speciation

音标发音

Microevolution looks at changes within species overtime — changes that may be preludes to speciation, the origin of newspecies.
物种的微观进化随时都在发生——变化可能导致物种形成，这就是新物种的起源。
Some researchers have argued that speciation rates, both terrestrial and marine, could be much higher in the tropics, making them a "cradle" of biodiversity.
一些专家认为，在热带地区的陆地和海域，物种形成的机率更高，这样就使热带地区成为了生物多样性的摇篮。
Researchers usually link speciation to some sort of physical barrier, such as a river or mountain, which divides populations and causes them to evolve independently.
研究人员通常把物种形成与某种物理屏障相联系，如河流或山脉，这种屏障分隔种群，使它们独立进化。

The dominant theory of speciation is that it results from a slow accumulation of genetic mutations.
ECONOMIST: Genes are not all there is to heredity
Boeke says that when more of the yeast genome is synthesized, researchers will be able to use the system to study evolution and speciation.
FORBES: Yeast Goes Synthetic
So the epigenetic hypothesis of speciation has an edge.
ECONOMIST: Genes are not all there is to heredity

the process by which new types of living things are thought to develop from existing ones during evolution

the evolutionary development of a biological species, as by geographical isolation of a group of individuals from the main stock

形态
Accompanying anions (OAC-, NO3-) had influence on the chemical speciation and transformation process of heavy metals complicatly as the time went on.
陪伴阴离子(OAC-、NO3-)对土壤中的重金属赋存形态随时间变化的影响比较复杂。
物种形成

形态
Speciation analysis of trace elements is new subject.
元素的形态分析是一新兴研究课题。
生物学
种态
In this work, a novel comprehensive approach was developed to evaluated selenium speciation in selenium-enriched yeast.
本文提出了一种新颖的、系统的、全面的对富硒酵母中硒化学种态的研究方法。
种别形成
种形成
物种形成
线系成种