The form of a neutral trait that evolves to dominate in a species is simply a matter of chance. 某种中性特征有时会演变成为在该属种中占支配地位的特征,这纯粹是一种偶然的机会。
Both unified neutral theory and niche theory have played an important role in understanding the mechanisms of species coexistence in tropical rain forests. 中性理论和生态位理论在解释热带雨林中物种共存机制上发挥了重要作用。
Predators and parasitoids had a narrower niche overlap with the target pest, but had a wider niche overlap with the neutral species. 捕食性和寄生性天敌与鳞翅目害虫的生态位重叠均较小,而与腐生和游逛种类的生态位重叠较大;
Unlike the niche-assembly theory, the neutral theory takes similarity in species and individuals as a departure for investigating species diversity. 与生态位理论相反,中性理论不以种间生态位差异作为研究群落结构的出发点,而是以物种间在个体水平上的对等性作为前提。
The influence of molecular weight of PEG, phase compositions, neutral salt species and concentration and pH values on the partition properties for BSA in PEG/ dextran aqueous two-phase system was investigated, considering BSA rich in the bottom phase. 以BSA在PEG/dextran体系的下相富集为目标,研究了PEG的分子量、浓度、dextran浓度以及所加入中性盐的种类与浓度、体系pH诸因素对其分配特性的影响。
The results showed that the neutral insects in early and late rice fields made up 16.98% and 6.82% of the total rice arthropod species, respectively; 在整个稻田节肢动物群落中,稻田中性昆虫物种丰富度的比例,在早稻和晚稻分别为16.98%和6.82%;
The theory also asserts that most of the genetic variability withins species at the molecular level ( such as protein and DNA polymorphism) are selectively neutral or very nearly neutral and that they are maintained in the species by the balance between mutational input and random extinction. 还认为在分子水平上,大多数的种内变异(如蛋白质和DNA多态)是选择中性或近于中性,它们能够保持在种内是由于突变的产生和随机消失之间的平衡引起的。
Primary ions react with neutral species to produce different secondary ions. 初级离子与中性质点反应生成各种次级离子。
Furthermore, the protonation processes of some important neutral species are especially important in ionic environments or interstellar space. 另外,质子化反应是化学和生物学中最简单但是又是最重要的反应之一,尤其是一些重要中性分子的质子化反应在离子化学条件下和星际空间中都是非常关键的反应。
Neutral, positive, inhibitive effect varies with the different competition species. 中性、促进、抑制作用随竞争物种的不同而不同。