人类活动影响下，陆地生态系统和气候系统的相互作用已成为目前全球变化研究的主要科学问题之一。
Interaction between terrestrial ecosystem and climate system with the impact of human activities is one of the key scientific issues in the yield of global change research at the present time.
人类活动导致的区域以及全球性的环境变化，影响大型海藻的光合作用与生长。
Environmental changes in regional or global scales due to industrial activities affect photosynthesis and growth of seaweeds.
另一方面，随着生产力水平的提高和其他因素的影响，人类活动对耕地变化的贡献率不断增大，耕地变化影响因子的作用也存在明显的时间差异。
On the other hand, with enhancement of productive forces and change of other affecting factors, the proportion of human activities affecting on cultivated land continuously increases.
应用推荐