PRELIMINARY OBSERVATIONS ON THE INFLUENCE OF SITE CONDITIONS ON NATURAL REGENERATION, WITH SPECIAL REFERENCE TO DUNECHT ESTATE, ABERDEENSHIRE

1945 ◽  
Vol 19 (1) ◽  
pp. 41-55
Author(s):  
W. M. McNEILL
Keyword(s):  
Special Reference ◽  
Natural Regeneration ◽  
Site Conditions

scholarly journals Natural regeneration of beech in mixed stands of beech and fir with spruce (Piceo-Abieti-Fagetum) in the virgin forest "Perucica"

2008 ◽  
pp. 107-126
Author(s):  
Zoran Govedar ◽  
Zoran Stanivukovic
Keyword(s):  
Spatial Distribution ◽  
Special Reference ◽  
Natural Regeneration ◽  
Stand Structure ◽  
Stand Development ◽  
Mixed Stands ◽  
Development Stages ◽  
Virgin Forest ◽  
Lateral Shoots ◽  
Young Growth

Natural regeneration of beech in mixed stands of beech and fir was researched in the virgin forest Perucica, e.g. the basic elements of stand structure with special reference to beech regeneration characteristics, and the regeneration process in the conditions of broken stand canopy. The analysis included the stand development stages in he virgin forest based on the elements of structure, as well as the silvigenetic phases on a transect 10?100 m. The characteristics of beech regeneration (abundance, height, crown size, length of apical and lateral shoots) were measured on the selected regeneration areas (initial regeneration gaps). The silvigenetic phases on the transect and the interdependence of beech regeneration characteristics were assessed based on regeneration characteristics, ways of occurrence and spatial distribution of the young growth.

scholarly journals Dying of ash (Fraxinus excelsior L.) in the ‘Jesionowe Góry’ Nature Reserve

2016 ◽  
Vol 77 (2) ◽  
pp. 124-133 ◽  
Author(s):  
Michał Orzechowski ◽  
Jakub Kacprzak ◽  
Wojciech Kędziora
Keyword(s):  
Natural Regeneration ◽  
Nature Reserve ◽  
Growing Season ◽  
Health Condition ◽  
Site Conditions ◽  
Age Classes ◽  
Ash Dieback ◽  
Pest Infestation ◽  
One Year ◽  
Optimal Site

Abstract The aim of this study was to analyse changes in the health status of ash stands belonging to the age classes VI and VIII growing in optimal site conditions and to compare the ash dieback with other age classes in the Jesionowe Góry Nature Reserve. Our research was conducted during the growing season in 2006 and 2007 on 22 permanent and 54 temporary sample plots. The health condition of the stands and the structure of natural regeneration were determined with a one-year interval. The amount of damage was defined using leaf loss, pest infestation and shoot dieback. Based on our estimation of natural regeneration, the capability for stand evolution in the future was determined.

Evoluzione strutturale di popolamenti cedui di robinia (Robinia pseudoacacia L.) nel Canavese (Torino - Italia) | Structural development of black locust coppices in Canavese (Turin, Italy)

2003 ◽  
Vol 154 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Mario Pividori ◽  
Cristina Grieco
Keyword(s):  
Natural Regeneration ◽  
Black Locust ◽  
Structural Parameters ◽  
Robinia Pseudoacacia ◽  
Rotation Period ◽  
Structural Development ◽  
Site Conditions ◽  
Time Period ◽  
Stand Parameters ◽  
Robinia Pseudoacacia L

With a synchronic analysis we studied the main stand parameters of 17 black locust coppices aged between 1–41 years. The homogeneous site conditions of the stands made it possible to study the structure of their dynamics in the context of a time period twice or three times longer than the traditional rotation period. Main dendrometrical and structural parameters of the studied stands are described. In undisturbed conditions, 5–7 years after the coppicing,natural regeneration of other broadleaved species starts to occur in the stands and eventually reaches the robinia crown belt, which begins to reduce its cover.

Overstory mortality and canopy disturbances in longleaf pine ecosystems

1996 ◽  
Vol 26 (11) ◽  
pp. 2035-2047 ◽  
Author(s):  
Brian J. Palik ◽  
Neil Pederson
Keyword(s):  
Natural Regeneration ◽  
Redundancy Analysis ◽  
Structural Characteristics ◽  
Longleaf Pine ◽  
Canopy Structure ◽  
Structural Complexity ◽  
Mortality Rates ◽  
Small Scale ◽  
Site Conditions ◽  
Second Growth

We studied longleaf pine (Pinuspalustris Mill.) ecosystems to determine causes and rates of overstory mortality, size of canopy disturbances, and the effects of disturbance on canopy structure. Further, we used redundancy analysis to relate variation in characteristics of mortality across a landscape to site and stand variables. We analyzed mortality that occurred from 1990 to 1994 in 70 second-growth plots that spanned a range of site conditions and stand structures, and in five large disturbances that occurred outside the random sample of plots. Half of pine mortality over 5 years in the 70 plots was from unknown causes. Lightning was the primary identifiable cause of mortality, followed by suppression and wind. Lightning mortality was most frequent on xeric sites, while windthrow was common on wet–mesic sites. Suppression mortality was frequent on wet–mesic sites and in higher density stands. Five-year mortality rates averaged 2.3 trees/ha, or 1.9% of original density. Most mortality consisted of single trees. Large disturbances (mostly from lightning) of 15–30 trees were rare, occurring once per 1000 ha in 5 years. Variation in amount of mortality and size of disturbance were unrelated to soil or stand structural characteristics. Low mortality rates from small-scale disturbances result in slow canopy turnover. These results indicate that large openings sufficient for natural regeneration of longleaf pine develop slowly in the absence of hurricanes. Silvicultural options for longleaf pine can be designed to mimic the canopy structure that results from natural canopy disturbances, which leave many live trees standing. Such options may be desirable if a goal of silviculture is to increase structural complexity in stands managed for timber.

scholarly journals Investigations on spatial heterogeneity of humus forms and natural regeneration of Larch (<i>Larix decidua Mill</i>.) and Swiss Stone Pine (<i>Pinus cembra L.</i>) in an alpine timberline ecotone (Upper Engadine, Central Alps, Switzerland)

2002 ◽  
Vol 57 (2) ◽  
pp. 81-90 ◽  
Author(s):  
B. Hiller ◽  
A. Müterthies ◽  
F.-L. Holtmeier ◽  
G. Broll
Keyword(s):  
Age Structure ◽  
Natural Regeneration ◽  
Larix Decidua ◽  
Tree Regeneration ◽  
Site Conditions ◽  
Central Alps ◽  
Pinus Cembra ◽  
Stone Pine ◽  
Swiss Stone Pine ◽  
Timberline Ecotone

Abstract. The north-west facing study area in the Upper Engadine (Central Alps, Switzerland) encompasses the whole timberline ecotone between 2200 m and 2400 m a.s.l.. By dendroecological methods, clear differences concerning quantity and age structure of the natural regeneration of the main tree species Swiss stone pine (Pinus cembra L.) and larch (Larix decidua Mill.) at different sites could be detected.The differing site conditions, closely linked to the microtopography, determine distribution and age structure of natural tree regeneration, as well as humus forms. On exposed sites characterised by Tenuic Humimors, an intensive natural regeneration of, in particular, Swiss stone pine occurs. In depressions with a Rhizic Leptomoder, the density of tree regeneration is low and a high tree mortality could be observed. The results indicate that the site conditions most important for the natural regeneration of trees in the timberline ecotone are reflected in the site-specific humus form.

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