Now about the second solution, relocating Torreya far from where it currently grows. Well, lets look at what happened when humans helped another tree, the black locust tree, move north to a new environment. When they did this, some of these plants and trees were themselves already in danger of becoming extinct.
现在说一下第二个方法,就是把香榧种在远离它们原来生长地的区域。恩,让我们看看人类帮助另一种树的。人们把洋槐树向北移,移到了一个全新的环境。这么做了之后,当地一些本来已经濒危的植物或者树木因而灭绝了。
Third, research centers are probably not a solution either. Thats because the population of Torreya trees that can be kept in the centers will probably not be able to resist diseases. For a population of trees to survive a disease, it needs to be relatively large and it needs to be genetically diverse. Tree populations in the wild usually satisfy those criteria, but research centers would simply not have enough capacity to keep a large and diverse population of Torreya trees. So, trees in such centers will not be capable of surviving diseases in the long term.
第三,移到研究中心也不是一个有效的方法。这是因为研究中心能够保护的香榧的数量不足以帮助香榧抵御病虫害。如果一种树木想要抵御病虫害,就需要它的数量达到一定规模,并且具有基因多样性。在野外生长的树木一般可以满足这些要求,但是研究中心没有能力保护数量足够多,基因足够多样化的香榧树。所以,长期看来,这样的研究中心是不能保证香榧树抵抗病虫害的。
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