| As one of four great national treasure of China, the crested ibis (Nipponia nippon), belonging to the Nipponia of Threskiornithidae of Ciconiiformes, is the first-grade state protected animal in China. Before 2000, it was ranked among the extremely endangered species (CR) by International Union for Conservation of Nature and Natural Resources (IUCN). Moreover, as long ago as the 20th century 50's, crested ibis was widely distributed in the most areas of China, Korean Peninsula, Siberia, Japan, and so on. However, the crested ibis population was successive extinction during less than one century in Siberia, Korean Peninsula and Japan because of excessive economic development and destroying of its habitat environment. Fortunately, thanks to scientists'field observation for three years, the crested ibis population that had been considered to be extinction was rediscover in Yao Jia Gou region of Yang country of China in 1981. Furthermore, over the twenty nine years hard working, Chinese government and scientist achieved great successful in terms of in and ex situ conservation, wild-exercising and returning nature and reintroduction of crested ibis. By the end of 2009, the amount of crested ibis population was increased from only 7 to more than 1300, in which there was more than 600 wiled population. The remarkable achievements resulted from the conservation and management of crested ibis has became an outstanding example of protection of other endangered species in the world.In this paper, by field survey combining with data collection and consulting document, we studied on (1) the reason for the decline of crested ibis (2)the law of propagation and viable feasible ways of expansion for crested ibis population (3) the relationship between natural conditions of crested ibis and human society (4) the biological characteristics of expansion for crested ibis population under nature condition (5) the biological characteristics of expansion for crested ibis population under manual intervention. More importantly, those theory obtained from above research can be used to provide the scientific basis for crested ibis in further conservation and protecting of other endangered species. All results are reported as follows.1. It is the most successful for the conservation and research of crested ibis in our country. Moreover, the results are approved by the expert and organization all over the world. 2. The propagation and extinction of crested ibis population is closely related to its adaptability and habitat environment.3. It is the effective way to protect crested ibis and other endangered species by scientific research for knowing their ecology and biological characteristics well.4. The optimization and expansion of species can be promoted by the research on the problem occurred in propagation of crested ibis.5. On the other hand, it is very important to protect crested ibis by society and personal together with education.6. With the amount of crested ibis increasing, the biological characteristics of propagation will be changed. For example, the density of nest will be increased and the nest-site will be migrated to lower altitude area.7. It is reference and guiding significance to protect other endangered species with the successful experience from crested ibis conservation. |
