当前位置:首页>林业>【林业科学2026】基于生态系统健康的川滇生态屏障区生态安全格局构建

【林业科学2026】基于生态系统健康的川滇生态屏障区生态安全格局构建

  • 2026-02-10 12:56:10
【林业科学2026】基于生态系统健康的川滇生态屏障区生态安全格局构建

摘 要:【目的】构建生态系统健康评估框架与综合阻力面,识别川滇生态屏障区生态源地和关键节点,为研究区生态安全格局优化奠定基础,为生态保护与修复提供科学依据。【方法】基于2021 年多源基础数据和“生态活力−组织力−恢复力−生态系统服务”框架,利用InVEST、Fragstats 和TerrSet 等软件,评估研究区生态系统健康空间分布,确定最优生态源保护方案;采用随机森林模型计算未来土地利用发展概率,结合自然和社会因子构建综合生态阻力面,应用电路理论模型构建研究区生态安全格局。【结果】2021 年,研究区生态系统物理健康指数、活力、组织力和恢复力均呈现明显的空间分异。生态系统物理健康指数和活力平均值分别为0.533 和0.546,呈南高北低分布,高值区主要分布在生态系统类型多样、野生生物资源丰富、植被覆盖率较高及水资源充足的南部、西南部、中部和北部;西北部和东部的生态系统物理健康和活力水平较低。组织力平均值为0.583,受地形阻隔影响,高值区多分布在地势平坦、交通连通性较好、植被覆盖度高、有河流穿越的区域;低值区集中于岷山、米仓山、邛崃山、大凉山和高黎贡山等地形复杂地区。恢复力平均值高达0.667,西部和西北部因过度放牧引发草地退化、盐碱化和沙化等问题而呈低值,城镇发达、耕地密集和湖泊所在地也为低值区。生态系统健康分布呈西部、西北部、东部和东南部较低,东北部、中部和南部较高的格局。综合生态阻力面平均值为32.716,与生态系统健康分布趋势相反。生态安全格局共包含210 块生态源地,面积66 990.64 km2,占总面积的28.28%;生态廊道511 条,总长度达5 951.475 km;在空间分布上呈现出西部密集、东部稀疏的特征。一般生态廊道( 250 条)长且分散,连接较远生态源;重要生态廊道( 178 条)短而密集,与一般廊道形成廊道网络;核心生态廊道( 83 条)连接面积较大源地。共识别出143 个生态夹点和248 个生态障碍点, 主要分布于一般生态廊道上, 以草地、其他用地和耕地为主。【结论】本研究揭示出川滇生态屏障区生态系统物理健康的区域差异,生态系统健康整体呈南北高、东西低分布格局。东北部、中部和南部是生态源地和夹点的集中分布区,应优先保护自然植被的完整性;阿坝州、甘孜州和香格里拉地区受自然与人为活动的影响显著,应重点修复;应进一步优化东北部和南部地区的空间规划,协调生态与经济的可持续发展。

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  1. CONNECT:[ UseTime:0.000349s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000528s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000303s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000240s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000516s ]
  6. SELECT * FROM `set` [ RunTime:0.000205s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000558s ]
  8. SELECT * FROM `article` WHERE `id` = 464971 LIMIT 1 [ RunTime:0.000571s ]
  9. UPDATE `article` SET `lasttime` = 1770831409 WHERE `id` = 464971 [ RunTime:0.005168s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.001013s ]
  11. SELECT * FROM `article` WHERE `id` < 464971 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.002107s ]
  12. SELECT * FROM `article` WHERE `id` > 464971 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000437s ]
  13. SELECT * FROM `article` WHERE `id` < 464971 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.006122s ]
  14. SELECT * FROM `article` WHERE `id` < 464971 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002135s ]
  15. SELECT * FROM `article` WHERE `id` < 464971 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.007133s ]
0.150373s