1, physical geography
Physical geography is a branch of geography. It is a discipline that studies the composition, structure, function, dynamics and spatial differentiation of natural geographical environment, and it is an important branch of geography. According to the characteristics of research, physical geography can be divided into two branches: comprehensive and departmental.
The research object of physical geography is the physical geographical environment, including the natural environment that is only indirectly or slightly influenced by human beings, but the original natural appearance has not changed obviously, and the man-made environment that has been directly influenced by human beings for a long time, which has greatly changed the original natural appearance.
2. Human geography
Based on the theory of man-land relationship, it is a subject that discusses the geographical distribution, diffusion and change of various human phenomena, as well as the formation and development law of regional structure of human social activities. Also known as living geography.
It is one of the two branches of geography. The word "humanity" corresponds to the word "nature" in physical geography, which refers to various social, political, economic and cultural phenomena, while some scholars believe that it only refers to social and cultural phenomena.
Generally speaking, human geography can be divided into broad sense and narrow sense. Human geography in a broad sense includes social and cultural geography, political geography and economic geography, while human geography in a narrow sense refers to social and cultural geography.
3. Ecological environment and natural resources
Ecology originates from biology, focusing on the study of biological individuals, populations, communities and ecosystems. In 1960s, ecology entered a new stage centered on the ecosystem. Ecosystem theory makes people have a deeper understanding of the complexity, variability and versatility of ecosystems, and also provides new ways and methods for people to understand nature.
In particular, the development of ecosystem ecology has strongly promoted the combination of natural science and social science, and greatly promoted the formation and development of environmental ecology. Although the study of ecology still belongs to the category of macrobiology, many new changes have taken place in modern ecology, and the ecosystem has become the key object of discipline research.