桉树人工林生态量化评价指标体系的建立

Establishment of Quantitative Indicators for Ecological Evaluation of Eucalyptus Plantations

随着桉树人工林经营水平的提高,桉树人工林不仅满足木材的需求,还发挥生态效益等其他功能。本文通过专家咨询法对桉树人工林生态目标量化评价指标进行筛选,采用层次分析法和德尔菲法确定指标的权重,最终形成5个一级指标、18个二级指标、36个三级指标的指标体系。一级指标中,碳汇权重最大,达0.294 4,体现了碳汇在现今生态系统中的重要程度。第二是生物多样性,达0.271 5,生物多样性是评价生态系统的核心指标。第三是生态系统健康,权重为0.236 3,生态系统健康是生态系统的基础,生态系统其他功能的发挥程度取决于生态系统健康的程度。生态系统水环境和生态系统土壤环境的权重分别是0.102 9和0.094 9。

Plantations are an important component of China＇s forest resources, particularly with respect to wood supply. In southern China, Eucalyptus species are some of the most significant forest plantation species With improvements in Eucalyptus plantation management, these plantations can be increasingly productive and as well as timber supply, they can serve other important functions, such as the eco-efficiency. This paper examines the application of the Delphi method for setting quantitative indicators for ecological evaluation of Eucalyptus plantations, with indicator weights being determined through the Analytic Hierarchy Process （AHP）. These methods resulted in the identification of 5 first-level indicators, 18 second-level indicators and 36 third-level indicators system. In the first-level indicators, Carbon Sink achieved the highest weighting （0.294）; reflecting its importance in the ecosystem. Biodiversity achieved a weighting of 0.272, identifying it as the second most important index; biodiversity is always a core indicator for evaluating ecosystem health. Ecosystem Health itself achieved a weighting of 0.236 and was the third most important index; many other functions of ecosystems depended on health of the ecosystem. Ecosystem Water and Ecosystem Soil achieved weights of 0.103 and 0.095 respectively.