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Spatial heterogeneity of the driving forces of cropland change in China

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Science China Earth Sciences 2005年第12期48卷 2231-2240页

作者： LIU Xuhua1,2. WANG Jinfeng1, LIU Mingliang4,1 & MENG Bin1,2.3 1. institute of Geographic Sciences and Natural Resources Research, chinese {2. of Sciences, Beijing 100101, China 2. Graduate School of the chinese {2. of Sciences, Beijing 100039, China 3. College of Arts and Sciences of Beijing Union University, Beijing 100083, China 4. School of forestry and Wildlife Sciences, Auburn University, Auburn, Alabama, AL36849, USA 1. institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences 100101 Beijing China 2. Graduate School of the chinese academy of Sciences 100039 Beijing China 3. School of forestry and Wildlife Sciences Auburn University Auburn AL36849 Alabama USA 4. College of Arts and Sciences of Beijing Union University 100083 Beijing China

By using digital satellite remote sensing data acquired in 1987―1989 and 1999―2.00 and GIS combined with the natural and socio-economic data, this paper drew an integrated zonation of the cropland change and its driving forces in China. The results indicated that the cropland change in the study period was constrained by geographical factors and driven by cli-mate change as well as socio-economic system. Moreover, the regional differences of the drivers for cropland change were significant. In the midwest of China, natural condition changes and geographical background were the main constraints and drivers, while in Eastern China, social and economic changes and economic policies were the main driving forces. The cropland loss was nationwide. The dominant factors to cause this decrease included buildup of developing area to attract foreign capital and technologies, changes of industry structure due to urban in-fluence, the change of employment notions thanks to living standard improvement, rapid ur-banization due to the expansion of cities and towns, the diminished farming net income partly because of the global warming effects, and the rapid economic growth stimulated by the con-venient transportation system. These factors interact and interdepend with each other to cause the cropland loss in China recently. The reasons for the increase of cropland were primarily the cultivation and deforestation by the farmers who want to increase income. This study on the mechnism of LUCC relied on the cropland change integrated classification considering the natural or human factors both inside and outside the region, which provides a new approach to study the integrated regionalization and LUCC mechanism.

关键词： land use change, driving force, integrated classification, spatial statistics, cropland, China.

Important population viability analysis parameters for giant pandas(Aliuropoda melanoleuca)

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动物学研究 2012年第3期 18-24页

作者： Minghao GONG1,2.*,Yanling SONG2.Zhisong YANG3,Chen LIN1 1.Wildlife Monitoring Centre,academy of Forest Inventory and Planning,State forestry Administration,Beijing 100714,China 2.{2. of Zoology,the chinese academy of Sciences,Beijing 100101,China 3.institute of Rare Animals and Plants,China West Normal University,Nanchong 637002.China

Population viability analysis(PVA) is a tool to evaluate the risk of extinction for endangered species and aid conservation *** quality of PVA output is dependent on parameters related to population dynamics and life-history;however,it has been difficult to collect this information for the giant panda(Aliuropoda melanoleuca),a rare and endangered mammal native to China,confined to some 30 fragmented habitat *** giant pandas are long-lived,mature late,have lower reproductive rates,and show little sexual dimorphism,obtaining data to perform adequate PVA has been ***,we develop a parameter sensitivity index by modeling the dynamics of six giant panda populations in the Minshan Mountains,in order to determine the parameters most influential to giant panda *** data shows that the giant panda populations are most sensitive to changes in four female parameters:initial breeding age,reproductive rate,mortality rate between age 0 and 1,and mortality rate of *** parameter sensitivity index strongly correlated with initial population size,as smaller populations were more sensitive to changes in these four *** model suggests that demographic parameters of females have more influence on the results of PVA,indicating that females may play a more important role in giant panda population dynamics than ***,reintroduction of female individuals to a small giant panda population should be a high priority for conservation *** findings form a technical basis for the coming program of giant panda reintroduction,and inform which parameters are crucial to successfully and feasibly monitoring wild giant panda populations.

关键词： Giant panda PVA Population parameter Parameter sensitivity index

Family Outcrossing Rates of Pinus caribaea Morelet var. caribaea in Seed Orchard and Natural Populations

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chinese forestry Science and Technology 2002年第1期1卷 46-56页

作者： ZHENG YongqiResearch institute of forestry. {2.. Beijing 100091

Family outcrossing rates of Pinus caribaea var. caribaea populations that differed in origin and management were estimated by using isozyme markers. The family outcrossing rates were estimated by (1)fixing the probability of pollen gene frequency (p); (2. allowing pollen gene frequency to vary among families. The estimates of family outcrossing rates for all the populations varied widely among families (clones of the seed orchard), ranging from 0.39 to 2.0. The average family outcrossing rates of both m...

关键词： Pinus caribaea var. caribaea Family outcrossing rate mating system isozyme seed orchard

The Secrets Behind Vegetation Control on Snail Fever

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chinese forestry Science and Technology 2002年第1期1卷 89-93页

作者： ZHANG XudongResearch institute of forestry, {2. Beijing 100091,China

Oncomelania (Oncomelania hupensis), a dioecian, ovoviviparous, and amphibious snail, is the sole intermediate host of Schistosoma japonicum, the most wide-spread snail fever in the world. Chemical eliminating the host proved unacceptable for there was severe contamination to water and soil. The river beaches and the delta areas of five provinces in the middle and lower reaches of Yangtze River in China provide the most favorable habitats for Oncomelania. Our studies have revealed that the occurrence of ...

关键词： Oncomelania snail fever vegetation

Research and Conservation of Forest Genetic Resources in China

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chinese forestry Science and Technology 2002年第1期1卷 57-66页

作者： GU WanchunResearch institute of forestry. {2.. Beijing 100091, China

The present situation of forest tree genetic germplasm resources research and conservation in China is introduced which including the background, decision-making of conservation strategies and principles, the plan of area division and tree species classification, the sample strategy of germplasm conservation, the advances in conservation pattern and related technologies research, the achievements of germplasm conservation and utilization in China, and the problems to be solved. The recent achievements a...

关键词： forestry tree genetic resources germplasm resources conservation China

Redescription of the Genus Cladiucha（Hymenoptera：Tenthredinidae） and Descriptions of Two New Species from　China

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Forest Ecosystems 1994年第1期 15-22页

作者： Xiao Gangrou Forest Research institute,chinese academy of forestry,Beijing {2.

ＲｅｄｅｓｃｒｉｐｔｉｏｎｏｆｔｈｅＧｅｎｕｓＣｌａｄｉｕｃｈａ（Ｈｙｍｅｎｏｐｔｅｒａ：Ｔｅｎｔｈｒｅｄｉｎｉｄａｅ）ａｎｄＤｅｓｃｒｉｐｔｉｏｎｓｏｆＴｗｏＮｅｗＳｐｅｃｉｅｓｆｒｏｍＣｈｉｎａＸｉａｏＧａｎｇｒ... 详细信息

ＲｅｄｅｓｃｒｉｐｔｉｏｎｏｆｔｈｅＧｅｎｕｓＣｌａｄｉｕｃｈａ（Ｈｙｍｅｎｏｐｔｅｒａ：Ｔｅｎｔｈｒｅｄｉｎｉｄａｅ）ａｎｄＤｅｓｃｒｉｐｔｉｏｎｓｏｆＴｗｏＮｅｗＳｐｅｃｉｅｓｆｒｏｍＣｈｉｎａＸｉａｏＧａｎｇｒｏｕＦｏｒｅｓｔＲｅｓｅａｒｃｈＩ...

关键词： Hymenoptera Symphyta Tenthredinidae Cladiucha

Constraint Analysis and Countermeasures for China's forestry Scientific and Technological Achievements Transformation

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chinese forestry Science and Technology 2009年第3期8卷 64-70页

作者： QI Yueqing1 BAO Yingshuang2.1. Research institute of Forest Ecology, Environment and Protection, chinese academy of forestry, Beijing {2., P. R. China 2. Research institute of forestry Policy and Information, chinese academy of forestry, Beijing {2., P. R. China

This paper analyzes the constraint factors of forestry scientific and technological achievements transformation and explores the countermeasures and measures to promote the transformation. It points out that to achieve maximum return from investment funds in forestry research, it shall improve the transformation of scientific and technological achievements, enhance independent innovation capability, and greatly enhance the supply capacity of scientific and technological achievements, so as to provide endlessly a reserve of scientific and technological achievements for forestry development.

关键词： achievement transformation constraint

Assessing and regulating the impacts of climate change on water resources in the Heihe watershed on the Loess Plateau of China

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Science China Earth Sciences 2010年第5期53卷 710-720页

作者： LI Zhi1,2. LIU WenZhao2. ZHANG XunChang3 & ZHENG FenLi2.1 College of Resources and Environment, Northwest Agriculture & forestry University, Yangling 712.00, China 2.institute of Soil and Water Conservation, {2. academy of Sciences & Ministry of Water Resources, Yangling 712.00, China 3 USDA-ARS Grazinglands Research Laboratory, 73036, El Reno, Oklahoma, USA 1. College of Resources and Environment Northwest Agriculture & Forestry University Yangling 712100 China2. Institute of Soil and Water Conservation Chinese Academy of Sciences & Ministry of Water Resources Yangling 712100 China3. USDA-ARS Grazinglands Research Laboratory El Reno Oklahoma 73036 USA

Climate change can cause considerable changes in water resources and assessing the potential impacts can provide important information for regional sustainable development. The objectives were to evaluate the possible impacts of climate change during 2.10-2.39 on water resources (runoff, soil water content, and evapotranspiration) in the Heihe watershed on the Loess Plateau of China and to further explore adaptive measures to cope with the changes. Projections of four climate models (CCSR/NIES, CGCM2. CSIRO-Mk2. and HadCM3) under three emission scenarios (A2. B2. and GGa) were used to estimate future changes in precipitation, maximum and minimum temperature based on Change Factor method. The Soil and Water Assessment Tool (SWAT) was employed to simulate the hydrologic responses to climate changes. The CA-Markov model was used to develop land use scenarios. Compared with the present climate, the climate models predicted a -2.3% to 7.8% change in annual precipitation, 0.7 to 2.2.C rises in maximum temperature, and 1.2.to 2.8°C rises in minimum temperature. Without consideration of land use change, SWAT predicted a -19.8% to 37.0% change for runoff, -5.5% to 17.2. change for soil water content, and 0.1% to 5.9% increase for evapotranspiration during 2.10–2.39 under all climate scenarios. Though the change of hydrometeorolocial variables are complex, they would possibly increase with great probability, and the hydrological regime would be influenced such as a decrease in runoff in winter months. With land use changes, the projected land use of 2.15 would increase soil water content by 4.0% and surface runoff by 5.7% while slightly decrease evapotranspiration by 0.6% compared with the 2.00 land use. This result showed that adjustment of land use patterns was capable of regulating water resources and could be used to mitigate the adverse effects of climate change.

关键词： climate change water resources SWAT the Loess Plateau

Comparative transcriptome analyses reveal candidate genes regulating wood quality in Japanese larch(Larix kaempferi)

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Journal of forestry Research 2020年第1期31卷 65-73页

作者： Shae He Yunhui Xie Xiaomei Sun Shougong Zhang Key Laboratory of Tree Breeding and Cultivation of State forestry Administration,Research institute of forestry,chinese academy of forestry,Beijing 100091,People’s Republic of China State Key Laboratory of Tree Genetics and Breeding Chinese Academy of ForestryBeijing 100091People’s Republic of China Key Laboratory of Tree Breeding and Cultivation of State forestry Administration Research Institute of ForestryChinese Academy of ForestryBeijing 100091People’s Republic of China

We studied the molecular mechanism of the quality traits of wood formation in *** used the immature latewood cells of two Japanese larch(Larix kaempferi)clones with significant differences in density and in microfibrillar angle(MFA)as materials to analyze their gene expression profiles.A total of 1735 differentially expressed genes were detected in immature latewood cells of the two clones,among which,971 were up-regulated and 764 were *** gene expression profiling analysis revealed that genes encoding transcription factor members NAC66 and R2.3-MYB4,microtubule-associated protein,actin-related protein,cell wall protein members,arabinogalactan protein,Fasciclin-like arabinogalactan protein and glycine-rich protein,and several cell-wall-synthesis genes affected wood density and MFA by regulating latewood formation at transcriptional *** study results represent a basis for selection of quality traits and genetic improvement of larch wood.

关键词： Japanese larch Wood formation Transcription regulation Wood property Digital gene expression profiling