海岛森林健康状况评价及影响因子分析

Evaluation of island forest health status and analysis of influencing factors

海岛森林生态系统复杂,森林健康影响因子众多,经营管理措施各异,国内外为对其研究也缺少系统和科学性。本文以长岛南长山岛为研究对象,依据森林健康、生态学等理论,从结构、功能与森林健康的关系入手,分析林分密度、胸径、立地条件等因子对森林健康的影响,评估森林健康状况。结果显示,南长山岛森林健康总体处于较差状态。分析认为,海岛生态系统的脆弱性是长岛森林健康状况的基本影响因素,病虫害和干旱是导致森林健康下降的主要原因。长岛急需进行森林可持续经营,提高森林健康等级,恢复森林生态系统功能。

Island forest ecosystem is complex,with many factors affecting forest health and different management measures.Therefore,domestic and foreign researches on forest ecosystem are not systematic and scientific.Taking Beichangshan of Changdao island as the research object,based on the theories of forest health and ecology,this paper analyzed the effects of stand density,DBH,site condition and other factors on forest health,and assessed the forest health status from the relationship between structure,function and forest health.The results showed that the forest health of Beichangshan was in poor or very poor state.The analysis shows that the vulnerability of island ecosystem is the basic influencing factor of forest health in Changdao Island,and the main reasons for the decline of forest health are pests and diseases and drought.There is an urgent need for sustainable forest management,improvement of forest health and restoration of forest ecosystem functions in Changdao.