This study was embarked upon to assess forest guards’ Knowledge, Attitude and Practice (KAP) behavioural change sequences in Nigeria lowland forest reserves using a structural equation modelling approach. Two research questions were raised and corresponding hypotheses were tested. From the data analysed, it was revealed that both knowledge and attitude variables significantly predicted the behaviour of the forest guards’ towards the management of the forest and its resources. Although the attitude variable on its own did not significantly predict the forest guards’ behaviours (t = 1.401, P > 0.05), it can be stated that the knowledge of the forest guards towards the forest is a better predictor to their environmental behaviours and their behavioural change sequence (AKP) is inclined towards developing affinity to the forest. Hence seminar and symposiums should be organized for all forest guards with the objectives of having better efforts and persistence, preparation for action, better visualization of success, reduce stressors, and fewer intrusive negative thoughts in managing the forest and its resources. This will help boost their affinity to the forest and self-efficacy as the study revealed that the Attitude-Knowledge-Practice (AKP) sequence explains better the behaviour of the forest guards in protecting the forest reserves.
本研究开始使用结构方程建模方法评估尼日利亚低地森林保护区森林警卫的知识、态度和实践(KAP)行为变化序列。提出了两个研究问题，并对相应的假设进行了检验。从分析的数据来看，知识和态度变量都显著地预测了护林员对森林及其资源管理的行为。虽然态度变量本身不能显著预测林警行为(t = 1.401, P > 0.05)，但可以认为，林警对森林的认知能较好地预测其环境行为，其行为改变序列(AKP)倾向于发展对森林的亲和力。因此，应为所有护林员组织讨论会和专题讨论会，目的是在管理森林及其资源方面有更好的努力和毅力，为行动做准备，更好地想象成功，减少压力因素，减少侵入性的消极思想。这将有助于提高他们对森林的亲和力和自我效能，因为研究表明，态度-知识-实践(AKP)序列更好地解释了森林警卫在保护森林保护区时的行为。
{"title":"Understanding psychological factors influencing ecosystem conservation behaviours of forest professionals","authors":"N. Erhabor","doi":"10.17221/39/2022-jfs","DOIUrl":"https://doi.org/10.17221/39/2022-jfs","url":null,"abstract":"This study was embarked upon to assess forest guards’ Knowledge, Attitude and Practice (KAP) behavioural change sequences in Nigeria lowland forest reserves using a structural equation modelling approach. Two research questions were raised and corresponding hypotheses were tested. From the data analysed, it was revealed that both knowledge and attitude variables significantly predicted the behaviour of the forest guards’ towards the management of the forest and its resources. Although the attitude variable on its own did not significantly predict the forest guards’ behaviours (t = 1.401, P > 0.05), it can be stated that the knowledge of the forest guards towards the forest is a better predictor to their environmental behaviours and their behavioural change sequence (AKP) is inclined towards developing affinity to the forest. Hence seminar and symposiums should be organized for all forest guards with the objectives of having better efforts and persistence, preparation for action, better visualization of success, reduce stressors, and fewer intrusive negative thoughts in managing the forest and its resources. This will help boost their affinity to the forest and self-efficacy as the study revealed that the Attitude-Knowledge-Practice (AKP) sequence explains better the behaviour of the forest guards in protecting the forest reserves.","PeriodicalId":16011,"journal":{"name":"Journal of forest science","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91236043","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}
Black locust is one of the most commonly planted exotic tree species in the world. It has a crucial role in mitigating the negative effects of climate change. Its increment analyses have a key role in forest planning. Increment is added to the wood stock of the forest over and over again, and only this continuous replenishment makes the sustainable forest management possible. This study presents the results of the analysis of periodic annual increment (PAI) by diameter (dbh) and volume (v) of two differently aged black locust (Robinia pseudoacacia L.) stands, growing under similar ecological conditions. The main correlations are as follows: PAIdbh and diameter at breast height: r = 0.601 and 0.704 (P = 0.01); PAIv and mean tree volume (v): r = 0.721 and 0.849 (P = 0.01). The presented correlations clearly demonstrate the importance of individual differentiation within a stand.
{"title":"Analyses of periodic annual increment by diameter and volume in differently aged black locust (Robinia pseudoacacia L.) stands: Case study","authors":"T. Ábri, K. Rédei","doi":"10.17221/25/2022-jfs","DOIUrl":"https://doi.org/10.17221/25/2022-jfs","url":null,"abstract":"Black locust is one of the most commonly planted exotic tree species in the world. It has a crucial role in mitigating the negative effects of climate change. Its increment analyses have a key role in forest planning. Increment is added to the wood stock of the forest over and over again, and only this continuous replenishment makes the sustainable forest management possible. This study presents the results of the analysis of periodic annual increment (PAI) by diameter (dbh) and volume (v) of two differently aged black locust (Robinia pseudoacacia L.) stands, growing under similar ecological conditions. The main correlations are as follows: PAIdbh and diameter at breast height: r = 0.601 and 0.704 (P = 0.01); PAIv and mean tree volume (v): r = 0.721 and 0.849 (P = 0.01). The presented correlations clearly demonstrate the importance of individual differentiation within a stand.","PeriodicalId":16011,"journal":{"name":"Journal of forest science","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86514029","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}
It is difficult to estimate flood discharges and the flood zones as well as to design hydraulic structures in rivers without using hydrometric stations. Furthermore, using different models to determine the mentioned cases will be accompanied by errors. Therefore, flood marks on the trunks of trees located in the Babolrood riverbed were used to determine the peak discharge, flood flow depth, and flood zone in northern Iran. First, a hydraulic model for the study river was provided using topographic maps with a scale of 1: 1 000, HEC-GeoRAS extension (GIS), and HEC-RAS model. Then, the flood marks of past floods in the form of silt and clay sediments (deposits on the trees in the riverbed) were evaluated and the maximum flood flow depth was determined. Finally, the peak discharge of the past flood was estimated by the trial-and-error method to achieve the flood flow depth in the different river reaches. Then, the hydraulic model using the flow depth data was calibrated in the reaches, and, in the final step, based on the flood marks of other reaches, the model was validated. According to the results, the maximum instantaneous discharge rate of the study flood was 155 m3·s–1 and the maximum flood flow depth was about 2 m. Furthermore, the results showed that the flood mark data in forest lands can be used as a tool for the calibration and validation of hydraulic models. The present methodology is an efficient method for determining the flood peak discharge, spatial variation of the flood depth, and flood zone in forest watersheds without hydrometric stations.
{"title":"Prediction of flood discharge and flood flow depth using a hydraulic model and flood marks on the trees in ungauged forested watersheds","authors":"V. Gholami","doi":"10.17221/6/2022-jfs","DOIUrl":"https://doi.org/10.17221/6/2022-jfs","url":null,"abstract":"It is difficult to estimate flood discharges and the flood zones as well as to design hydraulic structures in rivers without using hydrometric stations. Furthermore, using different models to determine the mentioned cases will be accompanied by errors. Therefore, flood marks on the trunks of trees located in the Babolrood riverbed were used to determine the peak discharge, flood flow depth, and flood zone in northern Iran. First, a hydraulic model for the study river was provided using topographic maps with a scale of 1: 1 000, HEC-GeoRAS extension (GIS), and HEC-RAS model. Then, the flood marks of past floods in the form of silt and clay sediments (deposits on the trees in the riverbed) were evaluated and the maximum flood flow depth was determined. Finally, the peak discharge of the past flood was estimated by the trial-and-error method to achieve the flood flow depth in the different river reaches. Then, the hydraulic model using the flow depth data was calibrated in the reaches, and, in the final step, based on the flood marks of other reaches, the model was validated. According to the results, the maximum instantaneous discharge rate of the study flood was 155 m3·s–1 and the maximum flood flow depth was about 2 m. Furthermore, the results showed that the flood mark data in forest lands can be used as a tool for the calibration and validation of hydraulic models. The present methodology is an efficient method for determining the flood peak discharge, spatial variation of the flood depth, and flood zone in forest watersheds without hydrometric stations.","PeriodicalId":16011,"journal":{"name":"Journal of forest science","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74293278","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}
Calculating the factor of safety (FS) as slope stability factor is necessary to prevent environmental damage. Therefore, this paper aims to (i) calculate FS using the limit equilibrium approaches and Slide software and (ii) investigate the stability of slopes according to calculated FS (Janbu and Bishop methods) and status of different sites in the study area (Hyrcanian forest of Iran). Six landslides were selected along the forest road by a field survey. Landslide dimensions including length, width, and height were measured using meters. Slope gradients were measured using the Suunto clinometer. The Slide software was used to evaluate the stability analysis of slopes. According to laboratory tests on soil samples the average of the liquid limit was recorded as 58%. The results of the direct shear test showed that the rate of soil cohesion (c) and coefficient of friction angle (φ) decreased with an increase in moisture content. According to the results, the factors of safety for landslide sites (Sites 1–6) were calculated to be 1.3, 0.65, 0.76, 0.55, 1.19 and 1.51, respectively. These calculated FS can accurately determine the slope status in terms of slope stability. According to the software classification, the status of Site 1 is “susceptible to landside”. Sites 2, 3 and 4 are “very high risk”. Also, the status of Sites 5 and 6 are “high risk” and “stable”, respectively. The instability of the slopes in studied sites is related to the drainage system (lack of culverts or ditches) as well as marlstone as bedrock. According to the calculated FS in different sites and comparison of the obtained results with the real conditions of sites, it can be concluded that the slope stability analysis in the Slide software is very accurate and it can be used to determine the factor of safety under different conditions in terms of morphology, hydrology and soil mechanics.
{"title":"Cut slope stability assessment along forest roads using the limit equilibrium approaches and Slide software","authors":"M. Nasiri, Mojtaba Mohamadzade","doi":"10.17221/21/2022-jfs","DOIUrl":"https://doi.org/10.17221/21/2022-jfs","url":null,"abstract":"Calculating the factor of safety (FS) as slope stability factor is necessary to prevent environmental damage. Therefore, this paper aims to (i) calculate FS using the limit equilibrium approaches and Slide software and (ii) investigate the stability of slopes according to calculated FS (Janbu and Bishop methods) and status of different sites in the study area (Hyrcanian forest of Iran). Six landslides were selected along the forest road by a field survey. Landslide dimensions including length, width, and height were measured using meters. Slope gradients were measured using the Suunto clinometer. The Slide software was used to evaluate the stability analysis of slopes. According to laboratory tests on soil samples the average of the liquid limit was recorded as 58%. The results of the direct shear test showed that the rate of soil cohesion (c) and coefficient of friction angle (φ) decreased with an increase in moisture content. According to the results, the factors of safety for landslide sites (Sites 1–6) were calculated to be 1.3, 0.65, 0.76, 0.55, 1.19 and 1.51, respectively. These calculated FS can accurately determine the slope status in terms of slope stability. According to the software classification, the status of Site 1 is “susceptible to landside”. Sites 2, 3 and 4 are “very high risk”. Also, the status of Sites 5 and 6 are “high risk” and “stable”, respectively. The instability of the slopes in studied sites is related to the drainage system (lack of culverts or ditches) as well as marlstone as bedrock. According to the calculated FS in different sites and comparison of the obtained results with the real conditions of sites, it can be concluded that the slope stability analysis in the Slide software is very accurate and it can be used to determine the factor of safety under different conditions in terms of morphology, hydrology and soil mechanics.","PeriodicalId":16011,"journal":{"name":"Journal of forest science","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78221874","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}
Seedling quality is an important input affecting the outplanted seedling performance. Morphological attributes and association with symbiotic ectomycorrhizal (ECM) fungi belong to influential traits determining seedling quality. In this study, the effect of pre-sowing applied commercial additives Ectovit (containing hydrogel and ECM fungi), Mycorrhizaroots (ECM fungi and nutrients) and Vetozen (natural mineral fertilizer) on the growth and ectomycorrhiza formation of Norway spruce seedlings grown in nutrient-poor pure peat in an open nursery site was assessed. Two-year-old bareroot seedlings were transplanted into containers. No significant growth differences were detected between treatments for 1 + 0 seedlings but the values of growth parameters (root collar diameter; stem height; shoot, root and total dry weight) of Ectovit-inoculated seedlings were significantly higher than those in the other treatments including the control after the second (2 + 0 seedlings) and the third growing season (2 + 1). Root-to-shoot dry weight ratio and number of root tips were distinctly higher after the third year compared to the previous two years but they were not significantly different between treatments. Mycorrhizaroots and Vetozen did not have any significant effect on seedling development. Although the occurrence of treatment-specific ECM morphotype was detected in Ectovit-inoculated seedlings, the high total ECM colonization of roots in all treatments including the control indicated a crucial impact of naturally occurring fungi on ectomycorrhiza formation.
{"title":"Ectomycorrhiza-hydrogel additive enhanced growth of Norway spruce seedlings in a nutrient-poor peat substrate","authors":"I. Repáč, Zuzana Parobeková, Martin Belko","doi":"10.17221/29/2022-jfs","DOIUrl":"https://doi.org/10.17221/29/2022-jfs","url":null,"abstract":"Seedling quality is an important input affecting the outplanted seedling performance. Morphological attributes and association with symbiotic ectomycorrhizal (ECM) fungi belong to influential traits determining seedling quality. In this study, the effect of pre-sowing applied commercial additives Ectovit (containing hydrogel and ECM fungi), Mycorrhizaroots (ECM fungi and nutrients) and Vetozen (natural mineral fertilizer) on the growth and ectomycorrhiza formation of Norway spruce seedlings grown in nutrient-poor pure peat in an open nursery site was assessed. Two-year-old bareroot seedlings were transplanted into containers. No significant growth differences were detected between treatments for 1 + 0 seedlings but the values of growth parameters (root collar diameter; stem height; shoot, root and total dry weight) of Ectovit-inoculated seedlings were significantly higher than those in the other treatments including the control after the second (2 + 0 seedlings) and the third growing season (2 + 1). Root-to-shoot dry weight ratio and number of root tips were distinctly higher after the third year compared to the previous two years but they were not significantly different between treatments. Mycorrhizaroots and Vetozen did not have any significant effect on seedling development. Although the occurrence of treatment-specific ECM morphotype was detected in Ectovit-inoculated seedlings, the high total ECM colonization of roots in all treatments including the control indicated a crucial impact of naturally occurring fungi on ectomycorrhiza formation.","PeriodicalId":16011,"journal":{"name":"Journal of forest science","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84936143","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}
T. Tonka, Dagmar Stehlíková, L. Walterová, V. Čurn
We introduced here the first loop mediated isothermal amplification (LAMP) assay for the identification of honey fungus, Armillaria ostoyae, a basidiomycote playing an important role in spruce declines in the Palaearctic region. In total, 101 isolates, representing three Armillaria species, were used to develop a new LAMP assay to determine species specific identification. We have here described LAMP primers enhanced with fluorescent dye that are able to amplify A. ostoyae DNA and detect fungi in a fast single step reaction. The detection limit of LAMP was 1 pg of genomic DNA per reaction. We optimized a new LAMP assay for the rapid detection of A. ostoyae using the translation elongation factor 1-α (tef1) marker and fluorescence labelled oligonucleotide assimilating probe. The LAMP assay does not require any specialized equipment, hence it can be used in the field for the rapid detection of A. ostoyae even using the portable and mobile device. The specificity of the assay was confirmed by the use of A. ostoyae strains and Armillaria cepistipes and Armillaria gallica strains, respectively. In conclusion, the assay could be a rapid, specific, sensitive and low-cost tool for identification of A. ostoyae as well as the first step for expansion of this method in practical applications.
{"title":"Development of loop mediated isothermal amplification for rapid species detection of Armillaria ostoyae using assimilating probe","authors":"T. Tonka, Dagmar Stehlíková, L. Walterová, V. Čurn","doi":"10.17221/161/2021-jfs","DOIUrl":"https://doi.org/10.17221/161/2021-jfs","url":null,"abstract":"We introduced here the first loop mediated isothermal amplification (LAMP) assay for the identification of honey fungus, Armillaria ostoyae, a basidiomycote playing an important role in spruce declines in the Palaearctic region. In total, 101 isolates, representing three Armillaria species, were used to develop a new LAMP assay to determine species specific identification. We have here described LAMP primers enhanced with fluorescent dye that are able to amplify A. ostoyae DNA and detect fungi in a fast single step reaction. The detection limit of LAMP was 1 pg of genomic DNA per reaction. We optimized a new LAMP assay for the rapid detection of A. ostoyae using the translation elongation factor 1-α (tef1) marker and fluorescence labelled oligonucleotide assimilating probe. The LAMP assay does not require any specialized equipment, hence it can be used in the field for the rapid detection of A. ostoyae even using the portable and mobile device. The specificity of the assay was confirmed by the use of A. ostoyae strains and Armillaria cepistipes and Armillaria gallica strains, respectively. In conclusion, the assay could be a rapid, specific, sensitive and low-cost tool for identification of A. ostoyae as well as the first step for expansion of this method in practical applications.","PeriodicalId":16011,"journal":{"name":"Journal of forest science","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73795706","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}
Bio-based and biodegradable plastics produced from wood residues can have a positive impact on the environment by replacing conventional plastics. However, the current bioplastics market is held back by a lack of available information and weak marketing activities aimed at final consumers. To increase the available information, the present study investigated the consumers’ attitudes and behaviours towards bioplastic products. A web-based survey was conducted on a sample of potential consumers in Italy. 1 115 consumers filled out the questionnaire with a dropout rate in compilation of 14%. The results showed that the environmental characteristics of bioplastics (lower impact on climate change and renewable sources used to produce them) are considered more important by respondents than the non-environmental characteristics (technical properties, origin of raw material, potential trade-off between bioplastics and food production). The results highlighted that the most important behavioural factor is the purchase intentions, followed by control of perceived cost and subjective norm. It is interesting to emphasize that the cost of bioplastics compared to conventional plastics is a key variable in the choices of many Italian consumers. The results provided can be useful to the manufacturing industries to better understand the consumers’ attitudes towards bioplastics.
{"title":"Behaviours and attitudes of consumers towards bioplastics: An exploratory study in Italy","authors":"S. Notaro, A. Paletto, Elisabetta Lovera","doi":"10.17221/26/2022-jfs","DOIUrl":"https://doi.org/10.17221/26/2022-jfs","url":null,"abstract":"Bio-based and biodegradable plastics produced from wood residues can have a positive impact on the environment by replacing conventional plastics. However, the current bioplastics market is held back by a lack of available information and weak marketing activities aimed at final consumers. To increase the available information, the present study investigated the consumers’ attitudes and behaviours towards bioplastic products. A web-based survey was conducted on a sample of potential consumers in Italy. 1 115 consumers filled out the questionnaire with a dropout rate in compilation of 14%. The results showed that the environmental characteristics of bioplastics (lower impact on climate change and renewable sources used to produce them) are considered more important by respondents than the non-environmental characteristics (technical properties, origin of raw material, potential trade-off between bioplastics and food production). The results highlighted that the most important behavioural factor is the purchase intentions, followed by control of perceived cost and subjective norm. It is interesting to emphasize that the cost of bioplastics compared to conventional plastics is a key variable in the choices of many Italian consumers. The results provided can be useful to the manufacturing industries to better understand the consumers’ attitudes towards bioplastics.","PeriodicalId":16011,"journal":{"name":"Journal of forest science","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90384814","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}
M. Pástor, Jaroslav Jankovič, Martin Belko, J. Modranský
The main objective of this study was to assess the growth of the established Paulownia cotevisa plantation during an extended time period and compare it with values reviewed in the literature. Seven years after planting, mean diameter at breast height and height of the aboveground part of P. cotevisa 2® (P. cotevisa) plantation were similar to values reported in the literature and they reached 21.5 cm and 11.2 m, respectively. Besides the crown damage caused by wind, development of the P. cotevisa plantation established in the Danubian Lowland was not affected by any other harmful environmental factor or biological pest. The results suggest that P. cotevisa could be used to a larger extent in diversification of biomass production on abandoned arable lands of the Danubian Lowland.
{"title":"Evaluation of selected growth parameters of Paulownia cotevisa plantation in the Danubian Lowland","authors":"M. Pástor, Jaroslav Jankovič, Martin Belko, J. Modranský","doi":"10.17221/155/2021-jfs","DOIUrl":"https://doi.org/10.17221/155/2021-jfs","url":null,"abstract":"The main objective of this study was to assess the growth of the established Paulownia cotevisa plantation during an extended time period and compare it with values reviewed in the literature. Seven years after planting, mean diameter at breast height and height of the aboveground part of P. cotevisa 2® (P. cotevisa) plantation were similar to values reported in the literature and they reached 21.5 cm and 11.2 m, respectively. Besides the crown damage caused by wind, development of the P. cotevisa plantation established in the Danubian Lowland was not affected by any other harmful environmental factor or biological pest. The results suggest that P. cotevisa could be used to a larger extent in diversification of biomass production on abandoned arable lands of the Danubian Lowland.","PeriodicalId":16011,"journal":{"name":"Journal of forest science","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83506045","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}
The objective of this research is the identification of burned forest areas that occurred in Syria from September 2nd to October 15th, 2020. Forest fire risk classes were determined using Sentinel-2 images. Normalized Burn Ratio (NBR), Differenced Normalized Burn Ratio (dNBR), and Burned Area Index for Sentinel-2 (BAIS2), and Normalized Difference Vegetation Index (NDVI) were used for the identification how much the forests have been destroyed and to establish fire risk classes. According to the study results, the size of the vegetation area that was destroyed due to fire was determined, and the probability of the forest fire exposure of these areas was established. The fires also altered some chemical properties in the soil during the combustion process. Thus, this study was focused on the impact of fire on the availability of soil nutrients. Soil samples were collected from three depths (0–10 cm, 10–20 cm and 20–30 cm) under the forest land a month after the fire in three locations: Al-Fazeen, Sawda and Gard Al-rihan. Pine (Pinus brutia) trees cover these areas. The results of this study indicated that the fire increased pH, EC and sand, the fire also led to an increase in the solubility of the available major soil elements N, P and K. There was an increase in the solubility of the soil microelements Zn, Cu, Mn and Fe while the content of organic material and silt and clay ratio decreased at the three sites in comparison with unburned soil.
{"title":"Burned area determination using Sentinel-2 satellite images and the impact of fire on the availability of soil nutrients in Syria","authors":"Rukea Al-hasn, Raed Almuhammad","doi":"10.17221/122/2021-jfs","DOIUrl":"https://doi.org/10.17221/122/2021-jfs","url":null,"abstract":"The objective of this research is the identification of burned forest areas that occurred in Syria from September 2nd to October 15th, 2020. Forest fire risk classes were determined using Sentinel-2 images. Normalized Burn Ratio (NBR), Differenced Normalized Burn Ratio (dNBR), and Burned Area Index for Sentinel-2 (BAIS2), and Normalized Difference Vegetation Index (NDVI) were used for the identification how much the forests have been destroyed and to establish fire risk classes. According to the study results, the size of the vegetation area that was destroyed due to fire was determined, and the probability of the forest fire exposure of these areas was established. The fires also altered some chemical properties in the soil during the combustion process. Thus, this study was focused on the impact of fire on the availability of soil nutrients. Soil samples were collected from three depths (0–10 cm, 10–20 cm and 20–30 cm) under the forest land a month after the fire in three locations: Al-Fazeen, Sawda and Gard Al-rihan. Pine (Pinus brutia) trees cover these areas. The results of this study indicated that the fire increased pH, EC and sand, the fire also led to an increase in the solubility of the available major soil elements N, P and K. There was an increase in the solubility of the soil microelements Zn, Cu, Mn and Fe while the content of organic material and silt and clay ratio decreased at the three sites in comparison with unburned soil.","PeriodicalId":16011,"journal":{"name":"Journal of forest science","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88802773","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}
Based on the measurements of the biomass of the stems of 3 699 trees of Scots pine, Norway spruce, and silver birch in Europe since 1950, it has been shown that these tree species show a reduction in biomass and wood density. These results contradict the fact that the volume of wood is directly converted to biomass using the historical values of the conversion rates. From 1950 to 2020 the biomass of 1 m3 of the stem with bark decreased on average by 80 kg (–17%) for Scots pine, by 105 kg (–22%) for Norway spruce and by 92 kg (–15%) for silver birch. The results obtained should be taken into account when assessing the technical properties of wood and estimating carbon sequestration by forest biomass. Since decreasing trends in stem biomass have been identified for several tree species, the phenomenon may have a large degree of generality. Such studies should be continued both at the regional and national level and at the global level.
{"title":"Changes of tree stem biomass in European forests since 1950","authors":"A. Lebedev, V. Kuzmichev","doi":"10.17221/135/2021-jfs","DOIUrl":"https://doi.org/10.17221/135/2021-jfs","url":null,"abstract":"Based on the measurements of the biomass of the stems of 3 699 trees of Scots pine, Norway spruce, and silver birch in Europe since 1950, it has been shown that these tree species show a reduction in biomass and wood density. These results contradict the fact that the volume of wood is directly converted to biomass using the historical values of the conversion rates. From 1950 to 2020 the biomass of 1 m3 of the stem with bark decreased on average by 80 kg (–17%) for Scots pine, by 105 kg (–22%) for Norway spruce and by 92 kg (–15%) for silver birch. The results obtained should be taken into account when assessing the technical properties of wood and estimating carbon sequestration by forest biomass. Since decreasing trends in stem biomass have been identified for several tree species, the phenomenon may have a large degree of generality. Such studies should be continued both at the regional and national level and at the global level.","PeriodicalId":16011,"journal":{"name":"Journal of forest science","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75055939","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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