哈长城市群生态系统服务时空特征及其权衡/协同关系研究

哈长城市群位列国家二级城市群之首,研究哈长城市群地区的生态系统服务变化及权衡协同关系对促进该区域可持续发展具有深远意义。基于多源遥感数据结合InVEST模型及权衡协同度模型(ESTD),分析了哈长城市群2000年、2010年、2015年土地覆被变化;评估了土壤保持、生态系统碳储量及产水量3种生态系统服务的时空分布及其权衡协同关系。结果表明:(1)2000-2015年,哈长城市群内建设用地共增加1462 km²,其中,2000-2010年增长量(958 km²)高于2010-2015年(504 km²),15年间林地共增加1527 km²,草地、耕地及裸地分别减少661 km²,1611 km²,780 km²;(2)15年间土壤保持量持续降低,生态系统碳储量先减后增,产水量先增后减;(3)6种土地覆被类型中,单位面积下林地提供的土壤保持力最高,湿地提供的生态系统碳储量和产水量最高;(4)协同作用在哈长城市群3种生态系统服务间占主导地位;南部的土壤保持-生态系统碳储量及土壤保持-产水量多为协同关系,北部相反,从全区来看生态系统碳储量-产水量间的相关关系相对较弱。研究结果可为哈长城市群地区制定更为全面具体的生态保护策略提供参考依据。

Study on the Spatial-Temporal Characteristics of Ecosystem Services and Tradeoffs/Synergies in Ha-Chang Urban Agglomeration

Ha-Chang urban agglomeration ranks first in the national second-tier city group.Studying the changes of ecosystem services and weighing the synergy between the Ha-Chang urban agglomeration areas is of far-reaching significance to promote the sustainable development of the region.Based on multi-source remote sensing data combined with InVEST model and trade-off synergy model(ESTD),we analyzed the land cover changes in 2000,2010 and 2015 of Ha-Chang urban agglomeration,the spatial-temporal distribution of three ecosystem services,soil conservation,carbon storage and water production,and their tradeoff synergy relationship.The results show that:(1)from²000 to 2015,the total construction land in the Ha-Chang urban agglomeration increased by 1462 km²;among them,the growth rate from²000 to 2010(958 km²)was higher than that from²010 to 2015(504 km²);in the past 15 years,the forest land increased by 1527 km²,and the grassland,cultivated land and bare land decreased by 661 km²,1611 km²and 780 km²,respectively;(2)in the past 15 years,the amount of soil conservation continued to decrease,the carbon storage decreased first and then increased,and the water yield increased first and then decreased;(3)among the six types of land cover,the forest land provided the highest soil conservation capacity per unit area,and the wetland provided the highest carbon storage and water yield;(4)synergism was dominant among the three ecosystem services of Ha-Chang urban agglomeration;the soil conservation-carbon storage and soil conservation-water production in the south were mostly synergistic,on the contrary in the North,from the whole area,the correlation between carbon storage-water production was relatively weak.The results can provide the reference for the development of more comprehensive and specific ecological protection strategies in the Ha-Chang urban agglomeration area.