广西石灰岩山区生态系统受害原因探讨

石灰岩山区生态环境很脆弱，自我调节能力一般较低，一旦遭受破坏，迅速恶化，难于恢复，甚至产生不可逆转，变成石质荒山。究其原因有自然条件、社会历史和人为三大因素。由于石灰岩风化成土慢，石多土少，土层浅薄，干旱缺水，植被生长缓慢，动植物的种群和数量均较少，环境容量低，生态系统变异的敏感度高，承受灾变的能力小，而少数民族山区经济社会较落后，许多政治和生产运动超越了其经济社会发展的历史阶段，生态平衡遭到人为的破坏，长期得不到合理的治理，使生态环境日趋恶劣。

Reasons for the Damage of Ecosystem in the Karst Mountain Region of GuangXi

Ecological environment of the Karst mountain region is weak and hao a poor self adjustment. Once being damaged, it regresses rapidly till naked-stone-mountain. Some of the process are irreversible and makes is hard to reconer. All these are owe to three factars natural condito us social histury a nd humean behavior. Natural conditions are dwelled on the things such as show soil forming process of limestone. Mone stone and thinner soil, drought, slow grouth of plants, few populations and quantities, lower evironmental capacity, sensible to ecosystem varision and lower endurance to disaster. Furthemare, in an undeveloped minority region, the ecological balance was damaged by many political and productive movements, which overs superior to the reality stage. Some areas haven's been reasonably treated for a long time. All these make the ecosystem worse and worse.