三峡库区重庆段土地覆盖和生物多样性功能演化及预测

发布时间：2018-06-30 20:17

本文选题：土地利用 + 土地整治　；参考：《农业工程学报》2017年19期

【摘要】：为研究三峡库区(重庆段)2005—2020年土地覆盖和生物多样性功能演化情况,对景观格局进行动态分析,该文结合重庆市生态保护红线划定成果,综合运用CA-Markov模型和In VEST模型对区域2005-2020年的土地覆盖和生物多样性功能的演化及趋势进行研究,在运用CA-Markov模型对2020年土地覆盖进行模拟预测的基础上,运用In VEST模型进行生物多样性功能的定量计算。结果表明:1)2005—2010年和2010—2015年,各类土地覆盖面积和土地覆盖动态度分别呈现"四增二减"和"三增三减"的状态;2)CA-Markov模型模拟预测时Kappa系数达到0.92,表明模型的普适性较好;3)4期生境退化指数最高值变化为:0.168 1→0.207 1→0.190 9→0.181 2,城区周边和长江、嘉陵江、乌江沿岸区域的生境退化指数高,东北部大巴山区域的生境退化指数较低;4)大巴山、武陵山、四面山等区域的生境质量较好,长江、嘉陵江沿岸生物多样性功能较差,4期生境质量总得分和平均得分分别为34 337 710、36 829 020、36 345 590、35 530 500和0.513 9、0.551 2、0.543 9、0.531 7;5)15年间生物多样性功能出现不断上升的趋势,由大范围的波动转为小区域变化,整个区域的生物多样性功能逐渐趋于稳定。
[Abstract]:In order to study the evolution of land cover and biodiversity in the Three Gorges Reservoir Area (Chongqing section) from 2005 to 2020, the dynamic analysis of landscape pattern was carried out. This paper combined with the red line of Chongqing ecological protection, and comprehensively applied the CA-Markov model and the In VEST model to the evolution and evolution of the land cover and biodiversity function of the region for 2005-2020 years. On the basis of the simulated prediction of land cover in 2020 by using the CA-Markov model, the In VEST model is applied to the quantitative calculation of biodiversity function. The results show that 1) 2005 - 2010 and 2010 - 2015, all kinds of land cover area and land cover dynamic attitude show "four two minus" and "three three minus". State; 2) the Kappa coefficient of the CA-Markov model is 0.92, indicating that the model is universally suitable; 3) the highest value changes of the habitat degradation index in the 4 period are 0.1681, 0.2071, 0.1909 to 0.1812, and the habitat degradation index in the surrounding area of the city and the Yangtze River, the Jialing River and the Wujiang coastal region is high, and the habitat degradation index of the Dabashan area in the northeast is low; 4) The habitats of dababan, Wuling Mountain and simian mountain are of good quality, and the biological diversity of the Yangtze River and the Jialing River is poor. The total score and average score of the 4 stage habitat quality are 34337 710,36 829 020,36 345 590,35 530500 and 0.513 9,0.551 2,0.543 9,0.531 7; 5) the trend of biodiversity function rising continuously during the 15 years. The large scale fluctuation has changed to the small area, and the biodiversity function of the whole region has gradually stabilized.
【作者单位】：吉林师范大学旅游与地理科学学院;重庆市环境科学研究院;
【基金】：吉林省科技发展计划项目(20150204047SF)
【分类号】：P901;Q16

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