查询词典 quadrates

This means that in 1995 a smaller set of species was found more often in the quadrates; the quadrates were more uniform.

这意味着，在1995年，一个规模较小的物种被发现，往往在quadrates ； quadrates更为均匀。

Furthermore,twelve standard quadrates of nine formations were sampled,and the data on the community structures were obtained.

通过对其中9个主要群落类型12个样地的样方调查，得到了有关群落结构的基本资料。

The results showed that a significant positive association was observed at the sampling levels of 50 m^2, 100 m^2, and 250 m^2 quadrates, and a sampling size of 100 m^2 was more suitable than that of 50 and 250 m^2 for the inter-specific association analysis.

结果表明：20个乔木种群在抽样面积分别为50、100和250平方公尺3种取样水平上均表现为显著的正关联，但取样面积为100平方公尺，比50平方公尺和250平方公尺更为合适。

Sample plots with different age of Larix olgensis forest in Changbai Mountain and small sample quadrates in every sample plot were set up.

在长白山林区不同龄级的落叶松林处设置样地，在样地上设置小样方。

The gathered groups of plant quadrates in the space of DCA ordination are consistent with the result of TWINSPAN,and this revealed a relationship between plant for...

DCA结果同TWINSPAN分析结果比较一致，并且较好地反映了植物群系和环境之间的关系，其中第1轴明显地反映出各个群系的水热梯度的变化，同时也反映出坡向的变化趋势；而第2轴则反映出海拔的梯度变化，表明群系所在地的海拔是决定群系分布的主要环境因素。

Diversity between two quadrates within a community decreased with increasing elevation. The peak values of dissimilarity index and Cody index along elevation gradient just matched the ecotones between different vegetation types.

群落内的β多样性随海拔的升高而下降，而群落间的β多样性可以很好地反映群落间的相似性关系，β多样性较大的几个峰值恰好是不同植被类型间的分界。

We did this by sampling the same transect in forest form map six times,using six different quadrates (0.5 km×0.5 km,0.5 km×2 km,2 km×0.5 km,1 km×1 km,1 km×4 km,2 km×2 km).

排序作为群落生态学的重要定量方法，在国内外已广泛应用[1～5，8，9，12，19，20，25，28]。

A successional Artemisia ordosica and A. frigid community, located on the eastern edge of the Tengri Desert in Alashan Left Banner, Inner Mongolia, was selected as an object for study. Densities of the plants and total nitrogen and available phosphorus in 0~20 cm soil layer were measured of the 400 quadrates (4m×4m) in the sampling plot (80m×80 m) for analysis of relationship between N/P ratio in the soil and plant density thereupon and between the two in spatial heterogeneity.

选择腾格里沙漠东缘内蒙古阿拉善左旗境内的油蒿＋冷蒿群落为研究对象，在80m×80m样地400个4m×4m样方中，调查了油蒿和冷蒿的密度，测定了0~20cm土层中的全氮和有效磷，分析了土壤氮／磷比与植物密度之间及其空间异质性之间的关系。

Based on the survey of community plots, a quantitative analysis of the communities at Luya Mountain is performed with TWINSPAN Two Way Indicator Species Analysis and DCA Detrended Correspondence Analysis methods. 82 quadrates collected from Luya Mountains were classified into 28 types by TWINSPAN, which belong to seven vegetation types. The result of DCA indicated that those 28 types were reliable. Diagonal line of the two-dimensional ordination diagram of DCA reflects the gradient changes of elevation, temperature and humidity. It is considered that the major factors that restrict the community distribution of the mountains are elevation、temperature and humidity.

本文在群落样方调查基础上，采用双向指示种分析法TWINSPAN和除趋势对应分析DCA对山西芦芽山植物群落进行数量分类和排序TWINSPAN等级分类将芦芽山82个样方分为28类，可归属于7个植被型，分类结果反映了植物群落类型与环境梯度之间的关系，并在 DCA二维排序图上得到较好的验证DCA排序轴对角线基本反映了海拔、温度和湿度的梯度变化，表明群落生境所在地的海拔、温度和湿度是决定群落分布的主要因素

Quadrates collected from Luya Mountains were classified into 28 types by TWINSPAN, which belong to seven vegetation types. The result of DCA indicated that those 28 types were reliable. Diagonal line of the two-dimensional ordination diagram of DCA reflects the gradient changes of elevation, temperature and humidity.

TWINSPAN等级分类将芦芽山82个样方分为28类，可归属于7个植被型，分类结果反映了植物群落类型与环境梯度之间的关系，并在 DCA二维排序图上得到较好的验证。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。