niche [nitʃ]

niche的基本解释

n.

壁龛, 壁橱

• You can then find your own niche in public life.
• 那时候你就可以在社会上找到适合自己的工作了。

• He found the right niche for himself.
• 他为自己找到了一份称心的工作。

vt.

安顿, 放入壁龛

niche的同义词

n. nook · recess · cranny · corner · alcove

niche所属的单词分类

Business / 商务 [280]

win-win  ·  username  ·  prime rate  ·  mouse pad  ·  economy of scale  ·  cold call  ·  bottom line  ·  purchase order  ·  log-in  ·  sales tax

与niche相关的网络例句 [注：此内容来源于网络，仅供参考]

1Niche construction can lead to stable coexistence of diverse genotypes in spatially structured population, which supports a stable polymorphism even without heterozygote superiority.(2)With habitat deterioration, niche construction accelerates the formation of steady polymorphism and hence impedes the harmful influences of environment on the population, which might embody a life-history strategy of organism under the unfavorable environment.(3)Niche construction results in the coexistence with alternative polymorphism through genotype-environment feedback and limited gene flow.(4)The niche-constructing organism is an active force to alter its environment and hence the direction of natural selection in order to better survival.(5)Spatial dynamics and distribution pattern of metapopulation are profoundly influenced by time-lagged niche construction.(6)Metapopulation size can reach a fixed level in the recency effect and equal weighting of time lag but is statistical stability in primacy effect, which implies the primacy effect is most remarkable.(7)The increment in the relative weightingof each generation\' niche construction and the length of time lag are significant factors for system destabilization.(8)Moderate capacity of positive niche construction benefits the metapopulation persistence.(9)The narrowing of niche breadth can decrease the metapopulation size and thereby increase the extinction risk.(10)The coupled function of time lag and niche construction make the system oscillation and generate the spiral wave, spiral-broken and circular wave in heterogeneous habitat.The spatial distributions of metapopulation and resource content are complementary due to a phase lag of their both frequencies.(12)Metapopulation persistence with niche construction depends not only on the balance between colonization and extinction, but also on the balance between the ability of niche construction and natural dissipation of habitat.(13)Metapopula-tion can survive under certain condition when the percent of suitable patches in habitat is lower than the ration of extinction to colonization.(14)Two thresholds exist in the process of transition of habitat quality dynamics from unsuitable to suitable, which include the intensity of niche construction and the initial condition of system.(15)Metapopulation size is positive correlated with the ability of positive niche construction, which means that organism or population who has strongly positive influences on their environment plays an important role to maintain the available habitat.

通过上述几个方面的研究，主要得出以下15条结论：(1)生态位构建可使空间结构种群，甚至是在没有杂合子优势的条件下，形成多种可能的稳定基因型分布模式；(2)随着环境的破坏与恶化，种群的生态位构建作用加速其较早形成稳定多态以阻碍环境对种群的不利影响，解释了有机体在不利环境下的一种生活史对策；(3)生态位构建作用通过基因型—环境反馈机制及有限的基因交流导致基因型多态的稳定共存；(4)有机体的生态位构建作用是一种积极的动力改变环境进而改变其自然选择的方向；(5)生态位构建的时滞作用对集合种群动态和空间分布产生深刻影响；(6)集合种群大小在时滞的崭新效应和等权重效应下达到一固定值，而在首位效应下达到统计稳定，表明首位效应的影响最显著；(7)首位效应下生态位构建相对权重的增量和时滞的长度是影响系统不稳定性动态的关键因素；(8)适中的生态位构建强度有利于集合种群的续存；(9)生态位宽度变窄会减少集合种群的数量从而增加其灭绝风险；(10)时滞和生态位构建的双重作用使系统产生周期振荡，并在异质性环境中产生稳定的螺旋波，破碎的螺旋波和环形波三种分布模式；(11)集合种群与资源含量的空间分布因为相滞而互补；(12)具有生态位构建的集合种群续存不仅取决于侵占率与灭绝率之间的平衡，而且依赖于生态位构建能力同其生境的自然消耗速率之间的妥协；(13)当生境中适合侵占的斑块比例小于其侵占率与灭绝率之比时，生态位构建作用促使集合种群在一定条件下续存：(14)生境斑块的状态从不适合到适合转变过程中存在生态位构建强度和系统初始条件这两个阈值；(15)集合种群的大小同正生态位构建能力正相关，意味着对环境具有较强正作用的有机体对维持有效生境起积极作用。

Although many scholars had attempted to define it, the typical definitions of niche are Grinnell's space niche, Elton's functional niche and Hutchinson's hypervolume niche; Niche metrics include niche breadth, niche overlapping, niche volume and niche dimension, among which niche breadth and niche overlapping are two important indexes that can be used to characterize a species niche and the relationships between species niches.

许多学者都试图给生态位下定义，但最具代表性的当推Grinnell、Elton和Hutchinson分别给出的&空间生态位&、&功能生态位&和&多维超体积生态位&定义；生态位测度包括生态位宽度、生态位重叠、生态位体积及生态位维数等，其中生态位宽度和生态位重叠是描述一个物种的生态位以及物种生态位间关系的重要指标。

It showed that the niche breadth and niche overlapping indexes of the enclosed grassland in 2007 are much lower than in 2006 as a whole; The niche breadth of Artemisia ordosica is bigger than other species in the region in 2002. In 2003, the dominant species were Artemisia ordosica and Salsola ruthenica. Their niche breadth indexes were 0.544 and 0.460 respectively. The results of niche overlapping in 2006 and 2007 also showed that the species with big niche breadth didn't always have big niche overlapping, and the niche breadth and niche overlapping did not have a positive direct linear relation.

结果表明：2007年封育区植物种的生态位宽度及种间的生态位重叠指数总体上较2006年有所降低；2006年黑沙蒿生态位宽度最大，达0.768，是06年封育区的优势种；2007年封育区的优势种为刺沙蓬和黑沙蒿，其生态位宽度值分别为0.544、0.460；2006年和2007的生态位重叠结果均表明，生态位宽度大的物种不一定和其他物种有大的重叠指数，较高的生态位宽度和较高的生态位重叠之间并不存在直接的线性关系；2006年、2007年较高的Pianka生态位重叠指数都出现在生态位宽度较小的物种之间。

与niche相关的网络解释 [注：此内容来源于网络，仅供参考]

niche：利基

这也许是输液产业的一个"利基"(NICHE)产业,其市场专门化太强?亦或是品牌依赖性太大?或者是质量和制造工艺门槛太高?不管出于什么原因,有一点是可以肯定的,那就是在关乎人们生命的特殊领域必要的垄断是被保护的,也是合理的. 那么,

niche：小生境

他们认为,传播学依然处于在学术领域中开创一块属于自己的"小生境"(niche)的过程之中. 传播学以往的研究主要围绕三大议题展开:人类传播的特性,大众传播的效果,以及媒介系统与社会的关系. 每一个议题都有各自的研究路径.

niche：壁龛

随着干细胞研究的不断深入,人们愈来愈重视干细胞在机体组织中的居住环境--壁龛(niche)对干细胞的影响.干细胞的增殖分化行为受其所处微环境的影响.干细胞壁龛通过与干细胞之间的直接和(或)间接作用影响干细胞的命运.壁龛成分-

niche：生态位

过去50年间,人类的扩张已经进入一种新的地球"生态位"(niche). 虽然历史上许多人类社会,比如华夏文明,曾经兴旺发展数百年甚至数千年,但这种持续性却一直是地区性的,是人类文明找到了与(相对局部的地理"生态位"中)其他生命系统和谐共生的方式的结果.

niche market：利基市场

苏宁电器已经能够满足客户数据50%的年...赛门铁克(Symantec)正在为自家的Veritas备份应用程序加添报告特性,以期填补其产品中此前的空白. 此前这个空白为那些众多的小型厂商创造了一个"利基市场"(Niche Market).