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niche space
相关语句
  生态位空间
     Under favourable environments, the populations could extend its niche space by the speed of 10 cm per year.
     如果环境条件有利,蒙古蒿种群将以每年10cm的速度扩展种群的生态位空间
短句来源
     Based on the principle of niche space compartmentalization, the characteristics of multi-dimension niche of dominant populations in Chinese fir and broad-leaved mixed forest were studies with the formulas of niche overlap and niche breadth.
     在生态位空间分割基础上 ,应用两种不同类型的生态位宽度公式和生态位重叠公式测定了杉阔混交林不同资源空间中主要种群的多维生态位特征。
短句来源
     Under the communities with ground surface vegetation interspecies competition during restoration succession of the flooded meadow, the offspring number of existed clones still increased exponentially, and the niche space expanded rapidly at the same time.
     在水淹后恢复演替群落具有地被植物种间竞争的条件下,五脉山黧豆仍可以通过指数函数迅速地增加着无性系的子代数量,同时也迅速地扩展着无性系的生态位空间
短句来源
     On flooded alkaline meadow where existed interspecific competition, the natural clones could still increase their offspring numbers exponentially, and quickly expand their niche space at the same time.
     在具有种间竞争的碱化草甸土上,羊草无性系在水淹后恢复演替过程中仍可以通过指数形式迅速地增加无性系的子代数量,同时也迅速地扩展着无性系的生态位空间.
短句来源
  生态位
     Under favourable environments, the populations could extend its niche space by the speed of 10 cm per year.
     如果环境条件有利,蒙古蒿种群将以每年10cm的速度扩展种群的生态位空间。
短句来源
     3. According to the date from April 20 July 18 in 2004, it was studied that the time niche, space niche and the two_dimensional niche, the overlap value stated that the dominant natural enemies were Pardosa astrigera , Erigonidium graminicolum , Oedothorax feminea to Plutella maculipennis Curtis , Vegetable Aphides.
     3.本文根据2004年4月20日到7月18日的调查数据,对甘蓝田蜘蛛、昆虫群落的时间生态位、空间生态位、时—空生态位进行研究。 从其重叠值来看,对于害虫小菜蛾、桃蚜、甘蓝蚜、萝卜蚜来讲,星豹蛛、草间小黑蛛、阴瘤胸蛛是其最优天敌。
短句来源
     Based on the principle of niche space compartmentalization, the characteristics of multi-dimension niche of dominant populations in Chinese fir and broad-leaved mixed forest were studies with the formulas of niche overlap and niche breadth.
     在生态位空间分割基础上 ,应用两种不同类型的生态位宽度公式和生态位重叠公式测定了杉阔混交林不同资源空间中主要种群的多维生态位特征。
短句来源
     Under the communities with ground surface vegetation interspecies competition during restoration succession of the flooded meadow, the offspring number of existed clones still increased exponentially, and the niche space expanded rapidly at the same time.
     在水淹后恢复演替群落具有地被植物种间竞争的条件下,五脉山黧豆仍可以通过指数函数迅速地增加着无性系的子代数量,同时也迅速地扩展着无性系的生态位空间。
短句来源
     On flooded alkaline meadow where existed interspecific competition, the natural clones could still increase their offspring numbers exponentially, and quickly expand their niche space at the same time.
     在具有种间竞争的碱化草甸土上,羊草无性系在水淹后恢复演替过程中仍可以通过指数形式迅速地增加无性系的子代数量,同时也迅速地扩展着无性系的生态位空间.
短句来源
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  niche space
Niche structure and dinoflagellate competition for niche space are considered.
      
Recent arrivals at the family level are mostly of zoochorous species of forest tree, indicating (subject to the effects of disturbance) a continuing increase in potential niche space within the island interiors.
      
Convergence in foraging methods between the island Blue Tit and the mainland Coal Tit can be explained without considering current interspecific competition as a determinant of niche space.
      
Perch thermal niche space expanded for air temperature increases of up to 4°C, but largely disappeared for the 9°C increase.
      
Model simulations indicated pronounced changes in the temporal and vertical availability of fish thermal niche space.
      
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The implications of fundamental and realized niche proposed by Hutchi-nson in 1957 are discussed.Species realized niche will never overlap based on hisdefinition,contracting with that in the realistic environmental array.To remedvthe confusion in using the concepts of fundamental and realized niche,we sug-gest that these two notions should be defined for a species or a species population individually.A species fundamental niche will not be cenfined in a particularcommunity but in its areal or even in some hypothesized...

The implications of fundamental and realized niche proposed by Hutchi-nson in 1957 are discussed.Species realized niche will never overlap based on hisdefinition,contracting with that in the realistic environmental array.To remedvthe confusion in using the concepts of fundamental and realized niche,we sug-gest that these two notions should be defined for a species or a species population individually.A species fundamental niche will not be cenfined in a particularcommunity but in its areal or even in some hypothesized environmental characte-ristic combination which allows the species to survive and reproduce,i.e.,funda-mental niche is determined by the species physiological tolerance or requirements.It should be an entity or hypervolume in the n-dimensional niche space.A speciesrealized niche is described as the environmental characteristic combinations thatsurround a species population in a particular community.In the niche space,it ismanifold.Another new concept,niche center,is defined as the point or a compart-ment where the species response is optimal within the niche space.When a speciesdistribution is ignored or the species has a homogenous distribution within the a-vailable compartments of the compartmentalized niche space,the point defined iscalled its theoretical niche center.Usually species disstribution is uneven andthe point defined is called its realized niche center.The distance froma species rea-lized center to theoretical niche center is defined as its niche deviation.And thedegree of a speices niche hypervolume diffuse within the niche space is describedwith the niche diffusion index.Formulae are proposed for such metrics and anexample from a south China subtropical evergreen forest community is presented.

本文对n 维超体积生态位定义作了进一步的阐明.物种的“基础生态位”为其分布区的环境参数及其生理学容忍性和要求所决定,而“实现生态位”则为该物种种群在某一特定群落生境中所处的环境参数所确定.一物种的生态位中心点为该物种在生态位空间中具最佳适应的位置.进而根据是否在测度中考虑进物种分布参数,而分别称为理论与实现生态位中心点.以广东鼎湖山厚壳桂(Cryptocarya)群落在利用土壤营养方面为例,说明物种生态位中心点等指数的测度.

A new approach for the measurement of niche characteristics was employed which enables comparison between different plant species according to their distribution on a topographic gradient. Landform was analyzed with 4 attribute indices—elevation, aspect, location (position on slope) and slope—which were then viewed as a multidimensional environmental gradient. Using this model and the results of field sampling of Fagus engleriana and F. lucida communities and the topography of their habitats, multi ...

A new approach for the measurement of niche characteristics was employed which enables comparison between different plant species according to their distribution on a topographic gradient. Landform was analyzed with 4 attribute indices—elevation, aspect, location (position on slope) and slope—which were then viewed as a multidimensional environmental gradient. Using this model and the results of field sampling of Fagus engleriana and F. lucida communities and the topography of their habitats, multi dimensional niche breadths and niche overlaps were calculated for the two Fagus spp. The results suggest that: 1) the integrated niche width of F. engleriana is larger than that of F. lucida, the niche of F. lucida is wider on the aspect gradient, but F. engleriana is more broadly distributed on elevation, location and slope gradients; 2) niche overlaps of the two Fagus species are 0.259, 0.831, 0.670 and 0.676 on the elevation, aspect, location and slope gradients and the integrated nice overlap of the two species is 0.087; 3) the vertical ranges of F. lucida and F. engleriana are 1300 1950 m and 1450 2600 m respectively. F. engleriana prefers shaded and half shaded slopes at NW80 ° NE80 °; however, F. lucida population tends to concentrate on the half heliophilic and half shaded slope at NW20 ° SW10 °and NE20 ° SE10 °. F. luci da is absent at the valley bottom, and its importance value increases as the location uplifts; on the other hand, the importance values of F. engleriana are larger on the more stable and humid locations of type 1 and 3; the distribution range on slope gradient is wider for F. engleriana , with the majority on 20 40°, while F. lucida is concentrated in the range of 35 45°. The results indicate that topographic variables are efficient and effective indicators of gradients in plant species multidimensional niche space, and can properly reflect niche difference of different species at the scale of the landscape. Discussion of the reciprocal validation of the niche measurement on different environmental factors concludes the paper.

提出了根据不同植物种在地形梯度上的分布格局测度和比较其生态位的思路。将地形分解为海拔、坡向、坡位和坡度 4个属性指标 ,作为多维生态位空间的环境梯度轴。根据对三峡大老岭地区米心水青冈 (Fagus engleri-ana)和亮叶水青冈 (F.lucida)群落样方及其地形因子调查 ,分析了两个种的多维生态位宽度及种间的生态位重叠。结果 :1)大老岭米心水青冈种群的生态位宽度总体上大于亮叶水青冈。亮叶水青冈在坡向梯度上的生态位较宽 ;米心水青冈在海拔、坡位和坡度梯度上的生态位较宽 ;2 )两个种在海拔、坡向、坡位和坡度梯度上的生态位重叠度分别为 0 .2 5 9、0 .831、0 .6 70、0 .6 76 ,其总体重叠度为 0 .0 87;3)亮叶水青冈和米心水青冈分布的海拔范围分别为 130 0~ 2 0 0 0 m和 145 0~ 2 6 0 0 m。米心水青冈主要分布于 NW80°~ NE80°之间的阴坡和半阴坡 ;亮叶水青冈集中于NW2 0°~ SW10°和 NE2 0°~ SE10°的半阴半阳坡。亮叶水青冈不见于沟谷底部 ,其重要值随坡位上升而增大 ;而米心水青冈在湿润稳定的中、下坡位重要值最高。米...

提出了根据不同植物种在地形梯度上的分布格局测度和比较其生态位的思路。将地形分解为海拔、坡向、坡位和坡度 4个属性指标 ,作为多维生态位空间的环境梯度轴。根据对三峡大老岭地区米心水青冈 (Fagus engleri-ana)和亮叶水青冈 (F.lucida)群落样方及其地形因子调查 ,分析了两个种的多维生态位宽度及种间的生态位重叠。结果 :1)大老岭米心水青冈种群的生态位宽度总体上大于亮叶水青冈。亮叶水青冈在坡向梯度上的生态位较宽 ;米心水青冈在海拔、坡位和坡度梯度上的生态位较宽 ;2 )两个种在海拔、坡向、坡位和坡度梯度上的生态位重叠度分别为 0 .2 5 9、0 .831、0 .6 70、0 .6 76 ,其总体重叠度为 0 .0 87;3)亮叶水青冈和米心水青冈分布的海拔范围分别为 130 0~ 2 0 0 0 m和 145 0~ 2 6 0 0 m。米心水青冈主要分布于 NW80°~ NE80°之间的阴坡和半阴坡 ;亮叶水青冈集中于NW2 0°~ SW10°和 NE2 0°~ SE10°的半阴半阳坡。亮叶水青冈不见于沟谷底部 ,其重要值随坡位上升而增大 ;而米心水青冈在湿润稳定的中、下坡位重要值最高。米心水青冈适应的坡度范围很宽 ,主要在 2 0°~ 40°;而亮叶水青冈集中在 35°~ 45°的坡度范围。上述结果表明 :在景观尺度上 ,采用地形因子表征植物多维生态位空间的梯度

Based on the principle of niche space compartmentalization, the characteristics of multi-dimension niche of dominant populations in Chinese fir and broad-leaved mixed forest were studies with the formulas of niche overlap and niche breadth. The results showed that resources availability influenced niche matrices greatly. The adaptability of dominant populations varied in different resources spaces. In the same resources space, there was no positive correlation between...

Based on the principle of niche space compartmentalization, the characteristics of multi-dimension niche of dominant populations in Chinese fir and broad-leaved mixed forest were studies with the formulas of niche overlap and niche breadth. The results showed that resources availability influenced niche matrices greatly. The adaptability of dominant populations varied in different resources spaces. In the same resources space, there was no positive correlation between niche breadth and niche overlap of a species countserpart. The niche overlap between Chinese fir and the same other tree species varied in different resources space. The relationship between niche overlap and competition was influenced by the bio-characteristics of tree populations greatly. The results of the study can be applied for the management of mixed forests.

在生态位空间分割基础上 ,应用两种不同类型的生态位宽度公式和生态位重叠公式测定了杉阔混交林不同资源空间中主要种群的多维生态位特征。结果表明 :考虑资源利用率与否对生态位宽度的测度有较大影响。杉阔混交林主要种群在不同资源空间中的生态适应性不同。在同一资源空间中 ,种对间生态位宽度与生态位重叠并非成正相关关系。在不同资源空间中 ,杉木与同一其它树种之间的生态位重叠发生变化。生态位重叠与竞争之间关系在很大程度上受种对间的生物学特性的左右。研究杉阔混交林多维生态位特征对混交林营造具有指导作用

 
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