Abstract: Taking Huanghua City as an example, the impacts of spatial and quantitative land use changes on ecosystem service values during urbanization were analyzed. We developed an ecosystem service flow gainandloss matrix and established an assessment model to assess the impacts of urbanization on ecosystem service values. Meanwhile, a human activity intensity index (HAI) was introduced to analyze the spatial differentiation of regional ecosystem service values resulting from the interference of human activities. The results showed that increased urbanization significantly affected the value of ecosystem services. From the flow of ecosystem service value gains and losses, the construction land due to the urbanization resulted in ecosystem service value losses of 76.56 million yuan, which accounted for 44.57% of the total decreased value of ecosystem services during 1990-2011. Spatially, human activity intensity was dominated by low impact strength and high impact strength, and high impact strength mainly distributed in surrounding and eastern coastal areas of Huanghua City. During 1990-2011, the total disturbance continued to increase, with an average increase of 21.43%. The area with great change of activity intensity was also the region with rapid urbanization, with an increase of HAI over 50%.

Key words: bryophyte, diversity, canonical correspondence analysis., cluster analysis