摘要
用林窗模型研究了小兴安岭南坡红松针阔混交林长期动态变化过程。通过有效性检验证明所得模型能够合理地预测森林的组成、结构和动态。以经营数据估计模型的参数后，运行模型模拟１２个树种６００ａ的演替动态，结果表明次生裸地的森林在几个世纪后能恢复到以红松为主的针叶树占优势的群落，演替呈现为树种组成差别很大的３个阶段：第１个阶段为０到７０ａ，这时阳性先锋树种在群落中占据优势，无论树种组成，生物量，生产力，阳性树种占的比例都最大；第２个阶段为７０～３００ａ，在这个阶段中，硬阔叶树占优势，呈现了树种多样性最大的一个阶段，阳性阔叶树种还未退去，耐阴针叶树种已开始增多；第３个阶段为３００ａ之后，针叶耐阴树种开始在群落中占据优势，并且整个群落的树种组成、生物量和生产力变化很小，林分的各种特性呈现具有一定波动的相对稳定态。
A forest dynamics model derived from“gap model” was developed to simulate the dynamics of stand composition and structure of Korean pine forest in southern Lesser,Xingan Mountain.The model was run with twelve species growing in the Korean pine forest.species parameters were estimated from silvicultural data at this region.Results simulated to the conifer broad Korean pine secondry forest show that succession coud be divided into tree periods.The first period was less than 70 years,intolerant species dominated in this period,in terms of composition or biomass or productivity.The second period was between 70～300 years,in this period intolerant species Betula and Populus decreased rapidly while broad leaved species increased.They reached their peaks at the stage of 140 years.Then,conifer species,Korand pine,Spruce and Abies increased and reached their peaks at the stage of some 240 years.The third period began after 300 years,in this stage tolerant species dominanted in the forest.The biomass,base area and production of those species steadily increased and approached to a relatively steady state.
出处
《生态学报》
CAS
CSCD
北大核心
1998年第1期38-47,共10页
Acta Ecologica Sinica
基金
国家自然科学基金
关键词
红松林
动态
模拟
小兴安岭
Korean pine forest,forest dynamics,modeling.
