查询词典 niche

The spatial,temporal and two-dimensional niche breadths and niche overlaps of Hyalopterus amygda/i, Myzus persicae and their main natural enemies were studied in this paper. The results showed that the synchronism and sympatry of the pests and their natural enemies Harmonia axyridis, Propylaea japonica and Chrysopa septempunctata were both higher, which provided a foundation for protecting and using natural enemies to control the two pests.Key words: Hyalopterus amygdali; Myzus persicae; Natural enemies; Ecological niche

为了保护利用天敌，充分发挥天敌对害虫的自然控制作用，作者对桃粉蚜、桃蚜及其主要大敌在时间维度、空间维度和时—空二维生态位宽度和生态位重叠进行了研究，评价了4种主要大敌异色瓢虫、龟纹瓢虫、大草岭、蜘蛛对这2种害虫在时间和空间上的跟随作用和控制效果，为桃园桃粉蚜、桃蚜两种害虫的生态控制提供理论依据。

The alternation of anorganism's niche is around the basic niche point,and when essentialand/or unessential resource is lacking,the niche of organism shows adifferent strategy for adaptation.

在必需资源和/或非必需资源缺失的情况下，生物生态位表现出不同的变化和适应对策。

The results showed that the niche breath of 9 species are wide, and that the species are pioneer in mine spoil Nanjing Mufu Mountains, the niche breath of Broussonetia papyrifera is wide, but the niche overlap with other species is little.

结果表明：研究的9个树种的生态位总体比较接近，都有比较宽的生态位，从群落形成的时间分析，这些树种是在矿区废弃地上的先锋树种，对废弃地有较强的适应能力。

If we want to achieves this aim, we need to reslove the connotation, content, function and characteristic of enterprise niche optimization, overall explanate the importantance of enterprise niche optimization, rational construct the strategic system of enterprise niche optimization.

这一目标的顺利实现既离不开对企业生态位优化的内涵、内容、职能和特点的系统解析，也离不开对企业生态位优化的重要性的全面阐释，更离不开对企业生态位优化策略体系的合理建构。

And the degree of a species niche hypervolume diffuse within the niche space is described with niche diffusion index.

物种的实现生态位中心点到理论生态位中心点的距离称为生态位偏离，而物种在生态位空间扩散程度以生态位扩散指数表示之。

Deviation from the realized niche center of leading dominant species to the theoretical niche center of the community niche hypervolume appears to be much smaller than that of other species, indicating their affinities to the present array of soil variables.

优势种群的实现生态位中心点与理论生态位中心点的偏离明显低于其它种群，表明它们较适应现有的土壤因子状况。

Each condition or resource which defines the niche of an organism contributes one dimension to the space in which the organism's niche, and is the multidimensional niche space, or'n-dimensional hypervolume'.

定义有机体生态位的每一个条件和资源，对于有机体能出现的空间提供一个维度。一起考虑所有维度，全面确定的有机体的生态位，是多维生态位空间，或&n-维超体积&。

The larger the niche overlap of two species is, the more similarly resource space they occupy. the niche overlap of Leontopodium leontopodioides and Polygonum viviparum amounts to 0.892 (in the community Ⅰ). This proves that they are very similar in utilizing the resources. In the general community, the niche overlaps among species are very low.

两个种群的生态位重叠值越大，说明它们占据越相似的资源空间，珠芽蓼和火绒草的生态位重叠值高达0.892，说明它们利用资源的相似性程度很高；在总群落中，各种群之间生态位重叠值都很低。

Analyzed the intraspecific and interspecific relationship of Bruguiera gymnorrhiza and Rhizophora stylosa with commonly used niche calculation formula and Hegyi single-tree competition index mode, the results showed that they had extreme similar niche breadth and high value of the niche overlap index.

文章采用常用的生态位宽度、生态位重叠计测公式和Hegyi竞争指数模型，研究木榄和红海榄种内以及种间的相互关系。

The results showed that in the enclosed area in the natural recovery process, the constructive species of Stipa niche width became larger and the dominant populations niche width presented reducing trends and the majority of the remaining population niche width was gradually increasing.

结果表明：在围封自然恢复进程中，建群种针茅的生态位宽度较大，主要优势种群的生态位宽度呈减小趋势，其余大部分种群生态位宽度逐渐增大。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。