Ecological Niches of Sucking Lice (Phthiraptera: Anoplura) and Their Coevolution Relationship with Small Mammal Hosts in Yunnan, China;

Niche Evaluation on Urban Public Space Quality;

Study on Optimizing Strategies of City Spaces Basing on Niche Theory——A Case in Zengcheng City;

The transition of village in city in the ecological niche of city;

Variation of nutritional structure and ecological niche of arthropod community in plantation of transgenic insect-resistance hybrid poplar 741;

Study on medicinal plant allelopathy and soil sickness based on ecological niche;

Studies on the niches of the main populations in different habitats of the Loess Hilly Region,China;

The niches of major pests and natural enemies between BT cotton and common cotton;

Turf weeds community composition and niches in Pearl River Delta Region in four seasons

The concepts of cultivated land ecounit and cultivated land niche are proposed based on niche theory.

This article introduces the niche theory, which is one of the most important theories, and expounds it′s functions and senses on the research about the city development and city character, the drawing of city economic development stratagem, city development motivity mechanism, city industry layout and it′s adjustment, in order to enrich and expand the theories and methods of city study.

Niche theory is a powerful theoretical and practical tool.

On ecological position of sci-tech periodicals and their existence in differentiation;

The edition correction of Yan’an Liberation Daily was not only the change and adjustment of the Party’s propaganda guiding principle,but also an adjustment of ecological position among the system of national jounalism ecology, further also a sucessful practice for Party and group papers’ survival and development according to the communication law.

The principle of ecological position holds that every species has the ecological position of their own and different species depends on not the same foodstuff for liing, even the same species looks for foodstuff in different time and place.