查询词典 niche

The results showed that the height niche breadth of Litsea subcoriacea and Cinnamomum chekiangense in gaps and in non-gaps were the biggest. The height niche overlaps were greater between those species that had similar biological and ecological characteristics, and vice versa.

结果表明：桂北木姜子和浙江桂在林隙内外都占有较高的生态位宽度；生物学特性和生态学特性接近的树种高度生态位重叠较大，反之则较小；在林隙内，山矾和薄叶山矾的高度生态位重叠最大，而桂北木姜子和黄瑞木、尖叶水丝梨，浙江桂和尖叶水丝梨的高度生态位重叠较小；在非林隙内，山矾和黄瑞木的高度生态位重叠最大，桂北木姜子和尖叶水丝梨、黄瑞木的高度生态位重叠较小。

The characters of regeneration niche for seed germination,seedling growth,soil seed bank and vegetative reproductionof Papilionaceae and Car agana spp.andits relationship withrestoration of desert vegetation were summarized,for the purpose of providing theoretical basis for regeneration niche in the study onreproductive biology and restoration ecology of C.spp..

对蝶形花科，锦鸡儿属落叶灌木柠条(Caragana spp。)的种子萌发、幼苗生长、土壤种子库和营养繁殖等更新生态位特征及其与荒漠植被恢复的关系进行了综述，旨在为柠条的繁殖生物学和恢复生态学研究提供更新生态位方面的理论依据。

It's shown that Carex stenocarpa, Polygonum viviparum, Kobresia capillifolia and Festuca ovina's niche breadth are wider; Potentilla sp., Polygonum viviparum, Geranium pratense and others' niche breadth are more narrow. The former belong to extensive species, it is high in adapting to soil acid and salification, the latter belong to equilibrium species, it's adaptability is weaker than the former.

结果表明，细果苔草、珠芽寥、线叶嵩草、羊茅等建群种和优势种的生态位最宽，适应土壤酸碱和盐渍化能力强，为泛化种；委陵菜、千叶蓍、草原老鹤草等伴生种生态位窄，适应酸碱和盐渍化能力弱，为特化种。

Zokor mounds;niche breadth;niche overlap; plant functional types;Index of grassland quality

鼢鼠土丘；生态位宽度；生态位重叠；植物功能群；草地质量指数

There is a growing focus on niche markets. Although there is no doubt that niche markets have existed for a long time, they are emerging to the fore at an increasing rapid rate and in some cases they are eclipsing regular search.

虽然利基市场毫无疑问已经存在了相当长的时间，但他们正以越来越快的速度赶超着，在某些情况下，它们甚至超过了常规的搜索。

In order to disclose the adaptive strategies and capacity of Potaninia mongolica Maxim, acquired during its evolution history, the whole response system, which was composed of individual morphology plasticity response, organs anatomy structure response, physiological function response of anti-arid and anti-hotness, activities of protective enzymes response, endogenous hormone adjustment response, sexual reproduction strategies response of seeding, dispreading, sprouting and renewing, asexual reproduction strategies response of clonal growth patterns, clonal growth architectures, clonal growth architectures plasticity, heterogeneous resources utilization strategies, endogenous hormone distribution in clonal organs, foraging behavior, risk-spreading, and resource sharing, individual density allocation patterns response, niche differentiation response, species connection response, allelopathy response and biodiversity components response of the plant was profoundly explored in this paper.The studies come to at least four important results:(1) Taking the sensitive response and evading strategy to adapt to environment stress, Potaninia mongolica Maxim is a successful species has lived through the long-term evolution. Nevertheless, it is narrow climate and soil niche and characteristic of vegetation reproduction which has made the plant a rare and endangered species.

本论文通过对绵刺环境胁迫下个体形态可塑性响应、器官解剖结构响应、抗旱性和抗热性生理功能响应、保护酶系统激活响应、内源激素调控响应，有性繁殖对策中结实、扩散、萌发、更新等生活史过程响应，无性繁殖对策中克隆生长格局响应、克隆生长构型响应、克隆生长构型可塑性响应、克隆生长构型与资源异质性响应、内源激素调控克隆生长构型响应、克隆器官结构与功能响应、觅食行为响应、风险分摊响应、资源共享响应，种群中格局配置响应、生态位分异响应，群落中种间关联、异株克生响应、生物多样性组成响应等内容进行研究，揭示绵刺在进化过程中的适应对策和适应能力，为绵刺保护提供理论依据。

The niche breadth and niche overlap for dominant species of the arbors layer were calculated.

摘 要：以湘中丘陵区石栎群落为调查研究对象，分析了群落的特征，定量计测了乔木层主要树种的生态位宽度和重叠值。

Resources and its artificial cultivation. Using the calculation formula of Shannon-Wiener exponent niche breadth, the niche breadth of E. brevicornum in Jinchengshan forest park of Jialinajiang River basin under different environmental factor range were determined. And the suitable environmental factors for the growth of Jingchengshan F. brevicornum in natural vegetation community were discussed.

方法］采用Shannon-Wiener指数生态位宽度计算公式，对嘉陵江流域金城山森林公园淫羊藿在不同环境因子范围上的生态位宽度进行测定，探讨自然植被群落中金城山淫羊藿生长的适宜环境因子。

Methods The niche breadth was determine using the Levins model, the niche overlap the Colwell?

生态位宽度用Levins模型测定；生态位重叠用Colwell？

Applyed Levins Index corrected by Corwell and Wang gang Index, the niche breadth and niche overlaps of 20 species' in alpine meadow of Bayanbulak were measured at two resource dimension levels.

本文采用Levins提出经Corwell修正指数和王氏重叠指数，在土壤pH值和土壤全盐二维生态因子梯度上，测定了巴音布鲁克高寒草地20种主要植物种群生态位宽度和生态位重叠值。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？