摘要
由于森林景观内部生物机制与外部环境相互作用,不同的森林景观类型存在生态功能流的传递与交换,在同一环境条件下,会因为其生物学特性的差异产生不同的相互作用.根据这种森林景观类型在环境适宜性测度上的相互作用的程度,借鉴生态系统的"生态位",提出森林景观类型环境耦合度的概念,并建立了相应的模型.研究表明:(1)森林景观在环境资源利用上互相补充、互相干扰,从而衍发耦合.耦合可能会带来系统的进化,产生新的结构与功能.(2)耦合度大小反映了森林景观类型两两之间在同一环境条件下共生稳定的状态,但只反映整体稳定性效应.其稳定性从森林景观对环境适宜的两个方面来体现,即生态相似性与生态互补性.(3)当某一景观跨越一个渐变的环境梯度时,对耦合度模型的应用造成一定的复杂性.(4)由于不同的环境资源使同一森林景观体现不同的生存状态,以及对环境资源利用会呈现阶段性的变异,森林景观环境稳定的耦合状态的确切认定存在模糊性.
A study was made of the characteristics of a diverse interaction between forest landscape types on account of their differences in internal biological mechanism and external environmental mechanism in the same environment system. According to the interaction extent between the forest landscape type and the environmental appropriateness measure, the concept of environmentbased coupling degree was proposed from the ecosystem ＂niche＂ and the Environment-based Coupling Degree Model between Forest Landscape Types was established. The results show that： （1） a coupling mechanism is formed by complementing and interfering with the landscape and coupling may bring the evolution of a new structure and function; （2） coupling reflects the state of symbiotic stability in the same environmental conditions from the ecological similarity and ecological complementary of the landscape; （3） there is some complexity in the application of the model because of the environmental gradient of the landscape; and （4） due to the different states of survival and the variation of forest landscape stages, quantitative ambiguity exists in determining the coupling degree.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2008年第4期67-71,共5页
Journal of Central South University of Forestry & Technology
基金
湖南省教育厅青年项目(05B059)
湖南省教育厅重点项目(05A067)
关键词
林学
森林景观类型
环境耦合度
模型
forestry forest landscape types
environment-based coupling degree
model
