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森林斑块
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  forest patch
     The numbers of urban forest patch reached to 2 464, the area of the largest one reached up to 185.1 hm2 and the average area 0.43 hm2, the larger patches distributed major in the western side of the city;
     城市森林斑块数达到2464,最大面积185.1hm2,平均面积0.43hm2,大面积的风景林地主要集中在城市西侧;
短句来源
     Forest patch tending method(FPTM) takes target patch as the work unit with strong pertinence and flexible operation, appraisal of evaluation of the patch’s and the forest’essentiality as the committed step, with tree sign, selective cut of single tree and bosk, orientation planting for the main measure, it’s pertinence and agility is satisfactory.
     斑块抚育法以目标森林斑块为抚育作业单元,以斑块重要性评价、林木等级评价为关键步骤,以单株标号、单株择伐、丛(团、块)状择伐、定位补植为主要措施,具有较强的针对性与较高的灵活度。
短句来源
     From forest zone to the ecotone,forest patch size decreases while forest fragmentation increases.
     从森林带到森林 草原交错带 ,森林斑块变小、森林景观破碎化程度提高。
短句来源
  forest patches
     The number of forest patches in forest-meadow region is more than that in forest zone and in meadow -steppe region.
     森林斑块的数量在森林 草原交错带的森林草甸区最多 ,其次是森林带 ,再次是森林 草原交错带的草甸草原区 ,草原带没有森林斑块
短句来源
     The number of forest patches in forest-meadow regions is greater than that in the forest zone and in meadowsteppe regions.
     在森林-草原交错带森林草甸区森林斑块的数量最多,其次为森林带,再次为森林-草原交错带草甸草原区,草原带没有森林斑块
短句来源
     Through the analysis, we draw the conclusion: (1) There were 1647 urban forest patches within second ring road in Hefei. The total urban forest area is 348.54hm2, and it only occupied 3.5% in the research field.
     城市森林斑块共有 1647 块,总面积348.54hm2,占总面积的 3.56%,城市森林景观总体比例不大,且主要集中在一环路与二环路之间地区;
短句来源
     Surveys at Middle Taohe forest region showed that the Blood Pheasant could survive in heavily destroyed forest patches.
     对洮河中游林区的调查表明,在破坏较为严重的森林斑块中血雉仍能生存.
     Taking 746 forest patches of wuhan jiufeng urban forest reserve as research object, we assessed the forest landscape suitability in the aspects of environment, ecological function and aesthetic function of forest landscape.
     以九峰城市森林保护区746个森林斑块为研究对象,从森林景观环境适宜性、生态功能适宜性、美学功能适宜性三方面对森林景观的适宜度进行了评价。 采用数学组合法和GIS技术结合,在确定适宜度评价指标体系、因子分级标准、定量方式与因子权重后,应用地图叠加法和权重法对每一评价单元进行综合适宜度评价,得到结论如下:
短句来源
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  “森林斑块”译为未确定词的双语例句
     Patch fragmentation index of forest was higher than that of shrub, afforestation land, suitable forest land, woodland in No. 1,2,3,5 compartments.
     在1、2、3、5林班森林斑块破碎化程度大于灌木林、未成林、宜林地和疏林地;
短句来源
     The scale of the city forest was not big, and the main was distributed between first ring road and second ring road. The number and area of urban forest in the central city of Hefei was small and distributed asymmetrily, which mainly distributed in the south and around the ring park.
     城市森林斑块分布不均匀,主要集中在环城公园周围和城市的西南面,斑块的数量与面积从城市中心向外逐渐递增,但单位土地面积拥有的城市森林斑块数从中心向外递减,中心城区单位土地拥有的城市森林斑块面积最高,5%的土地面积,却拥有 12.2%城市森林斑块数与 23%的城市森林斑块面积,具有很高的贡献率;
短句来源
     And it played an important role in the urban forest within second ring road.
     城市森林斑块数量、面积及分布特点表明,合肥建成区城市森林对环境控制的能力较小。
短句来源
     For No. 13,14,15 compartments without human disturbance, the isolation degree of forest land was lower than nonforest land, suitable forest land, while that of afforestation was the lowest.
     在无居民点的13、14、15林班,森林斑块的分离度小于非林地、宜林地,分离度最大的是未成林。
短句来源
     Average patch area enlarged in mountain area because many strong measures had been taken against forest destroy since 1980s.
     受森林保护等政策的影响,15年来尽管森林覆盖率降低,但森林斑块平均面积增大。
短句来源
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  forest patch
(2) The area of all the forest patch types had witnessed great changes.
      
The fractal degree of each forest patch type became big from 1983 to 1999.
      
2) The area of some forest patch types, especially shrub forest, economic forest, Populus spp.
      
3) The fragemation degree of each forest patch type became greater from 1983 to 1999.
      
Conversely, when old forests cover less than 50%, a fine-grained mosaic is unfavourable, because each old forest patch becomes too small and isolated.
      
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  forest patches
To visualize temporal change, a case study of four different forest patches was animated.
      
Glossina fuscipes fuscipes Newstead was sampled in isolated thickets and forest patches near Lake Victoria, Kenya using unbaited biconical traps, between March 1992 and June 1993.
      
The effect of forest size on avian diversity was studied in oak forest patches in rural New Jersey.
      
Both herbivore species were significantly affected by surrounding plant diversity, but in opposite ways: beetles were more abundant in open patches whereas bugs were more abundant in forest patches.
      
Relationships between abundance and patch size in open and forest patches changed through the season for both herbivore species.
      
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The forest-steppe ecotone in northern Hebei and eastern Inner Mongolia is characterized by high biodiversity. The number of forest patches in forest-meadow regions is greater than that in the forest zone and in meadowsteppe regions. Diversity of forests decreased from the forest zone in the east to the steppe zone in the west via an ecotone. Steppe diversity, however, is characterized by higher plant diversity in the ecotone, especially in the forest-meadow region. β diversity indices of plant communities reached...

The forest-steppe ecotone in northern Hebei and eastern Inner Mongolia is characterized by high biodiversity. The number of forest patches in forest-meadow regions is greater than that in the forest zone and in meadowsteppe regions. Diversity of forests decreased from the forest zone in the east to the steppe zone in the west via an ecotone. Steppe diversity, however, is characterized by higher plant diversity in the ecotone, especially in the forest-meadow region. β diversity indices of plant communities reached peak values at the boundaries between the ecotoneand the forest zone or the steppe zone, and between the forest-meadow region and the meadow-steppe region withinthe ecotone.

河北北部、内蒙古东部森林-草原交错带富于高的生物多样性。在森林-草原交错带森林草甸区森林斑块的数量最多,其次为森林带,再次为森林-草原交错带草甸草原区,草原带没有森林斑块。植物群落的α多样性在森林群落和草原群落表现不同,森林群落从森林带到草原带依次减低;草原群落则表现出在森林-草原交错带植物多样性高,特别是在森林草甸区最明显。在森林-草原交错带β多样性指数较高,表现在产多样性指数在森林-草原交错带与森林带和草原带之间以及森林-草原交错带内森林草甸区和草甸草原区之间的边界不同程度地出现峰值。

As one of the elements contributing to landscape, patches have direct effects on the spatial patterns of landscape and functional interactions among the landscape cells. Patch dynamics leads to the change in landscape patterns. Heterogeneous patches commonly occur in tropical forests. This is to say, climax forest also maintains patches of different species composition and community structure. Forest growth cycle induced by natural events or human disturbance brings about the spatial mosaic of different patches....

As one of the elements contributing to landscape, patches have direct effects on the spatial patterns of landscape and functional interactions among the landscape cells. Patch dynamics leads to the change in landscape patterns. Heterogeneous patches commonly occur in tropical forests. This is to say, climax forest also maintains patches of different species composition and community structure. Forest growth cycle induced by natural events or human disturbance brings about the spatial mosaic of different patches. In any spot of forest, the patches at different growth phases, i.e., gap phase, building phase and mature phase, turn over. In the process of the growth cycle, the replacement of floristic elements takes place, too. These patches, on the other hand, shift on the forest background. The species diversity of tropical forests is maintained in the dynamics of forest patches.

斑块作为景观要素之一 ,直接影响到景观结构的空间格局及其内部各要素之间的相互关系 ,其动态也将导致景观格局的变化。异质性的斑块在自然森林中是普遍存在的 ,这就是说 ,顶极森林中仍然存在着由不同种类或不同生长时期的植物种群组成的森林斑块。由自然或人为干扰所驱动的森林生长循环导致了这些斑块在空间上的镶嵌 ,对于特定的地域片段 ,也导致了不同生长时期的森林斑块的周期性循环。在热带森林中 ,森林的生长循环由林窗期 (gapphase)、建群期 (buildingphase)和成熟期 (maturephase)构成。在成熟林中 ,大林窗的出现创造了生境的异质性 ,光照的增强、温度的升高以及湿度的降低不利于顶极树种的生长 ,而先锋树种则常常成为林窗空地的成功占领者 ,这就改变了斑块的质地和属性。随着森林斑块的发育 ,短命速生的先锋树种所形成的林冠又为顶极树种的生长创造了有利条件 ,由于先锋树种本身不能在自己的林冠下更新 ,使得林窗中的树种成分发生替代和变化 ,最终将恢复到近似于先前成熟林的结构 ,从而实现了森林斑块的循环。显而易见 ,森林动态的过程也意味着物种成分的循环。在...

斑块作为景观要素之一 ,直接影响到景观结构的空间格局及其内部各要素之间的相互关系 ,其动态也将导致景观格局的变化。异质性的斑块在自然森林中是普遍存在的 ,这就是说 ,顶极森林中仍然存在着由不同种类或不同生长时期的植物种群组成的森林斑块。由自然或人为干扰所驱动的森林生长循环导致了这些斑块在空间上的镶嵌 ,对于特定的地域片段 ,也导致了不同生长时期的森林斑块的周期性循环。在热带森林中 ,森林的生长循环由林窗期 (gapphase)、建群期 (buildingphase)和成熟期 (maturephase)构成。在成熟林中 ,大林窗的出现创造了生境的异质性 ,光照的增强、温度的升高以及湿度的降低不利于顶极树种的生长 ,而先锋树种则常常成为林窗空地的成功占领者 ,这就改变了斑块的质地和属性。随着森林斑块的发育 ,短命速生的先锋树种所形成的林冠又为顶极树种的生长创造了有利条件 ,由于先锋树种本身不能在自己的林冠下更新 ,使得林窗中的树种成分发生替代和变化 ,最终将恢复到近似于先前成熟林的结构 ,从而实现了森林斑块的循环。显而易见 ,森林动态的过程也意味着物种成分的循环。在林窗期、建群期和成熟期的不同生境条件的选择下 ,物种结构出现相应的替代和轮回 ,因此 ,热带森林景观中物种多样性的维持机制应该是

The analysis of spatial structure is the important approach to understand landscape structure and functional dynamic of forest landscape under the influence of people,the patch area,fractal dimension,variability coefficient and standard deviation of patch area,landscape diversity,landscape dominance are calculated by models and GIS to analyze spatial distribution and pattern of forest landscape in Anji mountainous district From the period of 1985 to 1999,coefficient of variability and standard deviation of...

The analysis of spatial structure is the important approach to understand landscape structure and functional dynamic of forest landscape under the influence of people,the patch area,fractal dimension,variability coefficient and standard deviation of patch area,landscape diversity,landscape dominance are calculated by models and GIS to analyze spatial distribution and pattern of forest landscape in Anji mountainous district From the period of 1985 to 1999,coefficient of variability and standard deviation of patch area increase,and shape coefficient of forest landscape increases,but dominance and fragment index of forest landscape decrease The forest dynamic shows that forest habitats are becoming more diversified in fine way under area increment of ecological public forest and structure regulation of forest species

森林景观空间结构分析 ,是认识森林景观结构、功能动态的重要途径 .运用景观生态学原理 ,借助地理信息系统技术 ,选取斑块面积、斑块分维数、斑块面积变异系数及标准差、景观多样性、景观优势度等指标 ,分析了安吉山区森林景观的空间分布格局特征 .从 1 985年至 1 999年显示森林斑块面积变异系数及标准差从 1 .487、 2 .373到 1 .70 0、 3.844,呈明显增大趋势 ;森林景观形状指数从 83.69到 91 .5 ,呈增大趋势 ;景观优势度从 0 .868到 0 .80 7,呈减弱趋势 ;森林景观破碎度从 9.1 5 %到 8.32 % ,呈降低趋势 .反映出由于生态公益林面积的逐年增加 ,林种结构比例的适度调整 ,林区生境趋向于多样化良性方向发展

 
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