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Articles de revues sur le sujet « Fores regeneration. eng »

Auteur : Grafiati
Publié le 4 juin 2021
Mis à jour le 4 février 2022

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1

Bednařík, J., V. Čada, and K. Matějka. "Forest succession after a major anthropogenic disturbance: a case study of the Jewish Forest in the Bohemian Forest, Czech Republic." Journal of Forest Science 60, No. 8 (2014): 336–48. http://dx.doi.org/10.17221/57/2014-jfs.

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The knowledge of forest development after disturbances, particularly anthropogenic disturbances, is of major importance for forest management. Many areas of mountain forests in Europe have been affected by human activities such as felling and livestock grazing in the past and then left for natural succession. Those forests provide several ecosystem services (e.g. soil or avalanche protection) and therefore it is vital to know their developmental processes. The Norway spruce forest stand in the area of Medvědí Mt. (Šumava National Park, Czech Republic), known as the Jewish
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GITHIRU, MWANGI, LEON BENNUN, and LUC LENS. "Regeneration patterns among bird-dispersed plants in a fragmented Afrotropical forest, south-east Kenya." Journal of Tropical Ecology 18, no. 1 (2002): 143–49. http://dx.doi.org/10.1017/s0266467402002092.

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Fruit-eating birds play an important role in the seed dispersal of many tropical plants (e.g. Herrera 1984), and the foraging behaviour of avian frugivores may affect their seed-dispersal capabilities (Loiselle & Blake 1999,Schupp 1993, Traveset 1994). For instance,shorter visits tend to produce less clumped seed distributions (Graham et al. 1995). Also,avian frugivores often feed on the fruits of several plant species over short periods of time (Herrera 1984, 1988a; Levey et al. 1994) in some non-random pattern (Herrera 1998). This potentially produces a predictable spatial pattern of the
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3

Govedar, Zoran, and Zoran Stanivukovic. "Natural regeneration of beech in mixed stands of beech and fir with spruce (Piceo-Abieti-Fagetum) in the virgin forest "Perucica"." Bulletin of the Faculty of Forestry, no. 97 (2008): 107–26. http://dx.doi.org/10.2298/gsf0897107g.

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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 regenera
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Ward, Jeffrey S., Scott C. Williams, and Megan A. Linske. "Influence of invasive shrubs and deer browsing on regeneration in temperate deciduous forests." Canadian Journal of Forest Research 48, no. 1 (2018): 58–67. http://dx.doi.org/10.1139/cjfr-2017-0208.

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While both chronic white-tailed deer (Odocoileus virginianus Zimmermann) overbrowsing and invasive shrubs have been linked to native regeneration failure in temperate hardwood forests, little is known of their relative importance and possible synergistic effects. Therefore, we established three study areas in Connecticut to examine the interaction of three levels of invasive shrub control and absence or presence of deer herbivory on forest regeneration over 9 years. Five observations suggest that obtaining forest regeneration requires a comprehensive management strategy. First, competitive int
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Frei, Maurus. "Zu wenig Waldverjüngung? Mit mehr Waldbewirtschaftung und Jagd zum Erfolg (Essay)." Schweizerische Zeitschrift fur Forstwesen 168, no. 4 (2017): 200–204. http://dx.doi.org/10.3188/szf.2017.0200.

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Not enough forest regeneration? Intensified silviculture and hunting bring success (essay) The influence of red deer, roe deer and chamois on forest regeneration is significant in Swiss forests, especially in mountain forests. Oak, silver fir and sycamore rarely regenerate without protection measures. Red deer populations have practically doubled over the last 20 years, and roe deer are found in every forest. Nevertheless, it is possible to have, even in Switzerland, a dense, site-appropriate forest regeneration. The conditions for this are close-to-nature silviculture over large areas, and hu
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HOMER, FLOYD, KISHORE LAL, and WINSTON JOHNSON. "Forest species regeneration and management options in the Melajo Nature Reserve, Trinidad and Tobago." Environmental Conservation 25, no. 1 (1998): 53–64. http://dx.doi.org/10.1017/s0376892998000095.

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Tropical moist forests are declining rapidly world-wide. Reforestation efforts in Trinidad have generally been insufficient and focused on non-native species. Some of these species (e.g. Pinus caribaea), however, appear ecologically inappropriate but have been used extensively on sandy soils after fires or where harvesting has degraded the original vegetation. Little research attention has been given to natural regeneration as a potential for future timber production. The purpose of this study was to determine whether or not post-fire regeneration provided sufficient species of commercial impo
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Pitt, Douglas, Andrée Morneault, William Parker, Len Lanteigne, Michael Hoepting, and Al Stinson. "Influence of herbaceous and woody competition on white pine regeneration in a uniform shelterwood." Forestry Chronicle 87, no. 05 (2011): 653–68. http://dx.doi.org/10.5558/tfc2011-072.

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We investigated the effects of herbaceous and woody vegetation control on the survival and growth of planted and natural eastern white pine (Pinus strobus L.) seedlings through six growing seasons following a uniform shelterwood regeneration harvest on two independent sites. Subsequent to chain scarification, white pine seedlings were planted at 2-m spacing, augmenting natural regeneration (full stocking and >3000 seedlings per ha). Herbaceous vegetation control involved the suppression of grasses, forbs, ferns, and low shrubs, and was maintained for zero, two, or four growing seasons after
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Maza-Villalobos, Susana, Celina Lemus-Herrera, and Miguel Martínez-Ramos. "Successional trends in soil seed banks of abandoned pastures of a Neotropical dry region." Journal of Tropical Ecology 27, no. 1 (2010): 35–49. http://dx.doi.org/10.1017/s0266467410000611.

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Abstract:A chronosequence was used to study seed-bank communities during the first 12 y of tropical-dry-forest regeneration in abandoned pastures in Chamela, Mexico. Prediction that seeds of woody species replace those of herbaceous species during succession was tested and mechanisms of species replacement (facilitation, tolerance, inhibition) were assessed. Four successional categories (three sites each) were considered: pasture (0–1 y since abandonment), early (3–5 y), intermediate (10–12 y), and old-growth forest. At the end of the dry season, 20 cylindrical soil samples (10 cm diameter, 15
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Rađević, Vid, Predrag Pap, and Verica Vasić. "Management of the common oak forests in Ravni Srem: Yesterday, today, tomorrow." Topola, no. 206 (2020): 41–52. http://dx.doi.org/10.5937/topola2006041r.

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The paper shows a historical overview of the common oak forest management in Ravni Srem from the end of the 19th century to the present. Particular attention is paid on various ways of regeneration, tending and protection measures of these forests in the past and present and proposed the directions for the common oak forests regeneration in the future.
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Guedes, Isabel Carolina de Lima, Luiz Moreira Coelho Júnior, Antônio Donizette de Oliveira, José Márcio de Mello, José Luiz Pereira de Rezende, and Charles Plínio de Castro Silva. "Economic analysis of replacement regeneration and coppice regeneration in eucalyptus stands under risk conditions." CERNE 17, no. 3 (2011): 393–401. http://dx.doi.org/10.1590/s0104-77602011000300014.

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Projects are by their very nature subject to conditions of uncertainty that obstruct the decision-making process. Uncertainties involving forestry projects are even greater, as they are combined with time of return on capital invested, being medium to long term. For successful forest planning, it is necessary to quantify uncertainties by converting them into risks. The decision on whether to adopt replacement regeneration or coppice regeneration in a forest stand is influenced by several factors, which include land availability for new forest crops, changes in project end use, oscillations in
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Nzau, Bernard, and Claudia Trillo. "Affordable Housing Provision in Informal Settlements through Land Value Capture and Inclusionary Housing." Sustainability 12, no. 15 (2020): 5975. http://dx.doi.org/10.3390/su12155975.

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Public-driven attempts to provide decent housing to slum residents in developing countries have either failed or achieved minimal output when compared to the growing slum population. This has been attributed mainly to shortage of public funds. However, some urban areas in these countries exhibit vibrant real estate markets that may hold the potential to bear the costs of regenerating slums. This paper sheds light on an innovative hypothesis to achieve slum regeneration by harnessing the real estate market. The study seeks to answer the question “How can urban public policy facilitate slum rege
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Wright, Pamela J., and Douglas Rideout. "Recent Experiences with End Result Contracting on National Forestlands in the West." Western Journal of Applied Forestry 5, no. 4 (1990): 119–23. http://dx.doi.org/10.1093/wjaf/5.4.119.

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Abstract The cost effectiveness of USDA Forest Service end result contracts (ERCs), also known as "stewardship" contracts, was compared with similar information from conventional service contracts. Bid data from 18 ERCs were examined, and Forest Service costs were compared with service contracts and timber sale contracts on the Umpqua and Winema National Forests in Oregon. We found generally that ERCs are still in an initial stage of development, but at this point costs of ERCs compared well with service contracts. The results of this study indicate that where regeneration is typically success
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Falfán-Cortés, Armando, Alejandro Velázquez-Martínez, Valentín J. Reyes-Hernández, Aurelio M. Fierros-González, Gustavo Ramírez-Valverde, and J. Jesús Vargas-Hernández. "Growth and water potential forPinus patula Schltdl. & Cham. seedlings in the ejido Carbonero Jacales, Huayacocotla, Veracruz." Revista Chapingo Serie Ciencias Forestales y del Ambiente 27, no. 2 (2020): 309–22. http://dx.doi.org/10.5154/r.rchscfa.2020.09.061.

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Introduction: Regeneration of forest stands under management is one of the most relevant silvicultural practices for forest cultivation. Objective: To compare growth and water balance for both naturally regenerated and planted seedlings in Pinus patula Schltdl. &Cham. stands harvested with the seed tree method in the ejido Carbonero Jacales, Huayacocotla, Veracruz. Materials and methods: Four sites per stand with natural regeneration and planted seedlings were selected for paired comparison. Origin and age of seedlings were recorded at each site, water potential was measured throughout the
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14

Heinemann, Karin, Thomas Kitzberger, and Thomas T. Veblen. "Influences of gap microheterogeneity on the regeneration of Nothofagus pumilio in a xeric old-growth forest of northwestern Patagonia, Argentina." Canadian Journal of Forest Research 30, no. 1 (2000): 25–31. http://dx.doi.org/10.1139/x99-181.

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We experimentally examined the influences of within-gap environmental heterogeneity on regeneration patterns of Nothofagus pumilio (Poepp. & Endl.) Krasser near the xeric limit of its distribution in northern Patagonia, Argentina. Results from this xeric old-growth forest are compared with patterns previously described for the same species in mesic forests. Survival of N. pumilio seedlings beneath tree-fall gaps in this relatively xeric forest appears to be strongly influenced by moisture availability. Seedlings and saplings that have survived this demographic bottleneck are found at micro
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15

Li, Hongqi, and Yung C. Shin. "A Comprehensive Dynamic End Milling Simulation Model." Journal of Manufacturing Science and Engineering 128, no. 1 (2005): 86–95. http://dx.doi.org/10.1115/1.2035694.

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This paper presents a comprehensive time domain model that simulates end milling processes under general cutting conditions. Over an extensive range of axial depths of cut, the model can accurately predict regenerative forces and dynamic responses by considering varying dynamics along the cutting depth, three-dimensional forces, and cutting tool geometries. The prediction of stability limit is validated under cutting conditions of both large depths and very small radial immersions. In addition, three-dimensional surface profiles under both stable and chatter conditions are predicted and compar
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16

Zhang, Hongmao, Yu Wang, and Zhibin Zhang. "Domestic goat grazing disturbance enhances tree seed removal and caching by small rodents in a warm-temperate deciduous forest in China." Wildlife Research 36, no. 7 (2009): 610. http://dx.doi.org/10.1071/wr09001.

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Context. Grazing by large herbivores may have a considerable influence on ground vegetation as well as on the species composition and abundance of granivors (e.g. small rodents) and this may affect forest regeneration. Very few studies have focussed on the effects of herbivore disturbance on forest regeneration by looking at the modified seed-hoarding behaviour of small rodents. Aims. To test the indirect effects that grazing disturbance by domestic animals has on seed dispersal through the modified seed-hoarding behaviour of small rodents. Methods. We looked at the differences in seed removal
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Dibaba, Abyot, Teshome Soromessa, Alemayehu Kefalew, and Admassu Addi. "Woody Species Diversity, Vegetation Structure, and Regeneration Status of the Moist Afromontane Forest of Agama in Southwestern Ethiopia." International Journal of Ecology 2020 (June 30, 2020): 1–10. http://dx.doi.org/10.1155/2020/1629624.

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This study was conducted in Agama Forest in Kafa Zone, Southwestern Ethiopia, to assess species diversity, vegetation structure, and regeneration status of woody species. A systematic sampling technique was employed to collect vegetation data. Sixty (60) sample plots of 25 m × 25 m were laid at 300 m intervals all along ten grids interspaced 800 m apart. Sample plots of 25 m × 25 m were used to record DBH and H of all woody plant species reaching a DBH >2.5 cm and height >2 m. For the inventory of seedling and sapling, two subplots of 2 m × 5 m were used at the beginning and the end of t
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18

Ehnes, James, and Vince Keenan. "Implementing wildfire-based timber harvest guidelines in southeastern Manitoba." Forestry Chronicle 78, no. 5 (2002): 680–85. http://dx.doi.org/10.5558/tfc78680-5.

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The Manitoba Model Forest and Tembec Industries (Pine Falls Operations) are operationalizing the overall goal of sustainable forest management: maintain forest ecosystem health while harvesting timber. Timber harvest guidelines intended to approximate the effects of a large wildfire were developed for spatial scales that span from the operating area down to the site. Operating area issues are addressed through landscape design guidelines that locate cutblocks and other activities (e.g., roads) within an operating area. Cut-block guidelines determine how harvesting, site preparation and regener
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19

Fukasawa, Yu, Yoko Ando, Satoshi N. Suzuki, Mineaki Aizawa, and Daisuke Sakuma. "Climate influences the effect of fungal decay type on regeneration of Picea jezoensis var. hondoensis seedlings on decaying logs." Canadian Journal of Forest Research 50, no. 1 (2020): 73–79. http://dx.doi.org/10.1139/cjfr-2019-0147.

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Hondo spruce (Picea jezoensis var. hondoensis (Mayr) Rehder)) is separately distributed among several mountainous regions in central Japan as remnant populations of the last glacial period. To identify factors that affect Hondo spruce seedling regeneration on decaying logs, we investigated the relationships between climatic conditions, log properties, including decay type by fungi, and Hondo spruce seedling density on logs using data from seven subalpine Hondo spruce forests in central Japan. The results showed that the presence of soft rot was associated with higher seedling density, and the
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Kennard, Deborah. "Commercial tree regeneration 6 years after high-intensity burns in a seasonally dry forest in Bolivia." Canadian Journal of Forest Research 34, no. 11 (2004): 2199–207. http://dx.doi.org/10.1139/x04-100.

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The effects of three site-preparation treatments (high-intensity burn, low-intensity burn, and mechanical cleaning with machetes and chainsaws) on the regeneration of commercial tree species, composition and structure of competing vegetation, and soil chemical and structural properties were evaluated in a seasonally dry forest in southeast Bolivia. Six years after controlled burns, the high-intensity burn treatment had the both the highest density and the tallest individuals of shade-intolerant commercial tree species. Competing vegetation was also less dominant in the high-intensity burn trea
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El-Sheikh, Mohamed A. "Population structure of woody plants in the arid cloud forests of Dhofar, southern Oman." Acta Botanica Croatica 72, no. 1 (2013): 97–111. http://dx.doi.org/10.2478/v10184-012-0008-6.

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Abstract This study evaluates the size frequency distribution of 11 trees and shrubs in the cloud forest in Wadi Garziz, southern Oman, in order to assess their current situation, which is affected by cutting, overgrazing and other constraints. A size class distribution and a vegetation structure analysis were applied in order to analyze the dynamics of this forest using census data from 51 plots selected across 5 transects covering the hill-slope andwadi-bed habitats. Some of the trees inhabiting the hill-slopes (e.g. Acacia senegal and Commiphora spp.) were found to exhibit an inverse J-shap
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Salmukhanbetova, Zhuldyz, A. A. Imanalinova, L. A. Dimeyeva, and N. E. Zverev. "State of Saxaul Plantations in Kazakhstan’s Section of the Aral Sea Region." Central Asian Journal of Water Research 7, no. 1 (2020): 128–57. http://dx.doi.org/10.29258/cajwr/2020-r1.v7-1/128-157.eng.

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The article aims to assess the survival rate of saxaul plantations on the dry seabed of the Aral Sea (DSAS) and these close to the villages along the original seacoast. Protective black saxaul (Haloxylon ammodendron) plantations on the DSAS were established in the course of 2009-2019 with the grant support of the International Fund for Saving the Aral Sea (IFAS), Japan’s environmental funds, UNDP Kazakhstan, as well as under the Grass-Roots Program of the Embassy of Japan in Kazakhstan. During September 1-14, 2020, the target plantation plots at 24 sites adjacent to the villages of Aralkum and
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Medeiros, Robson Luis Silva de, Vênia Camelo de Souza, Miguel Avelino Barbosa Neto, Leandro De Araújo, Alex Da Silva Barbosa, and Rafael Luis Silva de Medeiros. "Estrutura da regeneração natural de Anadenanthera colubrina em fragmento de brejo de altitude em Bananeiras, PB." Pesquisa Florestal Brasileira 36, no. 86 (2016): 95. http://dx.doi.org/10.4336/2016.pfb.36.86.887.

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A destruição de habitats atrelada à fragmentação causa sérias consequências para qualquer tipo de vegetação, principalmente para a Mata Atlântica na Região Nordeste. Os Brejos de Altitudes Nordestinos são áreas que apresentam microclimas dissociantes das extensões onde estão inseridos. O conhecimento do potencial de regeneração natural é fundamental para a compreensão da dinâmica da vegetação. Este trabalho teve como objetivo avaliar a o recrutamento e a mortalidade de regenerantes de Anadenanthera colubrina ocorrente em fragmento florestal de Floresta Ombrófila Aberta. Em uma população de A.
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Landry, Stéphanie, Martin-Hugues St-Laurent, Gaetan Pelletier, and Marc-André Villard. "The Best of Both Worlds? Integrating Sentinel-2 Images and airborne LiDAR to Characterize Forest Regeneration." Remote Sensing 12, no. 15 (2020): 2440. http://dx.doi.org/10.3390/rs12152440.

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Sustainable forest management relies on practices ensuring vigorous post-harvest regeneration. Data on regeneration structure and composition are often collected through intensive field surveys. Remote sensing technologies (e.g., Light Detection and Ranging (LiDAR), satellite imagery) can cover a much larger spatial extent, but their ability to estimate regeneration characteristics is often challenged by the obstruction associated with canopy foliage. Here, we determined whether the integration of LiDAR and Sentinel-2 images can increase the accuracy of sapling density estimates and whether th
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Metcalfe, D. J., and P. J. Grubb. "Seed mass and light requirements for regeneration in Southeast Asian rain forest." Canadian Journal of Botany 73, no. 6 (1995): 817–26. http://dx.doi.org/10.1139/b95-090.

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Seed mass values are given for 140 species of primary lowland rain forest and associated secondary forests in Singapore. Among shade-tolerant species of primary forest there is a trend for a decrease in mean seed mass with tall trees > woody climbers > small trees > shrubs > herbs; the differences between tall trees and small trees or shrubs or herbs, and between herbs and small trees or woody climbers are significant. There are a few light-demanding herbs or shrubs in the primary forest; among small trees, light demanders have significantly lower seed mass values than shade tolera
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Remeš, Jiří. "Development and Present State of Close-to-Nature Silviculture." Journal of Landscape Ecology 11, no. 3 (2018): 17–32. http://dx.doi.org/10.2478/jlecol-2018-0010.

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Abstract Close to nature silviculture is an alternative to a forest management system based on the clear cutting regeneration and cultivation of even-aged coniferous monocultures. The history of close to nature silviculture dates back to the second half of the 19th century, when the first attempts were made in Central Europe for more sophisticated silvicultural practices based on natural small-scale regeneration and management of mixed stands. These activities also affected the Czech lands, where the ideas of close to nature silviculture were successfully developed by the end of the 1960s. For
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Flynn, Erin M., Susan M. Jones, Menna E. Jones, Gregory J. Jordan, and Sarah A. Munks. "Characteristics of mammal communities in Tasmanian forests: exploring the influence of forest type and disturbance history." Wildlife Research 38, no. 1 (2011): 13. http://dx.doi.org/10.1071/wr10025.

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Context With increasing pressure worldwide on forest habitat, it is crucial to understand faunal ecology to effectively manage and minimise impacts of anthropogenic habitat disturbance. Aims This study assessed whether differences in forest type and disturbance history were reflected in small to medium mammal communities found in Tasmania’s production forests. Methods Trapping was conducted in spring and summer, and autumn and winter during 2007–08 at four dry Eucalyptus forest sites (two regenerating after harvest and two in relatively undisturbed forest) in south-east Tasmania, and four wet
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Zhao, Jun, Xiao Feng Zhang, and Han Bing Luo. "Simulation of Three-Dimensional Dynamic Cutting Forces and Chatter Stability in Ball-End Milling." Key Engineering Materials 443 (June 2010): 302–7. http://dx.doi.org/10.4028/www.scientific.net/kem.443.302.

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By taking into account the regenerative chatter vibration, a nonlinear dynamics model for high speed ball-end milling is proposed. The effect of dynamic components of milling forces on chatter is analyzed. A method to predict the stability limits of high speed ball-end milling process is proposed and the stability lobes diagram is simulated. The comparison of experimental milling forces with the simulation results indicates the high accuracy of the model and the effectiveness of the simulation algorithms. The proposed method provides a theoretical instruction for parameters selection and optim
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Petrone, R. M., L. Chasmer, C. Hopkinson, et al. "Effects of harvesting and drought on CO2 and H2O fluxes in an aspen-dominated western boreal plain forest: early chronosequence recovery." Canadian Journal of Forest Research 45, no. 1 (2015): 87–100. http://dx.doi.org/10.1139/cjfr-2014-0253.

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This study examines the hydrological recovery of two regenerating boreal trembling aspen (Populus tremuloides Michx.) dominated stands and the sensitivity of that regeneration to drought within the first 5 years of establishment. The results indicate that evapotranspiration fluxes and water-use efficiency rebounded quickly as a result of new vegetation foliage growth and wet conditions found within the first 2 years following the harvest. However, a period of dry years had a significant influence on rates of postharvest growth, carbon dioxide (CO2), and water fluxes at these sites. The norther
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Potts, Donald F. "Water potential of forest duff and its possible relationship to regeneration success in the northern Rocky Mountains." Canadian Journal of Forest Research 15, no. 2 (1985): 464–68. http://dx.doi.org/10.1139/x85-074.

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Organic material moisture characteristic curves (water potential versus moisture content) from the literature are compared with field observations of duff moisture content through the summer of 1981. The field site was a seed-tree harvest in a subalpine fir – menziesia habitat type (1830 m elevation; north aspect; 30° slope). It may be inferred that duff water potentials reached −1.5 MPa early in July and may have exceeded −100 MPa in August, that duff moisture was unavailable for regeneration through the end of September, and that seedling mortality would be extensive. The severity and durati
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Kanjevac, Branko, Milun Krstić, Violeta Babić, and Zoran Govedar. "Regeneration Dynamics and Development of Seedlings in Sessile Oak Forests in Relation to the Light Availability and Competing Vegetation." Forests 12, no. 4 (2021): 384. http://dx.doi.org/10.3390/f12040384.

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Natural regeneration of sessile oak forests is a complex process whose final outcome is influenced by numerous factors. The initial phase of development of sessile oak seedlings stands out as the most critical period in the process of natural regeneration of sessile oak forests. As the available light and competition from the accompanying woody species and ground vegetation are some of the main predictors of the success of sessile oak forest regeneration, this paper presents the results of studying the influence of these factors on the regeneration dynamics and development of sessile oak seedl
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Acosta-Vargas, Luis, Adriana E. Rovere, and Jorge Camacho-Sandoval. "Effectiveness of two treatments to promote tree regeneration: implications for forest restoration in the Isla del Coco National Park, Costa Rica." Revista de Biología Tropical 68, S1 (2020): S103—S114. http://dx.doi.org/10.15517/rbt.v68is1.41172.

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Introduction: Isla del Coco is the only island in the Eastern Tropical Pacific with humid tropical forests; 296 plant species are reported, of them, 22% are endemic. Their ecology is poorly understood. Deforestation and the introduction of rats, feral pigs and white-tailed deer are the primary agents of forest degradation. After more than 120 years, the deforested areas have never recovered the native forest. Objective: To analyse if the deforested area keeps its resilience, we evaluated the natural regeneration and ecological processes associated. Methods: From August 2016 to June 2018, we co
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Marcolin, Enrico, Raffaella Marzano, Alessandro Vitali, Matteo Garbarino, and Emanuele Lingua. "Post-Fire Management Impact on Natural Forest Regeneration through Altered Microsite Conditions." Forests 10, no. 11 (2019): 1014. http://dx.doi.org/10.3390/f10111014.

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High severity stand-replacing wildfires can deeply affect forest ecosystems whose composition includes plant species lacking fire-related traits and specific adaptations. Land managers and policymakers need to be aware of the importance of properly managing these ecosystems, adopting post-disturbance interventions designed to reach management goals, and restoring the required ecosystem services. Recent research frequently found that post-fire salvage logging negatively affects natural regeneration dynamics, thereby altering successional pathways due to a detrimental interaction with the preced
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34

Cuyckens, Griet An Erica, Flavia Mazzini, Rocío F. Julián, David E. Medina, and Gustavo F. Guzmán. "Effect of livestock on regeneration of queñoa (Polylepis australis Bitt.) forest in the Southern Andean Yungas of northwestern Argentina." Revista Chapingo Serie Ciencias Forestales y del Ambiente 27, no. 2 (2020): 215–28. http://dx.doi.org/10.5154/r.rchscfa.2020.05.035.

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Introduction: Polylepis forest is an ecosystem stated with conservation priority and threatened by anthropogenic effects; extensive livestock is one of the most frequent disturbances. Objective: To study the effect of livestock on the early stages of regeneration of a queñoa (Polylepis australis Bitt.) forest. Materials and methods: Within a pure forest of P. australis at Parque Provincial Potrero de Yala, Jujuy, Argentina, densities of seedlings (˂1 year) and saplings (˃1 year and ˂30 cm) were measured in the presence (0.23 heads∙ha-1) and absence of livestock, for a year. Linear mixed models
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Feng, Hsi-Yung, and Chia-Hsiang Menq. "A Flexible Ball-End Milling System Model for Cutting Force and Machining Error Prediction." Journal of Manufacturing Science and Engineering 118, no. 4 (1996): 461–69. http://dx.doi.org/10.1115/1.2831055.

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This paper presents a flexible system model for the prediction of cutting forces and the resulting machining errors in the ball-end milling process. Unlike the previously developed rigid system model, the present model takes into account the instantaneous and regenerative feedback of cutting system deflections to establish the chip geometry in the cutting force calculation algorithm. The deflection-dependent chip geometry is identified by using an iterative procedure to balance the cutting forces and the associated cutting system deflections. A series of steady state 3D cross-feed ball-end mil
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36

Drew, Allan P. "Fern and aster effects on black cherry shelterwood regeneration." Canadian Journal of Forest Research 20, no. 9 (1990): 1513–14. http://dx.doi.org/10.1139/x90-200.

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Regeneration of black cherry (Prunusserotina Ehrh.) is difficult on northeast United States forest sites that are dominated by hay-scented fern (Dennstaedtiapunctilobula Michx.). The growth of black cherry seedlings beneath fern and whorled wood aster (Asteracuminatus Michx.) ground cover was monitored for eight growing seasons on weeded and unweeded plots following a shelterwood seed cutting. Black cherry seedlings on plots that were weeded to remove ferns during years 2 through 4 were significantly taller than seedlings on unweeded controls by the end of the 6th year. Yet they still were not
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37

Tullus, Tea, Reimo Lutter, Tiina Randlane, et al. "Seventy-year history of management using low-intensity harvesting methods: weak impact on biodiversity of hemiboreal Scots pine forests." Canadian Journal of Forest Research 50, no. 12 (2020): 1268–80. http://dx.doi.org/10.1139/cjfr-2020-0102.

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Less intensive harvesting methods (e.g., selection cutting, shelterwood cuttings) are recommended as alternatives to clearcutting for maintaining mature forest biodiversity in the process of forest regeneration. However, the long-term impact of low-intensity harvesting methods has rarely been studied. Our aim was to clarify the long-term effects of repeated selective cutting, thinning, and shelterwood cutting on the richness, abundance, and species composition of vascular plants, bryophytes, and lichens in Scots pine forests (Pinus sylvestris L.). Data were collected from 25 mature stands loca
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Ferron, Jean, François Potvin, and Christian Dussault. "Short-term effects of logging on snowshoe hares in the boreal forest." Canadian Journal of Forest Research 28, no. 9 (1998): 1335–43. http://dx.doi.org/10.1139/x98-113.

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We investigated snowshoe hare (Lepus americanus Erxleben) abundance, home range size, daily movements, survival, and habitat utilization in black spruce (Picea mariana (Mill.) BSP) stands before and after clearcuts with protection of regeneration (CPR) in southwestern Quebec. Hare abundance was indexed by pellet counts in permanent plots 2 years before and over 4 years following logging (1991-1996). Home range size, daily movements, survival, and habitat use were measured by radiotracking 16 hares before and after logging, during 3 months between May and August 1992; some additional fixes were
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Yan, Qiaoling, Qun Gang, and Jiaojun Zhu. "Size-Dependent Patterns of Seed Rain in Gaps in Temperate Secondary Forests, Northeast China." Forests 10, no. 2 (2019): 123. http://dx.doi.org/10.3390/f10020123.

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Secondary forests have become the major forest type worldwide, and are experiencing various disturbances and exhibiting obvious vegetation degradation (e.g., reduced biodiversity and decreased productivity) compared with primary forests. Forest gap is a common small-scale disturbance in secondary forests. Promoting natural regeneration under gap disturbance is an important approach to recover biodiversity and ecosystem services for temperate secondary forests. The gap size is the crucial characteristic controlling natural regeneration of many tree species. However, little is known about the sp
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40

Litinsky, Peter. "Analysis of the dynamics of anthropogenic changes in ecosystems of the Kem River catchment (White Sea basin) using Global Forest Change data." InterCarto. InterGIS 26, no. 2 (2020): 396–407. http://dx.doi.org/10.35595/2414-9179-2020-2-26-396-407.

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The analysis of changes in the catchment vegetation cover as a result of industrial development of its territory, primarily deforestation, was carried out. For processing Landsat images, the spectral space modeling method was used, which provides higher reliability of the classification results compared to traditional methods. The most significant changes in the catchment occurred from the 1930s (the beginning of large-scale logging), until the end of the 1990s. Significantly, by more than 60 %, the area of old-growth forests decreased, their large fragments remained only in nature protected a
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Slocum, Matthew G., T. Mitchell Aide, Jess K. Zimmerman, and Luis Navarro. "Natural regeneration of subtropical montane forest after clearing fern thickets in the Dominican Republic." Journal of Tropical Ecology 20, no. 4 (2004): 483–86. http://dx.doi.org/10.1017/s0266467404001646.

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Tropical forests can recover after anthropogenic disturbances of light to moderate intensity (Aide et al. 1995, 1996, 2000; Uhl 1987, Uhl et al. 1988); however, severe disturbances (e.g. compaction or loss of soil) often result in conditions that prevent forest recovery. These degraded sites are often dominated by grasses (Aide & Cavelier 1994, Cabin et al. 2002, Cavelier et al. 1998, Uhl et al. 1988) and ferns (Cohen et al. 1995, García et al. 1994, Slocum et al. 2000, Walker & Boneta 1995) that can impose barriers for tree regeneration and arrest the succession process. Important bar
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42

Yang, Zhiqiang, Warren B. Cohen, and Mark E. Harmon. "Modeling early forest succession following clear-cutting in western Oregon." Canadian Journal of Forest Research 35, no. 8 (2005): 1889–900. http://dx.doi.org/10.1139/x05-132.

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In the Pacific Northwest, the process of conifer development after stand-replacing disturbance has important implications for many forest processes (e.g., carbon storage, nutrient cycling, and biodiversity). This paper examines conifer development in the Coast Range Province and Western Cascades Province of Oregon using repeat interpretation of historic aerial photographs from 1959 to 1997 to examine the canopy cover change of different life forms: shrubs, hardwood trees, and conifer trees. Ninety-four stands from the Western Cascades Province and 59 stands from the Coast Range Province were p
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43

Rebollo, Salvador, José María Rey-Benayas, Pedro Villar-Salvador, et al. "Services provided by birds (high-mobile link species) in farmland and forest mosaics: forest regeneration and plague regulation." Ecosistemas 28, no. 2 (2019): 32–41. http://dx.doi.org/10.7818/ecos.1736.

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Wright, Elaine F., K. Dave Coates, and Paula Bartemucci. "Regeneration from seed of six tree species in the interior cedar-hemlock forests of British Columbia as affected by substrate and canopy gap position." Canadian Journal of Forest Research 28, no. 9 (1998): 1352–64. http://dx.doi.org/10.1139/x98-117.

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Canopy gap size can play a major role in determining composition of tree regeneration after disturbance. The effect of different positions within gaps and within the intact forest has received less study. We seeded six tree species onto two substrates (organic and undisturbed moss) in three positions along a north-south gradient within eight replicate 600-m2 canopy gaps and in the intact forest south of each gap (the gap positions), in 1995 and 1996. Emergence of all species was strongly affected by gap position, seedbed substrate, and year, but there was little evidence of partitioning by gap
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45

Wong, Marina. "Trophic Organization of Understory Birds in a Malaysian Dipterocarp Forest." Auk 103, no. 1 (1986): 100–116. http://dx.doi.org/10.1093/auk/103.1.100.

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Abstract Single-sample studies suggested that understory flowers and fruits and their avian consumers are scarce in the Malaysian rain forest as compared with African and Central American rain forests. Results from my longer-term studies at Pasoh Forest Reserve (Negeri Sembilan, Peninsular Malaysia) established that flowers and fruits were consistently rare as food for birds. A comparison of two forest types at Pasoh revealed the effect of lower food availability on avian trophic organization. Food resources (e.g. flowers, fruits, arthropods) were less abundant in the regenerating than in the
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46

Peña-Claros, Marielos, and Henneleen De Boo. "The effect of forest successional stage on seed removal of tropical rain forest tree species." Journal of Tropical Ecology 18, no. 2 (2002): 261–74. http://dx.doi.org/10.1017/s0266467402002171.

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Seed removal was evaluated at the macro- and micro-habitat level in areas differing in successional stage in the Bolivian Amazon. The successional stages consisted of secondary forests of 2, 10 and 20 years old and primary forest. Seeds of nine tree species were artificially dispersed and the number of seeds removed was evaluated over 7 weeks. Several stand characteristics were measured at the sites where seeds were dispersed. Seed removal at the end of the experiment varied from 50 to 100% depending on the species, and from 74 to 90% depending on successional stage. In general, the removal ra
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47

Jäärats, Andres, and Arvo Tullus. "The effect of planting stock and soil scarification on forest regeneration." Forestry Studies 69, no. 1 (2018): 75–85. http://dx.doi.org/10.2478/fsmu-2018-0013.

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Abstract The present research is a comparative analysis of how the main quality indices of containerized and barerooted coniferous (Norway spruce (Picea abies (L.) Karst.) and Scots pine (Pinus sylvestris L.)) planting stock conform to the existing standards in Estonia, how the plantation development depends on planting stock and natural regeneration on soil scarification. The height of Scots pine containerized seedlings exceeded that of barerooted seedlings by 20%. The height of barerooted Norway spruce transplants exceeded that of containerized seedlings by 19%. The root-collar diameter of c
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48

Deans, Aaron M., Jay R. Malcolm, Sandy M. Smith, and Terance J. Carleton. "A comparison of forest structure among old-growth, variable retention harvested, and clearcut peatland black spruce (Picea mariana) forests in boreal northeastern Ontario." Forestry Chronicle 79, no. 3 (2003): 579–89. http://dx.doi.org/10.5558/tfc79579-3.

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Harvesting techniques that retain structural elements of the original forest may help to preserve the characteristic ecological features and biological diversity of old-growth forests. Harvesting with advance regeneration protection (HARP) is one such technique practised in the Lake Abitibi Model Forest of northeastern Ontario on peatland sites. In this system, winter harvesting operations clear trees in strips about 5–7 m wide and using a minimum diameter limit cut extract trees from the adjacent residual forest rows, 5–9 m wide. In order to assess the effectiveness of HARP in retaining fores
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49

Wang, G. Geoff, and Kevin J. Kemball. "Effects of fire severity on early development of understory vegetation." Canadian Journal of Forest Research 35, no. 2 (2005): 254–62. http://dx.doi.org/10.1139/x04-177.

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Four boreal mixedwood stands burned by the 1999 Black River wildfire in southeastern Manitoba were sampled to examine the effects of fire severity on early regeneration dynamics of understory vegetation. In each stand, three fire severity classes (scorched, lightly burned, and severely burned) were identified based on the degree of forest floor consumption, and six plots per severity class were randomly selected. Variation in fire severity significantly affected the initial regeneration of the understory plant community. Regeneration response after fire was largely controlled by interactions b
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Kärenlampi, Petri P. "Capital Return Rate and Carbon Storage on Forest Estates of Three Boreal Tree Species." Sustainability 13, no. 12 (2021): 6675. http://dx.doi.org/10.3390/su13126675.

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In this study, the capital return rate and carbon storage on forest estates with three boreal tree species are discussed. A growth model is applied, along with verified yield models of sawlogs and veneer logs. Using the normal forest principle, thinning schedules and rotation ages maximizing the estate-level capital return rate are clarified. Regeneration expenses are amortized at the end of any rotation. Capitalizations are greater and rotations longer than in recent studies. The capital return rate is a weak function of initial stem count and rotation age but differs by tree species. The ini
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