STRUCTURE AND REGENERATION PATTERNS IN A VIRGIN PICEA-ABIES FOREST IN NORTHERN SWEDEN

被引：164
作者：
HOFGAARD, A
机构：
[1] Department of Forest Ecology, Swedish University of Agricultural Sciences, Umeå
来源：
JOURNAL OF VEGETATION SCIENCE | 1993年 / 4卷 / 05期
关键词：
AGE STRUCTURE; BOREAL FOREST; GROWTH SUBSTRATE; LONG-TERM STABILITY; NORWAY SPRUCE; NURSE LOG; TOP-BREAKAGE;
D O I：
10.2307/3236125
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
A high-altitude boreal Picea abies forest, with tree ages of up to 410 yr, was studied with respect to age structure, spatial regeneration patterns, and substrate. The results suggest that recruitment is primarily dependent on germination substrate but also negatively correlated with the density of the tree layer. 60 % of all spruces < 1.3 m high grew on substrates connected with tree-fall; ca. 40 % were found on decomposing logs and stumps, covering only ca. 6 % of the forest floor. Individual logs remain important as a regeneration substrate for ca. 150 yr. Continuous presence of decomposing coarse wood is a condition for the maintenance of the population structure under the prevailing climatic conditions. Peaks in the age distribution (the 1870's and the 1940's - 1950's) are probably climatically induced. The results challenge the previous assumptions that this kind of forest undergoes cyclic development. Long-term structural stability with climatically induced minor variations may be an alternative model.
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页码：601 / 608
页数：8
相关论文
共 56 条
[1]  
Agren J., Zackrisson O., Age and size structure of Pinus sylvestri. populations on mires in central and northern Sweden, The Journal of Ecology, 78, pp. 1049-1062, (1990)
[2]  
Ahti T., Hamet-Ahti L., Jalas J., Vegetation zones and their sections in northwestern Europe, Ann. Bot. Fenn., 5, pp. 169-211, (1968)
[3]  
Alexandersson H., Eriksson B., Climate fluctuations in Sweden 1860–1987, SMHI Reports Meteorology and Climatology, 58, pp. 1-54, (1989)
[4]  
Aplet G.H., Laven R.D., Smith F.W., Patterns of community dynamics in Colorado Engelmann spruce Subalpine fir forests, Ecology, 69, pp. 312-319, (1988)
[5]  
Arnborg T., Lågaföryngringen i en syd‐lappländsk granurskog, Sv. Skogsvårdsför. Tidsk., 40, pp. 47-78, (1942)
[6]  
Bergeron Y., Dubuc M., Succession in the southern part of the Canadian boreal forest, Vegetatio, 79, pp. 51-63, (1989)
[7]  
Bonan G.B., Shugart H.H., Environmental factors and ecological processes in boreal forests, Annual Review of Ecology and Systematics, 20, pp. 1-28, (1989)
[8]  
Bonan G.B., Shugart H.H., Urban D.L., The sensitivity of some high‐latitude boreal forests to climatic parameters, Clim. Change, 16, pp. 9-29, (1990)
[9]  
Brubaker L., Responses of tree populations to climatic change, Vegetatio, 67, pp. 119-130, (1986)
[10]  
Emanuel W.R., Shugart H.H., Stevenson M.P., Climatic change and broad‐scale distribution of terrestrial ecosystem complexes, Clim. Change, 7, pp. 29-43, (1985)
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