基于主成分分析法的三亚市生态系统评价

Ecosystem Evaluation in Sanya City Based on Principal Component Analysis

以三亚市2005-2013年间生态系统为研究对象,从自然生态系统、社会生态系统、经济生态系统三大子系统出发,运用主成分分析法对三亚生态系统进行综合评分.三亚市生态系统得分在2005-2006年有小幅回落,2006-2013年不断上升,第一主成分载荷值较大的指标说明人类生活对生态系统的影响加重;第二主成分载荷值较高的指标反映了三亚市工业对生态环境的污染程度和资源的利用程度,数值的起伏说明工业对生态系统的平衡影响有所浮动.三亚市生态系统总体呈良性发展.

Taking Sanya city as the research subject during 2005-2013, from the three sub-systems of the natural ecolog- ical system, social ecological system and the ecological economic system, and by employing the principal component analysis, an overall grading is conducted to evaluate Sanya ecological system. The evaluation shows that the ecological system of Sanya undergoes a slight fall in the years of 2005-2006, and in 2006-2013 the various indices are steadily improving, the rather large load value of the first principal component indicators reveals that human activities have an increasingly severe influence on the e- cosystem; the rather large load value of the second principal component indicators reflects the degree of environmental pollution and resource utilization in Sanya city, the ups and downs in numerical values show that the effect of industry on ecosystem is fluctuating. It is concluded that the urban ecosystem in Sanya is undergoing benign development on the whole.