The successive variation in ecosystem service value of farmland in Miaodao archipelago from 1950 to 2000 is analyzed by using ecological and economics methods.

利用生态学和经济学统计方法分析了1950-2000年庙岛群岛海岸带农田生态系统服务价值的演替变化。

Population structure is an important category of human capital economics, demography, economics, sociology, environmental and ecological research fields such as an important content.

人口结构是人口学的一个重要范畴，也是人力资本经济学、经济学、社会学、环境学、生态学等领域学科研究的重要内容。

Population, environment, economics research results tell us: the productivity of certain conditions, population growth and ecological environment should be the affordability of them.

人口环境经济学的研究成果告诉我们：在一定的生产力条件下，人口的增长应当与生态环境的承受力相适应。

This paper has analyzed the ecological meaning of minimalism and landscape design in the aspects of design ideas, materials, visualness, economics and spatial order.

本文从设计观念、材料、视觉、经济、空间秩序几个方面分析了极简主义景观设计的生态学意义。

By comprehensive utilization of biogas rural economics and eco - environmental sanitation can be improved and good ecological cycle can be formed.

开展沼气综合利用，能够促进农村生态环境的良性循环，改善农村环境卫生条件。