Exotic Plant Species In Jinfoshan Nature Reserve

Along with the acceleration of global economy integration and trade at home and abroad, Biological invasion has already become a currently global environmental problem. While our production and daily activities are accelerating, the damages caused by biological invasion are becoming more and more serious. The invasive species is pervading gradually from the two flanks of main traffics, dense populated areas and artificial ecosystems to remote areas and natural ecosystems. Natural Reserves also have been affected by invasive species in a certain degree. Apparently this will jeopardize the existence of some rare and endangered species as well as the special ecosystems they are involved in; it also will affect the bio-diversity of Natural Reserves. In that case the losses of Natural Reserves will outweigh those of unprotected areas. Jinfoshan is one of our country's first class Natural Reserves and is set to protect the rare and endangered species such as Tangtsinia nanchuanica S. C. Chen and so on. Once the invasion of invasive species broke out at a large scale, the loss cannot be estimated; therefore investigation of biological invasion must not be delayed. Given the circumstances, the investigations were carried out at Jinfoshan Natural Reserve. By setting samples and using field exploration, we classified the invasive species in the Natural Reserve to obtain the knowledge how did it invade, thus to supply theoretical and data support to the prevention and cure of biological invasion.The paper aims to classify the invasive species at Jinfoshan. The research includes two parts: 1. Investigation of species composition, distribution, quantative attribute as well as the superiority of dominate species in these communities. 2. Investigation and recordation of categories and distribution of invasive species in the Natural Reserve by using field exploration; research of its major harm, indraught route and proliferation mechanism through analyzing the data we gained. The results are as follows:1. The dominate species of 4 altitude grads in south, north and west slopes of the Mountain Jinfo Mountain Natural Reserve were Chinese red pine, Euptelea, variabilis, White oak, Common Camellia, China fir, Hardleaf Oatchestnut, Grass Family. But areas nearby farmhouses and telphers where have been badly interfered by human activities, secondary species has become dominate species.2. So far the total number of invasive species at Jingfoshan Natural Reserve was 56 species, which can be divided into 25 Family. Among them there were 9 species of composite family which take up the largest amount, account for 16.7% of the total invaded species. The second largest was regarded as leguminous family which includes 8 species, account for 14.3% of the total number. From the aspect of source, 23 species of the 56 are come from tropical America, which account for 41.1% of the total. six species were come from Mediterranean coast, which account for 10.7% of the total number. But there was a little species comes from Oceania, tropical Africa and Europe.3. Most of the invasive species distributes at the areas which were seriously affected by human activities, such as roadsides, wastelands, ponds, vegetable yards, tourist spots and so on. In those natural ecosystems which have been less interfered, invasive species was scarce. The invading approach of most invasive species was manual planting, and the rest was natural invasion.