And so that's just another idea on how fast speciation can occur.

因此，这仅仅是关于物种形速度另一种观点。

So we want to turn to talk to speciation.

所以我们想转向讨论物种形。

It drives a lot of that diversity, both in speciation and in morphological diversity.

它推动了物种形和形态多样性方面大量差异。

Speciation is the process by which new species form, often when populations separate and evolve differently.

物种形是指新物种形程，通常发生在种群分离并各自独立演化情况下。

There hasn't been any, like, new speciation since we started formally distinguishing different bird species.

自我们开始正式区分不鸟类物种以来，并没有发生新物种形。

And so being able to have a precise chronometer we can relate things like speciation events, or dispersals of various life forms.

我们可以通过一时钟将各种事件关联起来，比如物种起源或各种生命形式分散等。

Now if we put that aside, there's been a debate going on over the actual rate of speciation.

现在，让我们暂时放下这话题，关于物种形实际速率，学界一直存在争议。

But what we do know about speciation is it starts with reproductive isolation.

但我们所了解物种形过程始于生殖隔离。

The belief that through time, so if we put t in this direction, speciation occurs gradually over time.

人们普遍认为， 随着时间推移， 如果我们沿着这方向放置时间（t），物种形是逐渐发生。

This video is on speciation and extinction.

本视频探讨是物种形与灭绝。

And kind of the cool thing is that they keep changing, and their rate of speciation is really pretty incredible.

其中相当酷一点是，它们持续不断地变化，其物种形速率实非常惊人。

But essentially in speciation you go from one species to two.

但本质上，在物种形过程中，一物种会分化两。

This is on reproductive isolation and speciation.

本文探讨是生殖隔离与物种形。

I worked on the problem of speciation or the origin of species, which is, of course, the title of Darwin's 1859 book.

我研究过物种形或物种起源问题，这当然是达尔文1859年那本书书名。

The role of allopatry, species interactions, and other processes in driving speciation is a prime interest of today's guest, Trevor Price.

异域分布、物种相互作用及其他过程在推动物种形中作用，是今天嘉宾特雷弗·普赖斯主要研究兴趣。

So there are two things kind of in play with speciation and extinction.

因此，在物种形和灭绝过程中，有两方面因素在起作用。

But as that environment changes it can force speciation and that environment can also force extinction.

然而，随着环境变化，它可能促使物种形，时也可能导致灭绝。

And so there's this play between evolution, environment, and then speciation and extinction.

因此，化、环境与物种形和灭绝之间存在着一种互动关系。

So let's start with speciation and let me give you a real example of that.

那么，我们从物种形开始，让我给你一真实例子。

Today on Big Biology, we talk with Trevor about his research on speciation in birds and the evolution of reproductive isolation and incompatibilities.

在今天“大生物学”节目中，我们与特雷弗探讨了他关于鸟类物种形、生殖隔离及不兼容性化研究。