摘要
为了对受损常绿阔叶林生态系统退化程度进行定量评价，在浙江天童亚热带常绿阔叶林生态系统研究的基础上，以地带性顶级群落——栲树林为参照，选取不同退化程度的次生类型：木荷林、马尾松＋木荷林、马尾松林、灌丛以及裸地，从轻到重分别代表5种不同退化程度。根据对这5种退化阶段群落的观测结果，从生态系统的组成结构、功能和生境3方面选取了43项指标，再运用主成分分析、无重复双因素方差分析等数学分析方法经过两轮筛选，得到了一个包含13项指标的常绿阔叶林生态系统退化程度诊断的指标体系。根据层次单排序的结果，进行层次总排序，在得到各级指标的权重基础上，构建了常绿阔叶林生态系统退化综合评价模型，并就模型分析结果，用生态退化指数将常绿阔叶林的退化程度分为5级：Ⅴ级——极端退化（〉0．75），Ⅳ级——重度退化（0．59—0．75），Ⅲ级——中度退化（0．52—0.59）、Ⅱ级——轻度退化（0．18—0．52）和Ⅰ级——正常（〈0．18）。再利用鼎湖山国家自然保护区有关退化植被的研究数据对模型进行了验证，评价结果与模型所给出的退化评价标准较为符合，表明了本评价指标体系和模型的适用性。
In order to quantitatively assess the degradation degree of damaged evergreen broad-leaved forest ecosystem, we constructed an assessment model based on the studies of evergreen broad-leaved forest ecosystem in Tiantong National Forest Park, Zhejiang Province, which includes the undamaged climax community, i.e., Castanopsis fargesii forest, and five secondary communities with different degree of degradation, ordering from lower to higher： Schima superba forests, Pinus massoniana ＋ Schima superba forests, Pinus massoniana forests, shrubs and bare land, respectively. Forty-three parameters concerning structure, functioning and habitat of ecosystem obtained from the above mentioned communities were selected as candidate factors by one-way ANOVA. After using principle component analysis and two-factor without replicated ANOVA, a model including 13 parameters was gained after two times of Screening. Using hierarchical analysis, we proposed index for each parameters and its weight. An integrated model to assess degradation degree was constructed with these indices. After given a standard value,degradation of each community was classified into one of the five categories ： extra-heavy degradation （ 〉 0. 75）, heavy degradation （0.59 - 0.75）, medium degradation （0.52 - 0.59）, slight degradation （0.18 - 0.52） and normal （ 〈 0. 18）. We also verified the model with the data of evergreen broad-leaved forest in Dinghu Mountain National Reserve of Guangdong Province, and assessments were in accord with the actual situation.
出处
《生态学报》
CAS
CSCD
北大核心
2006年第11期3749-3756,共8页
Acta Ecologica Sinica
基金
国家自然科学基金重点研究资助项目(30130060)~~
关键词
受损常绿阔叶林
退化程度评价
指标体系
模型
damaged evergreen broad-leaved forest ecosystem
assessment of degradation degree
index system
model
