Forestry Studies最新文献_第5页

Effect of interaction between Fusarium solani and Rhizoctonia solani on damping-off and root rot disease of Tetraclinis articulata seedlings 茄枯菌与茄根丝核菌互作对四环木幼苗枯萎和根腐病的影响

Forestry Studies Pub Date : 2021-12-01 DOI: 10.2478/fsmu-2021-0018

Rachid El Haddadi, A. Errifi, S. Msairi, A. Touhami, A. Douira

引用次数: 0

Optimizing the pine wood drying process using a critical diffusion coefficient and a timed moistening impulse 利用临界扩散系数和定时湿润脉冲对松木干燥过程进行优化

Forestry Studies Pub Date : 2021-12-01 DOI: 10.2478/fsmu-2021-0017

H. Tamme, P. Muiste, V. Tamme

{"title":"Optimizing the pine wood drying process using a critical diffusion coefficient and a timed moistening impulse","authors":"H. Tamme, P. Muiste, V. Tamme","doi":"10.2478/fsmu-2021-0017","DOIUrl":"https://doi.org/10.2478/fsmu-2021-0017","url":null,"abstract":"Abstract This article demonstrates that it is possible to optimize the drying process for pine wood in two independent ways. Those ways involve either the use of the critical diffusion coefficient (DC) which is determined by the experiment shown below, and/or the drying air moistening impulse in the second drying phase. When processing data which has been gained from the pine wood drying experiment, both coincidences and differences were found when compared to the results from a simulation of the drying process which was carried out using the same drying schedule. There is a relatively good level of agreement between the drying experiment and the simulation results of TORKSIM v5.11 simulation program in the case of the simulated and experimentally determined drying curves. The magnitude of numerical values for the DC agrees with this finding, as do the wood's moisture profile in the final phase of the drying experiment at 142 hours, the simulated and measured wood surface temperatures from the beginning of drying to a point at 60 hours into the process, and the simulated wood stresses when compared with the maximum values for the electrical surface-core ratio (ESCR) graph, as determined by the experiment. It was found that the DC's numerical value decreases sharply by about 1.5 times after transitioning from the first drying phase to the second drying phase.","PeriodicalId":35353,"journal":{"name":"Forestry Studies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84183157","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}

引用次数: 0

Composition of live, dead and downed trees in Järvselja old-growth forest Järvselja原生林中活的、死的和倒下的树的组成

Forestry Studies Pub Date : 2021-12-01 DOI: 10.2478/fsmu-2021-0009

A. Kangur, Kristi Nigul, A. Padari, A. Kiviste, H. Korjus, D. Laarmann, Eneli Põldveer, R. Mitt, L. Frelich, K. Jõgiste, John A. Stanturf, T. Paluots, Vivika Kängsepp, H. Jürgenson, S. Noe, A. Sims, Marek Metslaid

{"title":"Composition of live, dead and downed trees in Järvselja old-growth forest","authors":"A. Kangur, Kristi Nigul, A. Padari, A. Kiviste, H. Korjus, D. Laarmann, Eneli Põldveer, R. Mitt, L. Frelich, K. Jõgiste, John A. Stanturf, T. Paluots, Vivika Kängsepp, H. Jürgenson, S. Noe, A. Sims, Marek Metslaid","doi":"10.2478/fsmu-2021-0009","DOIUrl":"https://doi.org/10.2478/fsmu-2021-0009","url":null,"abstract":"Abstract The study area is in the Järvselja Training and Experimental Forest Centre, Estonia. The conservation of Järvselja old-growth forest started in 1924 when the area was excluded from all management activities and left to natural development. The aim of this study is to analyse the methods for calculating single tree height, tree stem lateral surface area, tree volume and carbon content for standing live trees, standing dead trees and for downed deadwood in old-growth forests. The study used the data of 6205 live trees, 1119 snags, 270 standing dead trees and 2983 deadwood trunks from the measured area. The most abundant tree species in Järvselja old-growth forest were Norway spruce and linden. During the last hundred years, the number of dominating tree species has increased slightly. The standing volume of birch, common aspen and Scots pine have been declining while for linden and black alder it has been increasing. In the comparison of tree height curves, the best results were obtained with the Näslund function, however, the Chapman-Richards function with fitting showed slightly better results for two tree species.","PeriodicalId":35353,"journal":{"name":"Forestry Studies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83415206","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}

引用次数: 0

Remote-sensing support for the Estonian National Forest Inventory, facilitating the construction of maps for forest height, standing-wood volume, and tree species composition 为爱沙尼亚国家森林清查提供遥感支助，促进编制森林高度、立木量和树种组成地图

Forestry Studies Pub Date : 2020-12-01 DOI: 10.2478/fsmu-2020-0016

Mait Lang, A. Sims, K. Pärna, R. Kangro, M. Möls, Marta Mõistus, A. Kiviste, Mati Tee, Toivo Vajakas, Mattias Rennel

引用次数: 3

Decline of Fraxinus excelsior L. in parks of Saint Petersburg: Who is to blame – Hymenoscyphus fraxineus or Diplodia spp.? 圣彼得堡公园黄曲霉数量的减少:是谁的错——黄膜隐虫还是双头虫?

Forestry Studies Pub Date : 2020-12-01 DOI: 10.2478/fsmu-2020-0013

D. Shabunin, A. Selikhovkin, E. Y. Varentsova, D. Musolin

{"title":"Decline of Fraxinus excelsior L. in parks of Saint Petersburg: Who is to blame – Hymenoscyphus fraxineus or Diplodia spp.?","authors":"D. Shabunin, A. Selikhovkin, E. Y. Varentsova, D. Musolin","doi":"10.2478/fsmu-2020-0013","DOIUrl":"https://doi.org/10.2478/fsmu-2020-0013","url":null,"abstract":"Abstract The weakening and decline of European ash Fraxinus excelsior L. and other ash species have been recorded at different locations in the suburbs of Saint Petersburg, Russia. During the summer of 2019 and spring of 2020, samples from leaves, petioles, and shoots were collected from the weakened and declining ash trees in three parks in Pushkin and Gatchina and maintained in humid chambers to induce the fructification of fungi. In total, 30 taxa of micromycetes belonging to 23 genera were identified using methods of light microscopy. Hymenoscyphus fraxineus, a putative agent of ash dieback, was not recorded in the samples collected in the crowns of trees, but only on the petioles of the fallen leaves in spring. Out of all the micromycetes recorded, only coelomycetes from the genus Diplodia Fr. (in particular, D. mutila) can damage the branches of ash trees and, thus, be considered pathogenic. It is likely that H. fraxineus opens “the entry of infection” and Diplodia spp. cause the major weakening and decline of branches. The data obtained can significantly change our understanding of the causes of ash dieback and possible methods of ash stand preservation. The reason for the low pathogenicity and activity of H. fraxineus, as well as the possible role of ascomycetes Diplodia spp. in the dieback of ash stands requires further research.","PeriodicalId":35353,"journal":{"name":"Forestry Studies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86219064","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}

引用次数: 1

Harvendusraietel toimunud metsaõigusnormide rikkumise juhtumite hindamine

Forestry Studies Pub Date : 2020-12-01 DOI: 10.2478/fsmu-2020-0021

Henn Korjus, Mihkel Mets, Ahto Kangur

引用次数: 0

Potential of ecological modelling and smart-drainage development for mitigating adverse effects of future global change-type droughts for the Estonian forest sector 生态模拟和智能排水发展对减轻未来全球变化型干旱对爱沙尼亚森林部门的不利影响的潜力

Forestry Studies Pub Date : 2020-12-01 DOI: 10.2478/fsmu-2020-0017

Jan-Peter George, Mait Lang, M. Hordo, Sandra Metslaid, P. Post, T. Tamm

{"title":"Potential of ecological modelling and smart-drainage development for mitigating adverse effects of future global change-type droughts for the Estonian forest sector","authors":"Jan-Peter George, Mait Lang, M. Hordo, Sandra Metslaid, P. Post, T. Tamm","doi":"10.2478/fsmu-2020-0017","DOIUrl":"https://doi.org/10.2478/fsmu-2020-0017","url":null,"abstract":"Abstract Global change-type droughts will become more frequent in the future and threaten forest ecosystems around the globe. A large proportion of the Estonian forest sector is currently subject to artificial drainage, which could probably lead to negative feedbacks when water supply falls short because of high temperatures and low precipitation during future drought periods. In this short article, we propose a novel research perspective that could make use of already gathered data resources, such as remote sensing, climate data, tree-ring research, soil information and hydrological modelling. We conclude that, when applied in concert, such an assembled dataset has the potential to contribute to mitigation of negative climate change consequences for the Estonian forest sector. In particular, smart-drainage systems are currently a rare phenomenon in forestry, although their implementation into existing drainage systems could help maintain the critical soil water content during periods of drought, while properly fulfilling their main task of removing excess water during wet phases. We discuss this new research perspective in light of the current frame conditions of the Estonian forest sector and resolve some current lacks in knowledge and data resources which could help improve the concept in the future.","PeriodicalId":35353,"journal":{"name":"Forestry Studies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73624768","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}

引用次数: 1

About the history of conflicts over urban forestry in Estonian towns 关于爱沙尼亚城镇城市森林冲突的历史

Forestry Studies Pub Date : 2020-12-01 DOI: 10.2478/fsmu-2020-0011

H. Sander, T. Meikar

引用次数: 1

Microsatellite analysis of genetic diversity in Czech populations of European beech (Fagus sylvatica L.) 欧洲山毛榉捷克居群遗传多样性的微卫星分析

Forestry Studies Pub Date : 2020-12-01 DOI: 10.2478/fsmu-2020-0015

Dagmar Zádrapová, J. Korecký, J. Dvorák, Zuzana Faltinová, J. Bílý

{"title":"Microsatellite analysis of genetic diversity in Czech populations of European beech (Fagus sylvatica L.)","authors":"Dagmar Zádrapová, J. Korecký, J. Dvorák, Zuzana Faltinová, J. Bílý","doi":"10.2478/fsmu-2020-0015","DOIUrl":"https://doi.org/10.2478/fsmu-2020-0015","url":null,"abstract":"Abstract European beech (Fagus sylvatica L.) is one of the most important broadleaved tree species in Europe both ecologically and economically. Nowadays, in the Czech Republic, beech is underrepresented in forest tree species composition, and there are tendencies to increase its proportion. When reintroducing beech, genetic variability, along with other factors, play a key role. The main aim of this study was to evaluate the genetic diversity of ten selected indigenous beech populations across the Czech Republic. Two hundred and fifty individuals were genotyped on 21 polymorphic nuclear microsatellite markers, which were amplified using two newly assembled multiplexes. According to the results, observed heterozygosity (Ho) among populations ranged from 0.595 to 0.654 and expected heterozygosity (He) from 0.650 to 0.678. That is comparable with the findings in other European studies. The high discriminatory power of the assembled multiplexes was confirmed by calculating the Probability of Identity among both unrelated and related individuals. Principal Coordinate Analysis (PCoA) based on Nei's genetic distances revealed that there are genetic differences among populations resulting in three approximate clusters (geographically north, south-east, and south-west). Nevertheless, the results implicate that on a geographical scale of the Czech Republic, the distance is unlikely to be the primary driver of genetic differentiation.","PeriodicalId":35353,"journal":{"name":"Forestry Studies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75985480","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}

引用次数: 1

An indirect approach to predict deadwood biomass in forests of Ukrainian Polissya using Landsat images and terrestrial data 利用陆地卫星图像和陆地数据间接预测乌克兰波利西亚森林枯木生物量的方法

Forestry Studies Pub Date : 2020-12-01 DOI: 10.2478/fsmu-2020-0018

M. Matsala, V. Myroniuk, A. Bilous, A. Terentiev, P. Diachuk, R. Zadorozhniuk

{"title":"An indirect approach to predict deadwood biomass in forests of Ukrainian Polissya using Landsat images and terrestrial data","authors":"M. Matsala, V. Myroniuk, A. Bilous, A. Terentiev, P. Diachuk, R. Zadorozhniuk","doi":"10.2478/fsmu-2020-0018","DOIUrl":"https://doi.org/10.2478/fsmu-2020-0018","url":null,"abstract":"Abstract Spatially explicit and consistent mapping of forest biomass is one of the key tasks towards full and appropriate accounting of carbon budgets and productivity potentials at different scales. Landsat imagery coupled with terrestrial-based data and processed using modern machine learning techniques is a suitable data source for mapping of forest components such as deadwood. Using relationships between deadwood biomass and growing stock volume, here we indirectly map this ecosystem compartment within the study area in northern Ukraine. Several machine learning techniques were applied: Random Forest (RF) for the land cover and tree species classification task, k-Nearest Neighbours (k-NN) and Gradient Boosting Machines (GBM) for the deadwood imputation purpose. Land cover (81.9%) and tree species classification (78.9%) were performed with a relatively high level of overall accuracy. Outputs of deadwood biomass mapping using k-NN and GBM matched quite well (8.4 ± 2.3 t·ha−1 (17% of the mean) vs. 8.1 ± 1.7 t·ha−1 (16% of the mean), respectively mean ± SD deadwood biomass stock), indicating a strong potential of ensemble boosters to predict forest biomass in a spatially explicit manner. The main challenges met in the study were related to the limitations of available ground-based data, thus showing the need for national statistical inventory implications in Ukraine.","PeriodicalId":35353,"journal":{"name":"Forestry Studies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79106129","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}

引用次数: 3