滩地植被景观斑块分布特征与生态潜力评价  

Patch distribution character of beach vegetation and its ecological importance

作　　者：江波[1] 袁位高[1] 戚连忠[1] 朱锦茹[1] 沈爱华[1] 

机构地区：[1]浙江省林业科学研究院

出　　处：《生态科学》2005年第2期107-112,共6页Ecological Science

基　　金：浙江省"九五"科技重大项目(962103050).

摘　　要：斑块大小是研究景观要素特征的一个主要参数。物种动态、潜在生境、潜在林产品(木材)、能量、养分和水流以及很多其它参数都受到景观中斑块大小的影响。将研究区域——富阳市富阳镇段滩地划分为6大类81个基本类型,并将其归为低水平斑块(基本类型对应斑块)和高水平斑块(大类对应斑块),采用极大似然估计法进行了研究,Kotliar和Wiens提出的斑块结构的等级框架是对斑块意义的更完整的理解,研究过程中对斑块的确定符合Kotliar和Wiens的等级思想。充分考虑了两个水平上的斑块,及它们对应于斑块类型的两个水平,研究表明:低水平的斑块内部具有较高的同质性,而高水平的斑块内部具有较低的同质性;在两种斑块水平上都显示出斑块大小分布是明显右偏的;只有少数类型斑块大小的分布服从负指数分布,而绝大多数斑块大小的分布服从对数正态分布,这对斑块内的群落和生态系统的稳定性和保护提供了参考。Patch size is a main parameter of landscapecharacter study. It can affect species dynamics、potential habit、potential forest productor (timber)、energy、nutrient、stream and other parameters. In this study, the beach land in fuyang was divided into 6 groups and 81 types which were further classified as low level patch (corresponded based types) or high level patch (corresponded main types). Maximum likehood estimate method was applied in this study. The results showed that low level patch had the higher homogenous, while high level patch had lower homogenous nature. The distribution of the patch size in these two patch levels is obviously trended right. Only a few distributions of type patch size was complied with negative exponent distribution, while the major was complied with log normal distribution. The results provided an idea for the stability and protection of community and ecology system in patches.

关 键 词：滩地 植被景观 斑块分布 极大似然估计法 

分 类 号：S771.8[农业科学—森林工程] S718.55[农业科学—林学]