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Journal articles on the topic 'Structure of stands'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Deal, Robert L. "The effects of partial cutting on forest plant communities of western hemlock Sitka spruce stands in southeast Alaska." Canadian Journal of Forest Research 31, no. 12 (2001): 2067–79. http://dx.doi.org/10.1139/x01-143.

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The effects of partial cutting on plant species richness, community structure, and several understory species that are important for deer forage were evaluated on 73 plots in 18 stands throughout southeast Alaska. These partially cut stands were harvested 1296 years ago when 1696% of the former stand basal area was removed. The species richness and community structure of understory plants were similar in uncut and partially cut plots. However, plots where more than 50% of the basal area was cut had a significantly different plant community structure. Species composition and abundance also ap

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2

Muir, Patricia S. "Disturbance effects on structure and tree species composition of Pinuscontorta forests in western Montana." Canadian Journal of Forest Research 23, no. 8 (1993): 1617–25. http://dx.doi.org/10.1139/x93-201.

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To what extent are stand structure and tree species composition affected by the nature of stand-initiating disturbances and other disturbances that cause significant tree mortality? I documented recent disturbance history and tree species composition, density, spatial pattern, and age structure in 48 stands dominated by Pinuscontorta Dougl. ex Loud. ssp. latifolia (Engelm.) Critchfield in western Montana. Stand modal ages ranged from 8 to 267 years, and sites were sampled across a range of elevations and aspects. Disturbance histories included stand-replacing fires (N = 25), partial burns (N =

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3

Dostálek, Jiří, Tomáš Frantík, and Miroslava Lukášová. "Genetic differences within natural and planted stands of Quercus petraea." Open Life Sciences 6, no. 4 (2011): 597–605. http://dx.doi.org/10.2478/s11535-011-0034-8.

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AbstractFive sessile oak [Quercus petraea (Matt.) Liebl.] stands from the Czech Republic were studied to learn about the impact of different types of forest management regimes on the genetic differences among tree populations and on population structures. One population had not been markedly affected by human activity, two populations represented unplanted stands that were extensively managed for a long period of time using the coppice system, and two populations were planted stands. Approximately 100 trees from each stand were mapped and subsequently genotyped using 10 nuclear microsatellite

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4

Boucher, D., L. De Grandpré, and S. Gauthier. "Développement dun outil de classification de la structure des peuplements et comparaison de deux territoires de la pessière à mousses du Québec." Forestry Chronicle 79, no. 2 (2003): 318–28. http://dx.doi.org/10.5558/tfc79318-2.

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Forest stand structure is an important element for biodiversity and, from a sustainable forest management perspective, uneven-sized stands should be managed in order to maintain the structural diversity over the landscape. The first objective of this study is to develop a statistical tool to characterize stand structure that can be used in forest management planning. The second objective is to classify the stand structure of two regions to illustrate a possible use for the tool. The statistical tool for characterizing stand structure has been developed from forest inventory data gathered by th

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5

Špulák, Ondřej, Jiří Souček, and Jakub Černý. "Do stand structure and admixture of tree species affect Scots pine aboveground biomass production and stability on its natural site?" Journal of Forest Science 64, No. 11 (2018): 486–95. http://dx.doi.org/10.17221/117/2018-jfs.

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The paper analyses stand structure and production on two experimental forest stand series of mature pure and mixed Scots pine stands, growing on natural Scots pine sites in the Czech Republic. Sessile oak was the main admixed species. In mixed stands, Scots pine constituted the dominant level of the stand, admixed species grew mostly as subdominants. Admixture increased stand densities and aboveground biomass production compared to pure stands. Sessile oak with the 20–30% number share within the Scots pine stand led to an increase of the Scots pine tree dimensions and mean stem merchantable wo

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6

Jaworski, A., Zb Kołodziej, and K. Porada. "Structure and dynamics of stands of primeval character in selected areas of the Bieszczady National Park." Journal of Forest Science 48, No. 5 (2019): 185–201. http://dx.doi.org/10.17221/11874-jfs.

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The investigations carried out in 1988 and 1998 on three permanent sample plots in stands of the East Carpathian beech forest (Dentario glandulosae-Fagetum) showed that in the growing up stage, the storeyed structure phase (Jawornik I stand), the stand volume increased from 547 m<sup>3</sup>/ha to 578 m<sup>3</sup>/ha while in the optimum stage, the ageing and regeneration phases (Jawornik II), it decreased from 631 m<sup>3</sup>/ha to 600 m<sup>3</sup>/ha, and in the growing up stage, the storeyed structure phase (Tworylczyk), from 611 m<sup&

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7

Berrill, John-Pascal, and Kevin L. O'Hara. "Simulating Multiaged Coast Redwood Stand Development: Interactions between Regeneration, Structure, and Productivity." Western Journal of Applied Forestry 24, no. 1 (2009): 24–32. http://dx.doi.org/10.1093/wjaf/24.1.24.

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Abstract Multiaged management regimes and harvesting scenarios were simulated in coast redwood (Sequoia sempervirens [D. Don.] Endl.) stands using models of stand growth and yield (CRYPTOS) and stocking assessment (redwood MASAM). Various stocking and age-class combinations were modeled on site index 100 and 130 ft (50 years). Results demonstrated how the number of cohorts, upper limit of stocking, and cohort densities affected growth and yield. Board foot volume increment reached a plateau in stands with a prescribed upper limit of stocking above leaf area index 7.2 to 8.6. Productivity did n

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8

Torquato, Luciane Paes, David Auty, Roger E. Hernández, Isabelle Duchesne, David Pothier, and Alexis Achim. "Black spruce trees from fire-origin stands have higher wood mechanical properties than those from older, irregular stands." Canadian Journal of Forest Research 44, no. 2 (2014): 118–27. http://dx.doi.org/10.1139/cjfr-2013-0164.

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In the eastern Canadian boreal forest, long fire return intervals lead to over 60% of stands having an irregular, uneven-aged structure, which is associated with slower growth. The aim of this study was to examine the effect of stand structure on the clear wood mechanical properties of black spruce (Picea mariana (Mill.) B.S.P.). A total of 128 trees were destructively sampled from stands of regular and irregular structure across Quebec, Canada. Nonlinear mixed-effects models were developed for each stand type to describe the variation in modulus of elasticity (MOE) and modulus of rupture (MOR

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9

Matisone, Ilze, Diāna Jansone, Ieva Jaunslaviete, Roberts Matisons, Agnese Anta Liepiņa, and Āris Jansons. "Stand Structure Beats Age for Ground Cover Vegetation in Ageing Hemiboreal Scots Pine and Norway Spruce Stands." Sustainability 15, no. 9 (2023): 7594. http://dx.doi.org/10.3390/su15097594.

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Intensifying forest management and a reduction in the rotation period necessitates the development of intensive biodiversity conservation strategies, such as the triad concept, which aims at ensuring habitat connectivity. Such an approach depends on the relationships between biodiversity components and manageable stand characteristics. Mostly, the biological value of stands has been associated with age, although stand structures, which are often intercorrelated with age, might be of primary importance. The relationships between ground cover vegetation, which is a principal component and indica

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10

Zahradník, D., S. Vacek, L. Bílek, I. Nosková, and Z. Vacek. "Horizontal structure of forest stands on permanent research plots in the Krkonoše Mts. and its development." Journal of Forest Science 56, No. 11 (2010): 531–40. http://dx.doi.org/10.17221/126/2010-jfs.

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Horizontal structure on 38 permanent research plots is described for juvenile growth and developmental phases (natural seeding, advance growth, plantations) and tree layer of a parent stand. Hopkins-Skellam index, Pielou-Mountford index, Clark-Evans index and Ripley's K-function were computed. The results are presented separately for beech stands, mixed stands, spruce stands, stands in the timberline ecotone and relict pinewood. The numbers and distribution of natural and combined regeneration recruits are mostly sufficient from the aspect of ecological, environmental and production functions

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11

Vacek, Stanislav, Rostislav Linda, Ivo Králíček, Karel Vančura, Anna Prokůpková, and Romana Prausová. "Effect of structure and dynamics of forests on the occurrence of Erythronium dens-canis." Journal of Forest Science 66, No. 9 (2020): 349–60. http://dx.doi.org/10.17221/96/2020-jfs.

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The paper presents the results of a study on the impact of forest stand structure and development in 1998 to 2018 on the occurrence of dog’s tooth violets (Erythronium dens-canis L.) in the Medník National Nature Monument, Czech Republic. The research was carried out in mixed European hornbeam and sessile oak stands, herb-rich European beech stands and the Sázava-river Norway spruce ecotype stands. The site and stand characteristics of the following three forest stand types were compared: 1) oak-hornbeam forests, 2) herb-rich beech forests and 3) secondary spruce forests. The results showed th

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12

Sullivan, Thomas P., and Walt Klenner. "Response of northwestern chipmunks (Tamias amoenus) to variable habitat structure in young lodgepole pine forest." Canadian Journal of Zoology 78, no. 2 (2000): 283–93. http://dx.doi.org/10.1139/z99-202.

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This study was designed to test the hypothesis that large-scale habitat alteration by stand thinning over a range of densities would increase the abundance and related population dynamics of northwestern chipmunks (Tamias amoenus) in young lodgepole pine (Pinus contorta) forest. Replicate study areas were located near Penticton, Kamloops, and Prince George in south-central British Columbia, Canada. Each study area had three stands thinned to densities of approximately 500 (low), 1000 (medium), and 2000 (high) stems/ha, with an unthinned young pine stand and an old-growth pine stand for compari

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13

Rudnicki, Mark, Victor J. Lieffers, and Uldis Silins. "Stand structure governs the crown collisions of lodgepole pine." Canadian Journal of Forest Research 33, no. 7 (2003): 1238–44. http://dx.doi.org/10.1139/x03-055.

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We investigated tree sway and crown collision behavior of even-aged lodgepole pine (Pinus contorta Dougl. ex Loud. var. latifolia Engelm.) stands of different structure in Alberta, Canada, to examine how these factors might affect loss of leaf area as stands mature. The Two Creeks stand (TC) had high density and slender trees, while the Chickadee stand (CH) had stout trees. The TC stand was then thinned (TCT) to reduce the stand density. For each stand, simultaneous tree sways of a group of 10 trees were monitored with biaxial clinometers during wind speed of 5 m/s (canopy top). Crown collisio

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14

Stewart, Bruce J., Peter D. Neily, Eugene J. Quigley, and Lawrence K. Benjamin. "Selected Nova Scotia old-growth forests: Age, ecology, structure, scoring." Forestry Chronicle 79, no. 3 (2003): 632–44. http://dx.doi.org/10.5558/tfc79632-3.

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A study of four old-growth stands in Nova Scotia was conducted to document the ecological characteristics of these currently rare Acadian forest ecosystems. Stands were selected to represent the two dominant climax forest types, hemlock–red spruce–eastern white pine, and sugar maple–yellow birch–beech. Data include measurements of age structure, species composition, diameter distribution, basal area, height, coarse woody debris, snags, vertical structure, and canopy condition. All stands were determined to be uneven-aged. Old-growth reference ages calculated for the stands ranged from 164 to 2

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15

Shibuya, Masato, and Satoshi Ishibashi. "Stand-level windthrow patterns and long-term dynamics of surviving trees in natural secondary stands after a stand-replacing windthrow event." Forestry: An International Journal of Forest Research 92, no. 4 (2019): 473–80. http://dx.doi.org/10.1093/forestry/cpz015.

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Abstract We examined typhoon windthrow patterns in stand-scale permanent plots within three natural forests and the long-term dynamics of surviving trees in two of these plots. The aim was to verify whether pre-disturbance composition and structure affected windthrow damage and stand recovery. The stands, which were in Hokkaido, the northernmost main island of Japan, differed in pre-disturbance composition (coniferous, mixed and broadleaved stands) and structure, and the basal area losses by the windthrow event were 81–93 per cent. Tree mortality was significantly related to tree size (diamete

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16

Permata, Fitriana Wulansari, Budi Kuncahyo, Haruni Krisnawati, and Relawan Kuswandi. "Stand Structure Dynamic of Logged Over Forest after Selective Timber Harvesting in Boven Digoel, Papua." Jurnal Sylva Lestari 11, no. 1 (2023): 177–91. http://dx.doi.org/10.23960/jsl.v11i1.610.

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Logged-over natural forest has a different stand structure and composition from primary natural forest due to logging activities. This study aimed to examine forest dynamics (upgrowth, ingrowth, and mortality) of the logged-over forest in PT. Tunas Timber Lestari (TTL) Papua in both stands with and without treatments. The data used in this study were based on the measurement in the Permanent Measurement Plots (PUP) for ten years. This study grouped data into five diameter classes of 10 cm intervals and three wood species groups (meranti timber, mixed timber, and non-commercial timber). Data an

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Vais, Andrey, Victor Nemich, Sevinch Mamedova, Pavel Mikhaylov та Artem Nepovinnykh. "Needles carbon pool structure in pine stands growing on abandoned farmland in subtaiga/forest-steppe zone of Сentral Siberia". E3S Web of Conferences 486 (2024): 04003. http://dx.doi.org/10.1051/e3sconf/202448604003.

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Studying green biomass carbon pool makes it possible to assess carbon sequestration potential of both forests stands and individual trees. Such a study is highly relevant considering the fact that pine stands are replacing abandoned farmlands in Central Siberia. The criterion used to differentiate pine forests was the stand density. Modelling the stands structure (in terms of number of trees and needles carbon pool) considering trees diameter, showed that the Gaussian function is the most adequate. The stands diameter structure differs from the needles carbon pool structure. Trees average for

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18

Данилов, Dmitriy Danilov, Смирнов, and A. Smirnov. "Effect of stand structure on density of pine and spruce wood in myrtillus forest type." Forestry Engineering Journal 4, no. 4 (2015): 13–20. http://dx.doi.org/10.12737/8434.

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Mixed stands of spruce and pine of myrtillus y forest types occupy large areas of the forest fund of the Leningrad region. For the theory and practice of forestry it is important to know the impact of plantations on the density of wood in bunk mixed spruce-pine stands. In mixed stands of pine and spruce disks and cores of wood species were selected from the model tree to determine the basic density by the method of maximum water capacity. The study of basic wood density of pine and spruce in the coniferous bunk stands revealed that its rates are higher for both sp

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19

Parker, Albert J., and Kathleen C. Parker. "Structural variability of mature lodgepole pine stands on gently sloping terrain in Taylor Park Basin, Colorado." Canadian Journal of Forest Research 24, no. 10 (1994): 2020–29. http://dx.doi.org/10.1139/x94-259.

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Diameter structures, diameter–age relationships, and spatial pattern of canopy and understory layers in seven stands representative of mature lodgepole pine (Pinusconforta Dougl. ex Loud. ssp. latifolia) forests on gentle (≤5°) slopes in the Taylor Park Basin of Colorado were documented. All stands originated following crown fires 120–140 years ago, during the period of initial Euro-American presence. Two distinct structures were evident among these stands. Four stands had closed canopies (cover >70%), relatively high basal areas and tree densities, low sapling and large seedling densities,

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Van Pelt, Robert, and Nalini M. Nadkarni. "Development of Canopy Structure in Pseudotsuga menziesii Forests in the Southern Washington Cascades." Forest Science 50, no. 3 (2004): 326–41. http://dx.doi.org/10.1093/forestscience/50.3.326.

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Abstract We quantified stand-level structural diversity in eight stands of temperate coniferous forests that ranged in age from 50 to 950 years in the southern Washington Cascade Range. Stands were chosen based on the dominance, or former dominance in the case of the oldest stands, of Pseudotsuga menziesii. In addition, to avoid confusing patterns of structural development, only stands that had a single disturbance of origin were used. Within each stand, randomly located transects were laid out that were proportional in size to the dominant tree height. Tree heights and diameters ranged up to

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Siipilehto, J. "Modelling stand structure in young Scots pine dominated stands." Forest Ecology and Management 257, no. 1 (2009): 223–32. http://dx.doi.org/10.1016/j.foreco.2008.09.001.

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Petrin, Rumen D. "Steepness and types of steepness of structure curves according to volume of aggregates of forest stands of different categories and tree species." Silva Balcanica 25, no. 3 (2024): 33–43. https://doi.org/10.3897/silvabalcanica.25.e129570.

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Based on data on the structures according to volumes of aggregates of forest stands of different categories &ndash; seed-tree coniferous and deciduous, rapidly growing, coppice, and forest plantations, the steepness of the structure curves has been studied while using the new index method for comparing parabolic curves (Petrin, 2021) , and the types of steepness have been determined by a new method &ndash; the method of coefficients, and, for comparison, by the method of natural indicators (Douhovnikov, 1966). Comparisons between the coefficients according to types of steepness and the

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Petrin, Rumen D. "Steepness and types of steepness of structure curves according to volume of aggregates of forest stands of different categories and tree species." Silva Balcanica 25, no. (3) (2024): 33–43. https://doi.org/10.3897/silvabalcanica.25.e129570.

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Based on data on the structures according to volumes of aggregates of forest stands of different categories – seed-tree coniferous and deciduous, rapidly growing, coppice, and forest plantations, the steepness of the structure curves has been studied while using the new index method for comparing parabolic curves (Petrin, 2021) , and the types of steepness have been determined by a new method – the method of coefficients, and, for comparison, by the method of natural indicators (Douhovnikov, 1966). Comparisons between the coefficients according to types of steepness and the zero na

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Ex, Seth A., R. Justin DeRose, and James N. Long. "Stand Development and Population Dynamics of Curlleaf Mountain Mahogany (Cercocarpus ledifolius Nutt.) Woodlands in Utah's Bear River Mountains." Western Journal of Applied Forestry 26, no. 4 (2011): 183–88. http://dx.doi.org/10.1093/wjaf/26.4.183.

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Abstract Curlleaf mountain mahogany (Cercocarpus ledifolius Nutt.) is a little-studied woodland tree that occurs in pure stands throughout the Intermountain West. Stand development and population dynamics of this species are poorly understood, despite their relevance to management. We describe here the development of stand age structures and population dynamics of mahogany woodlands in northern Utah using tree ages and measurements representing five structurally diverse stands. Establishment periods in all stands lasted decades, and regeneration continued intermittently in the absence of stand

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Stajic, Branko. "Definition of optimal structure of white ash juvenile stands." Bulletin of the Faculty of Forestry, no. 89 (2004): 213–22. http://dx.doi.org/10.2298/gsf0489213s.

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Optimal structure of young white ash stands was studied in the region of Majdanpecka Domena. The stands are characterized by poor crown development and a high number of trees. The definition of the optimal stand structure was based on the analysis of causal relationships between crown structure and tree and stand increment. It was concluded that the optimal number of trees on the sample plots should be considerably lower compared to the actual number of trees. This would enable an economic utilization of growth space, forming of more efficient crown assimilation, faster growth and more effecti

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Matsala, Maksym, Andrii Bilous, Roman Feshchenko, Raisa Matiashuk, Svitlana Bilous, and Yaroslav Kovbasa. "Spatial and compositional structure of European oak urban forests in Kyiv city, Ukraine." Journal of Forest Science 67, No. 3 (2021): 143–53. http://dx.doi.org/10.17221/173/2020-jfs.

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Forest dimensional structure and tree species composition strictly define ecosystem resilience, success of its functioning and development. Spatial structure of forest compartments provides an additional information on the forest stand heterogeneity. The aim of this study is to examine structural patterns (both spatial and nonspatial ones) in European oak (Quercus robur L.) urban forests located in Kyiv city, Ukraine. We compared two middle-aged (~ 80 years) and two mature (~ 180 years) oak stands in terms of structural metrics collecting a data from geo-referenced trees on the established per

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Kollenberg, Cassandra L., and Kevin L. O'Hara. "Leaf area and tree increment dynamics of even-aged and multiaged lodgepole pine stands in Montana." Canadian Journal of Forest Research 29, no. 6 (1999): 687–95. http://dx.doi.org/10.1139/x99-039.

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Age structure and distribution of leaf area index (LAI) of even and multiaged lodgepole pine (Pinus contorta var. latifolia Engelm.) stands were examined on three study areas in western and central Montana. Projected leaf area was determined based on a relationship with sapwood cross-sectional area at breast height. Stand structure and LAI varied considerably between individual plots. LAI and stand stem volume increment were significantly higher in multiaged than even-aged stands with the exception of one study area, which had higher volume increment in even-aged stands. Older cohorts and high

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Janowiak, Maria, Linda M. Nagel, and Christopher Webster. "Minimum Tree Size and Interpretation of Stand Structure in Uneven-Aged Northern Hardwoods." Northern Journal of Applied Forestry 27, no. 1 (2010): 34–37. http://dx.doi.org/10.1093/njaf/27.1.34.

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Abstract Uneven-aged management of northern hardwoods frequently relies on diameter distributions in evaluating and controlling stand structure. However, the minimum tree diameter used to analyze diameter distributions varies among studies and may affect the interpretation of distribution shapes and, subsequently, stand structure. It has been suggested that the use of larger minimum diameters in the construction of these distributions would cause rotated sigmoid stand structures to exhibit a negative exponential distribution shape. To test this hypothesis, we constructed diameter distributions

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Vacek, S., I. Nosková, L. Bílek, Z. Vacek, and O. Schwarz. "Regeneration of forest stands on permanent research plots in the Krkonoše Mts." Journal of Forest Science 56, No. 11 (2010): 541–54. http://dx.doi.org/10.17221/65/2010-jfs.

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The article describes natural, combined and artificial regeneration on 38 permanent research plots in both Czech and Polish part of the Krkono&scaron;e Mts. The attention is paid to species composition, spatial (horizontal and vertical) and age structure of forest regeneration according to different stand and site conditions. Concerning the structure and dynamics of forest stands and their regeneration, the potential and prospects of regeneration according to particular developmental stages and stand types (beech stands; mixed stands: spruce-beech, fir-beech, spruce-fir-beech; spruce stand

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Stimm, Kilian, Michael Heym, Ralf-Volker Nagel, Enno Uhl, and Hans Pretzsch. "Long-Term Productivity of Monospecific and Mixed Oak (Quercus petraea [Matt.] Liebl. and Quercus robur L.) Stands in Germany: Growth Dynamics and the Effect of Stand Structure." Forests 13, no. 5 (2022): 724. http://dx.doi.org/10.3390/f13050724.

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Wood production is one of the most important ecosystem service that forests provide to society. However, under changing climatic conditions, this appears to be subject to increasing uncertainties. In the present study we analyzed how long-term productivity of oak (Quercus petraea [Matt.] Liebl. and Quercus robur L.) stands has developed, how oak behaved on tree and stand level depending on the stand structure and which trade-offs can be observed. For the analyses, data from 147 long-term monospecific and mixed stands were investigated, which have been regularly recorded since 1898. Firstly, lo

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Remeš, J., and J. Kozel. "Structure, growth and increment of the stands in the course of stand transformation in the Klokočná Forest Range." Journal of Forest Science 52, No. 12 (2012): 537–46. http://dx.doi.org/10.17221/4534-jfs.

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This paper deals with transformation of pure even-aged forest stands to uneven-aged irregular stands on an example of the Klokočná Forest Range. The fully operational management system according to principles of shelterwood or selection systems has been executed here since 1993. An investigation of this transformation process started in 1999 and it is focused on the places with more distinct structural differences. On the basis of research analysis, it is possible to consider about the permanent uneven-aged forest stands in future here. But for successful achievement of this goal it is necessa

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Matisone, Ilze, Juris Katrevičs, Diāna Jansone, et al. "Ground Cover Vegetation in Differently Managed Hemiboreal Norway Spruce Stands: Plantation vs. Natural Regeneration." Diversity 16, no. 4 (2024): 203. http://dx.doi.org/10.3390/d16040203.

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Forest plantations, which have a simplified structure and composition, are becoming more frequent, raising concerns regarding their contribution to biological diversity in highly managed landscapes. The biological value of a stand has been related to stand age, although stand properties, which are often intercorrelated with it, yet are manageable, might be of primary importance. The relationships between stand properties (age, structure and composition) and ground cover vegetation, as a proxy for biological value, were assessed in Norway spruce stands with contrasting land use history (low-den

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Zeller, Laura, Astor Toraño Caicoya, and Hans Pretzsch. "Analyzing the effect of silvicultural management on the trade-off between stand structural heterogeneity and productivity over time." European Journal of Forest Research 140, no. 3 (2021): 615–34. http://dx.doi.org/10.1007/s10342-020-01350-z.

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AbstractThis study combined an empirically based simulation with an analysis of the trade-off between structural heterogeneity and stand productivity depending on time, spatial scale, and silvicultural management, whereas volume growth and tree species diversity have been examined in detail, the role of forest structure and its interdependencies with stand productivity has only lately become a stronger research focus. We used the growth simulator SILVA to examine the development of stand structural heterogeneity and its trade-off with stand productivity in age-class versus uneven-aged pure and

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Moussaoui, Louiza, Alain Leduc, Miguel Montoro Girona, et al. "Success Factors for Experimental Partial Harvesting in Unmanaged Boreal Forest: 10-Year Stand Yield Results." Forests 11, no. 11 (2020): 1199. http://dx.doi.org/10.3390/f11111199.

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Over the past two decades, partial harvesting has been increasingly used in boreal forests as an alternative to clearcutting to promote irregular stand structures and maintain a balance between biodiversity preservation and continued timber production. However, relatively little is still known about the silvicultural potential of partial harvesting in Canada’s boreal forest, especially in areas prone to organic matter accumulation (paludification), and most prior research has focused on biodiversity responses. In this study, we assess the effects of partial harvesting on stand development (rec

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Jaworski, A., and Z. Kołodziej. "Beech (Fagus sylvatica L.) forests of a selection structure in the Bieszczady Mountains (southeastern Poland)." Journal of Forest Science 50, No. 7 (2012): 301–12. http://dx.doi.org/10.17221/4627-jfs.

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The characteristics of two beech (Fagus sylvatica L.) stands are presented in this paper. One, the Tarnicki stand, situated in the Bieszczadzki National Park, represents the growing up stage and selection phase of a forest of primeval character. The other one, the Otryt stand, is situated in managed forests of the Lutowiska Forest District. In each stand two sample plots were established. The distribution of the number of trees in each sample plot agreed with de Liocourt sequence and Meyer curve. Both stands were characterized by the structure of many generations. The Otryt stand, with respect

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Janowiak, Maria K., Linda M. Nagel, and Christopher R. Webster. "Spatial Scale and Stand Structure in Northern Hardwood Forests: Implications for Quantifying Diameter Distributions." Forest Science 54, no. 5 (2008): 497–506. http://dx.doi.org/10.1093/forestscience/54.5.497.

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Abstract Diameter distributions are frequently used to describe northern hardwood stand structure and serve as a structural guide for management. Several diameter distribution shapes have been found in managed and unmanaged uneven-aged northern hardwood stands, and it is unclear which patterns are due primarily to natural processes that could be self-perpetuating versus patterns that may be transient or aberrant. Variability in research methods has clouded consistent interpretation of resulting distributions. In this study, we evaluated northern hardwood stands in Michigan to determine how man

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Petráš, R., J. Mecko, and V. Nociar. "Diameter structure of the stands of poplar clones." Journal of Forest Science 56, No. 4 (2010): 165–70. http://dx.doi.org/10.17221/65/2009-jfs.

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The construction of a continuous mathematical model of frequency distributions of the diameters of trees of poplar clones Robusta and I-214 in dependence on tree diameter and mean diameter of stand is presented. Empirical material consists of diameter measurements on research plots from poplar regions in Slovakia. There were 90 plots for I-214 clone and 142 plots for Robusta clone. There were about 10&ndash;250 trees with mean diameter 2&ndash;70 cm on the research plots. The model was derived according to the three-parameter Weibull function. Its parameters were estimated by maximum l

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Sheng, Qi, Lingbo Dong, Ying Chen, and Zhaogang Liu. "Selection of the Optimal Timber Harvest Based on Optimizing Stand Spatial Structure of Broadleaf Mixed Forests." Forests 14, no. 10 (2023): 2046. http://dx.doi.org/10.3390/f14102046.

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There is increasing interest in optimizing stand structure through forest management. The forest structure influences growth and maintains the structure, promoting sustainability. Structure-based forest management (SBFM), which is based on the spatial relationships between a reference tree and its four nearest neighbors, considers the best spatial structure for the stand and promotes the development towards a healthy and stable state by selectively thinning specific trees. This management method is a scientific approach for sustainable forest management, and appropriate harvesting is the core

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Lussier, Jean-Martin, Hubert Morin, and Réjean Gagnon. "Évolution de la structure diamétrale et production ligneuse des pessières noires issues de coupe et de feu." Canadian Journal of Forest Research 32, no. 3 (2002): 526–38. http://dx.doi.org/10.1139/x01-204.

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The widespread use of careful logging in the province of Quebec raises many questions about the effects of this practice on the structure and productivity of boreal black spruce (Picea mariana (Mill.) BSP) stands compared with fire-origin stands that are currently being harvested. The objective of this study is to describe and compare the evolution pattern of the diameter structure of stands originating from fire or logging dating back to the first half of the 20th century. The dendrochronological approach allowed the reconstitution of the dynamics of 40- to 96-year-old stands. Second-growth s

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Axelson, Jodi N., René I. Alfaro, and Brad C. Hawkes. "Changes in stand structure in uneven-aged lodgepole pine stands impacted by mountain pine beetle epidemics and fires in central British Columbia." Forestry Chronicle 86, no. 1 (2010): 87–99. http://dx.doi.org/10.5558/tfc86087-1.

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We examined the development of lodgepole pine (Pinus contorta Dougl.) in uneven-aged stands in the Interior Douglasfir (IDF) biogeoclimatic zone of central of British Columbia (B.C.), which are currently undergoing a massive outbreak of the mountain pine beetle (Dendroctonus ponderosae Hopkins; MPB). Using historical ecological approaches, dendrochronology, and stand measurement data, we determined the roles MPB and fire disturbances have played in the ecological processes of lodgepole pine in an Interior Douglas-fir zone. We found that multiple mixed-severity fires created patchy uneven-aged

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Li, Yuanyuan, Han Chen, Qianyun Song, et al. "Changes in Soil Arthropod Abundance and Community Structure across a Poplar Plantation Chronosequence in Reclaimed Coastal Saline Soil." Forests 9, no. 10 (2018): 644. http://dx.doi.org/10.3390/f9100644.

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Poplar plantations have the capacity to improve the properties of soils in muddy coastal areas; however, our understanding of the impacts of plantation development on soil arthropods remains limited. For this study, we determined the community dynamics of soil dwelling arthropods across poplar plantations of different ages (5-, 10-, and 21-years) over the course of one year in Eastern Coastal China. The total abundance of soil arthropods differed with stand development. Further, there were some interactions that involved the sampling date. On average, total abundance was highest in the 10-year

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Brassard, Brian W., Han Y. H. Chen, Jian R. Wang, and Peter N. Duinker. "Effects of time since stand-replacing fire and overstory composition on live-tree structural diversity in the boreal forest of central Canada." Canadian Journal of Forest Research 38, no. 1 (2008): 52–62. http://dx.doi.org/10.1139/x07-125.

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Stand structure diversity is hypothesized (i) to increase with stand development and (ii) to be greater in mixedwood stands than in conifer and broadleaf stands. We examined the effects of time since stand-replacing fire (TSF) and overstory type on stand volume, stand density, and tree-size variability, which is measured using Shannon’s diversity index (H′) and coefficient of variation, in fire-origin boreal forest stands. We sampled 36 stands representing conifer, mixedwood, and broadleaf overstory types, ranging in ages from 72 to 201 years TSF on upland mesic sites in northwestern Ontario,

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Bartha, Dénes, Péter Ódor, Tibor Horváth, et al. "Relationship of Tree Stand Heterogeneity and Forest Naturalness." Acta Silvatica et Lignaria Hungarica 2, no. 1 (2006): 7–22. http://dx.doi.org/10.37045/aslh-2006-0001.

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The aim of our study was to investigate if compositional (tree species richness) and structural (vertical structure, age-structure, patterns of canopy closure) heterogeneity of the canopy layer is related to individual naturalness criteria and to overall forest naturalness at the stand scale. The naturalness values of the assessed criteria (tree species composition, tree stand structure, species composition and structure of shrub layer and forest floor vegetation, dead wood, effects of game, site characteristics) showed similar behaviour when groups of stands with different heterogeneity were

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Meshkova, Valentyna, Tetiana Pyvovar, and Olena Kuznetsova. "The age structure of Ulmus L. stands in the eastern regions of Ukraine." Наукові праці Лісівничої академії наук України, no. 25 (November 23, 2023): 29–38. http://dx.doi.org/10.15421/412302.

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The aim of the research was to determine the features of the age structure for natural and artificial elm stands depending on species, origin, and region. The proportion of the stand area of natural and artificial stands of each elm species by 10-year age classes was evaluated for the forest fund of the Donetsk, Kharkiv, and Sumy Regional Forest and Hunting Management Administrations (RFHMA). Four main forest-forming elm species are represented in the forest fund of the Donetsk and Kharkiv RFHMA (U. minor, U. laevis, U. glabra, and U. pumila). In the Sumy RFHMA, there are three forest-forming

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Borecki, Tomasz, Łukasz Łopiński, Wojciech Kędziora, Michał Orzechowski, Roman Wójcik, and Edward Stępień. "The Concept of Regulating Forest Management in a Region Subject to High Environmental Pressure." Forests 9, no. 9 (2018): 539. http://dx.doi.org/10.3390/f9090539.

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In modern forestry, the complexity of the planning process is increasing, specifically in the context of the sustainable use of forest resources and its adaptation to climate changes. This article presents the concept of forest use regulation promoting the sustainable forestry development in forest management planning. A method for defining a synthetic criterion of assessing important features of stand structure was proposed, which would enable the classification of stands in terms of needs and the urgency of their transformation (reconstruction) or suitability for longer standing. As a result

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Dempster, W. Richard, and Sharon Meredith. "Growth and yield of lodgepole pine stands disturbed by mountain pine beetle in the Lower Foothills of Alberta." Forestry Chronicle 97, no. 01 (2021): 65–77. http://dx.doi.org/10.5558/tfc2021-008.

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Changes in the structure and dynamics of lodgepole pine stands following the 2006 outbreak of mountain pine beetle in western Alberta were investigated by monitoring attacked permanent sample plots over the following decade and projecting future stand development with locally validated growth models. Results suggest that a wide range in growth and yield of attacked stands is likely, with projected impacts varying from minor and inconsequential modifications to full stand replacement. Severely disturbed stands are unlikely to naturally regenerate to pine. The degree to which timber production i

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Küßner, Ralf, and Reinhard Mosandl. "Comparison of direct and indirect estimation of leaf area index in mature Norway spruce stands of eastern Germany." Canadian Journal of Forest Research 30, no. 3 (2000): 440–47. http://dx.doi.org/10.1139/x99-227.

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IIn three mature Norway spruce (Picea abies (L.) Karst.) stands of the Erzgebirge (Ore Mountains) in eastern Germany, the performance of the LAI-2000 plant canopy analyzer (LI-COR instruments) was tested for indirect estimation of leaf area index (LAI). The LAI-2000 calculates effective leaf area index (LAIe, m2/m2) resulting from radiation measurements and subsequent model calculations. LAIe underestimated directly estimated half the total leaf area index (LAI0.5t, m2/m2) by 37-82% as determined from allometric relationships derived from subsample harvesting. The degree of underestimation was

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Przybylski, Jan, Andrzej Majcher, and Mirosław Neska. "A Reconfigurable Control System for a PA-PVD Technology Test Stand." Solid State Phenomena 220-221 (January 2015): 504–9. http://dx.doi.org/10.4028/www.scientific.net/ssp.220-221.504.

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The construction of technological test stands is connected with the problem of a proper determination of the structure of the stands enabling the execution of technological processes with different types of instruments and devices. The article presents the test stand for Plasma–Assisted Physical Vapour Deposition (PA-PVD) technological processes. The configurability of the stand was achieved thanks to the modular structure of the stand and the use of appropriate software and hardware solutions. The authors describe the developed solution facilitating the execution of plasma processes applied f

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Ahtikoski, Anssi, Jouni Siipilehto, Hannu Salminen, Mika Lehtonen, and Jari Hynynen. "Effect of Stand Structure and Number of Sample Trees on Optimal Management for Scots Pine: a Model-Based Study." Forests 9, no. 12 (2018): 750. http://dx.doi.org/10.3390/f9120750.

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This study presents an attempt to discover the effect of sample size on the financial outcome derived by stand-level optimization with individual tree modeling. The initial stand structure was altered to reflect sparse, average, and dense Scots pine (Pinus sylvestris L.) stands. The stands had varying numbers of stems but identical weighted median diameters and stand basal areas. The hypothetical Weibull diameter distributions were solved according to the parameter recovery method. The trees were systematically sampled with respect to the tree basal area corresponding to sample sizes of 10, 20

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Zawadzka, Anna, and Alicja Słupska. "Under-Canopy Regeneration of Scots Pine (Pinus sylvestris L.) as Adaptive Potential in Building a Diverse Stand Structure." Sustainability 14, no. 2 (2022): 1044. http://dx.doi.org/10.3390/su14021044.

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Under-canopy natural regeneration of Scots pine (Pinus sylvestris L.) stand is able to create stands with a complex structure, which are characterised by greater resistance to extreme phenomena related to climate change. The main aim of the work was to analyse the potential of pine undergrowth, its role in the stand, and its usefulness in further breeding plans to create stands of various structure, with greater stability and tolerance to stress factors, including greater resistance to climate change. The study was carried out in north-eastern Poland, in pine stands thinned by strong (hurrican

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