基于InVEST-Biodiversity模型的闽江流域生境质量变化评价

Evaluation of change in the ecological quality for Minjiang River Basin based on the InVEST-Biodiversity model

基于InVEST模型的Biodiversity模块,测定闽江流域的生物多样性生态服务功能,运用模型结果中的生境质量指数和生境稀缺度指数评估闽江流域生态环境质量,对区域生态环境保护具有参考价值。经模型运算得到:2000年、2005年、2010年闽江流域生境质量指数得分分别为27.90、27.82、27.79,10年间下降了0.39%,2005—2010年期间较2000—2005年期间下降速率降低了62.50%;台江、鼓楼、仓山、长乐地区是生境质量较低的地域,其生境质量指数得分10年间均值为0.15、0.23、0.33、0.53;道路、居住地、工业用地、采矿场4种地类对闽江流域生态环境的干扰是生境质量变化的主要驱动因素;森林地类生境稀缺度指数下降了89.80%,生境质量指数10年间均值为0.99,占地面积增加了0.09%。研究表明,10年间闽江流域整体生境质量处于良好水平,且保持稳定。

Based on the Biodiversity module of InVEST model,the ecosystem service functions of the Biodiversity for Minjiang river basin were determined,and the ecological environmental quality was evaluated using the habitat quality index and habitat scarce index in model results,which had reference value to the regional ecological environment protection.The habitat quality in-dex scores of Minjiang river basin in 2000,2005,and 2010,were 27.90,27.82,and 27.79,respectively,which decreased by 0.39% in 10 years.The falling rate of the habitat quality index score in 2005-2010 decreased by 62.50% than that in 2000-2005. The regions with low habitat quality were Taijiang,Gulou,Cangshan,and Changle,of which the averages of the habitat quality index score in 10 years were 0.15,0.23,0.33,and 0.53,respectively.The influences of road,residence,industrial land,and mining land on the ecological environment were the main factors to affect the change in the habitat quality.The habitat scarcity index of the forest was decreased by 89.80%,and the average habitat quality index was 0.99,and the area of the forest land in-creased by 0.09%.The resutls demonstrate that the overall habitat quality for Minjiang river basin in 10 years shows good level and stability.