中国是一个幅员辽阔的国家,气候带达5个之多,包括寒温带、温带、暖温带、亚热带和热带。多种多样的生态系统类型为许多外来物种提供了适宜生存的环境,这为它们的入侵提供了便利的条件。从森林、水域、湿地、草地、荒漠戈壁等自然生态区域到农业区、城市居民区等人类活动范围,都 China is a vast country with as many as five climates, including frigid, temperate, warm temperate, subtropical and tropical. A wide variety of ecosystem types provide a suitable environment for many alien species to survive, providing a convenient condition for their invasion. From the natural ecological areas such as forests, water areas, wetlands, grasslands and deserts to the agricultural areas, urban residential areas and other human activities, all