生态位宽度

并对生态位宽度、生态位相似性比例以及生态位重叠关系进行了初步探讨。

The relationships among niche breadth , niche similarity and niche overlap were discussed .

而较小生态位宽度值的树种之间则可有较高的生态位重叠值。

Besides broad niche breadth , most evergreen broad leaf species share high niche overlap .

结果表明，各主要种群在3个资源轴上的生态位宽度均较大，生态位宽度平均最大值出现在有机质资源维上，平均最小值出现在全N资源维上；

The results showed as the follow : the niche breadth of main population in three resource axis are breader , average maximum appears on organic matter resource axis , and average minimum appears on total N resource axis .

本文采用Shannon-Wiener生态位宽度指数将南北坡群落的建群种群分别划分为3个生态类群。

Adopting Shannon-Wiener , the niche breadth index , the article classified constructive species on both slopes into 3 ecologic groups respectively .

从生态位宽度（B＿，BL）生态位相似比例闪）和生态位重叠几。和Lbi）三个方面探讨不同干扰尺度对甜储林群落主要种群生态位的影响。

The paper studies the effect of main tree species ' niche in the communities with different scales of disturbance from three aspects of niche breadth , proportional similarity and overlap .

宿主特异性用Levins生态位宽度进行测定。宿主选择用夹角余弦生态位重叠进行测定。

Levins ' niche breadth was used for the host-specificity , while clip angle niche overlap and a fuzzy clustering analysis were used for host-selection .

33B棉田各昆虫种群的生态位宽度指数偏高；

The niche breadth index of insect population on BT cotton was higher than that on common cotton .

在珠海市10个陆生次生林群落中设置了112个10m×10m样方，用于珠海市次生林群落23个优势种的生态位宽度和生态位重叠的研究。

A total of one hundred and twelve 10 m × 10 m quadrats were set up in ten terrestrial secondary forest communities of Zhuhai City , Guangdong Province to study the niche breadth and niche overlap of the dominant plant species .

采用Shannon-Wiener和Levins指数以及Petraitis特定重叠指数对五台山蓝花棘豆群落的18个优势种群的生态位宽度和生态位重叠进行了研究。

The niche breadth and niche overlap of 18 dominant species in O. coerulea communities in mount Wutai were studied by using Levins and Shannon-Wiener 's indexes and Petraitis 's methods .

采用样方法进行调查，每个样地面积为20m×20m。测度主要种群的生态位宽度、生态位相似比例、生态位重叠值。

In this paper the niche of the main tree populations in Pinus taiwanensis forest in Gutian Mountain National Nature Reserve were measured using the formulas of niche breadth , niche similarity and niche overlap by sampling method , every plot was 20 m × 20 m.

运用TWINSPAN把样方分为8个群落类型，用Levins、Shannon-wiener生态位宽度公式和Petraitis生态位特定重叠指数公式测定群落中主要种群生态位宽度和生态位重叠，并分析各种群生态位的生态学意义。

68 quadrats were divided into eight types of communities by TWINSPAN , which can be treated as one-dimension resource states . The niche breadths and overlaps of main dominant species were measured using a series of indices proposed by Levins , Shannon-wiener and Petraitis .

分析红豆树（Ormosiahosiei）百年以上老林分的11个乔木层树种的相对优势度、物种多样性、均匀度、生态位宽度、生态位重叠度等指标。

The relative dominant degrees , species diversity , even degrees , niche width , niche overlapping degrees , and other indicators were analyzed by the arbor trees of 11 stories in the hundred-year-old virgin forest of Ormosia hosiei Hemsl . et Wils .

结果表明：考虑资源利用率与否对多维生态位宽度的测定有较大的影响。

The results showed that resources availability affected niche breadth greatly .

生态位宽度和生态位重叠度之间不存在明显的相关性。

It is apparent absence of correlation between niche breadth and overlap .

若尔盖湿地3种无尾两栖类不同发育阶段的生态位宽度

Niche Breadths of Three Anurans at Different Ontogenetic Stages in Zoige Wetland

施肥后主要物种生态位宽度发生了较大变化，施肥使得各物种生态位宽度都明显增高。

Niche breadths of major species widen markedly after fertilization .

蜘蛛类天敌的生态位宽度在不同的资源等级上表现极不均衡。

The niche breadth of spider natural enemies differed in different stages .

4种白蚁生态位宽度与资源竞争分析

Analysis on the Niche Breadth and Resource Competition of the Four Termite Species

结果表明：群落中主要优势乔木种群的生态位宽度较大；

The results show that the niche breadths of main dominant species were greater .

使除稻红瓢虫和球腹蛛外的天敌时间生态位宽度扩大；

The temporal niche width of natural enemies except Theridiidae and Coccinellidae was broadened ;

均匀分布的种群，取样尺度越大，则生态位宽度值越大。

The niche breadth of the species with uniform distribution increased with increasing sampling scale .

瓢虫类在塔城和伊犁小麦田的时间生态位宽度均较长。

Coccinellids had the longest temporal niche in wheat fields in both Tacheng and Ili .

并计算了苔藓植物的生态位宽度和重叠值。

The niche breadth and the niche overlap were calculated . names of people and places ;

一般单位鼠类的多样性和均匀度较高，种群生态位宽度以褐家鼠最大，为0.939。

The width of population niche of R. norvegicus was the largest ( i.e. 0.939 ) .

各调查时期水稻纹枯病的水平空间生态位宽度指数差异不大。

Indexes of horizontal spatial niche breadth of rice sheath blight in different dates were similar .

优势恙螨的生态位宽度差异与生态位重叠均明显。

The niche breadth of the6 dominant chigger species is different with a wide niche overlap .

根据生态位宽度指数将湿地植物分为4个生态类群。

According to the niche breadth index , wetland plants can be classified into four groups .

对同类品牌生态位宽度及重叠度的计算公式进行了扩展。

The paper set up a calculation formula of the length and the overlapping-degree of the brand-niche .

而生态位宽度较小的物种，生态位相似性比例较小。

On the contrary , the niche similarity among the species with small niche breadths was lower .

结果表明，白颈长尾雉和白鹇栖息地空间生态位宽度均十分狭窄。

The results showed that the integrative niche breadth of these two pheasant species was very narrow .