species composition

Tree Species Composition Index and Its Application

树种组成指数及其应用

The disease was correlated with tree species composition , stand density and canopy density .

油松枯萎病的发生与树种组成、林分密度和郁闭度的关系密切。

Application of Matrix Model in Optimal Tree Species Composition

矩阵模型在最优树种组成研究中的应用

The species composition and distribution characteristics of phytoplankton were discussed .

初步研究了浮游植物的种类组成和数量分布特点。

Species composition was different among the distinguishing utilization approaches of land .

土地利用方式对植物种类有明显影响，不同的利用方式，植物种类明显不同。

Species composition and spatial structure of plants in urban parks of Beijing

北京城区公园的植物种类构成及空间结构

Species composition and their protection of plants resources in the built area of Beijing

北京城区常见野生草本植物资源种类构成及其保护利用对策

Selection of tree species composition in Shenyang 's urban forest communities

沈阳城市森林群落的树种组合选择

1.1 Species composition and population dynamics of each species of the communities

1.1群落物种构成及各种群数量动态

Species composition , variation and distribution of these pests are discussed in this paper .

依照本次调查的结果，对江苏省非鞘翅目仓储害虫的分布，种类组成及变化进行分析讨论，种数的增加与农土特产等物资交流密切相关。

The population dynamics and species composition changed obviously with seasons and years .

该地鼠类混合种群数量季节变动和年度变化明显，五年间鼠类组成发生变化。

The species composition and quantity distribution characteristics of zooplankton in Fujian sea area

福建海区浮游动物种类组成及数量分布特点

Variation in Plant Species Composition and Diversity under Different Proportion of Impervious Surface

武汉市主城区不同非渗透面比例下植物的物种组成和多样性变化

Species composition of community was determined by regional species pool at landscape scale .

在景观尺度上，物种组成由区域种库决定。

Fish Species Composition in Honghu Lake and Estimation of Influencing Factors

洪湖鱼类物种组成及影响因素评价

Study on Species Composition of Rocky Coastal Protective Forest

沿海岩质海岸防护林体系树种配置设计

N deposition changes species composition and decrease plant diversity in forest ecosystems .

氮沉降会改变植物组成和降低森林植物的多样性。

Grazing obviously changed the plant species composition , especially on dominant plant species .

放牧对草地植物群落物种组成，尤其是优势种，产生了明显的影响。

The species composition and their quantitative changes of this area have been understood probably .

基本弄清了该区段藻类种类组成及数量变化。

Study on species composition and community structure of grassland rodent in Zhangye Region

张掖地区草原啮齿动物种类组成与群落结构研究

Objective To find out the species composition and distribution of fly in Shaoxing city area .

目的掌握绍兴市区蝇类的构成及分布。

Community structures and species composition of oak forests in mountainous area of Beijing

北京山区栎林的群落结构与物种组成

Species composition and characterization of weed community in maize fields in Hebei Province

河北省玉米田杂草组成及群落特征

Characteristics of species composition of fish eggs and larvae in East China Sea in summer

东海中尺度夏季鱼卵仔鱼种类组成特征

Species composition , abundance and distribution of fishes in the Bohai Sea

渤海鱼类种类组成及数量分布

Species Composition and Spatial Distribution of Ants in Shangqiu Region

商丘地区蚂蚁种类及分布

Investigation on species composition and seasonal fluctuation of vectors at Tianjin airport

天津机场口岸媒介生物种类及季节消长调查报告

Investigation of Tree Species Composition of Fengshui Woods in Foshan City

佛山市风水林树种组成调查研究

Species composition in genus Scylla from the coast of southeast China

中国东南沿海青蟹属（Scylla）的种类组成

Vertical differentiation of plant species composition in east slope of the Helan Mountain

贺兰山植物物种资源构成的垂直分异