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森林起源
相关语句
  forest origin
     Taking position of sampling spots on mountains, diet bamboo species and growth status, forest origin, vegetation types, human disturbance and intensity as factors, and there are 2, 3 or 4 levels in each factor.
     把各样点的生境特征,包括在山上的位置、其食竹的种类和生长状态、森林起源、植被类型、人类干扰类型和强度等作为因素,对每一因素设置2,3,或4个水平.
短句来源
  “森林起源”译为未确定词的双语例句
     MethodsBased on interpolating analysis and statistical function of GIS,mang factors such as origin forest,shadow-covering ration,shrub-covering ration,bamboo-covering ration and growing situation are systematically analyzed acarding to the third investigation data about panda habitiat in Shaanxi-Qinling Area,and the spatial distribution graphes of each factor are mapped,which reflects the ecological condition of in habitiont directly.
     方法 根据陕西省秦岭地区第3次大熊猫栖息地调查资料,结合GIS软件的内插分析及统计功能,从森林起源、乔木郁闭度、灌木盖度、竹子盖度及生长状况等方面进行了系统的分析研究,并绘制了各要素的空间分布图,从直观上反映了栖息地的生态状况。
短句来源
     The paper select three natural factors which affect the quality of giant panda's habitat and can be divided into seven evaluation indexes: origin forest,shadow-covering ration,shrub covering ration,bamboo covering ration,bamboo growing situation,slope and aspect,then calculate the weight value of seven indexes through Analytic Hierarchy Process(AHP) according to the data of the third giant pandas investigation in Shaanxi province,and overlay the seven indexes based on spatial analysis of GIS.
     以陕西省第三次大熊猫调查数据为基础,首先确立了影响大熊猫栖息地质量的7个指标:森林起源,乔木郁闭度,灌木盖度,竹子生长状况,竹子盖度,坡度和坡向,然后采用层次分析法计算所确立的7个评价指标的权重,并结合GIS空间叠置分析方法对7个评价指标进行叠加,获得了洋县大熊猫栖息地质量分级图。
短句来源
  相似匹配句对
     The Origin of the Heavenly Stems and Earthly Branche
     干支的起源
短句来源
     The Origin of Sentiment
     感伤的起源
短句来源
     Forests——A Book from Heaven
     森林是天书
短句来源
     A Portrait of Forest
     森林的肖像
短句来源
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Based on a lot of data. the forest resource crisis and the forestry economic dangerous situation intile forest region of Heilongjiang province caused by overcutting over 50 years and the misadjustment of forest internal structure were expounded. It was suggested that the main task of getting rid ofthe crisis and developing forestry. realizing the forest classification management and carrying out theprotective engineering of natual forests was to regulate the forest resources structure. It was proposedtile adjusting...

Based on a lot of data. the forest resource crisis and the forestry economic dangerous situation intile forest region of Heilongjiang province caused by overcutting over 50 years and the misadjustment of forest internal structure were expounded. It was suggested that the main task of getting rid ofthe crisis and developing forestry. realizing the forest classification management and carrying out theprotective engineering of natual forests was to regulate the forest resources structure. It was proposedtile adjusting target and regulating game for the structures of soil utilizing category of forest. the periodof forest management. the origin of forest. dominant stand. the species of marco stand composition.stand age. stand density and diameter class.

论述了黑龙江省森工林区当前所出现的。两危"是由于历经半个世纪的过量采伐,使森林一系列内在结构失调所致。提出治危兴林.进行森林分类经营和实施天然林保护。程的主要任务.就是调整森林资源结构;提出了土地利用结构、林种结构、森林经营周期结构、森林起源结构、优势林分结构、宏观的林分组成树种结构、林分龄组结构、林分密度结构、径阶结构的调整指标和对策等。

The authors counted the droppings of the giant pandas by the route method at the Wanglang Nature Reserve and characterized their habitats. Among 390 sampling spots, droppings at 80 sampling spots, dens at 19 sampling spots, bamboo fragments gnawed by pandas at 103 sampling spots, one individual panda at one sampling spot were found. Totally at 125 sampling spots panda traces occurred. Taking position of sampling spots on mountains, diet bamboo species and growth status, forest origin, vegetation types, human...

The authors counted the droppings of the giant pandas by the route method at the Wanglang Nature Reserve and characterized their habitats. Among 390 sampling spots, droppings at 80 sampling spots, dens at 19 sampling spots, bamboo fragments gnawed by pandas at 103 sampling spots, one individual panda at one sampling spot were found. Totally at 125 sampling spots panda traces occurred. Taking position of sampling spots on mountains, diet bamboo species and growth status, forest origin, vegetation types, human disturbance and intensity as factors, and there are 2, 3 or 4 levels in each factor. Then a contingency table for each factor was formed. Occurring of pandas is in the row (r = 2) of contingency table, while the various levels of factors are in the column (c = 2, 3 or 4). The results of chisquare testing of independence show that at the Wanglang Nature Reserve the giant pandas: (1) forage at elevation 2600~3000 m; (2) prefer to Fargesia denudafa and more of their activities happen in forests where arrow bamboo grows better; (3) use more natural habitats rather than artificial ones, but no difference found between the old and secondary forests; (4) use more often coniferous forests; (5) avoid habitats where logging and grazing exist and their exploitation intensity decreases as human disturbance becomes intensive.

利用路线法在野外调查了四川平武王朗自然保护区全部49条沟中390个样点的大熊猫粪便及其所处生境的特征,共发现80个样点有粪便,19个样点有卧穴,103个样点有啃食竹的残桩,1个样点发现大熊猫活个体,总共有125个样点发现有大熊猫的痕迹.把各样点的生境特征,包括在山上的位置、其食竹的种类和生长状态、森林起源、植被类型、人类干扰类型和强度等作为因素,对每一因素设置2,3,或4个水平.将大熊猫的生境各样点有无大熊猫作为行(r=2),将各因素的水平设为列(c=2,3或4),从而组成一个2×c联列表.在某样点是否有大熊猫痕迹与各生境因素的水平相互独立的零假设下,χ2检验的结果表明:(1)大熊猫在海拔2600~3000m取食;(2)对缺苞箭竹有明显的偏好,且在生长良好的生境处活动频繁;(3)对天然生境的利用比对人工林的利用高得多,对原始林和次生林的利用则没有明显差异;(4)更多地利用有针叶林;(5)明显回避有森林采伐和牲畜放牧的生境,且生境利用率随人类干扰强度的增加而减少.

Two methods, the forage ratio selection index and contingency table analysis, were used in 2001 to describe habitat selection of both giant pandas and grazing livestock at the Yele Nature Reserve, located in the Xiaoxiangling Mountains of Sichuan Province in China's Southwest. We used the degree, aspect, position and shape of slope, vegetation type, forest origin, tree height, canopy, shrub height, shrub coverage and bamboo coverage to characterize habitats of both the giant panda and livestock. The economy...

Two methods, the forage ratio selection index and contingency table analysis, were used in 2001 to describe habitat selection of both giant pandas and grazing livestock at the Yele Nature Reserve, located in the Xiaoxiangling Mountains of Sichuan Province in China's Southwest. We used the degree, aspect, position and shape of slope, vegetation type, forest origin, tree height, canopy, shrub height, shrub coverage and bamboo coverage to characterize habitats of both the giant panda and livestock. The economy of the area is undeveloped and local people rely heavily on raising grazing livestock, mostly yaks which consume bamboo stems, leaves and shoots as part of their diet. Our survey and associated data base consists of 98 routes and 482 plots and covers an area of about 200 km 2. A route was a path encompassing a two square kilometer area set within a reserve; along the path, plots were placed every 200 m change in elevation or change in vegetation. These data enable us to assess the impacts of livestock grazing on the habitat of the giant panda. By using the forage ratio selection index, we can estimate impacts on giant panda populations. Among the 482 sampling plots in our survey, panda traces, mostly giant panda droppings, were found at 54 plots and livestock grazing at 159 plots. These giant panda traces as well as grazing livestock were observed between 2870~3900m and 2700~4000m respectively. Forage ratio selection indices suggest that the giant panda prefers habitats characterized by a convex slope, south aspect, old conifer forests, shrub coverage of 0~24%, bamboo coverage above 50%, and shows no preference for other factors, such as slope angle, tree, canopy, or shrub height. In contrast, grazing livestock prefer habitats characterized by either concave or convex slopes, lower slope positions, slope angles less than 20°, shrubs and meadows, re growth forests with 5 to 9m tall trees, and shows no preference for slope aspect, tree canopy, shrub height or coverage, and bamboo coverage. Both giant pandas and grazing livestock randomly select the remaining habitat factors in the Yele Nature Reserve. The overlap of certain habitat types by both giant pandas and grazing livestock results in competition for space and food resources. This overlap is greatest in forests with the same tree canopy and shrub heights. However, habitat separation does occur as giant pandas prefer to forage in conifer forests whereas grazing livestock prefer re growth forests, which gives us the opportunity to plan and design habitats more suitable for grazing livestock and to separate these habitats from preferred giant panda habitats. Such a design should enable both the economically sustainable development of communities and the conservation of the giant panda.

利用 Forage Ratio指数对小相岭山系大熊猫与放牧牲畜的生境选择进行了比较研究 ,研究涉及 1 1种生境因子。研究结果表明 ,大熊猫喜欢选择在山体的脊部和中部的凸坡 ,坡向南坡 ,喜欢选择 0~ 2 4 %的灌木盖度 ,喜欢竹子盖度大于 5 0 %的原始针叶林 ,对坡度、乔木高度、乔木郁闭度、灌木高度不存在选择性 ,都为随机利用。放牧牲畜喜欢选择利用复合坡、山体的下部、坡度小于 2 0°的山坡 ;喜欢利用的生境类型是草坡和灌丛 ;选择的森林起源是次生林 ;所利用生境的乔木高度为 5~ 9m,对坡向、乔木郁闭度、灌木高度、灌木盖度、竹子盖度都随机利用。放牧家畜与大熊猫在对生境因子的利用上有许多共同点 ,对许多因子类型大多都是随机利用 ,因而 ,在对一些生境因子的利用上 ,放牧对大熊猫的活动会产生一定的影响。同时 ,它们在生境选择上也存在一定的差异 ,特别是在对植被类型和森林起源的选择上差异较大 ,只要合理的规划和控制放牧活动 ,也就可能达到大熊猫保护与社区经济协调发展的目的

 
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