TREE SPECIES DYNAMICS AND DISTURBANCE IN 3 SWEDISH BOREAL FOREST STANDS DURING THE LAST 2000 YEARS

被引：34

作者：

BRADSHAW, RHW

机构：

[1] Department of Forest Ecology, Swedish University of Agricultural Sciences, Umeå

来源：

JOURNAL OF VEGETATION SCIENCE | 1993年 / 4卷 / 06期

关键词：

AGE STRUCTURE; BETULA; CLIMATIC CHANGE; FIRE HISTORY; PICEA; PINUS; POLLEN ANALYSIS; POPULATION DYNAMICS; SUCCESSION;

D O I：

10.2307/3235612

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Data from three forest stands for the past 2000 yr show how the shade-intolerant species Pinus sylvestris and Betula pubescens maintain significant populations in the Swedish boreal landscape. Age structure data from a northern stand close to the range limits of Picea abies and Pinus complement a local pollen diagram, and reveal cyclic population fluctuations which can be related to periods of climatic stress and fire. Pollen data from two southern stands show that high fire frequencies in the past prevented the expansion of Picea populations. Reduction of the fire frequency during the last 200 yr has favoured Picea. A long time perspective reveals the population dynamics of long-lived species and indicates the controlling factors. Such knowledge permits assessment of the current status and likely future of forest stands.

引用

页码：759 / 764

页数：6

共 24 条

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