speciation

简明释义

英[ˌspiːʃɪˈeɪʃ(ə)n;ˌspiːs-]美[ˌspisiˈeʃən]

n. [进化] 物种形成

英英释义

单词用法

同义词

反义词

例句

1.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。

2.Speciation may also be induced artificially, through animal husbandry or laboratory experiments.

物种形成也可以通过动物饲养或实验室人工诱导。

3.This paper presents an artificial neural network for the speciation of Chromium.

提出了用神经网络方法测定无机铬的形态。

4.Given the extraordinary diversity of life on the planet, there must be mechanisms for speciation: the formation of two species from one original species.

考虑到地球上的生命的非凡多样性，一定存在着形成物种的机制：从一个原始物种演变为两个物种。

5.Speciation of Zn, Mn, Fe, Ca, Mg in Ligusticum wallichii Franch was analyzed by atomic absorptionspectrometry.

利用原子吸收分光光度法对中药川芎中锌、锰、铁、钙、镁五种元素的形态进行了研究。

6.The question is not regarding the validity of speciation.

这个问题与物种形成论的正确性无关。

7.Charles Darwin, the first to describe the role of natural selection in speciation, wrote about the mechanisms of speciation.

查尔斯·达尔文是第一个描述自然选择在物种形成中的作用的人，他描写了物种形成的机制。

8.The study of speciation 物种形成 helps scientists understand biodiversity.

对物种形成的研究帮助科学家理解生物多样性。

9.Adaptive radiation is a form of speciation 物种形成 where a single ancestor species diversifies into multiple forms.

适应性辐射是一种物种形成形式，其中一个祖先物种多样化为多个形态。

10.Darwin's theory of evolution is closely related to the concept of speciation 物种形成.

达尔文的进化理论与物种形成的概念密切相关。

11.The process of speciation 物种形成 can occur when populations become isolated.

当种群变得隔离时，物种形成的过程可能会发生。

12.Geographic barriers often lead to speciation 物种形成 by preventing gene flow between populations.

地理障碍通常通过阻止种群之间的基因流动而导致物种形成。

作文

Speciation is a fundamental concept in the field of evolutionary biology that refers to the process through which new and distinct species arise from a common ancestor. This phenomenon is crucial for understanding the diversity of life on Earth. The process of speciation (物种形成) can occur through various mechanisms, including allopatric, sympatric, parapatric, and peripatric speciation. Each mechanism highlights different environmental and genetic factors that contribute to the formation of new species.Allopatric speciation (物种形成) occurs when populations of a species become geographically isolated from one another. This isolation can be caused by physical barriers such as mountains, rivers, or human activities that fragment habitats. Over time, these isolated populations may undergo genetic changes due to mutation, natural selection, and genetic drift. As these changes accumulate, the populations may become so genetically distinct that they can no longer interbreed, leading to the emergence of new species.On the other hand, sympatric speciation (物种形成) happens without geographical separation. In this scenario, populations of a species coexist in the same environment but diverge due to ecological niches or behavioral differences. For example, certain fish species in a lake may begin to exploit different food sources or breed at different times, leading to reproductive isolation. This type of speciation (物种形成) emphasizes the role of ecological factors in the diversification of species.Parapatric speciation (物种形成) occurs when populations are partially separated by a geographic barrier but still have some degree of contact. In this case, gene flow between populations is limited, and as they adapt to their specific environments, they may eventually diverge into separate species. This form of speciation (物种形成) illustrates how environmental gradients can influence the evolution of species.Peripatric speciation (物种形成) is similar to allopatric speciation (物种形成) but involves a small population that becomes isolated at the edge of a larger population's range. This small group may experience rapid evolutionary changes due to its reduced gene pool and unique environmental pressures. As a result, they may evolve into a new species while the larger population remains unchanged.Understanding the mechanisms of speciation (物种形成) is essential for conservation efforts, particularly in the face of habitat destruction and climate change. As species continue to evolve, the loss of biodiversity can hinder the ability of ecosystems to adapt to changing conditions. Protecting the processes that lead to speciation (物种形成) is vital for maintaining healthy ecosystems and the services they provide.In conclusion, speciation (物种形成) is a complex and dynamic process that contributes to the rich tapestry of life on our planet. By studying the different mechanisms of speciation (物种形成), scientists can gain insights into how species evolve and adapt over time. This knowledge not only enhances our understanding of biological diversity but also informs conservation strategies aimed at preserving the delicate balance of ecosystems worldwide.