Why? Is it only because tropic zone has a higher temperature?

为什么会出现这种情况？仅仅是因为热带比寒带更热？

youdao

The proportion of alien invasive species originating from the tropic zone was close to that from temperate regions. The proportion of alien invasive plants caused by intentional introduction was 39%.

外来入侵物种中热带来源与温带来源比例相当，人为引入导致的外来入侵植物高达39%。

youdao

The proportion of alien invasive species originating from the tropic zone was close to that from temperate regions. The proportion of alien invasive plants caused by intentional introduction was 39%.

外来入侵物种中热带来源与温带来源比例相当，人为引入导致的外来入侵植物高达39%。

youdao