Andrea Markos, William Matt Jolly, Ernesto Alvarado, Harry Podschwit, Sebastian Barreto, Catherine Toban, Blanca Ponce, Vannia Aliaga-Nestares, Diego Rodriguez-Zimmermann
Fire hazard is often mapped as a static conditional probability of fire characteristics’ occurrence. We developed a dynamic product for operational risk management to forecast the probability of occurrence of fire radiative power in the locally possible near-maximum fire intensity range. We applied standard machine learning techniques to remotely sensed data. We used a block maxima approach to sample the most extreme fire radiative power (FRP) MODIS retrievals in free-burning fuels for each fire season between 2001 and 2020 and associated weather, fuel, and topography features in northwestern south America. We used the random forest algorithm for both classification and regression, implementing the backward stepwise repression procedure. We solved the classification problem predicting the probability of occurrence of near-maximum wildfire intensity with 75% recall out-of-sample in ten annual test sets running time series cross validation, and 77% recall and 85% ROC-AUC out-of-sample in a twenty-fold cross-validation to gauge a realistic expectation of model performance in production. We solved the regression problem predicting FRP with 86% r2 in-sample, but out-of-sample performance was unsatisfactory. Our model predicts well fatal and near-fatal incidents reported in Peru and Colombia out-of-sample in mountainous areas and unimodal fire regimes, the signal decays in bimodal fire regimes.
{"title":"Forecasting wildfire hazard across northwestern south America","authors":"Andrea Markos, William Matt Jolly, Ernesto Alvarado, Harry Podschwit, Sebastian Barreto, Catherine Toban, Blanca Ponce, Vannia Aliaga-Nestares, Diego Rodriguez-Zimmermann","doi":"10.24294/sf.v6i1.2490","DOIUrl":"https://doi.org/10.24294/sf.v6i1.2490","url":null,"abstract":"Fire hazard is often mapped as a static conditional probability of fire characteristics’ occurrence. We developed a dynamic product for operational risk management to forecast the probability of occurrence of fire radiative power in the locally possible near-maximum fire intensity range. We applied standard machine learning techniques to remotely sensed data. We used a block maxima approach to sample the most extreme fire radiative power (FRP) MODIS retrievals in free-burning fuels for each fire season between 2001 and 2020 and associated weather, fuel, and topography features in northwestern south America. We used the random forest algorithm for both classification and regression, implementing the backward stepwise repression procedure. We solved the classification problem predicting the probability of occurrence of near-maximum wildfire intensity with 75% recall out-of-sample in ten annual test sets running time series cross validation, and 77% recall and 85% ROC-AUC out-of-sample in a twenty-fold cross-validation to gauge a realistic expectation of model performance in production. We solved the regression problem predicting FRP with 86% r2 in-sample, but out-of-sample performance was unsatisfactory. Our model predicts well fatal and near-fatal incidents reported in Peru and Colombia out-of-sample in mountainous areas and unimodal fire regimes, the signal decays in bimodal fire regimes.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"6 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":"135405465","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 : 2023-10-16DOI: 10.1080/10549811.2023.2204788
Graeme P. Berlyn
Mountain forests occur on most of the continents on this planet. Definitions of what constitutes as a mountain forest can be arbitrary. A reasonable operational definition is “forests on land with an elevation of 2500 m a.s.l. or higher, irrespective of slope, or on land with an elevation of 300– 2500 m and a slope with sharp changes in elevation within a short distance” (Price et al., 2011). However, where they start and end on a particular mountain depends on its climate, soils, topography, other organisms that live in the forest, and random factors. To paraphrase the Greek philosopher Heraclitus no person climbs the same mountain twice because the mountain is not the same and the person is not the same. Mountain forests comprise about 20% of the world’s forests and provide many essential services such as preventing erosion and serving as water sheds (Price et al., 2011). Trees take up carbon dioxide (a greenhouse gas) and give off oxygen. The carbon dioxide is converted into woody tissue that sequesters the carbon and helps mitigate global warming for long periods of time. The oxygen released is required for all aerobic life. Like other forest types, mountain forests are a significant part of these processes. As I approach my nonagenarian years, I look back at 70 years of my close relationship with the mountain forests and I call for their sustainable management that can support and improve the capacity of mountain forests to provide environmental services (Gratzer & Keeton, 2017). Forests are complex systems. Each tree in a forest supports a diversity of life including insects, birds, mammals, mosses, and lichens (Körner, 2004; Perrigo et al., 2020). The complexity of a forested system is beyond what the eye can see as trees of the forest communicate both above and below ground in many ways. In the soil, the trees communicate by sharing soil resources with the help of a fungal network with the tree roots termed mycorrhizae. Above ground, the trees give off volatile compounds if they are attacked by pathogens and these stimulate neighboring trees to synthesize protective compounds like polyphenols. Some deeper-rooted trees can bring up water from great depths and exude it at shallower depths permitting other organisms to take it up. Tree roots also exude a variety of chemicals into the surrounding soil. Some of these attract beneficial soil microorganisms and create a special environment around the roots termed the rhizosphere. Other exudates given off by the roots of one species inhibit other species in a process called allelopathy. This gives a competitive advantage to the excreting species over other species in the competition for scarce resources. In the initial stage of forest formation from seedlings the tree stems are very dense, but as the forest develops the number of trees per hectare decreases as there is not enough space and resources for all the trees to grow large. This competition is especially evident at higher elevations when
{"title":"Some Thoughts on Mountain Forests: Their Benefits and Sustainability","authors":"Graeme P. Berlyn","doi":"10.1080/10549811.2023.2204788","DOIUrl":"https://doi.org/10.1080/10549811.2023.2204788","url":null,"abstract":"Mountain forests occur on most of the continents on this planet. Definitions of what constitutes as a mountain forest can be arbitrary. A reasonable operational definition is “forests on land with an elevation of 2500 m a.s.l. or higher, irrespective of slope, or on land with an elevation of 300– 2500 m and a slope with sharp changes in elevation within a short distance” (Price et al., 2011). However, where they start and end on a particular mountain depends on its climate, soils, topography, other organisms that live in the forest, and random factors. To paraphrase the Greek philosopher Heraclitus no person climbs the same mountain twice because the mountain is not the same and the person is not the same. Mountain forests comprise about 20% of the world’s forests and provide many essential services such as preventing erosion and serving as water sheds (Price et al., 2011). Trees take up carbon dioxide (a greenhouse gas) and give off oxygen. The carbon dioxide is converted into woody tissue that sequesters the carbon and helps mitigate global warming for long periods of time. The oxygen released is required for all aerobic life. Like other forest types, mountain forests are a significant part of these processes. As I approach my nonagenarian years, I look back at 70 years of my close relationship with the mountain forests and I call for their sustainable management that can support and improve the capacity of mountain forests to provide environmental services (Gratzer & Keeton, 2017). Forests are complex systems. Each tree in a forest supports a diversity of life including insects, birds, mammals, mosses, and lichens (Körner, 2004; Perrigo et al., 2020). The complexity of a forested system is beyond what the eye can see as trees of the forest communicate both above and below ground in many ways. In the soil, the trees communicate by sharing soil resources with the help of a fungal network with the tree roots termed mycorrhizae. Above ground, the trees give off volatile compounds if they are attacked by pathogens and these stimulate neighboring trees to synthesize protective compounds like polyphenols. Some deeper-rooted trees can bring up water from great depths and exude it at shallower depths permitting other organisms to take it up. Tree roots also exude a variety of chemicals into the surrounding soil. Some of these attract beneficial soil microorganisms and create a special environment around the roots termed the rhizosphere. Other exudates given off by the roots of one species inhibit other species in a process called allelopathy. This gives a competitive advantage to the excreting species over other species in the competition for scarce resources. In the initial stage of forest formation from seedlings the tree stems are very dense, but as the forest develops the number of trees per hectare decreases as there is not enough space and resources for all the trees to grow large. This competition is especially evident at higher elevations when ","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136113192","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}
Remote sensing technologies have revolutionized forestry analysis by providing valuable information about forest ecosystems on a large scale. This review article explores the latest advancements in remote sensing tools that leverage optical, thermal, RADAR, and LiDAR data, along with state-of-the-art methods of data processing and analysis. We investigate how these tools, combined with artificial intelligence (AI) techniques and cloud-computing facilities, enhance the analytical outreach and offer new insights in the fields of remote sensing and forestry disciplines. The article aims to provide a comprehensive overview of these advancements, discuss their potential applications, and highlight the challenges and future directions. Through this examination, we demonstrate the immense potential of integrating remote sensing and AI to revolutionize forest management and conservation practices.
{"title":"Advancements in remote sensing tools for forestry analysis","authors":"Shruti Kanga","doi":"10.24294/sf.v6i1.2269","DOIUrl":"https://doi.org/10.24294/sf.v6i1.2269","url":null,"abstract":"Remote sensing technologies have revolutionized forestry analysis by providing valuable information about forest ecosystems on a large scale. This review article explores the latest advancements in remote sensing tools that leverage optical, thermal, RADAR, and LiDAR data, along with state-of-the-art methods of data processing and analysis. We investigate how these tools, combined with artificial intelligence (AI) techniques and cloud-computing facilities, enhance the analytical outreach and offer new insights in the fields of remote sensing and forestry disciplines. The article aims to provide a comprehensive overview of these advancements, discuss their potential applications, and highlight the challenges and future directions. Through this examination, we demonstrate the immense potential of integrating remote sensing and AI to revolutionize forest management and conservation practices.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135853423","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}
Under the background of green economic transformation, the sustainable utilization of ecological resources has become a trend, and bamboo all-for-one tourism has become a new development direction for bamboo-resource-rich areas. Based on the all-for-one tourism model and characteristics of bamboo resources, this paper puts forward a bamboo all-for-one tourism model, which shows the relationship between resources, products, and markets, and elaborates on the joint effect mechanism of industrial environment, governance environment, and external environment. Taking Yibin City, Sichuan Province as an example, this paper also analyzes existing problems of developing bamboo all-for-one tourism and then proposes suggestions to provide effective analytical ideas and reference, such as establishing a market-oriented all-product development model, introducing the sustainable development concept of bamboo management, establishing the management concept of sharing by all people, and driving all industries developing in a coordinated way.
{"title":"A study on bamboo all-for-one tourism—Taking Yibin City, Sichuan Province, China as an example","authors":"Xiaoxiao Zhang, Fen Liao","doi":"10.24294/sf.v6i1.1990","DOIUrl":"https://doi.org/10.24294/sf.v6i1.1990","url":null,"abstract":"Under the background of green economic transformation, the sustainable utilization of ecological resources has become a trend, and bamboo all-for-one tourism has become a new development direction for bamboo-resource-rich areas. Based on the all-for-one tourism model and characteristics of bamboo resources, this paper puts forward a bamboo all-for-one tourism model, which shows the relationship between resources, products, and markets, and elaborates on the joint effect mechanism of industrial environment, governance environment, and external environment. Taking Yibin City, Sichuan Province as an example, this paper also analyzes existing problems of developing bamboo all-for-one tourism and then proposes suggestions to provide effective analytical ideas and reference, such as establishing a market-oriented all-product development model, introducing the sustainable development concept of bamboo management, establishing the management concept of sharing by all people, and driving all industries developing in a coordinated way.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"98 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76069299","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}
Root turnover is a key process of terrestrial ecosystem carbon cycle, which is of great significance to the study of soil carbon pool changes and global climate change. However, because there are many measurement and calculation methods of root turnover, the results obtained by different methods are quite different, and the current research on root turnover of forest ecosystem on the global regional scale is not sufficient, so the change law of root turnover of global forest ecosystem is still unclear. By collecting literature data and unifying the calculation method of turnover rate, this study integrates the spatial pattern of fine root turnover of five forest types in the world, and obtains the factors affecting fine root turnover of forest ecosystem in combination with soil physical and chemical properties and climate data. The results showed that there were significant differences in fine root turnover rate among different forest types, and it gradually decreased with the increase of latitude; the turnover rate of fine roots in forest ecosystem is positively correlated with annual average temperature and annual average precipitation; fine root turnover rate of forest ecosystem is positively correlated with soil organic carbon content, but negatively correlated with soil pH value. This study provides a scientific basis for revealing the law and mechanism of fine root turnover in forest ecosystem.
{"title":"Fine root turnover law and influencing factors in forest ecosystem","authors":"Jianing Zhao, Yun Liang, Y. Liu, Yujue Wang, Qianru Yang, Chunwang Xiao","doi":"10.24294/sf.v5i2.1630","DOIUrl":"https://doi.org/10.24294/sf.v5i2.1630","url":null,"abstract":"Root turnover is a key process of terrestrial ecosystem carbon cycle, which is of great significance to the study of soil carbon pool changes and global climate change. However, because there are many measurement and calculation methods of root turnover, the results obtained by different methods are quite different, and the current research on root turnover of forest ecosystem on the global regional scale is not sufficient, so the change law of root turnover of global forest ecosystem is still unclear. By collecting literature data and unifying the calculation method of turnover rate, this study integrates the spatial pattern of fine root turnover of five forest types in the world, and obtains the factors affecting fine root turnover of forest ecosystem in combination with soil physical and chemical properties and climate data. The results showed that there were significant differences in fine root turnover rate among different forest types, and it gradually decreased with the increase of latitude; the turnover rate of fine roots in forest ecosystem is positively correlated with annual average temperature and annual average precipitation; fine root turnover rate of forest ecosystem is positively correlated with soil organic carbon content, but negatively correlated with soil pH value. This study provides a scientific basis for revealing the law and mechanism of fine root turnover in forest ecosystem.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"30 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91228126","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 : 2022-11-30DOI: 10.1080/10549811.2022.2150417
C. D. Cédric, A. L. Meyabeme Elono, B. N. Nfornkah, G. W. Forje, P. A. Nyong, R. Kaam, Ernestine Orchelle Urbaine Ango, Banoho Kabelong Louis-Paul- Roger, Pany Noutanewo, Arnold Jovis Nguefack, Sorel Léocadie Inimbock, Mbobda Tabue Roger Bruno, Zapfack Louis, T. Martin
ABSTRACT In the Western Highlands of Cameroon, natural ecosystems have been significantly degraded, fostering other land-use types like bamboo stands. However, knowledge of the potential contribution of bamboo to climate change mitigation within the framework of payment for ecosystem services remains limited. This study sought to identify bamboo richness and estimate carbon stocks of dominant bamboo species in the context of payment for ecosystem services. Data collection combined information from local informants and biomass data of the main bamboo species. Bamboo biomass was collected by destructive method. The results obtained allow the identification of nine bamboo taxa in the Western Highlands of Cameroon. We found for Bambusa vulgaris and Phyllostachys aurea 13,330 ± 7718 and 38,010 ± 3361 culm ha−1, respectively. Total carbon stocks of bamboo estimated at 122.71 tC ha−1 for B. vulgaris and 125.41 tC ha−1 for P. aurea were not significantly different between bamboo species (Kruskal–Wallis test, p = .908). For bamboo areas in the Western Highlands, the monetary value of ecosystem services linked to bamboo carbon stocks is 1503 ± 624 USD ha−1 ranging from 1486 to 1519 USD ha−1 depending on the bamboo species. The monetary value of bamboo carbon stocks potential should help decision makers to consider adopting bamboo species as one of the sustainable strategies to restore degraded ecosystems.
{"title":"Biodiversity and Ecosystem Services of Bamboo Carbon Stocks Regulation in the Western Highlands of Cameroon","authors":"C. D. Cédric, A. L. Meyabeme Elono, B. N. Nfornkah, G. W. Forje, P. A. Nyong, R. Kaam, Ernestine Orchelle Urbaine Ango, Banoho Kabelong Louis-Paul- Roger, Pany Noutanewo, Arnold Jovis Nguefack, Sorel Léocadie Inimbock, Mbobda Tabue Roger Bruno, Zapfack Louis, T. Martin","doi":"10.1080/10549811.2022.2150417","DOIUrl":"https://doi.org/10.1080/10549811.2022.2150417","url":null,"abstract":"ABSTRACT In the Western Highlands of Cameroon, natural ecosystems have been significantly degraded, fostering other land-use types like bamboo stands. However, knowledge of the potential contribution of bamboo to climate change mitigation within the framework of payment for ecosystem services remains limited. This study sought to identify bamboo richness and estimate carbon stocks of dominant bamboo species in the context of payment for ecosystem services. Data collection combined information from local informants and biomass data of the main bamboo species. Bamboo biomass was collected by destructive method. The results obtained allow the identification of nine bamboo taxa in the Western Highlands of Cameroon. We found for Bambusa vulgaris and Phyllostachys aurea 13,330 ± 7718 and 38,010 ± 3361 culm ha−1, respectively. Total carbon stocks of bamboo estimated at 122.71 tC ha−1 for B. vulgaris and 125.41 tC ha−1 for P. aurea were not significantly different between bamboo species (Kruskal–Wallis test, p = .908). For bamboo areas in the Western Highlands, the monetary value of ecosystem services linked to bamboo carbon stocks is 1503 ± 624 USD ha−1 ranging from 1486 to 1519 USD ha−1 depending on the bamboo species. The monetary value of bamboo carbon stocks potential should help decision makers to consider adopting bamboo species as one of the sustainable strategies to restore degraded ecosystems.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"1 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44264816","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}
Climate and vegetation are variables of the physical space that have a dynamic and interdependent relationship. Flora modifies climatic elements and gives rise to a microclimate whose characterization is a function of regional climatic conditions and vegetation structure. The objective of this work was to compare the climatic variations (inside and outside) of the Caldén Forest in the Parque Luro Provincial Reserve. Temperature, relative humidity, wind speed, wind direction and precipitation data from two meteorological stations for 2012 were analyzed and statistically compared. The influence of the forest on climatic parameters was demonstrated and it was found that the greatest variations were in wind speed, daily temperature and precipitation.
{"title":"Microclimatic variations in the interior and exterior of the Caldén Forest (Prosopis caldenia), Argentina","authors":"V. Duval, Alicia María Campo","doi":"10.24294/sf.v5i2.1629","DOIUrl":"https://doi.org/10.24294/sf.v5i2.1629","url":null,"abstract":"Climate and vegetation are variables of the physical space that have a dynamic and interdependent relationship. Flora modifies climatic elements and gives rise to a microclimate whose characterization is a function of regional climatic conditions and vegetation structure. The objective of this work was to compare the climatic variations (inside and outside) of the Caldén Forest in the Parque Luro Provincial Reserve. Temperature, relative humidity, wind speed, wind direction and precipitation data from two meteorological stations for 2012 were analyzed and statistically compared. The influence of the forest on climatic parameters was demonstrated and it was found that the greatest variations were in wind speed, daily temperature and precipitation.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"62 1 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90697437","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 : 2022-11-22DOI: 10.1080/10549811.2022.2150219
Mingke Fang, A. Atapattu, Luxiang Lin, Shang-wen Xia, Xiaodong Yang
ABSTRACT Soil nutrients and their stoichiometry are important indicators of nutrient biogeochemical cycles and various ecological processes. Soil nutrients are heterogeneously distributed and can be influenced by plants through litterfall and root activity. To explore the associations between soil nutrients and relationships between soil nutrients and plant characteristics, we selected three canopy tree categories based on abundance as dominant, common, and rare, with different plant sizes based on DBH (diameter at breast height, cm) for each species from three 1 ha tropical forest sites (Bu-Beng, P55, and Na-Ban-He forests), and collected the topsoil (0–10 cm) for physiochemical analysis. The results showed that soil nutrient concentrations were significantly different among the three forest sites. For soil total C, N, and P associations, soil total C and N had significant associations at all three sites; however, the associations of soil total C-P and N-P varied among sites. The plant category had significant relationships with soil stoichiometry, whereas plant size had significant relationships with soil nutrient concentrations; these relationships varied among the three sites. The results indicate that soil nutrient heterogeneity is influenced by tree category and size. Future studies should include a larger sample size to further validate these results.
{"title":"Soil Nutrient Concentrations, Associations and Their Relationships with Canopy Tree Category and Size in the Southwestern China Tropical Rainforests","authors":"Mingke Fang, A. Atapattu, Luxiang Lin, Shang-wen Xia, Xiaodong Yang","doi":"10.1080/10549811.2022.2150219","DOIUrl":"https://doi.org/10.1080/10549811.2022.2150219","url":null,"abstract":"ABSTRACT Soil nutrients and their stoichiometry are important indicators of nutrient biogeochemical cycles and various ecological processes. Soil nutrients are heterogeneously distributed and can be influenced by plants through litterfall and root activity. To explore the associations between soil nutrients and relationships between soil nutrients and plant characteristics, we selected three canopy tree categories based on abundance as dominant, common, and rare, with different plant sizes based on DBH (diameter at breast height, cm) for each species from three 1 ha tropical forest sites (Bu-Beng, P55, and Na-Ban-He forests), and collected the topsoil (0–10 cm) for physiochemical analysis. The results showed that soil nutrient concentrations were significantly different among the three forest sites. For soil total C, N, and P associations, soil total C and N had significant associations at all three sites; however, the associations of soil total C-P and N-P varied among sites. The plant category had significant relationships with soil stoichiometry, whereas plant size had significant relationships with soil nutrient concentrations; these relationships varied among the three sites. The results indicate that soil nutrient heterogeneity is influenced by tree category and size. Future studies should include a larger sample size to further validate these results.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"42 1","pages":"1020 - 1035"},"PeriodicalIF":1.6,"publicationDate":"2022-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47388678","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}
Rui Bao, Tao Li, Xinyi Zhang, Xiao Fu, Yu Zhao, Mingfang Tang, H. Deng
Ecological environment damage events will destroy or damage the balance between animal and plant habitats and ecosystems, and even pose a threat to China’s ecological security. However, at present, there are some problems in the identification and evaluation of forest ecosystem damage, such as imperfect evaluation system, insufficient quantitative evaluation methods, imperfect damage compensation management system, and lack of analysis of the overall damage of the interaction between human activities and forest ecosystem. Based on the damaged object, the system involves a total of four first-class indicators, including physical damage, mental damage, economic forest fruit loss, forest by-products loss, processing and manufacturing loss, forest tourism loss, scientific research literature and history loss, soil conservation loss, water conservation loss, wind prevention and sand fixation loss, carbon fixation and oxygen release loss, atmospheric purification loss. There are 14 secondary indicators of emergency treatment fee and investigation and evaluation fee, as well as 22 tertiary indicators, and the value quantification method of each indicator is clarified by using market value method, alternative cost method, shadow engineering method, recovery cost method and other methods. The article also discusses the management system of forest ecosystem damage from the two aspects of forestry technology department and judicial administration department. The purpose is to provide reference for the quantification and standardization of forest ecosystem damage assessment technology and the improvement of management system.
{"title":"Study on forest ecosystem damage assessment system and management system","authors":"Rui Bao, Tao Li, Xinyi Zhang, Xiao Fu, Yu Zhao, Mingfang Tang, H. Deng","doi":"10.24294/sf.v5i2.1628","DOIUrl":"https://doi.org/10.24294/sf.v5i2.1628","url":null,"abstract":"Ecological environment damage events will destroy or damage the balance between animal and plant habitats and ecosystems, and even pose a threat to China’s ecological security. However, at present, there are some problems in the identification and evaluation of forest ecosystem damage, such as imperfect evaluation system, insufficient quantitative evaluation methods, imperfect damage compensation management system, and lack of analysis of the overall damage of the interaction between human activities and forest ecosystem. Based on the damaged object, the system involves a total of four first-class indicators, including physical damage, mental damage, economic forest fruit loss, forest by-products loss, processing and manufacturing loss, forest tourism loss, scientific research literature and history loss, soil conservation loss, water conservation loss, wind prevention and sand fixation loss, carbon fixation and oxygen release loss, atmospheric purification loss. There are 14 secondary indicators of emergency treatment fee and investigation and evaluation fee, as well as 22 tertiary indicators, and the value quantification method of each indicator is clarified by using market value method, alternative cost method, shadow engineering method, recovery cost method and other methods. The article also discusses the management system of forest ecosystem damage from the two aspects of forestry technology department and judicial administration department. The purpose is to provide reference for the quantification and standardization of forest ecosystem damage assessment technology and the improvement of management system.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"414 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2022-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77232514","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}
Forest fire can change the eco-stoichiometric characteristics of forest ecosystem elements, reflect the biogeochemical cycle change mode of forest ecosystem environment after fire, and clarify the eco-stoichiometric characteristics of carbon (C), nitrogen (N), phosphorus (P) in forest ecosystem under forest fire disturbance, which is very important for understanding the response mechanism of forest ecosystem to forest fire disturbance. By consulting a large number of relevant literatures, the author summarized and analyzed the impact mode of forest fire disturbance on the C–N–P eco-stoichiometric characteristics of forest ecosystem, as well as the impact of forest fire disturbance on the C–N–P eco-stoichiometric characteristics of plants, C–N–P eco-stoichiometric characteristics of litter, and C–N–P eco-stoichiometric characteristics of soil. It is considered that the C–N–P eco-stoichiometric characteristics of forest ecosystem are mainly affected by fire factors (fire intensity, fire frequency, recovery time after fire), vegetation types and soil properties. In view of the scientific problems that forest fire urgently needs to be solved in the study of forest ecosystem eco-stoichiometry, three aspects: the impact mechanism of forest fire disturbance on the homeostasis of plant eco-stoichiometry, the study of multi-element eco-stoichiometry under forest fire disturbance, the establishment of the eco-chemometrics relationship of the plant–litter–soil composite system under the interference of forest fire are proposed, in order to deeply understand the plant regulation strategy under the interference of forest fire, clarify the mutual coupling mechanism between multiple chemical elements after the interference of forest fire, and improve the relationship between the input and output of aboveground and underground nutrients with the plant–litter–soil as a composite whole, which is of great significance for a deep understanding of the nutrient cycle and balance of the forest ecosystem under the background of global climate change, and reasonable formulation of forest fire management measures.
{"title":"Research progress on the influence of forest fire on the eco-stoichiometric characteristics of carbon, nitrogen and phosphorus in forest ecosystem","authors":"Long Sun, X. Dou, T. Hu","doi":"10.24294/sf.v5i2.1627","DOIUrl":"https://doi.org/10.24294/sf.v5i2.1627","url":null,"abstract":"Forest fire can change the eco-stoichiometric characteristics of forest ecosystem elements, reflect the biogeochemical cycle change mode of forest ecosystem environment after fire, and clarify the eco-stoichiometric characteristics of carbon (C), nitrogen (N), phosphorus (P) in forest ecosystem under forest fire disturbance, which is very important for understanding the response mechanism of forest ecosystem to forest fire disturbance. By consulting a large number of relevant literatures, the author summarized and analyzed the impact mode of forest fire disturbance on the C–N–P eco-stoichiometric characteristics of forest ecosystem, as well as the impact of forest fire disturbance on the C–N–P eco-stoichiometric characteristics of plants, C–N–P eco-stoichiometric characteristics of litter, and C–N–P eco-stoichiometric characteristics of soil. It is considered that the C–N–P eco-stoichiometric characteristics of forest ecosystem are mainly affected by fire factors (fire intensity, fire frequency, recovery time after fire), vegetation types and soil properties. In view of the scientific problems that forest fire urgently needs to be solved in the study of forest ecosystem eco-stoichiometry, three aspects: the impact mechanism of forest fire disturbance on the homeostasis of plant eco-stoichiometry, the study of multi-element eco-stoichiometry under forest fire disturbance, the establishment of the eco-chemometrics relationship of the plant–litter–soil composite system under the interference of forest fire are proposed, in order to deeply understand the plant regulation strategy under the interference of forest fire, clarify the mutual coupling mechanism between multiple chemical elements after the interference of forest fire, and improve the relationship between the input and output of aboveground and underground nutrients with the plant–litter–soil as a composite whole, which is of great significance for a deep understanding of the nutrient cycle and balance of the forest ecosystem under the background of global climate change, and reasonable formulation of forest fire management measures.","PeriodicalId":54313,"journal":{"name":"Journal of Sustainable Forestry","volume":"1 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2022-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72857928","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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