一、性质不同 1、observed species指数：observed species指数表示该样品中含有的物种数目。2、chao指数：chao指数估算样品中所含OTU数目的指数。3、ace指数：ace指数评估样本中物种组成的丰富度和均匀度。二、变化不同 1、observed species指数：observed species指数的数值越高表明样品物种丰富度越高。2、c...
简介 1. 物种丰富度指数(Species richness):群落中丰度大于0的物种数之和,一般用Observed OTU(observed species)表示,只有物种种类信息,没有丰度信息;数值范围一般从几百至几千不等,波动范围与研究对象有关; 2. 均匀度(Evenness):用于度量群落中相对物种丰富度,香农均匀度(Shannon’s evenness),又称Pielou均匀度(...
aThe three studied species with low abundance and relatively high mobility were M. athalia, whose Melampyrum host plants grow in low densities along woodland edges, M. diamina, whose Valeriana dioica host plant is short-lived and occurs at periodically disturbed waterlogged grounds, and B. selene...
例句 1. Have you observed any changes lately? 最近你注意到什么变化没有? 2. This behaviour is commonly observed among several species of finch. 这种行为常常可以在几种雀科鸣禽中看到。 来自《简明英汉词典》轻松背单词 | 本站导航 | 英语听力 | 网页版 | 官网微信...
the mothers or their newborn infants was observed, whereas, other females of the mother's own troop attacked them after delivery in two cases. Such daytime delivery may have originated from the circadian rhythm of the species' nocturnal ancestors, who might have given birth during the daytime....
extend previously reported results for these plantations by showing that: (a) plant species diversity was still increased 5 years after planting; (b) this conclusion is not dependent on a choice of index for measuring diversity (rather it is independent of index, or 'index-free'); and (c)...
We investigated the communicative gestures used by chimpanzee and human infants. In contrast to previous studies, we compared the species at the same age (
Additionally, APH1B containing complexes tend to generate longer, more toxic Aβ species upon cleavage of the most well-known γ-secretase substrate, APP [54]. Due to the well-established function of γ-secretase in APP cleavage, it would be expected that there is a stronger relation between...
Converging evidence across mammalian species points to pregnancy as a remarkable period of neuroplasticity, revealing the brain’s ability to undergo adaptive, hormonally-driven neuroanatomical changes beyond adolescence13,14,15,20,21,24,25,26. Investigations that compare women prepregnancy and then again...
Index Seminum Austriae österreichische Genbanken für Kulturpflanzen. Referat Genbank, Bundesanstalt für Agrarbiologie, Linz. Ruckenbauer, P. & A.M. Steiner, 1995. Die agronomischen Eigenschaften des Nachbaues eines 110 Jahre alten Hafers-dieWiener Probe von 1877. Die Bodenkultur 46: 293...