生物多样性对城市生态系统服务功能的影响

生物多样性是生物及其与环境形成的生态复合体，以及与此相关的各种生态过程的总和，具有十分重要的价值，是人类生存的物质基础。本文在分析我国城市生物多样性的现状和特征的基础上，论述了生物多样性在支撑城市自然生态亚系统、提高城市空气质量、修复污染土壤、降低噪声、改善土壤状况增加空气湿度、降低城市热岛效应、提供居民食品与医药及工厂原料、影响城市生态安全方面的作用；提出完善政策与法规，开展入文教育，拓展国际合作，确定保护优先序列和分层次保护机制，建设生态园林，防止生态入侵是避免城市生物多样性衰减的有效对策。

Effect of Biodiversity on the Services Function of Urban Ecosystem

Bio-diversity is living beings and ecology complex body and this relevant total of different ecological course formed with the environment, it is a material base of the human survival to have very important value. This text is on the basis of analysing the current situation and characteristic of the urban bio-diversity of our country, support the inferior system of the urban natural ecology after describing bio-diversity, improve urban air quality, repair the pollution soil, reduce the noise, improve the soil state and increase the air humidity, reduce the effect of ＂heat island＂ of city, offer food and medicine and factory raw materials to residents, influence the function of the urban ecological security; Propose perfecting the policy and regulation, launch the humane education, expand international cooperation, confirm that protects the array of having priority, protect the mechanism by different level, build the ecological garden, prevent ecology from it invades to be to prevent urban bio-diversity effective countermeasure of decay from.