Canopy gaps and establishment patterns of spruce (Picea abies (L.) Karst.) in two old-growth coniferous forests in central Sweden

Vegetatio ◽  
1991 ◽  
Vol 93 (2) ◽  
pp. 157-165 ◽  
Author(s):  
R. Leemans
Keyword(s):  
Picea Abies ◽  
Canopy Gaps ◽  
Coniferous Forests ◽  
Old Growth

scholarly journals Discrimination of canopy gaps and non-regenerating openings in old-growth temperate deciduous forests using airborne LiDAR data

2018 ◽  
Vol 48 (7) ◽  
pp. 774-782 ◽  
Author(s):  
Jean-François Senécal ◽  
Frédérik Doyon ◽  
Benoît St-Onge
Keyword(s):  
Deciduous Forest ◽  
Canopy Gaps ◽  
Airborne Lidar ◽  
Temperate Deciduous Forest ◽  
Tree Establishment ◽  
Old Growth ◽  
Predictive Variables ◽  
Temperate Deciduous ◽  
Temperate Deciduous Forests ◽  
Study Sites

The use of LiDAR in the study of gap regimes has seen significant progress in recent years. Researchers have assumed that canopy gaps detected in this manner are ecologically equivalent to gaps sampled in situ by more traditional methods. However, those latter methods usually include canopy gaps only and ignore non-regenerating openings that are produced by causes limiting tree establishment. We developed a predictive model capable of discriminating between canopy gaps and non-regenerating openings using LiDAR-derived data. Selected predictive variables were related to conditions that limit tree establishment such as zones of moisture accumulation and steep slopes or to the resulting vegetation physiognomy. The model was applied to three old-growth maple forests to predict the fractions of canopy openings belonging to these two types. On average, non-regenerating openings represented 19.5% of the total area detected as canopy openings and occupied 1.37% of the sites. Canopy gaps formed 80.5% of the total area in canopy openings and covered 5.71% of sites that were studied. The non-regenerating opening seemed more frequent on thin surficial deposits. The canopy gap fraction was similar among study sites but had lower values than usually reported for temperate deciduous forest.

The contribution of competition to tree mortality in old-growth coniferous forests

2011 ◽  
Vol 261 (7) ◽  
pp. 1203-1213 ◽  
Author(s):  
Adrian Das ◽  
John Battles ◽  
Nathan L. Stephenson ◽  
Phillip J. van Mantgem
Keyword(s):  
Tree Mortality ◽  
Coniferous Forests ◽  
Old Growth

Litter fall in some European coniferous forests as dependent on climate: a synthesis

2001 ◽  
Vol 31 (2) ◽  
pp. 292-301 ◽  
Author(s):  
B Berg ◽  
V Meentemeyer
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Scots Pine ◽  
Coniferous Forests ◽  
Stand Age ◽  
Litter Fall ◽  
Climatic Parameters ◽  
Significant Relationships ◽  
Needle Litter ◽  
Pinus Spp

Litter fall data was available for 64 sites in Europe, most of them in Fennoscandia. Included were 48 sites with pine (Pinus spp.), mainly Scots pine (Pinus sylvestris L.), and 16 sites with spruce (Picea spp.), mainly Norway spruce (Picea abies (L.) Karst.). Regressions were calculated for needle and total litter fall against a set of climatic parameters, and the best simple relationships were obtained with annual actual evapotranspiration (AET) and other parameters including temperature, whereas for example, precipitation gave lower r values. For needle litter fall and AET using all data, the R2adj value was 0.635 (n = 64), and for needle litter for pine and spruce separately, the R2adj were 0.576 (n = 48) and 0.775 (n = 16), respectively. AET plus stand age gave highly significant relationships for both coniferous genera combined (R2adj = 0.683), and for pine and spruce separately the corresponding values were 0.655 and 0.843, respectively. Using all available data we found highly significant relationships between needle litter fall and total litter fall. For Fennoscandia, litter fall for Scots pine and Norway spruce were compared. AET versus needle litter fall gave highly significant relationships for Scots pine (R2adj = 0.448, n = 34) and for Norway spruce (R2adj = 0.678, n = 13); the relationships were significantly different from each other.

Spatial pattern of downed logs and wood‐decaying fungi in an old‐growth Picea abies forest

2001 ◽  
Vol 12 (5) ◽  
pp. 609-620 ◽  
Author(s):  
Mattias Edman ◽  
Bengt Gunnar Jonsson
Keyword(s):  
Picea Abies ◽  
Spatial Pattern ◽  
Old Growth

scholarly journals Genetic heterogeneity in age classes of naturally regenerated old growth forest of Picea abies (L.) Karst

2014 ◽  
Vol 63 (1-6) ◽  
pp. 185-190 ◽  
Author(s):  
A. Wojnicka-Półtorak ◽  
W. Wachowiak ◽  
W. Prus-Głowacki ◽  
K. Celiński ◽  
A. Korczyk
Keyword(s):  
Picea Abies ◽  
Genetic Heterogeneity ◽  
Haplotype Diversity ◽  
Age Classes ◽  
Geographic Scale ◽  
Old Growth ◽  
Chloroplast Microsatellite ◽  
Lowland Forest ◽  
European Continent ◽  
Old Growth Forest

Abstract The Białowiez·a Primeval Forest is located northeastern Poland. It is one of Europe’s most precious old growth forests in terms of abundance and richness of vegetation, retaining features of a primeval lowland forest which cannot be found anywhere else on the European continent. The aim of the study was to assess the genetic heterogeneity of the naturally regenerated Picea abies population using five chloroplast microsatellite markers. In total, 290 trees representing five age classes were studied. Clear patterns of genetic differentiation in relation to demographic substructuring were found within the population. The class of embryos exhibited the greatest genetic richness as evident from the highest number of alleles and haplotypes, the highest mean number of private alleles and haplotypes and the highest haplotype diversity. In the subsequent age classes, a significant decrease in the level of genetic variation was observed. Our data demonstrate that long-lived, highly outcrossing tree species growing in continuous stands can be genetically heterogeneous on a small geographic scale. The heterogeneity is related to age structure and it is likely due to the underlying mating system and selection processes.

Sign in / Sign up

Export Citation Format

Share Document