Abstract The composition and structure of breeding bird communities in the Borki Forest in North-Eastern Poland were investigated separately in the forest interior (years 2012–2014) and at the forest edge (years 2016–2018). In both areas, bird censuses were carried out on three plots located in mature oak-hornbeam, ash-alder and mixed coniferous forest stands. Plots were selected to cover similar forest types, encompass stands of similar age and to have similar acreage, both, in the forest interior and at the forest edge. A standard combined mapping technique for estimating the number of breeding birds was applied and a total of 97 bird species were found to have bred at least once within any plot. Regardless of the forest type, both the number of breeding bird species and the population densities were higher on plots situated at the forest edge than in the forest interior. The mean number of breeding species was over 20% higher and the mean total density of breeding pairs was higher by over 30%. Total population densities on the plots located at the forest edge were higher as a result of an increase in population densities of some individual bird species combined with an increase in the number of breeding species, including non-forest and non-typical forest interior species. The number of nesting species in the edge zone was higher than in the forest interior with common species and generalists clearly dominating. Specialist species typical of natural forests as well as rare and endangered species, such as three-toed woodpecker (Picoides tridactylus), white-backed woodpecker (Dendrocopos leucotos), collared flycatcher (Ficedula albicollis) and red-breasted flycatcher (Ficedula parva), for whom the Borki Forest is an important breeding site in Poland were less numerous. Despite the observed differences and a clear edge effect, bird assemblages inhabiting research plots in the forest interior and at the edge were not fundamentally different. We conclude that the edge zone is inhabited by a poorer-quality variant of bird assemblage typical of forest interior, enriched quantitatively by non-forest species associated with open and/or semi-open areas as well as by synanthropic species.
{"title":"Breeding avifauna of the forest interior and forest edge in the Borki Forest","authors":"G. Ra̧kowski, K. Czarnocki","doi":"10.2478/frp-2019-0003","DOIUrl":"https://doi.org/10.2478/frp-2019-0003","url":null,"abstract":"Abstract The composition and structure of breeding bird communities in the Borki Forest in North-Eastern Poland were investigated separately in the forest interior (years 2012–2014) and at the forest edge (years 2016–2018). In both areas, bird censuses were carried out on three plots located in mature oak-hornbeam, ash-alder and mixed coniferous forest stands. Plots were selected to cover similar forest types, encompass stands of similar age and to have similar acreage, both, in the forest interior and at the forest edge. A standard combined mapping technique for estimating the number of breeding birds was applied and a total of 97 bird species were found to have bred at least once within any plot. Regardless of the forest type, both the number of breeding bird species and the population densities were higher on plots situated at the forest edge than in the forest interior. The mean number of breeding species was over 20% higher and the mean total density of breeding pairs was higher by over 30%. Total population densities on the plots located at the forest edge were higher as a result of an increase in population densities of some individual bird species combined with an increase in the number of breeding species, including non-forest and non-typical forest interior species. The number of nesting species in the edge zone was higher than in the forest interior with common species and generalists clearly dominating. Specialist species typical of natural forests as well as rare and endangered species, such as three-toed woodpecker (Picoides tridactylus), white-backed woodpecker (Dendrocopos leucotos), collared flycatcher (Ficedula albicollis) and red-breasted flycatcher (Ficedula parva), for whom the Borki Forest is an important breeding site in Poland were less numerous. Despite the observed differences and a clear edge effect, bird assemblages inhabiting research plots in the forest interior and at the edge were not fundamentally different. We conclude that the edge zone is inhabited by a poorer-quality variant of bird assemblage typical of forest interior, enriched quantitatively by non-forest species associated with open and/or semi-open areas as well as by synanthropic species.","PeriodicalId":35347,"journal":{"name":"USDA Forest Service - Research Papers PNW-RP","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85133679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Nasiłowska, J. Kotlarz, M. Kacprzak, Alicja E. Rynkiewicz, Karol Rotchimmel, K. Kubiak
Abstract The main aim of this research was to determine the impact of drought (in 2015) on forests stand condition using remote sensing and statistical techniques. The study was based on the analysis of vegetation indices calculated from a series of Landsat-8 OLI satellite images covering the 2014 and 2015 growing seasons. Various tree biophysical and physical parameters as well as forest habitat characteristics were tested in order to find the most significant factors affecting drought resistance. Three approaches were used: (i) index differences, (ii) PCA analysis, and (iii) ANOVA statistical analysis. All three approaches used in this study indicate that forest biodiversity is the most important factor determining habitat response to stress conditions. Coniferous and mixed tree habitats were less sensitive than deciduous ones. Statistical analysis revealed the relationship between stress and soil types, as those more permeable were less dependent on rainwater. The highest stress was found for precipitation-dependent gley soils. Undergrowth density and height were also indicated as important factors inducing habitat response to a changing weather situation. All the results confirmed the usefulness of mid-infrared based indices for water shortage monitoring in forests. They confirmed that habitat biodiversity has a positive effect on its resistance to stressful conditions. Also forest type (conifer/deciduous) determines it’s sensitivity. Precipitation and groundwater shortages have different effects on the forest condition depending on soil type.
{"title":"The impact of drought in 2015 on the health forest condition determined using Landsat-8 OLI images","authors":"S. Nasiłowska, J. Kotlarz, M. Kacprzak, Alicja E. Rynkiewicz, Karol Rotchimmel, K. Kubiak","doi":"10.2478/frp-2019-0005","DOIUrl":"https://doi.org/10.2478/frp-2019-0005","url":null,"abstract":"Abstract The main aim of this research was to determine the impact of drought (in 2015) on forests stand condition using remote sensing and statistical techniques. The study was based on the analysis of vegetation indices calculated from a series of Landsat-8 OLI satellite images covering the 2014 and 2015 growing seasons. Various tree biophysical and physical parameters as well as forest habitat characteristics were tested in order to find the most significant factors affecting drought resistance. Three approaches were used: (i) index differences, (ii) PCA analysis, and (iii) ANOVA statistical analysis. All three approaches used in this study indicate that forest biodiversity is the most important factor determining habitat response to stress conditions. Coniferous and mixed tree habitats were less sensitive than deciduous ones. Statistical analysis revealed the relationship between stress and soil types, as those more permeable were less dependent on rainwater. The highest stress was found for precipitation-dependent gley soils. Undergrowth density and height were also indicated as important factors inducing habitat response to a changing weather situation. All the results confirmed the usefulness of mid-infrared based indices for water shortage monitoring in forests. They confirmed that habitat biodiversity has a positive effect on its resistance to stressful conditions. Also forest type (conifer/deciduous) determines it’s sensitivity. Precipitation and groundwater shortages have different effects on the forest condition depending on soil type.","PeriodicalId":35347,"journal":{"name":"USDA Forest Service - Research Papers PNW-RP","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87800178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. Mederski, K. Werk, M. Bembenek, Z. Karaszewski, Mariusz Brunka, Kwiryn Naparty
Abstract Obtaining high harvester efficiency in young pine stands during early thinning is achallenging management practice. One of the difficulties lies in achieving the optimal use of the tree trunk for assortments and obtaining satisfactory timber quality. The objective of this research was to find out 1) how much of the tree trunk can be processed by a harvester to produce logs, and 2) the quality of the assortments in terms of log length accuracy and delimbing quality. The work was carried out in a 31-year-old pine stand in northern Poland with the Vimek 404 5T harvester with the Keto Forst Silver head for early thinning. Eighty sample plots were set up within the stand for detailed tree analysis after harvesting. The total length of the assortments from each tree was measured as well as the minimal top diameter (under bark). Additionally, the lengths of the bottom, middle and top logs were measured as well as the height of the knots after delimbing. On average, 70% of the total tree height was used for assortments and logs were processed up to a mean top diameter of 5.3 cm under bark. The length accuracy was very high: 90% of the logs had the expected length, more than 9% had a commercially acceptable length, while only 0.7% of the logs were too long. After delimbing, the knots were of a maximum height of 2 cm. Using the Vimek 404 5T harvester in the 31-year-old pine stand was an effective solution for trunk processing and obtaining quality assortments.
{"title":"Harvester efficiency in trunk utilisation and log quality of early thinning pine trees","authors":"P. Mederski, K. Werk, M. Bembenek, Z. Karaszewski, Mariusz Brunka, Kwiryn Naparty","doi":"10.2478/frp-2019-0004","DOIUrl":"https://doi.org/10.2478/frp-2019-0004","url":null,"abstract":"Abstract Obtaining high harvester efficiency in young pine stands during early thinning is achallenging management practice. One of the difficulties lies in achieving the optimal use of the tree trunk for assortments and obtaining satisfactory timber quality. The objective of this research was to find out 1) how much of the tree trunk can be processed by a harvester to produce logs, and 2) the quality of the assortments in terms of log length accuracy and delimbing quality. The work was carried out in a 31-year-old pine stand in northern Poland with the Vimek 404 5T harvester with the Keto Forst Silver head for early thinning. Eighty sample plots were set up within the stand for detailed tree analysis after harvesting. The total length of the assortments from each tree was measured as well as the minimal top diameter (under bark). Additionally, the lengths of the bottom, middle and top logs were measured as well as the height of the knots after delimbing. On average, 70% of the total tree height was used for assortments and logs were processed up to a mean top diameter of 5.3 cm under bark. The length accuracy was very high: 90% of the logs had the expected length, more than 9% had a commercially acceptable length, while only 0.7% of the logs were too long. After delimbing, the knots were of a maximum height of 2 cm. Using the Vimek 404 5T harvester in the 31-year-old pine stand was an effective solution for trunk processing and obtaining quality assortments.","PeriodicalId":35347,"journal":{"name":"USDA Forest Service - Research Papers PNW-RP","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80171064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The aim of the research was to review the legal and regulatory framework that controls the use of non-wood forest products and tourism in forests in Belarus and to analyze current information on harvesting of non-wood forest products such as berries, mushrooms, birch sap, honey, medicinal plants, and minor forest resources as well as to study the state of ecotourism in the territory of the forest fund. We demonstrated that the legal base needs to be improved. In particular, the taxes should be redistributed from economic entities involved in collateral forest use to the Ministry of Forestry that manages the forests. Despite the increased anthropogenic impact on understory layers and the adverse global climatic changes of recent decades, the productive capacity of non-wood forest resources in Belarus remains significant. Nevertheless, the resources are not exploited appropriately, although the demand for products in the domestic and foreign markets is consistently high. In this regard, it is necessary to create suitable conditions for stakeholders, including those possessing foreign capital, to participate in economic activity, whilst preserving the coordinating and controlling functions of the Ministry of Forestry as it is the main forest fund holder in the country. Efforts are also being made to develop infrastructure for ecotourism in forests. However, the level of marketing activities aimed at promoting and providing consumers with available tourist products and services does not meet modern requirements.
{"title":"The use of non-wood forest products and forest tourism in Belarus","authors":"A. Marozau, Nikolaj Kowbasa","doi":"10.2478/frp-2019-0007","DOIUrl":"https://doi.org/10.2478/frp-2019-0007","url":null,"abstract":"Abstract The aim of the research was to review the legal and regulatory framework that controls the use of non-wood forest products and tourism in forests in Belarus and to analyze current information on harvesting of non-wood forest products such as berries, mushrooms, birch sap, honey, medicinal plants, and minor forest resources as well as to study the state of ecotourism in the territory of the forest fund. We demonstrated that the legal base needs to be improved. In particular, the taxes should be redistributed from economic entities involved in collateral forest use to the Ministry of Forestry that manages the forests. Despite the increased anthropogenic impact on understory layers and the adverse global climatic changes of recent decades, the productive capacity of non-wood forest resources in Belarus remains significant. Nevertheless, the resources are not exploited appropriately, although the demand for products in the domestic and foreign markets is consistently high. In this regard, it is necessary to create suitable conditions for stakeholders, including those possessing foreign capital, to participate in economic activity, whilst preserving the coordinating and controlling functions of the Ministry of Forestry as it is the main forest fund holder in the country. Efforts are also being made to develop infrastructure for ecotourism in forests. However, the level of marketing activities aimed at promoting and providing consumers with available tourist products and services does not meet modern requirements.","PeriodicalId":35347,"journal":{"name":"USDA Forest Service - Research Papers PNW-RP","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87865596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract This study was carried out in the clone archive of old Scots pine Pinus sylvestris L. trees located in the Augustowska Primeval Forest. The aim of the study was to determine the intra-clonal diversity among quantitative and qualitative traits of the vegetative progeny of Scots pine trees older than 200 years. Our analyses included traits such as survival rate, height and diameter at breast height (DBH), stem straightness, length and width of the crowns as well as branch thickness and growth angle. There was no significant correlation between the age of mother trees and the traits of their vegetative progeny. However, mother trees did affect the survival of the progeny. In overall, the survival rate of grafts in the archive is high (about 80% at the age of 13 years) and there have been no significant fluctuations in recent years. Nevertheless, the variability of quantitative traits among vegetative progeny was high with the average height ranging from 2.16 m up to 6.71 m, and in the case of DBH, ranging from 3.23 cm to 12.1 cm. Both, height of trees and their DBH, were significantly different among the analysed clones. These intra-clone differences in growth traits indicate a high environmental impact on the growth and performance of clones. However, the diversity of quantitative and qualitative traits is comparable to the differences observed in the economic seed orchards with seedlings at a similar age. Most of the genotypes planted in the archive are fully viable and have matured to the stage of seed production. The clone archive can thus be viewed as both, a conservation effort and to obtain valuable seeds from the point of view of tree breeding. Therefore, establishing archives of tree clones using valuable genotypes is an effective method of conserving individual genotypes even of very old individuals.
{"title":"Variability of old Scots pine Pinus sylvestris L. vegetative progeny from the Augustowska Primeval Forests","authors":"Małgorzata Matras-Zarzecka, Artur Zarzecki","doi":"10.2478/frp-2019-0006","DOIUrl":"https://doi.org/10.2478/frp-2019-0006","url":null,"abstract":"Abstract This study was carried out in the clone archive of old Scots pine Pinus sylvestris L. trees located in the Augustowska Primeval Forest. The aim of the study was to determine the intra-clonal diversity among quantitative and qualitative traits of the vegetative progeny of Scots pine trees older than 200 years. Our analyses included traits such as survival rate, height and diameter at breast height (DBH), stem straightness, length and width of the crowns as well as branch thickness and growth angle. There was no significant correlation between the age of mother trees and the traits of their vegetative progeny. However, mother trees did affect the survival of the progeny. In overall, the survival rate of grafts in the archive is high (about 80% at the age of 13 years) and there have been no significant fluctuations in recent years. Nevertheless, the variability of quantitative traits among vegetative progeny was high with the average height ranging from 2.16 m up to 6.71 m, and in the case of DBH, ranging from 3.23 cm to 12.1 cm. Both, height of trees and their DBH, were significantly different among the analysed clones. These intra-clone differences in growth traits indicate a high environmental impact on the growth and performance of clones. However, the diversity of quantitative and qualitative traits is comparable to the differences observed in the economic seed orchards with seedlings at a similar age. Most of the genotypes planted in the archive are fully viable and have matured to the stage of seed production. The clone archive can thus be viewed as both, a conservation effort and to obtain valuable seeds from the point of view of tree breeding. Therefore, establishing archives of tree clones using valuable genotypes is an effective method of conserving individual genotypes even of very old individuals.","PeriodicalId":35347,"journal":{"name":"USDA Forest Service - Research Papers PNW-RP","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81701478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Bodziarczyk, J. Szwagrzyk, T. Zwijacz-Kozica, Antoni Zięba, J. Szewczyk, A. Gazda
Abstract The composition and structure of forest stands in the Tatra National Park were examined using data gathered in 2016 and 2017 from 617 circular sample plots (0.05 ha each). The diameter at breast height of all living trees, standing dead trees, snags, and wind throws was measured along with diameters and lengths of fallen logs within the plot boundaries. Tree height was measured for all living trees within the core (0.01 ha) of the sample plots. Using the obtained data, height-diameter curves were calculated for all major tree species and in the case of spruce, the height-diameter relationships were also calculated separately for each of the three elevation zones (up to 1200 m, between 1200 and 1400 m, above 1400 m). For each elevation zone and park protection zone, we also determined the volumes of live and dead trees. The volume of living trees in the Tatra National Park amounted to 259 m3/ha, which was higher than the volume of dead trees (176 m3/ha). Snags constituted the largest part of the dead wood whilst over 97% of the standing dead trees were spruce Picea abies. Among living trees, the share of spruce ranged from 81% in the low elevation zone to 98% in the middle zone. Other significant species in the lower zone were Abies alba (11%) and Fagus sylvatica (4.5%), while in the middle and upper elevation zones only Sorbus aucuparia occurred in significant numbers. Furthermore, in the lower elevation zone, Fagus sylvatica was the only species displaying significantly higher volumes in the ‘strict protection’ zone compared to the other park areas. In the ‘landscape protection’ zone, Picea abies was the most dominant species and the share of other species in the lowest elevation zones calculated based on tree density was smaller than calculated based on tree volume, indicating problems with stand conversion from spruce monoculture to mixed forest.
{"title":"The structure of forest stands in the Tatra National Park: The results of 2016–2017 inventory","authors":"J. Bodziarczyk, J. Szwagrzyk, T. Zwijacz-Kozica, Antoni Zięba, J. Szewczyk, A. Gazda","doi":"10.2478/frp-2019-0002","DOIUrl":"https://doi.org/10.2478/frp-2019-0002","url":null,"abstract":"Abstract The composition and structure of forest stands in the Tatra National Park were examined using data gathered in 2016 and 2017 from 617 circular sample plots (0.05 ha each). The diameter at breast height of all living trees, standing dead trees, snags, and wind throws was measured along with diameters and lengths of fallen logs within the plot boundaries. Tree height was measured for all living trees within the core (0.01 ha) of the sample plots. Using the obtained data, height-diameter curves were calculated for all major tree species and in the case of spruce, the height-diameter relationships were also calculated separately for each of the three elevation zones (up to 1200 m, between 1200 and 1400 m, above 1400 m). For each elevation zone and park protection zone, we also determined the volumes of live and dead trees. The volume of living trees in the Tatra National Park amounted to 259 m3/ha, which was higher than the volume of dead trees (176 m3/ha). Snags constituted the largest part of the dead wood whilst over 97% of the standing dead trees were spruce Picea abies. Among living trees, the share of spruce ranged from 81% in the low elevation zone to 98% in the middle zone. Other significant species in the lower zone were Abies alba (11%) and Fagus sylvatica (4.5%), while in the middle and upper elevation zones only Sorbus aucuparia occurred in significant numbers. Furthermore, in the lower elevation zone, Fagus sylvatica was the only species displaying significantly higher volumes in the ‘strict protection’ zone compared to the other park areas. In the ‘landscape protection’ zone, Picea abies was the most dominant species and the share of other species in the lowest elevation zones calculated based on tree density was smaller than calculated based on tree volume, indicating problems with stand conversion from spruce monoculture to mixed forest.","PeriodicalId":35347,"journal":{"name":"USDA Forest Service - Research Papers PNW-RP","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84445959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. Mederski, Dariusz Szczawiński, D. Giefing, Kwiryn Naparty, Mariusz Brunka
Abstract Artificial pruning of trees can improve wood quality as well as enhance timber value. Currently, pruning is quite common when veneer timber or plywood is in demand. Cutting off branches, however, creates open wounds in the form of knots, which are exposed to infections. While the pruning of coniferous trees is well-studied, less research has been conducted on broadleaved trees. The objective of this study was to determine 1) if the artificial pruning of oak can lead to decaying knots, 2) if so, how big is the decaying zone around the unsound knot, and 3) how much time is needed for full knot occlusion after artificial pruning. 13- and 16-year-old oak trees located in northern Poland (Lidzbark Forest District) were choosen for this study. Ten years after pruning, sample trees were selected in order to determine if the knots were sound and how many years it had taken for each knot to occlude. The results were compared with those of knots on trees caused by natural pruning. In total, 419 and 104 knots resulting from artificial and natural pruning, respectively, were analysed. It was found that 95% of the artificially pruned knots had very little decay, showing an average of 1.13 cm of unsound knot zone. On the naturally pruned control trees, 98% of the knots were unsound with nearly double the amount of knot decay zone. Additionally, the artificially pruned knots needed less than five years to overgrow, while it took over eleven years for the naturally pruned knots to occlude. Therefore, pruning oak trees is recommended, even though a very small decay zone may appear on the knots, because it takes half the time for these artificial knots to occlude in comparison to unpruned trees.
{"title":"Knot soundness and occlusion time after the artificial pruning of oak","authors":"P. Mederski, Dariusz Szczawiński, D. Giefing, Kwiryn Naparty, Mariusz Brunka","doi":"10.2478/frp-2019-0001","DOIUrl":"https://doi.org/10.2478/frp-2019-0001","url":null,"abstract":"Abstract Artificial pruning of trees can improve wood quality as well as enhance timber value. Currently, pruning is quite common when veneer timber or plywood is in demand. Cutting off branches, however, creates open wounds in the form of knots, which are exposed to infections. While the pruning of coniferous trees is well-studied, less research has been conducted on broadleaved trees. The objective of this study was to determine 1) if the artificial pruning of oak can lead to decaying knots, 2) if so, how big is the decaying zone around the unsound knot, and 3) how much time is needed for full knot occlusion after artificial pruning. 13- and 16-year-old oak trees located in northern Poland (Lidzbark Forest District) were choosen for this study. Ten years after pruning, sample trees were selected in order to determine if the knots were sound and how many years it had taken for each knot to occlude. The results were compared with those of knots on trees caused by natural pruning. In total, 419 and 104 knots resulting from artificial and natural pruning, respectively, were analysed. It was found that 95% of the artificially pruned knots had very little decay, showing an average of 1.13 cm of unsound knot zone. On the naturally pruned control trees, 98% of the knots were unsound with nearly double the amount of knot decay zone. Additionally, the artificially pruned knots needed less than five years to overgrow, while it took over eleven years for the naturally pruned knots to occlude. Therefore, pruning oak trees is recommended, even though a very small decay zone may appear on the knots, because it takes half the time for these artificial knots to occlude in comparison to unpruned trees.","PeriodicalId":35347,"journal":{"name":"USDA Forest Service - Research Papers PNW-RP","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87247069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract This article describes the methods for estimating the value of a forest, the accuracy of which is critical for purchases and sales, credit security, determining the shares in the division of forest real estate, as well as in determining the amount of compensation for losses in forest property. Compensation for property losses also includes past events that occurred before the Second World War, such as nationalization or loss of the forests in the eastern territories of the Second Polish Republic due to border changes. An equally important objective of forest valuation, which has recently gained in importance, is the inclusion of its value in a forest holding balance sheet. However, due to the lack of fully objective market prices for forest property, this work focused on the analysis of the quantitative and qualitative characteristics of the forest market and the methods of calculating the income (rent) value of the forest. Examples of commercial transactions from the forest market in the USA, Austria and Germany are included. The study presents a historical outline of forest valuation with particular emphasis on methods based on the income value, including forest rents. Furthermore, we discuss the formula of the perpetual capitalization of annuity and periodic annuity, including the impact of various net income calculations, that is, in arrears or in advance
{"title":"The Forest Market – Income Methods for Determining the Value of Forest Resources","authors":"A. Klocek, S. Zając","doi":"10.2478/frp-2019-0008","DOIUrl":"https://doi.org/10.2478/frp-2019-0008","url":null,"abstract":"Abstract This article describes the methods for estimating the value of a forest, the accuracy of which is critical for purchases and sales, credit security, determining the shares in the division of forest real estate, as well as in determining the amount of compensation for losses in forest property. Compensation for property losses also includes past events that occurred before the Second World War, such as nationalization or loss of the forests in the eastern territories of the Second Polish Republic due to border changes. An equally important objective of forest valuation, which has recently gained in importance, is the inclusion of its value in a forest holding balance sheet. However, due to the lack of fully objective market prices for forest property, this work focused on the analysis of the quantitative and qualitative characteristics of the forest market and the methods of calculating the income (rent) value of the forest. Examples of commercial transactions from the forest market in the USA, Austria and Germany are included. The study presents a historical outline of forest valuation with particular emphasis on methods based on the income value, including forest rents. Furthermore, we discuss the formula of the perpetual capitalization of annuity and periodic annuity, including the impact of various net income calculations, that is, in arrears or in advance","PeriodicalId":35347,"journal":{"name":"USDA Forest Service - Research Papers PNW-RP","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84308427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Dung beetles (Coleoptera: Geotrupidae) are an extremely important element of many ecosystems. Their activity allows the incorporation of mineral compounds trapped in faeces into the nutrient cycle. Seasonality and habitat preferences are the most important factors shaping the beetle communities inhabiting dung. The present study compares beetle communities inhabiting moose dung Alces alces L. in various forest ecosystems quantitatively and qualitatively. Due to the beetle seasonality, field work was performed from the beginning of March until the end of October 2017 in three habitats: coniferous forest, oak-hornbeam forest and alder forest. The dung beetles were collected using three Barber traps on each site baited with moose dung (80 g ± 10 g) and the traps were emptied as well as rebaited every 15 days. Altogether, 2330 specimen of dung beetles representing three species were collected: Anoplotrupes stercorosus (2088), Trypocopris vernalis (154) and Geotrupes stercorarius (88). These three species were found in all of the studied habitats. The largest total number of individuals was captured in the alder forest (1132 individuals), followed by the broadleaved forest (712) and the smallest number was captured in the coniferous forest (486). In terms of individuals caught, each species was statistically significantly different between the habitats. The largest number of A. stercorosus was captured in the alder forest, followed by the broadleaved forest and the smallest number was caught in the coniferous forest. however, the reverse was observed in the case of T. vernalis and G. stercorarius, where the most individuals were caught in the coniferous forest, and fewer in the broadleaved and alder forests. This is most likely due to the various habitat preferences of each individual species. Furthermore, the seasonal dynamics of this beetle family showed some differences between habitats. These differences most probably resulted from different microclimatic and humidity conditions.
{"title":"Seasonality and habitat preferences of dung beetles (Coleoptera: Geotrupidae) attracted to moose Alces alces L. dung in the Kampinos National Park","authors":"D. Marczak, R. Mroczyński","doi":"10.2478/frp-2018-0030","DOIUrl":"https://doi.org/10.2478/frp-2018-0030","url":null,"abstract":"Abstract Dung beetles (Coleoptera: Geotrupidae) are an extremely important element of many ecosystems. Their activity allows the incorporation of mineral compounds trapped in faeces into the nutrient cycle. Seasonality and habitat preferences are the most important factors shaping the beetle communities inhabiting dung. The present study compares beetle communities inhabiting moose dung Alces alces L. in various forest ecosystems quantitatively and qualitatively. Due to the beetle seasonality, field work was performed from the beginning of March until the end of October 2017 in three habitats: coniferous forest, oak-hornbeam forest and alder forest. The dung beetles were collected using three Barber traps on each site baited with moose dung (80 g ± 10 g) and the traps were emptied as well as rebaited every 15 days. Altogether, 2330 specimen of dung beetles representing three species were collected: Anoplotrupes stercorosus (2088), Trypocopris vernalis (154) and Geotrupes stercorarius (88). These three species were found in all of the studied habitats. The largest total number of individuals was captured in the alder forest (1132 individuals), followed by the broadleaved forest (712) and the smallest number was captured in the coniferous forest (486). In terms of individuals caught, each species was statistically significantly different between the habitats. The largest number of A. stercorosus was captured in the alder forest, followed by the broadleaved forest and the smallest number was caught in the coniferous forest. however, the reverse was observed in the case of T. vernalis and G. stercorarius, where the most individuals were caught in the coniferous forest, and fewer in the broadleaved and alder forests. This is most likely due to the various habitat preferences of each individual species. Furthermore, the seasonal dynamics of this beetle family showed some differences between habitats. These differences most probably resulted from different microclimatic and humidity conditions.","PeriodicalId":35347,"journal":{"name":"USDA Forest Service - Research Papers PNW-RP","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74772686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract In this paper, we present the results and analyse of tree height measurements, phenological observations (bud flushing), oak powdery mildew symptoms and multiple shoots of pedunculate oaks Quercus robur L. at the age of 12 years. The examined oaks belonged to 29 open pollination families. Family as well as individual heritability scored very highly for their respective indices. The calculated indices were 0.83 for tree height, 0.98 for flushing of buds, 0.53 for oak powdery mildew symptoms and 0.58 for the multi-stem index. Family seed orchards established using a completely randomized design are not a reliable substitute for progeny testing, because of the commonly small number of collected families.
摘要本文报道了有花序栎树(Quercus robur L.) 12年树龄的树高测量、物候观察(芽冲洗)、栎树白粉病症状和多芽的结果和分析。所研究的栎树属于29个开放授粉科。家族遗传力和个体遗传力在各自的指标上得分都很高。树高指数为0.83，花蕾冲洗指数为0.98，白粉病指数为0.53，多茎指数为0.58。采用完全随机设计建立的家庭种子园并不能可靠地替代后代试验，因为所收集的家庭数量通常很少。
{"title":"Tree testing and estimation of heritability using the pedunculate oak Quercus robur L. seed orchard in the Krotoszyn Forest District","authors":"W. Barzdajn, Maciej Bruder","doi":"10.2478/frp-2018-0031","DOIUrl":"https://doi.org/10.2478/frp-2018-0031","url":null,"abstract":"Abstract In this paper, we present the results and analyse of tree height measurements, phenological observations (bud flushing), oak powdery mildew symptoms and multiple shoots of pedunculate oaks Quercus robur L. at the age of 12 years. The examined oaks belonged to 29 open pollination families. Family as well as individual heritability scored very highly for their respective indices. The calculated indices were 0.83 for tree height, 0.98 for flushing of buds, 0.53 for oak powdery mildew symptoms and 0.58 for the multi-stem index. Family seed orchards established using a completely randomized design are not a reliable substitute for progeny testing, because of the commonly small number of collected families.","PeriodicalId":35347,"journal":{"name":"USDA Forest Service - Research Papers PNW-RP","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77417333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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