Analysis on dynamic ecological security and development capacity of 2005-2009 in Qinhuangdao, China

According to principles and methods of the ecological footprint, a time series of the ecological footprint was measured between 2005 and 2009 in Qinhuangdao City. The results showed that per capita the ecological footprint of Qinhuangdao City declined 3.56% from 1.847040hm2 per person to 1.781227hm2 per person in the past 5 years. However there is no significant change in per capita ecological carrying capacity with upward trend overall. Ecological deficit in Qinhuangdao increased year by year. The ecological security was at level. The pressure on the ecosystem of Qinhuangdao is so large that the economic and social developments were in a state of unsustainable development. Ecological footprint diversity of Qinhuangdao during 5 years was measured according to different land types and development capacity of Qinhuangdao was analysed by Ulanowicz formula of the development capacity