Taking Linkou Forestry Bureau, Heilongjiang Province, China as the demonstration plot and Dendrolimus pinidiatrea as an example, we developed a WebGIS-based information service platform for forest pest forecast using ...Taking Linkou Forestry Bureau, Heilongjiang Province, China as the demonstration plot and Dendrolimus pinidiatrea as an example, we developed a WebGIS-based information service platform for forest pest forecast using J2EE and ArcGIS Server technology. The service platform is able to predict the occurrence period, amount of pest, occurrence tendency, and pest zones in the B/S environment and realized the display, querying, analysis and editing of the spatial data and the automatically integrated control of multilevel Data,. Additionaly, the service platform offers the visualization of geographic service and predicted results. It provides a solution for prediction of forest pest and forest resource management.展开更多
Three indexes including forest pest occurrence area,control area and input fund of 31 provinces from 2003 to 2014 were selected from Forestry Statistical Yearbook,to establish dynamic interaction index evaluation syst...Three indexes including forest pest occurrence area,control area and input fund of 31 provinces from 2003 to 2014 were selected from Forestry Statistical Yearbook,to establish dynamic interaction index evaluation system with clustering robust regression model and Stata 13. 0 software. Total forest pest control efficiency in China was determined according to the computing result of entropy method. Suggestions such as improving forest pest control efficiency,increasing service efficiency and input amount of forest pest control input funds were put forward. It will provide empirical basis for target management evaluation of forest pest control work and accountability system.展开更多
Fungi and bacteria as insecticides have been tested to control forest pests for more than ten years, they are the saine kind of biocontrol agent with the different conentrations. thesame kind of the biocontrol agent w...Fungi and bacteria as insecticides have been tested to control forest pests for more than ten years, they are the saine kind of biocontrol agent with the different conentrations. thesame kind of the biocontrol agent with the different origin areas, and the mixtures of the different kinds of biocontrol agents. The infection mechanism of virus was discussed. moreover. the mfluence of these biocontrol agents on the small animals was also evaluated.展开更多
From 2015 to 2017, a total of 1957 investigation sites were set up in Sanyuan District of Sanming City, to conduct a comprehensive investigation on the species, occurrence and distribution of forest pests in 200 speci...From 2015 to 2017, a total of 1957 investigation sites were set up in Sanyuan District of Sanming City, to conduct a comprehensive investigation on the species, occurrence and distribution of forest pests in 200 species of plants. The results showed that there were 163 species of forest pests in Sanyuan District, including 122 species of pests and 41 species of diseases. Dendrolimus punctatus walker, Monochamus alternatus Hope, Pantana phyllostachysae Chao, Loudonta dispar(Kiriakoff), Rammeacris kiangsu(Tsai) and Schizotetranychus nanjingensis Ma et Yuan were common forest pests, and Bursaphelenchus xylophilus(Steiner et Burher) Nickle was an invasive forestry quarantine disease. The prevention and control measures and technical measures against B. xylophilus and common forest pests were put forward, in order to provide scientific basis for productive control.展开更多
We analyzed national forest inventory data collected from circa 2000–2018 across 37 states in the eastern United States to better understand the influence of forest health related canopy disturbances on the regenerat...We analyzed national forest inventory data collected from circa 2000–2018 across 37 states in the eastern United States to better understand the influence of forest health related canopy disturbances on the regeneration and recruitment dynamics of upland oaks(Quercus).We found low levels of oak recruitment across all disturbance types examined but limited evidence of any direct effects from the type of disturbance on the population of regenerating oaks.The general lack of differences in oak regeneration response between forest health disturbances and disturbances caused by harvested or non-disturbed plots does not indicate that the effects of forest health disturbances were benign,however.Instead,low level of oak recruitment across all disturbance types highlights the pervasiveness of the trend of shifting composition in once oak-dominated forests where oak is absent or sparse in the regeneration layer.Our results show that oak recruitment was higher when oak was present as advance reproduction prior to disturbance from any cause examined.Collectively,these results lead us to conclude that the widespread inadequacy of oak advance reproduction in mature oak-dominated forests is the prevailing threat to oak forest health and sustainability.We suggest the status of advance reproduction be treated as a co-morbidity when weighing the risk and potential outcomes from other threats to upland oak forests in the eastern United States.展开更多
To improve the accuracy and effectiveness of forest pests forecasting,based on current forecast model,integrating the database and WebGIS technology,a practical design and construction approach of forest pest knowledg...To improve the accuracy and effectiveness of forest pests forecasting,based on current forecast model,integrating the database and WebGIS technology,a practical design and construction approach of forest pest knowledge base was put forward,and the forecast system on Web application framework was realized with satisfactory empirical results.展开更多
Many domestic and international scholars have done a wide range of researches on electromagnetictheory and technology and have made some achievements. Electromagnetic technology has been used inforest pests control as...Many domestic and international scholars have done a wide range of researches on electromagnetictheory and technology and have made some achievements. Electromagnetic technology has been used inforest pests control as a convenient and high-efficient physics means. This article summarizes the currentstudy of the electromagnetic biological effect and introduces the application of microwave, pulsedelectromagnetic field and electrostatic field to forest pests control. The research direction and prospect of theapplication of electromagnetic theory and technology to forest pests control are also discussed.展开更多
Background:The Siberian moth(Dendrolimus sibiricus)is a serious pest of conifers in Russia,Northern Kazakhstan,Mongolia and China.The western border of the pest’s distribution in Russia is disputed,but it is present ...Background:The Siberian moth(Dendrolimus sibiricus)is a serious pest of conifers in Russia,Northern Kazakhstan,Mongolia and China.The western border of the pest’s distribution in Russia is disputed,but it is present west of the 60th meridian east.The pest has the potential to defoliate a wide range of conifers.Results:The pest is not present in Norway or other European countries,except Russia.Natural spread and human mediated transport are potential pathways for the pest.Human mediated pathways considered are:Living trees for planting,coniferous wood in the rough and foliage and branches.There has been no import of living trees from Russia to Norway during the past 30 years,and there is currently no import of coniferous wood commodities containing bark from areas,where D.sibiricus occurs.Conclusions:The probability of D.sibiricus entry by natural spread is unlikely,mainly because of the geographical distance and the partial sea barriers between Norway and the infested areas.The probability of entry by human mediated pathways is unlikely due to the very limited volume of the import.Should the pest enter Norway,the probability of establishment and spread is unlikely,due to the suboptimal climatic conditions,and the fact that the two dominant conifers in the country,Norway spruce(Picea abies)and Scots pine(Pinus sylvestris),are intermediate and poor hosts,respectively.The potential damage,should D.sibiricus enter Norway,is considered low.展开更多
Forest biological disasters(FBD) seriously impact energy flow and material cycling in forest ecosystems,while the underlying causes of FBD are complex. These disasters involve large areas and cause tremendous losses. ...Forest biological disasters(FBD) seriously impact energy flow and material cycling in forest ecosystems,while the underlying causes of FBD are complex. These disasters involve large areas and cause tremendous losses. As a result,the occurrence of FBDs in China( CFBD) threatens the country's ability to realize its strategic target of increasing both forested area(40 million ha) and forest volume(1.3 billion m^3) from 2005 to 2020. Collectively,China has officially named this effort to increase forest area and volume the "Two Increases" as national goals related to forestry. Based on Hurst index analysis from fractal theory,we analyzed the time series of the occurrence area and related data of FBDs from 1950 to 2007 to quantitatively determine the patterns of the macro occurrence of FBDs in China. Results indicates that,the time series of( CFBD) areas is fractal( self-affinity fractal dimension D = 1. 3548),the fluctuation of( CFBD) areas is positively correlated( auto-correlation coefficient C = 0. 2170),and the occurrence of the time series of( CFBD) is long-range dependent( Hurst index H =0. 6416),showing considerably strong trend of increases in FBDC area. Three different methods were further carried out on the original time series,and its two surrogate series generated by function surrogate in library t series,and function Surrogate Data in library in Wavelet software R,so as to analyze the reliability of Hurst indexes. The results showed that the Hurst indices calculated using different estimation methods were greater than 0. 5,ranging from 0. 64 to 0. 97,which indicated that the change of occurrence area data of FBDs was positively autocorrelated.The long-range dependence in forest biological disasters in China is obvious,and the spatial extent of FBDs tended to increase during this study period indicating this trend should be expected to persistent and worsen in the future.展开更多
In this paper, we briefly summarize the problems that have been affecting Slovakian forestry in the past, in the present and are expected in the future. In the past, the forests in Central Europe were significantly ha...In this paper, we briefly summarize the problems that have been affecting Slovakian forestry in the past, in the present and are expected in the future. In the past, the forests in Central Europe were significantly harmed by the development of mining, metallurgy, wood processing industry, agriculture and grazing of sheep and cattle. Many areas have been completely deforested. Fundamental change occurred in the 18th Century, when the regulations about forest management, declared by Empress of the Austro-Hungarian monarchy Maria Therese, came into force. With the changing level of forest cover, there have been changing as well the problems in the forestry. Forests in Slovakia are nowadays dealing with the climate change, which is causing extreme weather fluctuations. It is connected with the emergence of abiotic disturbances after which usually occurs activation of biotic harmful agents. We expect that the most serious problem of forests in the future will be their state of health. We expect an increase representation of thermophilic tree species (beech and oak) at the expense of upland trees such as spruce. An important role will be played by the invasive species of plants, fungi and animals that can compete with native species and their habitats or in the situation of the absence of their reducents these can cause serious economic and environmental damage.展开更多
文摘Taking Linkou Forestry Bureau, Heilongjiang Province, China as the demonstration plot and Dendrolimus pinidiatrea as an example, we developed a WebGIS-based information service platform for forest pest forecast using J2EE and ArcGIS Server technology. The service platform is able to predict the occurrence period, amount of pest, occurrence tendency, and pest zones in the B/S environment and realized the display, querying, analysis and editing of the spatial data and the automatically integrated control of multilevel Data,. Additionaly, the service platform offers the visualization of geographic service and predicted results. It provides a solution for prediction of forest pest and forest resource management.
基金Supported by Analysis of Forest Pest Cost Responsibility Investigation System(2017-R04)Protection and Development:Coordination Mechanism Research from the Perspective of Community(71373024)
文摘Three indexes including forest pest occurrence area,control area and input fund of 31 provinces from 2003 to 2014 were selected from Forestry Statistical Yearbook,to establish dynamic interaction index evaluation system with clustering robust regression model and Stata 13. 0 software. Total forest pest control efficiency in China was determined according to the computing result of entropy method. Suggestions such as improving forest pest control efficiency,increasing service efficiency and input amount of forest pest control input funds were put forward. It will provide empirical basis for target management evaluation of forest pest control work and accountability system.
文摘Fungi and bacteria as insecticides have been tested to control forest pests for more than ten years, they are the saine kind of biocontrol agent with the different conentrations. thesame kind of the biocontrol agent with the different origin areas, and the mixtures of the different kinds of biocontrol agents. The infection mechanism of virus was discussed. moreover. the mfluence of these biocontrol agents on the small animals was also evaluated.
基金Supported by Key Project of Fujian Provincial Department of Science and Technology [2012N0008]
文摘From 2015 to 2017, a total of 1957 investigation sites were set up in Sanyuan District of Sanming City, to conduct a comprehensive investigation on the species, occurrence and distribution of forest pests in 200 species of plants. The results showed that there were 163 species of forest pests in Sanyuan District, including 122 species of pests and 41 species of diseases. Dendrolimus punctatus walker, Monochamus alternatus Hope, Pantana phyllostachysae Chao, Loudonta dispar(Kiriakoff), Rammeacris kiangsu(Tsai) and Schizotetranychus nanjingensis Ma et Yuan were common forest pests, and Bursaphelenchus xylophilus(Steiner et Burher) Nickle was an invasive forestry quarantine disease. The prevention and control measures and technical measures against B. xylophilus and common forest pests were put forward, in order to provide scientific basis for productive control.
基金This project falls under Task Agreement 18-JV-11242311-084 with the USDA Forest ServiceNorthern Research Station,within master joint venture agreement 18-JV-11242311-093 under the Great Rivers Cooperative Ecosystems Studies Unit.
文摘We analyzed national forest inventory data collected from circa 2000–2018 across 37 states in the eastern United States to better understand the influence of forest health related canopy disturbances on the regeneration and recruitment dynamics of upland oaks(Quercus).We found low levels of oak recruitment across all disturbance types examined but limited evidence of any direct effects from the type of disturbance on the population of regenerating oaks.The general lack of differences in oak regeneration response between forest health disturbances and disturbances caused by harvested or non-disturbed plots does not indicate that the effects of forest health disturbances were benign,however.Instead,low level of oak recruitment across all disturbance types highlights the pervasiveness of the trend of shifting composition in once oak-dominated forests where oak is absent or sparse in the regeneration layer.Our results show that oak recruitment was higher when oak was present as advance reproduction prior to disturbance from any cause examined.Collectively,these results lead us to conclude that the widespread inadequacy of oak advance reproduction in mature oak-dominated forests is the prevailing threat to oak forest health and sustainability.We suggest the status of advance reproduction be treated as a co-morbidity when weighing the risk and potential outcomes from other threats to upland oak forests in the eastern United States.
文摘To improve the accuracy and effectiveness of forest pests forecasting,based on current forecast model,integrating the database and WebGIS technology,a practical design and construction approach of forest pest knowledge base was put forward,and the forecast system on Web application framework was realized with satisfactory empirical results.
基金Supported by the National Nature Science Foundation of China (grant No. 30471384 )
文摘Many domestic and international scholars have done a wide range of researches on electromagnetictheory and technology and have made some achievements. Electromagnetic technology has been used inforest pests control as a convenient and high-efficient physics means. This article summarizes the currentstudy of the electromagnetic biological effect and introduces the application of microwave, pulsedelectromagnetic field and electrostatic field to forest pests control. The research direction and prospect of theapplication of electromagnetic theory and technology to forest pests control are also discussed.
文摘Background:The Siberian moth(Dendrolimus sibiricus)is a serious pest of conifers in Russia,Northern Kazakhstan,Mongolia and China.The western border of the pest’s distribution in Russia is disputed,but it is present west of the 60th meridian east.The pest has the potential to defoliate a wide range of conifers.Results:The pest is not present in Norway or other European countries,except Russia.Natural spread and human mediated transport are potential pathways for the pest.Human mediated pathways considered are:Living trees for planting,coniferous wood in the rough and foliage and branches.There has been no import of living trees from Russia to Norway during the past 30 years,and there is currently no import of coniferous wood commodities containing bark from areas,where D.sibiricus occurs.Conclusions:The probability of D.sibiricus entry by natural spread is unlikely,mainly because of the geographical distance and the partial sea barriers between Norway and the infested areas.The probability of entry by human mediated pathways is unlikely due to the very limited volume of the import.Should the pest enter Norway,the probability of establishment and spread is unlikely,due to the suboptimal climatic conditions,and the fact that the two dominant conifers in the country,Norway spruce(Picea abies)and Scots pine(Pinus sylvestris),are intermediate and poor hosts,respectively.The potential damage,should D.sibiricus enter Norway,is considered low.
基金Supported by the Project "Researches of Southern China’s Forestry Strategy"(2013-R17) and "Improvement of the Forest Resources Monitoring System of China"(2011-R03) Funded by the State Forestry Administration of China
文摘Forest biological disasters(FBD) seriously impact energy flow and material cycling in forest ecosystems,while the underlying causes of FBD are complex. These disasters involve large areas and cause tremendous losses. As a result,the occurrence of FBDs in China( CFBD) threatens the country's ability to realize its strategic target of increasing both forested area(40 million ha) and forest volume(1.3 billion m^3) from 2005 to 2020. Collectively,China has officially named this effort to increase forest area and volume the "Two Increases" as national goals related to forestry. Based on Hurst index analysis from fractal theory,we analyzed the time series of the occurrence area and related data of FBDs from 1950 to 2007 to quantitatively determine the patterns of the macro occurrence of FBDs in China. Results indicates that,the time series of( CFBD) areas is fractal( self-affinity fractal dimension D = 1. 3548),the fluctuation of( CFBD) areas is positively correlated( auto-correlation coefficient C = 0. 2170),and the occurrence of the time series of( CFBD) is long-range dependent( Hurst index H =0. 6416),showing considerably strong trend of increases in FBDC area. Three different methods were further carried out on the original time series,and its two surrogate series generated by function surrogate in library t series,and function Surrogate Data in library in Wavelet software R,so as to analyze the reliability of Hurst indexes. The results showed that the Hurst indices calculated using different estimation methods were greater than 0. 5,ranging from 0. 64 to 0. 97,which indicated that the change of occurrence area data of FBDs was positively autocorrelated.The long-range dependence in forest biological disasters in China is obvious,and the spatial extent of FBDs tended to increase during this study period indicating this trend should be expected to persistent and worsen in the future.
基金supported by the Slovak Research and Development Agency under the contract No.APVV-0045-10funded by the Operational Program of Research and Development and co-financed with the European Fund for Regional Development(EFRD).Grant:ITMS:26220220109 Prognostic infor-mation systems for improving the efficiency of forest management(50%).
文摘In this paper, we briefly summarize the problems that have been affecting Slovakian forestry in the past, in the present and are expected in the future. In the past, the forests in Central Europe were significantly harmed by the development of mining, metallurgy, wood processing industry, agriculture and grazing of sheep and cattle. Many areas have been completely deforested. Fundamental change occurred in the 18th Century, when the regulations about forest management, declared by Empress of the Austro-Hungarian monarchy Maria Therese, came into force. With the changing level of forest cover, there have been changing as well the problems in the forestry. Forests in Slovakia are nowadays dealing with the climate change, which is causing extreme weather fluctuations. It is connected with the emergence of abiotic disturbances after which usually occurs activation of biotic harmful agents. We expect that the most serious problem of forests in the future will be their state of health. We expect an increase representation of thermophilic tree species (beech and oak) at the expense of upland trees such as spruce. An important role will be played by the invasive species of plants, fungi and animals that can compete with native species and their habitats or in the situation of the absence of their reducents these can cause serious economic and environmental damage.
