Pub Date : 2022-03-06DOI: 10.1080/10549811.2022.2045502
H. Mehta, Pawan Kumar, A. Rathore, R. Kaushal, A. Gupta
ABSTRACT The present studies were conducted to evaluate Grewia optiva clones for fodder yield and other related traits among nine different clones in lower Shivalik North Western Himalayas. The results demonstrated positive correlations between collar diameter, fresh fodder weight and fuel wood weight. Similarly, diameter at breast height was also strongly correlated with collar diameter, fresh fodder weight and fuel wood weight. Principal component analysis revealed total variability of 77.8% among genotypes contributed by PC-1 (57.3%) and PC-2 (20.5%). The compositions of clusters revealed that the Cluster I contained the highest number of genotypes followed by Cluster II, III, IV and Cluster V. The highest inter cluster values were recorded between cluster II and IV exhibiting wide genetic diversity and crossing between genotypes of these clusters may develop transgressive segregates in the segregating generations and may end up in some promising genotypes for higher fodder and fuel wood productivity. Grewia optiva clones with (C8, C1, and C4) higher fresh fodder and fuel wood productivity were identified.
{"title":"Evaluation of Grewia Optiva Clones for Fodder Yield under North Western Himalayas Conditions","authors":"H. Mehta, Pawan Kumar, A. Rathore, R. Kaushal, A. Gupta","doi":"10.1080/10549811.2022.2045502","DOIUrl":"https://doi.org/10.1080/10549811.2022.2045502","url":null,"abstract":"ABSTRACT The present studies were conducted to evaluate Grewia optiva clones for fodder yield and other related traits among nine different clones in lower Shivalik North Western Himalayas. The results demonstrated positive correlations between collar diameter, fresh fodder weight and fuel wood weight. Similarly, diameter at breast height was also strongly correlated with collar diameter, fresh fodder weight and fuel wood weight. Principal component analysis revealed total variability of 77.8% among genotypes contributed by PC-1 (57.3%) and PC-2 (20.5%). The compositions of clusters revealed that the Cluster I contained the highest number of genotypes followed by Cluster II, III, IV and Cluster V. The highest inter cluster values were recorded between cluster II and IV exhibiting wide genetic diversity and crossing between genotypes of these clusters may develop transgressive segregates in the segregating generations and may end up in some promising genotypes for higher fodder and fuel wood productivity. Grewia optiva clones with (C8, C1, and C4) higher fresh fodder and fuel wood productivity were identified.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"42 1","pages":"441 - 452"},"PeriodicalIF":1.6,"publicationDate":"2022-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47800920","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 : 2022-03-03DOI: 10.1080/10549811.2022.2048263
H. Ghazghazi, L. Riahi, Islem Yangui, C. Messaoud, T. Rzigui, Z. Nasr
ABSTRACT The characterization of the drought stress responses of plants is essential to understand the interactions of these effects with key life processes, such as growth and reproduction. The capability of plants to respond to abiotic stress is associated with their plasticity as well as the adaptableness of plant traits to fluctuating bioclimatic conditions. In this study, the response of Pinus halepensis seedlings to the different water irrigation regimes was assessed based on various ecophysiological, biochemical, and metabolic traits. This approach aims to identify different traits capable of predicting the ability of formerly uncharacterized seedlings to cope with drought stress. The obtained results revealed that drought stress affects the vital metabolic processes in Aleppo pine plants, such as transpiration, photosynthesis, and respiration at their early development stage. These variations were accompanied by changes in chlorophyll pigment contents and an accumulation of organic solutes (sugar and proline). Both drought stress levels induced an increase over the control of the amounts of total secondary metabolites and essential oil contents. These findings are of particular interest in the comprehension of seedlings response to drought stress which provides valuable background knowledge for the success of reforestation programs based on this woody species.
{"title":"Effect of Drought Stress on Physio-biochemical Traits and Secondary Metabolites Production in the Woody Species Pinus Halepensis Mill. At a Juvenile Development Stage","authors":"H. Ghazghazi, L. Riahi, Islem Yangui, C. Messaoud, T. Rzigui, Z. Nasr","doi":"10.1080/10549811.2022.2048263","DOIUrl":"https://doi.org/10.1080/10549811.2022.2048263","url":null,"abstract":"ABSTRACT The characterization of the drought stress responses of plants is essential to understand the interactions of these effects with key life processes, such as growth and reproduction. The capability of plants to respond to abiotic stress is associated with their plasticity as well as the adaptableness of plant traits to fluctuating bioclimatic conditions. In this study, the response of Pinus halepensis seedlings to the different water irrigation regimes was assessed based on various ecophysiological, biochemical, and metabolic traits. This approach aims to identify different traits capable of predicting the ability of formerly uncharacterized seedlings to cope with drought stress. The obtained results revealed that drought stress affects the vital metabolic processes in Aleppo pine plants, such as transpiration, photosynthesis, and respiration at their early development stage. These variations were accompanied by changes in chlorophyll pigment contents and an accumulation of organic solutes (sugar and proline). Both drought stress levels induced an increase over the control of the amounts of total secondary metabolites and essential oil contents. These findings are of particular interest in the comprehension of seedlings response to drought stress which provides valuable background knowledge for the success of reforestation programs based on this woody species.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"41 1","pages":"878 - 894"},"PeriodicalIF":1.6,"publicationDate":"2022-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47225492","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 : 2022-03-03DOI: 10.1080/10549811.2022.2043907
A. Ngadianto, F. Ishiguri, I. Nezu, D. Irawati, J. Ohshima, S. Yokota
ABSTRACT Boundary between core and outer wood should be clarified for tropical fast-growing tree species to utilize its wood resources under sustainable forestry. This study aimed to determine the boundary between core and outer wood based on the mixed-effects models for radial variations of anatomical characteristics and wood properties in three fast-growing tree species grown in community forests in Indonesia – Acacia mangium Willd., Maesopsis eminii Engl., and Melia azedarach L.. On the basis of the results of the radial variation modeling, almost all anatomical characteristics and wood properties were shown to increase or decrease from pith to bark and then become almost stable. The boundary values between core and outer wood based on exponential function with plateau for absolute changing ratios of estimated properties were 6.1, 6.8, and 5.5 cm for A. mangium, M. eminii, and M. azedarach, respectively. In conclusion, boundary between core and outer wood in respect to multiple characteristics and properties in tropical fast-growing tree species can be determined by combination of mixed-effects modeling and exponential function with convergence.
{"title":"Determination of Boundary between Core and Outer Wood by Radial Variation Modeling in Tropical Fast-Growing Tree Species","authors":"A. Ngadianto, F. Ishiguri, I. Nezu, D. Irawati, J. Ohshima, S. Yokota","doi":"10.1080/10549811.2022.2043907","DOIUrl":"https://doi.org/10.1080/10549811.2022.2043907","url":null,"abstract":"ABSTRACT Boundary between core and outer wood should be clarified for tropical fast-growing tree species to utilize its wood resources under sustainable forestry. This study aimed to determine the boundary between core and outer wood based on the mixed-effects models for radial variations of anatomical characteristics and wood properties in three fast-growing tree species grown in community forests in Indonesia – Acacia mangium Willd., Maesopsis eminii Engl., and Melia azedarach L.. On the basis of the results of the radial variation modeling, almost all anatomical characteristics and wood properties were shown to increase or decrease from pith to bark and then become almost stable. The boundary values between core and outer wood based on exponential function with plateau for absolute changing ratios of estimated properties were 6.1, 6.8, and 5.5 cm for A. mangium, M. eminii, and M. azedarach, respectively. In conclusion, boundary between core and outer wood in respect to multiple characteristics and properties in tropical fast-growing tree species can be determined by combination of mixed-effects modeling and exponential function with convergence.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"42 1","pages":"421 - 440"},"PeriodicalIF":1.6,"publicationDate":"2022-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44271839","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 : 2022-03-03DOI: 10.1080/10549811.2022.2045503
Angelino Pereira de Oliveira Junior, Rodolfo Aureliano Salm, Emil José Hernández-Ruz
ABSTRACT Logging is an economically important activity in the Amazon; however, there are doubts regarding its sustainability, even under planned systems. This study sought to evaluate the dynamics of the structure and composition of a forest undergoing logging operations in a Sustainable Management Unit (SMU) located in the Mamuru–Arapiuns lots of the cities of Juruti and Santarém, in the state of Pará, Brazil. The studied areas are under public concession and are closely monitored by Brazilian environmental agencies. Data were collected from permanent plots before and after logging (years 2012 to 2015). Our findings raise concerns regarding the prospects of sustainable logging because mortality rates exceeded recruitment rates, causing significant decreases in tree density per hectare and basal forest area. The diameter increment rate in the forest community was 0.82 cm year−1; crown shape and lighting significantly influenced tree diameter growth. There was initially a decrease in tree diversity followed by an increase, resulting in higher diversity levels than those observed prior to logging. There were minor changes in the composition of the forest community, with a particular shift toward pioneer species. We concluded that logging affected forest dynamics at a level that calls its prospects for sustainability into question.
{"title":"Dynamics of a Forest Submitted to Logging in the Eastern Amazon, Brazil","authors":"Angelino Pereira de Oliveira Junior, Rodolfo Aureliano Salm, Emil José Hernández-Ruz","doi":"10.1080/10549811.2022.2045503","DOIUrl":"https://doi.org/10.1080/10549811.2022.2045503","url":null,"abstract":"ABSTRACT Logging is an economically important activity in the Amazon; however, there are doubts regarding its sustainability, even under planned systems. This study sought to evaluate the dynamics of the structure and composition of a forest undergoing logging operations in a Sustainable Management Unit (SMU) located in the Mamuru–Arapiuns lots of the cities of Juruti and Santarém, in the state of Pará, Brazil. The studied areas are under public concession and are closely monitored by Brazilian environmental agencies. Data were collected from permanent plots before and after logging (years 2012 to 2015). Our findings raise concerns regarding the prospects of sustainable logging because mortality rates exceeded recruitment rates, causing significant decreases in tree density per hectare and basal forest area. The diameter increment rate in the forest community was 0.82 cm year−1; crown shape and lighting significantly influenced tree diameter growth. There was initially a decrease in tree diversity followed by an increase, resulting in higher diversity levels than those observed prior to logging. There were minor changes in the composition of the forest community, with a particular shift toward pioneer species. We concluded that logging affected forest dynamics at a level that calls its prospects for sustainability into question.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"42 1","pages":"453 - 471"},"PeriodicalIF":1.6,"publicationDate":"2022-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42824337","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 : 2022-03-03DOI: 10.1080/10549811.2022.2045504
P. Lalremsang, B. Gopichand, Kalidas Upadhaya, Lungmuana Singson, U. Sahoo
ABSTRACT Leaf litter decomposition and nutrient release dynamics of Flemingia semialata Roxb. were studied from May 2016 to April 2017 using the litter bag technique. The study on litter dynamics is needed to assess the nutrient release pattern before introduction in degraded or marginal lands or agroforestry systems for soil nutrient management practices in hilly northeast states of India. The initial N concentration, lignin content, and lignin/N ratio of leaf litter had significant positive correlations with decay coefficients. The annual decay rate constant (k) for dry matter was 0.01 day−1 (3.65 year−1) with t50 and t99 values of 96.43 and 695.73 days, respectively, indicating faster leaf litter decomposition. Initial C (51%), N (2.38%), and low lignin concentrations with low C/N (21.53) and lignin/N (4.05) ratios could be important factors in faster mass loss from the litter samples. The P mineralization k P (2.19) rate was higher than k N (0.73), indicating the slower release rate of N. The weight loss during decomposition was positively correlated with rainfall (r = 0.42) and temperature (r = 0.39). The study suggests that F. semialata leaf litter could be useful for regulating soil nutrient pool through faster litter turnover and can therefore be exploited as plantation and/or agroforestry species for soil and water conservation in degraded slopy terrain of the region.
{"title":"Leaf Litter Decomposition and Nutrient Release Dynamics of Flemingia semialata Roxb. - A Potential Woody Perennial Species for Mountain Agroforestry","authors":"P. Lalremsang, B. Gopichand, Kalidas Upadhaya, Lungmuana Singson, U. Sahoo","doi":"10.1080/10549811.2022.2045504","DOIUrl":"https://doi.org/10.1080/10549811.2022.2045504","url":null,"abstract":"ABSTRACT Leaf litter decomposition and nutrient release dynamics of Flemingia semialata Roxb. were studied from May 2016 to April 2017 using the litter bag technique. The study on litter dynamics is needed to assess the nutrient release pattern before introduction in degraded or marginal lands or agroforestry systems for soil nutrient management practices in hilly northeast states of India. The initial N concentration, lignin content, and lignin/N ratio of leaf litter had significant positive correlations with decay coefficients. The annual decay rate constant (k) for dry matter was 0.01 day−1 (3.65 year−1) with t50 and t99 values of 96.43 and 695.73 days, respectively, indicating faster leaf litter decomposition. Initial C (51%), N (2.38%), and low lignin concentrations with low C/N (21.53) and lignin/N (4.05) ratios could be important factors in faster mass loss from the litter samples. The P mineralization k P (2.19) rate was higher than k N (0.73), indicating the slower release rate of N. The weight loss during decomposition was positively correlated with rainfall (r = 0.42) and temperature (r = 0.39). The study suggests that F. semialata leaf litter could be useful for regulating soil nutrient pool through faster litter turnover and can therefore be exploited as plantation and/or agroforestry species for soil and water conservation in degraded slopy terrain of the region.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"42 1","pages":"472 - 486"},"PeriodicalIF":1.6,"publicationDate":"2022-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49404122","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 : 2022-03-03DOI: 10.1080/10549811.2022.2045505
N. Samrat, Nahina Islam, Amlan Haque
ABSTRACT Hill forest vegetation cover in the southeastern part of Bangladesh has been facing degradation and depletion over a few decades. The forest estimation and mapping of this country are well documented and mainly restricted to the mangrove extent. However, the monitoring of the hill forest vegetation of Bangladesh is limited till now. This study monitor and analyzes the forest vegetation cover changes using Landsat imagery from 1974 to 2020, specifically in Khagrachari and Rangamati hill district, Bangladesh. We preprocess the satellite imagery and then perform a decision tree classification algorithm based on the spectral indexes derived from the imagery. The initial assessment indicates the negative change of dense vegetation/forest vegetation cover (FVC) in most parts of the study area since 1974. Further results show that ~57.17%, ~39.3%, ~31.27%, and ~24.97% of the total area were classified as FVC type in 1989,1999, 2010 and 2020, respectively. Besides, this study briefly discusses how the change of FVC impacts the life of the local indigenous community living around the area. This preliminary investigation highlights deforestation over the ~46 years around the study area, which could be beneficial for planning to manage and conserve forest resources, and protect the local indigenous community.
{"title":"Forest Land Cover Changes and Its Socio-economic Consequences on South-eastern Part of Bangladesh","authors":"N. Samrat, Nahina Islam, Amlan Haque","doi":"10.1080/10549811.2022.2045505","DOIUrl":"https://doi.org/10.1080/10549811.2022.2045505","url":null,"abstract":"ABSTRACT Hill forest vegetation cover in the southeastern part of Bangladesh has been facing degradation and depletion over a few decades. The forest estimation and mapping of this country are well documented and mainly restricted to the mangrove extent. However, the monitoring of the hill forest vegetation of Bangladesh is limited till now. This study monitor and analyzes the forest vegetation cover changes using Landsat imagery from 1974 to 2020, specifically in Khagrachari and Rangamati hill district, Bangladesh. We preprocess the satellite imagery and then perform a decision tree classification algorithm based on the spectral indexes derived from the imagery. The initial assessment indicates the negative change of dense vegetation/forest vegetation cover (FVC) in most parts of the study area since 1974. Further results show that ~57.17%, ~39.3%, ~31.27%, and ~24.97% of the total area were classified as FVC type in 1989,1999, 2010 and 2020, respectively. Besides, this study briefly discusses how the change of FVC impacts the life of the local indigenous community living around the area. This preliminary investigation highlights deforestation over the ~46 years around the study area, which could be beneficial for planning to manage and conserve forest resources, and protect the local indigenous community.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"42 1","pages":"487 - 505"},"PeriodicalIF":1.6,"publicationDate":"2022-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46093574","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}
J. Aguilar-Luna, Noé Cabrera-Barbecho, B. Barrios-Díaz, J. Loeza-Corte
The wave effect and the shyness phenomenon in Alnus acuminata (Kunth) are crown parameters rarely studied, but important in the quality of the wood of standing trees, therefore, a morphometric modeling of the crowns of Alnus acuminata in homogeneous forests in the Sierra Norte de Puebla was carried out. In 20 rectangular sites of 1,000 m2, the following were evaluated: total height (TA), normal diameter (ND), crown diameter (CD) and crown cover (CC). The Kruskal Wallis test was applied to data that did not meet the assumption of normality; for those that did, analysis of variance (ANOVA) was used, with Tukey mean comparison tests (α ≤ 0.05). The forest value index was 14.99, so its two-dimensional structure is normal based on DN, AT and CC. Its average slenderness index was 93.52, which makes the tree not very stable to mechanical damage. The life-space index was 38.92, which is high indicating that trees with low intraspecific competition developed better. At the canopy level, a pattern following an upward, oscillatory and constant wave effect was observed in groups of 10 trees. The shyness phenomenon showed an average crack opening of 27.39 cm between canopies, so this phenomenon is well defined for the species. It is concluded that in the crowns of Alnus acuminata, the wave effect is observed as a consequence of inequality in the acquisition of resources, and one way to minimize this inequality is through the phenomenon of botanical shyness.
摘要/ abstract摘要:本文对北普埃布拉(Sierra Norte de Puebla)均质森林中针叶桤木(Alnus acuminata, Kunth)树冠的波动效应和害羞现象进行了形态学建模，但这些参数对立木木材质量具有重要影响。在20个面积为1000 m2的矩形样地，对其总高度(TA)、法向直径(ND)、冠径(CD)和冠盖(CC)进行了评价。对不符合正态性假设的数据应用Kruskal Wallis检验;对存在差异的进行方差分析(ANOVA)，采用Tukey均值比较检验(α≤0.05)。森林价值指数为14.99，基于DN、AT和CC的二维结构是正常的，其平均长细指数为93.52，对机械损伤不太稳定。生命空间指数为38.92，表明种内竞争低的树种发育较好。在冠层水平，在10棵树组中观察到一个向上、振荡和恒定波效应的模式。羞怯现象表现为树冠之间的平均裂缝开口为27.39 cm，因此这种现象在该物种中是明确的。结果表明，在桤木树冠中，波浪效应是由于资源获取的不平等造成的，而减少这种不平等的一种方法是通过植物羞怯现象。
{"title":"Wave effect and shyness phenomenon in homogeneous forests of Alnus acuminata","authors":"J. Aguilar-Luna, Noé Cabrera-Barbecho, B. Barrios-Díaz, J. Loeza-Corte","doi":"10.24294/sf.v5i1.1615","DOIUrl":"https://doi.org/10.24294/sf.v5i1.1615","url":null,"abstract":"The wave effect and the shyness phenomenon in Alnus acuminata (Kunth) are crown parameters rarely studied, but important in the quality of the wood of standing trees, therefore, a morphometric modeling of the crowns of Alnus acuminata in homogeneous forests in the Sierra Norte de Puebla was carried out. In 20 rectangular sites of 1,000 m2, the following were evaluated: total height (TA), normal diameter (ND), crown diameter (CD) and crown cover (CC). The Kruskal Wallis test was applied to data that did not meet the assumption of normality; for those that did, analysis of variance (ANOVA) was used, with Tukey mean comparison tests (α ≤ 0.05). The forest value index was 14.99, so its two-dimensional structure is normal based on DN, AT and CC. Its average slenderness index was 93.52, which makes the tree not very stable to mechanical damage. The life-space index was 38.92, which is high indicating that trees with low intraspecific competition developed better. At the canopy level, a pattern following an upward, oscillatory and constant wave effect was observed in groups of 10 trees. The shyness phenomenon showed an average crack opening of 27.39 cm between canopies, so this phenomenon is well defined for the species. It is concluded that in the crowns of Alnus acuminata, the wave effect is observed as a consequence of inequality in the acquisition of resources, and one way to minimize this inequality is through the phenomenon of botanical shyness.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"108 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2022-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75881194","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 : 2022-03-01DOI: 10.1080/10549811.2022.2043168
G. Gebre, Asmiro Abeje Fikadu, Assefa Ataro Ambushe, D. Rahut
ABSTRACT This study aims to assess the role of area closure on the improvement of regeneration and composition of woody species in the Loma Bosa district of Dawuro zone, southwestern Ethiopia. It also examines factors affecting the adoption of area closure practices in the study area. The study confirmed that the socio-economic characteristics of the household have an incredible role on the adoption of area closure practices. Establishment of area closure has several benefits; among these, it improves the regeneration of woody species abundance, the ecological balance of the micro-environment, economic benefits for human beings, improves land productivity and minimizes land degradation and soil erosion. This study focuses on three key factors of disturbance for the area closure: illegal cutting of trees and shrubs, overgrazing, and wildfire. In line with this, the study observed a significant difference in farmers’ perception on the level of disturbance regime between the closed and open woody land areas. This paper indicates that area closure establishment is a key pathway for improving the regeneration and composition of woody species over the other benefits. Econometric results indicate that age, education level, family size, landholding, number of livestock owned, and access training are the main factors affecting the adoption of area closure practices.
{"title":"Factors Influencing the Adoption of Area Closure Practices in Loma Bosa District of Dawuro Zone, Southwestern Ethiopia","authors":"G. Gebre, Asmiro Abeje Fikadu, Assefa Ataro Ambushe, D. Rahut","doi":"10.1080/10549811.2022.2043168","DOIUrl":"https://doi.org/10.1080/10549811.2022.2043168","url":null,"abstract":"ABSTRACT This study aims to assess the role of area closure on the improvement of regeneration and composition of woody species in the Loma Bosa district of Dawuro zone, southwestern Ethiopia. It also examines factors affecting the adoption of area closure practices in the study area. The study confirmed that the socio-economic characteristics of the household have an incredible role on the adoption of area closure practices. Establishment of area closure has several benefits; among these, it improves the regeneration of woody species abundance, the ecological balance of the micro-environment, economic benefits for human beings, improves land productivity and minimizes land degradation and soil erosion. This study focuses on three key factors of disturbance for the area closure: illegal cutting of trees and shrubs, overgrazing, and wildfire. In line with this, the study observed a significant difference in farmers’ perception on the level of disturbance regime between the closed and open woody land areas. This paper indicates that area closure establishment is a key pathway for improving the regeneration and composition of woody species over the other benefits. Econometric results indicate that age, education level, family size, landholding, number of livestock owned, and access training are the main factors affecting the adoption of area closure practices.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"42 1","pages":"353 - 367"},"PeriodicalIF":1.6,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44699125","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 : 2022-03-01DOI: 10.1080/10549811.2022.2043906
J. C. Zekeng, Jean Louis Fobane, Hortense Elvire Biye, Djomo Chimi Cédric, Marguerite Marie Abada Mbolo
ABSTRACT This paper evaluates the potential effects of farmers’ species preferences on carbon stock in cocoa-based agroforestry systems (CAFS) in the Central Region of Cameroon. To achieve this goal, the species composition and structural variables of two land-use systems were investigated using 26 plots of 30 m × 30 m each, of which 20 were distributed in CAFS and 6 in adjacent secondary forests. Allometric models were used to estimate the species aboveground and root carbon stock. Ordination analysis indicated three types of species management systems: high-density timber and fruit trees; high-density Musaceae, palms and other shading trees; and low-density timber and fruit trees. The average densities of cocoa shading trees and shrubs were 234 ± 136 and 843 ± 360 individuals’ ha−1, respectively. Thus, the average potential carbon stock of the sampled CAFS was estimated at 186.97 ± 86.06 Mg C ha−1, 22% representing the root carbon stock. The transformation of secondary forest into various species management systems decreased the aboveground carbon by 18–34%. The annual rate of carbon accumulation estimated based on ring analyses was within the range 2.32–13.74 Mg C ha−1 year−1. The monetary value of the total carbon stored and the carbon accumulation rate were US$4042 ha−1and US$159 ha−1year−1, respectively.
摘要本文评估了喀麦隆中部地区农民的物种偏好对可可农林业系统（CAFS）碳储量的潜在影响。为了实现这一目标，使用26块30 m×30 m的地块对两个土地利用系统的物种组成和结构变量进行了调查，其中20块分布在CAFS，6块分布在邻近的次生林。异速生长模型用于估算物种地上和根系的碳储量。排序分析指出了三种类型的物种管理系统：高密度木材和果树；高密度的Musaceae、棕榈树和其他遮荫树；以及低密度木材和果树。可可遮荫树和灌木的平均密度分别为234±136和843±360公顷-1。因此，采样的CAFS的平均潜在碳储量估计为186.97±86.06 Mg C ha−1，22%代表根碳储量。次生林向各种物种管理系统的转变使地上碳减少了18-34%。根据环分析估计的年碳积累率在2.32–13.74 Mg C ha−1 year−1范围内。总碳储存的货币价值和碳积累率分别为4042公顷-1和159公顷-1年-1。
{"title":"Impact of Useful Species Preferences on Carbon Stocks and Annual Increments in Various Cocoa-based Agroforestry Systems in Central Region of Cameroon","authors":"J. C. Zekeng, Jean Louis Fobane, Hortense Elvire Biye, Djomo Chimi Cédric, Marguerite Marie Abada Mbolo","doi":"10.1080/10549811.2022.2043906","DOIUrl":"https://doi.org/10.1080/10549811.2022.2043906","url":null,"abstract":"ABSTRACT This paper evaluates the potential effects of farmers’ species preferences on carbon stock in cocoa-based agroforestry systems (CAFS) in the Central Region of Cameroon. To achieve this goal, the species composition and structural variables of two land-use systems were investigated using 26 plots of 30 m × 30 m each, of which 20 were distributed in CAFS and 6 in adjacent secondary forests. Allometric models were used to estimate the species aboveground and root carbon stock. Ordination analysis indicated three types of species management systems: high-density timber and fruit trees; high-density Musaceae, palms and other shading trees; and low-density timber and fruit trees. The average densities of cocoa shading trees and shrubs were 234 ± 136 and 843 ± 360 individuals’ ha−1, respectively. Thus, the average potential carbon stock of the sampled CAFS was estimated at 186.97 ± 86.06 Mg C ha−1, 22% representing the root carbon stock. The transformation of secondary forest into various species management systems decreased the aboveground carbon by 18–34%. The annual rate of carbon accumulation estimated based on ring analyses was within the range 2.32–13.74 Mg C ha−1 year−1. The monetary value of the total carbon stored and the carbon accumulation rate were US$4042 ha−1and US$159 ha−1year−1, respectively.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"42 1","pages":"399 - 420"},"PeriodicalIF":1.6,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45890001","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 : 2022-02-28DOI: 10.1080/10549811.2022.2045506
C. Fernández
ABSTRACT The effectiveness of mulching in reducing the risk of erosion has been evaluated in numerous studies. However, its effect on carbon loss has received less attention, despite the potentially negative effects on ecosystem recovery. In this study, the effects of straw helimulching on soil erosion and carbon loss in sediments were investigated after a severe wildfire in NW Spain during the first three years after fire. During the first year after the fire, the accumulated mean sediment yield was 12.4 Mg ha−1 in the control plots and 0.5 Mg ha−1 in the mulched plots. Soil erosion decreased sharply during the second year after the fire and was almost inexistent during the third year after the fire. No differences in carbon concentration were detected between treatments during the period of study. A significantly lower amount of carbon was lost after the mulching treatment due to its effectiveness in reducing sediment erosion. The mulching treatment did not significantly influence the amount of carbon sequestered in the vegetation. Although the application of mulch did not affect carbon fixation in vegetation, its application after fire can be considered a sustainable way of managing forest ecosystems to reduce the impact of fire on carbon emissions.
{"title":"Carbon Loss in Sediments and Sequestration in Vegetation after Wildfire and Mulching in a High-Severity Burned Area in NW Spain","authors":"C. Fernández","doi":"10.1080/10549811.2022.2045506","DOIUrl":"https://doi.org/10.1080/10549811.2022.2045506","url":null,"abstract":"ABSTRACT The effectiveness of mulching in reducing the risk of erosion has been evaluated in numerous studies. However, its effect on carbon loss has received less attention, despite the potentially negative effects on ecosystem recovery. In this study, the effects of straw helimulching on soil erosion and carbon loss in sediments were investigated after a severe wildfire in NW Spain during the first three years after fire. During the first year after the fire, the accumulated mean sediment yield was 12.4 Mg ha−1 in the control plots and 0.5 Mg ha−1 in the mulched plots. Soil erosion decreased sharply during the second year after the fire and was almost inexistent during the third year after the fire. No differences in carbon concentration were detected between treatments during the period of study. A significantly lower amount of carbon was lost after the mulching treatment due to its effectiveness in reducing sediment erosion. The mulching treatment did not significantly influence the amount of carbon sequestered in the vegetation. Although the application of mulch did not affect carbon fixation in vegetation, its application after fire can be considered a sustainable way of managing forest ecosystems to reduce the impact of fire on carbon emissions.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"42 1","pages":"506 - 517"},"PeriodicalIF":1.6,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43987917","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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