Pub Date : 2024-01-09DOI: 10.5424/fs/2024331-20585
K. U. Kamlun, M. Phua
Aim of study: To study the anthropogenic factors that influence the fire occurrences in a peat swamp forest (PSF) in the northern part of Borneo Island. Area of study: Klias Peninsula, Sabah Borneo Island, Malaysia. Material and methods: Supervised classification using the maximum likelihood algorithm of multitemporal satellite imageries from the mid-80s to the early 20s was used to quantify the wetland vegetation change on Klias Peninsula. GIS-based buffering analysis was made to generate three buffer zones with distances of 1000 m, 2000 m, and 3000 m based on each of three anthropogenic factors (settlement, agriculture, and road) that influence the fire events. Main results: The results showed that PSF, barren land, and grassland have significantly changed between 1991 and 2013. PSF plummeted by about 70% during the 19-year period. Agriculture exhibited the most significant anthropogenic factor that contributes to the deforestation of the PSF in this study area with the distance of 1001-2000 m in 1998 fire event and 0-1000 m in 2003. Additionally, the distance to settlement played an increasingly important role in the fire affected areas, as shown by the increase of weightages from 0.26 to 0.35. Research highlights: Our results indicate that agriculture is the most influential anthropogenic factor associated with the fire-affected areas. The distance to settlement played an increasingly important role in the fire affected areas and contributes to the deforestation of the PSF in these study areas.
{"title":"Anthropogenic influences on deforestation of a peat swamp forest in Northern Borneo using remote sensing and GIS","authors":"K. U. Kamlun, M. Phua","doi":"10.5424/fs/2024331-20585","DOIUrl":"https://doi.org/10.5424/fs/2024331-20585","url":null,"abstract":"Aim of study: To study the anthropogenic factors that influence the fire occurrences in a peat swamp forest (PSF) in the northern part of Borneo Island. \u0000Area of study: Klias Peninsula, Sabah Borneo Island, Malaysia. \u0000Material and methods: Supervised classification using the maximum likelihood algorithm of multitemporal satellite imageries from the mid-80s to the early 20s was used to quantify the wetland vegetation change on Klias Peninsula. GIS-based buffering analysis was made to generate three buffer zones with distances of 1000 m, 2000 m, and 3000 m based on each of three anthropogenic factors (settlement, agriculture, and road) that influence the fire events. \u0000Main results: The results showed that PSF, barren land, and grassland have significantly changed between 1991 and 2013. PSF plummeted by about 70% during the 19-year period. Agriculture exhibited the most significant anthropogenic factor that contributes to the deforestation of the PSF in this study area with the distance of 1001-2000 m in 1998 fire event and 0-1000 m in 2003. Additionally, the distance to settlement played an increasingly important role in the fire affected areas, as shown by the increase of weightages from 0.26 to 0.35. \u0000Research highlights: Our results indicate that agriculture is the most influential anthropogenic factor associated with the fire-affected areas. The distance to settlement played an increasingly important role in the fire affected areas and contributes to the deforestation of the PSF in these study areas.","PeriodicalId":50434,"journal":{"name":"Forest Systems","volume":"4 8","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139443872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-21DOI: 10.5424/fs/2024331-20587
María C. Soldati, Gregorio Gavier-Pizarro, Matías Morales, María F. Pomponio, N. Zelener
Aim of study: To examine the transferability of G-SSR (genomic simple sequence repeats) and EST-SSR (expressed sequence tag simple sequence repeats) markers developed for several Neltuma species to N. affinis, a species with no genomic data. Area of study: West-Center of Entre Ríos province, Argentina. The set of molecular markers here proposed can be used to analyze samples from the entire species’ distribution range. Material and methods: Twenty-five genomic G-SSRs and eleven EST-SSRs from multiple species were amplified in thirty N. affinis genotypes. Polymorphism, discrimination power and possible deviations from Hardy-Weinberg equilibrium were assessed. Main results: Seventeen highly polymorphic G-SSRs were successfully transferred to N. affinis, with a PIC (polymorphic information content) average value of 0.811 and a He (expected heterozygosity) average value of 0.694; thirteen were validated, showing very low frequencies of null alleles and no linkage disequilibrium. Additionally, seven polymorphic EST-SSRs were transferred. As expected, PIC and He average values were low. Six out of seven markers were validated, and very low frequencies of null alleles and no linkage disequilibrium were observed. Research highlights: This work provides information on the levels of microsatellites’ cross transferability to N. affinis, and its polymorphism degree. Two sets of polymorphic SSRs (genomic and expressed) to study the genetic status of the species are proposed.
研究目的研究针对几个 Neltuma 物种开发的 G-SSR（基因组简单序列重复）和 EST-SSR（表达序列标签简单序列重复）标记对 N. affinis（一种没有基因组数据的物种）的可移植性。研究区域：阿根廷恩特雷里奥斯省西部中心。这里提出的一套分子标记可用于分析整个物种分布区的样本。材料与方法：在 30 个 N. affinis 基因型中扩增了来自多个物种的 25 个基因组 G-SSR 和 11 个 EST-SSR。评估了多态性、鉴别力和可能偏离哈代-温伯格平衡的情况。主要结果：成功将 17 个高多态性 G-SSRs 移植到 N. affinis，其 PIC（多态性信息含量）平均值为 0.811，He（预期杂合度）平均值为 0.694；其中 13 个得到验证，显示出极低的空等位基因频率和无连锁不平衡。此外，还转入了 7 个多态 EST-SSR。不出所料，PIC 和 He 平均值较低。7 个标记中有 6 个得到验证，观察到极低的空等位基因频率和无连锁不平衡。研究亮点：该研究提供了微卫星与胭脂鱼杂交转移性水平及其多态性程度的信息。提出了两组多态性 SSR（基因组和表达）来研究该物种的遗传状况。
{"title":"Cross species transferability of G-SSR and EST-SSR markers to Neltuma affinis Spreng.","authors":"María C. Soldati, Gregorio Gavier-Pizarro, Matías Morales, María F. Pomponio, N. Zelener","doi":"10.5424/fs/2024331-20587","DOIUrl":"https://doi.org/10.5424/fs/2024331-20587","url":null,"abstract":"Aim of study: To examine the transferability of G-SSR (genomic simple sequence repeats) and EST-SSR (expressed sequence tag simple sequence repeats) markers developed for several Neltuma species to N. affinis, a species with no genomic data. \u0000Area of study: West-Center of Entre Ríos province, Argentina. The set of molecular markers here proposed can be used to analyze samples from the entire species’ distribution range. \u0000Material and methods: Twenty-five genomic G-SSRs and eleven EST-SSRs from multiple species were amplified in thirty N. affinis genotypes. Polymorphism, discrimination power and possible deviations from Hardy-Weinberg equilibrium were assessed. \u0000Main results: Seventeen highly polymorphic G-SSRs were successfully transferred to N. affinis, with a PIC (polymorphic information content) average value of 0.811 and a He (expected heterozygosity) average value of 0.694; thirteen were validated, showing very low frequencies of null alleles and no linkage disequilibrium. Additionally, seven polymorphic EST-SSRs were transferred. As expected, PIC and He average values were low. Six out of seven markers were validated, and very low frequencies of null alleles and no linkage disequilibrium were observed. \u0000Research highlights: This work provides information on the levels of microsatellites’ cross transferability to N. affinis, and its polymorphism degree. Two sets of polymorphic SSRs (genomic and expressed) to study the genetic status of the species are proposed.","PeriodicalId":50434,"journal":{"name":"Forest Systems","volume":"9 6","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138948615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-31DOI: 10.5424/fs/2023323-20625
Arancha GÓMEZ-GARAY, Jose A. MANZANERA, Raquel DEL CAMPO, Beatriz PINTOS
Aim of study: This study aimed to investigate the biocontrol potential of Bacillus amyloliquefaciens against Phytophthora cinnamomi infection in Quercus suber (cork oak). Both in vitro and in planta experiments were conducted to assess the effectiveness of B. amyloliquefaciens as a biocontrol agent.
Area of study: The microorganism strains, B. amyloliquefaciens and P. cinnamomi, as well as the embryogenic lines of Q. suber used, have a Spanish origin.
Material and methods: In vitro experiments involved evaluating the inhibitory effects of B. amyloliquefaciens on P. cinnamomi growth through dual-inoculated agar plates. In planta, dual inoculation tests were performed by co-inoculating plantlets with both P. cinnamomi and B. amyloliquefaciens. Physiological parameters, such as photosynthetic activity, chlorophyll content, and oxidative stress markers, were measured. All experiments were conducted under controlled conditions.
Main results: In vitro experiments revealed the inhibitory effects of B. amyloliquefaciens on P. cinnamomi growth. Infected plantlets displayed symptoms of root infection. Dual inoculation tests resulted in plant survival against P. cinnamomi infection. Analysis of physiological parameters indicated variations among treatments and clones, highlighting the distinct response of Q. suber plantlets to the pathogen and underscoring the importance of genetic variability for disease management.
Research highlights: This study provides insights into the potential of a strain of B. amyloliquefaciens as a biocontrol agent against P. cinnamomi infection in cork oak. Further investigations are warranted to elucidate the underlying mechanisms of susceptibility and resistance in different clones of Q. suber.
{"title":"Evaluation of Bacillus amyloliquefaciens as a biocontrol agent against oak decline disease in Quercus trees","authors":"Arancha GÓMEZ-GARAY, Jose A. MANZANERA, Raquel DEL CAMPO, Beatriz PINTOS","doi":"10.5424/fs/2023323-20625","DOIUrl":"https://doi.org/10.5424/fs/2023323-20625","url":null,"abstract":"Aim of study: This study aimed to investigate the biocontrol potential of Bacillus amyloliquefaciens against Phytophthora cinnamomi infection in Quercus suber (cork oak). Both in vitro and in planta experiments were conducted to assess the effectiveness of B. amyloliquefaciens as a biocontrol agent.
 Area of study: The microorganism strains, B. amyloliquefaciens and P. cinnamomi, as well as the embryogenic lines of Q. suber used, have a Spanish origin.
 Material and methods: In vitro experiments involved evaluating the inhibitory effects of B. amyloliquefaciens on P. cinnamomi growth through dual-inoculated agar plates. In planta, dual inoculation tests were performed by co-inoculating plantlets with both P. cinnamomi and B. amyloliquefaciens. Physiological parameters, such as photosynthetic activity, chlorophyll content, and oxidative stress markers, were measured. All experiments were conducted under controlled conditions.
 Main results: In vitro experiments revealed the inhibitory effects of B. amyloliquefaciens on P. cinnamomi growth. Infected plantlets displayed symptoms of root infection. Dual inoculation tests resulted in plant survival against P. cinnamomi infection. Analysis of physiological parameters indicated variations among treatments and clones, highlighting the distinct response of Q. suber plantlets to the pathogen and underscoring the importance of genetic variability for disease management.
 Research highlights: This study provides insights into the potential of a strain of B. amyloliquefaciens as a biocontrol agent against P. cinnamomi infection in cork oak. Further investigations are warranted to elucidate the underlying mechanisms of susceptibility and resistance in different clones of Q. suber.","PeriodicalId":50434,"journal":{"name":"Forest Systems","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135872741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-25DOI: 10.5424/fs/2023323-19614
Guadalupe SÁNCHEZ-REYES, Luis A. LARA-PÉREZ, Luis SÁENZ-CARBONELL, Víctor H. RODRÍGUEZ-MORELOS, Fernando CASANOVA-LUGO, Angélica NAVARRO-MARTÍNEZ, Carlos A. PUCH-HAU, Iván OROS-ORTEGA
Aim of study: (i) To investigate the diversity of arbuscular mycorrhizal fungi (AMF) associated with the roots of seed trees stands in a conserved and natural population of mahogany (Swietenia macrophylla), based on rDNA sequences; and (ii) to evaluate the dual colonization by AMF and dark septate fungi (DSF), showing the types of fungal colonization patterns in the dry season.
Area of study: Tropical rainforest of Ejido Laguna Om, Quintana Roo, Mexico.
Material and methods: We evaluated the AMF and DSF colonization in secondary root segments of ten adult trees of mahogany. We analysed the diversity of AMF in one composite sample of mahogany roots (three trees) using 18S rDNA gene with Illumina MiSeq platform.
Main results: Through metabarcoding 14 virtual taxa belonging mainly to the genus Glomus and Diversispore were obtained, VTX00186 being the most abundant. The percentages of colonization for the different fungal structures were hyphae 80%, vesicles 18%, coils 2%, and arbuscules 0.5%; for DSF, 60% hyphae and 12% microsclerotia. The Paris-type colonization predominated with 61% in the roots.
Research highlights: The knowledge of the AMF diversity present in natural mahogany forests will allow the selection of species for inoculation management seeking to enhance seedling survival and growth of this species.
{"title":"Fungal diversity and colonization in roots seed trees of Swietenia macrophylla (Magnoliophyta: Meliaceae) in the tropical rainforest of Laguna Om, Quintana Roo, Mexico","authors":"Guadalupe SÁNCHEZ-REYES, Luis A. LARA-PÉREZ, Luis SÁENZ-CARBONELL, Víctor H. RODRÍGUEZ-MORELOS, Fernando CASANOVA-LUGO, Angélica NAVARRO-MARTÍNEZ, Carlos A. PUCH-HAU, Iván OROS-ORTEGA","doi":"10.5424/fs/2023323-19614","DOIUrl":"https://doi.org/10.5424/fs/2023323-19614","url":null,"abstract":"Aim of study: (i) To investigate the diversity of arbuscular mycorrhizal fungi (AMF) associated with the roots of seed trees stands in a conserved and natural population of mahogany (Swietenia macrophylla), based on rDNA sequences; and (ii) to evaluate the dual colonization by AMF and dark septate fungi (DSF), showing the types of fungal colonization patterns in the dry season.
 Area of study: Tropical rainforest of Ejido Laguna Om, Quintana Roo, Mexico.
 Material and methods: We evaluated the AMF and DSF colonization in secondary root segments of ten adult trees of mahogany. We analysed the diversity of AMF in one composite sample of mahogany roots (three trees) using 18S rDNA gene with Illumina MiSeq platform.
 Main results: Through metabarcoding 14 virtual taxa belonging mainly to the genus Glomus and Diversispore were obtained, VTX00186 being the most abundant. The percentages of colonization for the different fungal structures were hyphae 80%, vesicles 18%, coils 2%, and arbuscules 0.5%; for DSF, 60% hyphae and 12% microsclerotia. The Paris-type colonization predominated with 61% in the roots.
 Research highlights: The knowledge of the AMF diversity present in natural mahogany forests will allow the selection of species for inoculation management seeking to enhance seedling survival and growth of this species.","PeriodicalId":50434,"journal":{"name":"Forest Systems","volume":"51 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135217383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-23DOI: 10.5424/fs/2023323-20222
Iací D. SANTOS-BRASIL, Ana P. DALLA-CORTE, Carlos R. SANQUETTA, Nelson YOSHIHIRO-NAKAJIMA, Marks MELO-MOURA, Carla T. PERTILLE
Aim of study: This study evaluates the potential of the Google Earth Engine tool, supported by fine-scale information obtained by Unmanned Aerial Vehicle, to apply and characterize the dynamics of the successional stages of the Amazon Forest in the state of Rondônia over ten years.
Area of study: The study was carried out in the state of Rondônia located in the North Region of Brazil (Western Amazon).
Material and methods: The data and its by-products were derived from the Landsat Level 1 - TOA collection of the United States Geological Survey, specifically Landsat 5 and 8. The mapping also used Phantom 4 Pro UAV images. We used the supervised classifier Random Forest to map the primary forest/advanced regeneration, medium regeneration, initial regeneration, and classes, and, subsequently, we crossed and quantified the successional advance and vegetation loss.
Main results: It was observed that the state lost forest area even with the successional advance that occurred throughout the period, implying that the forest succession was insufficient in the face of forest deforestation.
Research highlights: This study contributed to understanding the dynamics of the Amazon Forest, which goes through a process of deforestation and forest regeneration simultaneously.
{"title":"Characterization of the dynamics of the successional stages of the Amazon forest using Google Earth Engine","authors":"Iací D. SANTOS-BRASIL, Ana P. DALLA-CORTE, Carlos R. SANQUETTA, Nelson YOSHIHIRO-NAKAJIMA, Marks MELO-MOURA, Carla T. PERTILLE","doi":"10.5424/fs/2023323-20222","DOIUrl":"https://doi.org/10.5424/fs/2023323-20222","url":null,"abstract":"Aim of study: This study evaluates the potential of the Google Earth Engine tool, supported by fine-scale information obtained by Unmanned Aerial Vehicle, to apply and characterize the dynamics of the successional stages of the Amazon Forest in the state of Rondônia over ten years.
 Area of study: The study was carried out in the state of Rondônia located in the North Region of Brazil (Western Amazon).
 Material and methods: The data and its by-products were derived from the Landsat Level 1 - TOA collection of the United States Geological Survey, specifically Landsat 5 and 8. The mapping also used Phantom 4 Pro UAV images. We used the supervised classifier Random Forest to map the primary forest/advanced regeneration, medium regeneration, initial regeneration, and classes, and, subsequently, we crossed and quantified the successional advance and vegetation loss.
 Main results: It was observed that the state lost forest area even with the successional advance that occurred throughout the period, implying that the forest succession was insufficient in the face of forest deforestation.
 Research highlights: This study contributed to understanding the dynamics of the Amazon Forest, which goes through a process of deforestation and forest regeneration simultaneously.","PeriodicalId":50434,"journal":{"name":"Forest Systems","volume":"40 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135412109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-23DOI: 10.5424/fs/2023323-20265
Mojegan KOWSARI, Ebrahim KARIMI
Oak decline as a complex syndrome is one of the most relevant forest diseases worldwide. This disease has a complex and multifactorial nature, and this has caused conventional methods in plant pathology not to provide researchers with a correct and comprehensive analysis of oak decline. This issue entails the need for a multidisciplinary approach in examining and evaluating the disease, which will provide researchers with a more exhaustive understanding of the disease. The present review examines the concept of decline, the factors that contribute to the occurrence and development of the disease, its global distribution, and indexes used in the assessment of the disease. Furthermore, it draws attention to various research approaches that have been utilized to investigate oak decline.
{"title":"A review on oak decline: The global situation, causative factors, and new research approaches","authors":"Mojegan KOWSARI, Ebrahim KARIMI","doi":"10.5424/fs/2023323-20265","DOIUrl":"https://doi.org/10.5424/fs/2023323-20265","url":null,"abstract":"Oak decline as a complex syndrome is one of the most relevant forest diseases worldwide. This disease has a complex and multifactorial nature, and this has caused conventional methods in plant pathology not to provide researchers with a correct and comprehensive analysis of oak decline. This issue entails the need for a multidisciplinary approach in examining and evaluating the disease, which will provide researchers with a more exhaustive understanding of the disease. The present review examines the concept of decline, the factors that contribute to the occurrence and development of the disease, its global distribution, and indexes used in the assessment of the disease. Furthermore, it draws attention to various research approaches that have been utilized to investigate oak decline.","PeriodicalId":50434,"journal":{"name":"Forest Systems","volume":"45 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135414529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-28DOI: 10.5424/fs/2023323-20130
Abdurrahman Sahin, İlker Ercanli
Aim of study: To assess the capabilities of some infrequently used probability density functions (PDFs) in modeling stand diameter distributions and compare their performance to that of typical PDFs. Area of study: The research was conducted in pure and mixed stands located in the OF Planning Unit of the Trabzon Forest Regional Directorate in Northern Türkiye. Material and methods: A set of 17,324 DBH measurements, originating from 608 sample plots located in stands of even-aged and pure and mixed stands, were obtained to represent various stand conditions such as site quality, age, and stand density in OF planning unit forests. In order to ensure a minimum of 30-40 trees in each sample plot, the plot sizes ranged from 0.04 to 0.08 hectares, depending on stand density. The parameters of PDFs include Weibull with 3P and 2P, Rice, Rayleigh, Normal, Nagakami, Lognormal with 2P and 3P, Lévy with 1p and 2P, Laplace, Kumaraswamy, Johnson’s SB, and Gamma were estimated using the maximum likelihood estimation (MLE) prediction procedure. Additionally, the goodness of fit test was combined with the Kolmogorov-Smirnov test (statistically at a 95% confidence interval). Main results: The Rayleigh distribution was the model that best explained the diameter distributions of pure and mixed forests in the OF Planning Unit (as Fit Index (FI) = 0.6743 and acceptance rate 96.4% based on the result of one sample Kolmogorov-Smirnov test). Research highlights: Less commonly used PDFs such as Rice, Nakagami, and Kumaraswamy-4P demonstrated superior predictive performance compared to some traditional distributions widely used in forestry, including Weibull-2P and -3P, Johnson’s SB, Normal, Gamma-3P, and Lognormal-3P.
{"title":"An evaluation of various probability density functions for predicting diameter distributions in pure and mixed-species stands in Türkiye","authors":"Abdurrahman Sahin, İlker Ercanli","doi":"10.5424/fs/2023323-20130","DOIUrl":"https://doi.org/10.5424/fs/2023323-20130","url":null,"abstract":"Aim of study: To assess the capabilities of some infrequently used probability density functions (PDFs) in modeling stand diameter distributions and compare their performance to that of typical PDFs. \u0000Area of study: The research was conducted in pure and mixed stands located in the OF Planning Unit of the Trabzon Forest Regional Directorate in Northern Türkiye. \u0000Material and methods: A set of 17,324 DBH measurements, originating from 608 sample plots located in stands of even-aged and pure and mixed stands, were obtained to represent various stand conditions such as site quality, age, and stand density in OF planning unit forests. In order to ensure a minimum of 30-40 trees in each sample plot, the plot sizes ranged from 0.04 to 0.08 hectares, depending on stand density. The parameters of PDFs include Weibull with 3P and 2P, Rice, Rayleigh, Normal, Nagakami, Lognormal with 2P and 3P, Lévy with 1p and 2P, Laplace, Kumaraswamy, Johnson’s SB, and Gamma were estimated using the maximum likelihood estimation (MLE) prediction procedure. Additionally, the goodness of fit test was combined with the Kolmogorov-Smirnov test (statistically at a 95% confidence interval). \u0000Main results: The Rayleigh distribution was the model that best explained the diameter distributions of pure and mixed forests in the OF Planning Unit (as Fit Index (FI) = 0.6743 and acceptance rate 96.4% based on the result of one sample Kolmogorov-Smirnov test). \u0000Research highlights: Less commonly used PDFs such as Rice, Nakagami, and Kumaraswamy-4P demonstrated superior predictive performance compared to some traditional distributions widely used in forestry, including Weibull-2P and -3P, Johnson’s SB, Normal, Gamma-3P, and Lognormal-3P.","PeriodicalId":50434,"journal":{"name":"Forest Systems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49074934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-24DOI: 10.5424/fs/2023323-20521
J. Herrero, A. GARCÍA-SERRANO, Carlos Félez, Fernando Herrero, Alberto Machuca, Bosco Ponz, Santiago Sancho
Aim of the study: To demonstrate if a population of Pyrenean chamois Rupicapra p. pyrenaica can live at low altitudes all year long. This could enlarge dramatically its potential habitat. Area of study: A hunting ground in Sobrarbe County, Pyrenees, Spain, in 2022. Material and methods. We interviewed local hunters to find out when the presence of the subspecies in the area dates back. We performed block counts from April to December in the target area for calculating the size of the population. Main results: There was a presence of at least 15 years of the subspecies living at 600 m asl. The population was at least 18 animals, reproduces, and shows a normal demographic structure of kids, yearlings, adult females, and adult males. Research highlights: Low-altitude chamois populations living in forests could be a result of important ecological changes in high mountain pastures producing migrations to newly suitable areas as low-altitude forests. The potential habitat of the subspecies should be broadened.
{"title":"A low altitude forest dwelling Pyrenean chamois population increases the potential habitat of this subspecies","authors":"J. Herrero, A. GARCÍA-SERRANO, Carlos Félez, Fernando Herrero, Alberto Machuca, Bosco Ponz, Santiago Sancho","doi":"10.5424/fs/2023323-20521","DOIUrl":"https://doi.org/10.5424/fs/2023323-20521","url":null,"abstract":"Aim of the study: To demonstrate if a population of Pyrenean chamois Rupicapra p. pyrenaica can live at low altitudes all year long. This could enlarge dramatically its potential habitat. \u0000Area of study: A hunting ground in Sobrarbe County, Pyrenees, Spain, in 2022. \u0000Material and methods. We interviewed local hunters to find out when the presence of the subspecies in the area dates back. We performed block counts from April to December in the target area for calculating the size of the population. \u0000Main results: There was a presence of at least 15 years of the subspecies living at 600 m asl. The population was at least 18 animals, reproduces, and shows a normal demographic structure of kids, yearlings, adult females, and adult males. \u0000Research highlights: Low-altitude chamois populations living in forests could be a result of important ecological changes in high mountain pastures producing migrations to newly suitable areas as low-altitude forests. The potential habitat of the subspecies should be broadened.","PeriodicalId":50434,"journal":{"name":"Forest Systems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45911827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-10DOI: 10.5424/fs/2023322-20093
Francisco Rodríguez-Puerta, Rafael Alonso Ponce, L. M. FERNÁNDEZ-TOIRÁN, I. Lizarralde
Aim of study: An individual-tree growth system was developed for Aleppo pine (Pinus halepensis Mill.) plantations. Area of study: Aragón region (Northeast Spain). Material and methods: Two datasets were used: Second and Third Spanish National Forest Inventories (104 plots with 1,678 trees), and ad hoc permanent plots (58 plots with 1720 trees, including 36 dead trees). Individual tree growth system was based on nine models. Different combinations of yield classes, initial stocking rates, thinning parameters, rotation periods, and age at first thinning were evaluated through the three most representative scenarios: timber production; soil conservation and biodiversity enhancement. Main results: The nine models demonstrated a significant explanatory power for the data, with R2 values ranging from 0.71 to 0.99. These findings are consistent with previous research, indicating a strong goodness of fit. Additionally, yield tables were developed for the three prevalent silvicultural scenarios. To enhance usability, all models within the system were seamlessly integrated into a web-based application SIMANFOR. Research highlights: To date, Aleppo pine forest managers in Aragon could only simulate silvicultural scenarios in natural stands. This study provides a new tool for plantations.
{"title":"Individual-tree growth system for even-aged Aleppo pine plantations in Aragón, Spain","authors":"Francisco Rodríguez-Puerta, Rafael Alonso Ponce, L. M. FERNÁNDEZ-TOIRÁN, I. Lizarralde","doi":"10.5424/fs/2023322-20093","DOIUrl":"https://doi.org/10.5424/fs/2023322-20093","url":null,"abstract":"Aim of study: An individual-tree growth system was developed for Aleppo pine (Pinus halepensis Mill.) plantations. \u0000Area of study: Aragón region (Northeast Spain). \u0000Material and methods: Two datasets were used: Second and Third Spanish National Forest Inventories (104 plots with 1,678 trees), and ad hoc permanent plots (58 plots with 1720 trees, including 36 dead trees). Individual tree growth system was based on nine models. Different combinations of yield classes, initial stocking rates, thinning parameters, rotation periods, and age at first thinning were evaluated through the three most representative scenarios: timber production; soil conservation and biodiversity enhancement. \u0000Main results: The nine models demonstrated a significant explanatory power for the data, with R2 values ranging from 0.71 to 0.99. These findings are consistent with previous research, indicating a strong goodness of fit. Additionally, yield tables were developed for the three prevalent silvicultural scenarios. To enhance usability, all models within the system were seamlessly integrated into a web-based application SIMANFOR. \u0000Research highlights: To date, Aleppo pine forest managers in Aragon could only simulate silvicultural scenarios in natural stands. This study provides a new tool for plantations.","PeriodicalId":50434,"journal":{"name":"Forest Systems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44488035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-06DOI: 10.5424/fs/2023322-20348
Teng Li, Yuan Gao
Aim of study: Natural climate change is a central driver of global ecosystem and forest change. Climate change and topographical factors have had the greatest impact on different types of forests around the world. We used remote sensing technology to detect and analyze the temporal and spatial changes of forest vegetation to provide reference for regional management. Area of study: Maoershan Forest Farm, China. Material and methods: The Landsat images were preprocessed using ArcGIS and ENVI software. The normalized difference vegetation index (NDVI) was calculated to identify vegetation changes from 2000 to 2020. In addition, the vegetation fraction cover (VFC) was calculated using the pixel binary model. The driving factors and their influences on vegetation changes in this region were determined using the random forest algorithm and Pearson correlation analysis method. Main results: From 2000 to 2020, the NDVI showed an overall increasing trend. The results indicated that compared with the climatic factors, topographic factors were more important to vegetation growth in the study area. Among the topographic factors, elevation was the most important factor affecting vegetation growth and both showed a negative correlation. Among the climatic factors, relative humidity was the primary driving factor affecting vegetation growth and both showed a positive correlation. Research highlights: Accurate and timely assessment of vegetation change and its relationship to climate and topographical changes can provide very useful information for policy makers, governments and planners in formulating management policies.
{"title":"Monitoring the dynamic changes in vegetation cover and driving factors from 2000 to 2020 in the Maoershan Forest Farm region, China, using satellite remote sensing data","authors":"Teng Li, Yuan Gao","doi":"10.5424/fs/2023322-20348","DOIUrl":"https://doi.org/10.5424/fs/2023322-20348","url":null,"abstract":"Aim of study: Natural climate change is a central driver of global ecosystem and forest change. Climate change and topographical factors have had the greatest impact on different types of forests around the world. We used remote sensing technology to detect and analyze the temporal and spatial changes of forest vegetation to provide reference for regional management. \u0000Area of study: Maoershan Forest Farm, China. \u0000Material and methods: The Landsat images were preprocessed using ArcGIS and ENVI software. The normalized difference vegetation index (NDVI) was calculated to identify vegetation changes from 2000 to 2020. In addition, the vegetation fraction cover (VFC) was calculated using the pixel binary model. The driving factors and their influences on vegetation changes in this region were determined using the random forest algorithm and Pearson correlation analysis method. \u0000Main results: From 2000 to 2020, the NDVI showed an overall increasing trend. The results indicated that compared with the climatic factors, topographic factors were more important to vegetation growth in the study area. Among the topographic factors, elevation was the most important factor affecting vegetation growth and both showed a negative correlation. Among the climatic factors, relative humidity was the primary driving factor affecting vegetation growth and both showed a positive correlation. \u0000Research highlights: Accurate and timely assessment of vegetation change and its relationship to climate and topographical changes can provide very useful information for policy makers, governments and planners in formulating management policies.","PeriodicalId":50434,"journal":{"name":"Forest Systems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42131135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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