nature Resources Research | Wenhua L.,CAS Beijing Institute of Geographic Sciences and Nature Resources Research | Yu X.,CAS Beijing Institute of Geographic Sciences and Nature Resources Research | Biao Z.,CAS Beijing Institute of Geographic Sciences and Nature Resources Research | And 5 more authors.
Chinese Geographical Science | Year: 2010

As the most important ecosystem in Beijing, the forest supports a lot of ecosystem services to local and around communities, which plays a key role in the maintenance of urban ecological security. However, the valuation on the forest ecosystem services based on regional scale could not provide precise and reasonable values for forestry sector management. In this study, we estimated the magnitudes and economic values of the forest ecosystem services in Beijing at sublot level. The economic value of forest ecosystem services in Beijing was estimated to be 19 339.71×106 yuan (RMB) in 2004. Among all the ecosystem services indicators we estimated in this study, only fruit, timber and part of the recreation (which only include the tourism income from the forest parks and scenic areas, but not include that from other forest types) were measured in the social economic system. As estimated in this study, more than 82.19% of the economic value of forest ecosystem services could not be measured in the socio-economic statistical system. The importance of forest ecosystem services in Beijing to human welfare was underestimated by the socio-economic system. Therefore, the policies about the eco-compensation of forest ecosystem services should be established to maintain the sustainable supply of the forest ecosystem services in Beijing. © Science Press and Northeast Institute of Geography and Agricultural Ecology.


Gao S.U.-W.,Beijing Municipal Bureau of landscape and forestry | Shao Y.,Chinese Academy of Forestry | Zhang M.-Y.,Chinese Academy of Forestry | Li W.,Chinese Academy of Forestry | And 4 more authors.
Wetland Science | Year: 2010

The wetland park, which is composed mainly by wetland landscape, can not only protect wetland ecosystems , but also be used for the scientific research and eco - tourism. It states that wetland park is an important part of wetland management system in Beijing. Wetlands are widely distributed in Beijing with different protection and management systems. Although many wetland parks were constructed spontaneously, the number of Wetland Park is not large enough for the actual need of Beijing. As it is a long - term strategy to strengthen ecological construction in Beijing and build a livable city, to equalize the distribution of the Beijing Municipal Wetland Park is necessary. The guidelines and principles, according to the overall layout of Wetland Park in Beijing and staging plan, point out the need to strengthen and standardize the management of present wetland constructions. At the same time, planning and constructing different levels, types and sizes of Wetland Park in Beijing is important. Moreover, attention needs to be paid to the details of planned wetland protection, wetlands restoration engineering, landscape construction, infrastructure construction and environmental protection project. It concludes by making suggestions to strengthen regulatory agencies, management systems, management facilities, management capacity building and the legal system to protect and improve the wetland management system, to expand investment and finance channels, establish the technology support system, and involve the community to build a series of safeguard measures.


Ma Q.,Chinese Academy of Forestry | Cui L.,Chinese Academy of Forestry | Song H.,Chinese Academy of Forestry | Zhang M.,Chinese Academy of Forestry | And 2 more authors.
Wetlands Ecology and Management | Year: 2015

Unsustainable use and inappropriate management of wetlands has a wide range of consequences for humans and the environment. These include the loss and degradation of wetland ecosystems with detrimental effects on species survival, water-storage capacity, and enhance the risk of decreased ecological functions. As the human population continues to grow, these problems are likely to increase in severity. To date, there are no law specifically designed to protect Beijing wetlands; existing regulations only relate to one or a few of the elements of wetlands. However, there has been great effort toward the establishment of legislation and a legal document is expected to be released in the near future. In this paper, we focus on the main obstacles in Beijing wetland protection and management. Defects and deficiencies of existing regulations as well as methods for the protection and management of specific wetland elements are discussed. Some suggestions about the Beijing wetland protection legislation are provided. Each component of relevant wetland research is reviewed and related to wetland management and policy. © 2013, Springer Science+Business Media Dordrecht.


Zhu J.-G.,Beijing Forestry University | Yu X.-X.,Beijing Forestry University | Gan J.,Beijing Municipal Bureau of Landscape and Forestry | Zhang Z.-M.,Beijing Forestry University
Chinese Journal of Ecology | Year: 2010

Ecologists have not reached a consensus on the major issues in ecosystem health. In this, paper three concepts relating to ecosystem health, i. e. health, system and ecosys-tem, were analyzed, and the concepts and connotations of ecosystem health, its research signifi-cances, content framework, and feasible scales » as well as the diagnosis and grade-assessment of ecosystem quality were discussed. It is suggested that ecosystem is one of the special systems in the context of systems science » with the characteristics of integrity, stability » and sustainability. Good integrity, stability, and sustainability are the necessary and sufficient conditions of ecosystem health. The criteria of ecosystem quality include qualitative diagnostic and grade-as-sessment ones. The qualitative diagnosis is a fact judgment (yes or not), while the grade-assess-ment is a value judgment. The indices for grade-assessment of ecosystem quality could also be di-vided into two kinds, the restrictively comparable and the non-restrictively comparable. The com-plexity of ecosystem determines that the studies on ecosystem health should be made with the help of the theories and methods in systems science and nonlinear science, the time lag in ecosystem disease determines that the forecast and early warning of ecosystem health should be strength-ened » and the transdisciplinarity of ecosystem health research determines that the reseds needs a broad cooperation among ecological, environmental, medical, social, and economic scientists.


Wu S.,Chinese Academy of Forestry | Hou Y.,Chinese Academy of Forestry | Yuan G.,Beijing Municipal Bureau of Landscape and Forestry
Unasylva | Year: 2010

A study was conducted to evaluate forest ecosystem goods and services and forest natural capital of the Beijing municipality, China. Forest land, one of the most important economic assets, is generally valued on the basis of market transactions, either directly or as property. A simple stumpage value method was used for the valuation of standing timber. Stumpage prices by species and diameter were taken area and in southern China. Estimates of forest carbon stock and stock changes were calculated based on growing stock and net increment using the biomass expansion factors (BEF) of the Intergovernmental Panel on Climate change. The value of forest carbon stock assets was calculated by multiplying forest carbon stock by the carbon price derived from the Badaling forest farm carbon project in Beijing, China. Estimation of the full range of values from forests is helpful in designing forest management strategies.

Loading Beijing Municipal Bureau of Landscape and Forestry collaborators
Loading Beijing Municipal Bureau of Landscape and Forestry collaborators