"关于热带方面" can be translated as "regarding/concerning the tropical aspects/areas" or "in relation to the tropics" depending on the context. Here are a few examples:
1、 Regarding the tropical aspects, we need to conduct further research.
（关于热带方面，我们需要进行进一步的研究。）
2、 Concerning the tropical areas, the climate change has a significant impact.
（关于热带地区，气候变化产生了显著的影响。）
3、 In relation to the tropics, we have observed some unique ecological phenomena.
（关于热带，我们观察到了一些独特的生态现象。）