我觉得种子传播可能是一个因素。
一些生物学家称，海洋洋流和空气气流是植物种子传播到夏威夷的原因。
Some biologists argue that ocean and air currents are responsible for the transport of plant seeds to Hawaii.
为了繁殖，植物必须将种子传播到其他地区。
In order for plants to reproduce, they have to spread their seeds to other areas.
种子和花粉是随风传播的。
这些种子由风传播。
这些种子是由风传播的。
只有那些有办法向这些岛屿传播种子的物种才能进行长途跋涉。
Only those species with ways of spreading seeds to these islands were able to undertake the long journeys.
种子由其他媒介，如风所传播。
我的意思是，如果种子不能真正地在野外传播，那么树木就不能在新的地方生长。
I mean if the seeds cannot really disperse in the wild area, then the tree may not colonize new areas.
显然，仅依靠种子生存或传播的植物物种更容易受到植物繁殖力下降的影响。
Plant species dependent solely on seeds for survival or dispersal are obviously more vulnerable to any decrease in plant fecundity that occurs.
将大象引进到这个生态系统中可能就会帮助传播大颗粒种子了，正如它们的祖先一样。
Introduce elephants into that ecosystem and they might disperse those large maclura seeds, like their ancestors did.
种子是怎样传播的？
它主要通过地下茎传播；当根系统碎片或整个植物漂浮到一个区域并生根，或当种子漂浮到一个合适的区域并发芽时，菌落就形成了。
It spreads primarily by underground stems; colonies form when pieces of the root system or whole plants float into an area and take root or when seeds float into a suitable area and germinate.
另一个例子就是巨型动物和本地植物群的相互联系，尤其是那些仅依赖动物传播种子的植物。
Another example is the interaction of megafauna with local flora, in particular, plants that rely on animals to disperse their seeds.
蚂蚁也有助于传播种子。
其他植物利用风来传播种子。
一些动物帮助植物传播种子。
把所有受感染的东西消除掉，也是在已建立的种子园中限制密环菌传播的办法。
The removal of infected materials also restricts the spread of Armillaria in established orchards.
把所有受感染的东西消除掉，也是在已建立的种子园中限制密环菌传播的办法。
The removal of infected materials also restricts the spread of Armillaria in established orchards.
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