Pub Date : 2018-01-01DOI: 10.4172/2168-9776.1000214
K. Mh, Hariri Mf
Field experiment was carried out at the Experimental Farm of the Salinity and Alkalinity laboratory, Sabaheia- Alexandria, to quantify growth, biomass and chemical composition on responses of lebbeck and chinaberry to three levels of drought stress and three organic amendments after two successive seasons of 2015 and 2016. The results indicated that well-watered treatment had the higher values of height growth, stem diameter, leaves number, shoots dry weight, shoots: roots (S: R) ratio, total chlorophyll and total carotenoides. On the other hand, severe treatment (50% field capacity) resulted in the highest values of roots dry weight, proline and total phenols contents for both tree species. Compost was better to enhance the growth parameters of lebbeck while, humate was the better to increase growth parameters of chinaberry. Total chlorophyll and total carotenoides of the two species were enhanced by adding humate. The interaction results indicated that the highest values of growth parameters of lebbeck resulted from compost combined with moderate or well-watered treatments. While humic acid combined with well-watered or moderate treatments were the best for growth of chinaberry seedlings.
{"title":"Improving Growth of Lebbeck and Chinaberry Transplants for Drought by Using Organic Amendments","authors":"K. Mh, Hariri Mf","doi":"10.4172/2168-9776.1000214","DOIUrl":"https://doi.org/10.4172/2168-9776.1000214","url":null,"abstract":"Field experiment was carried out at the Experimental Farm of the Salinity and Alkalinity laboratory, Sabaheia- Alexandria, to quantify growth, biomass and chemical composition on responses of lebbeck and chinaberry to three levels of drought stress and three organic amendments after two successive seasons of 2015 and 2016. The results indicated that well-watered treatment had the higher values of height growth, stem diameter, leaves number, shoots dry weight, shoots: roots (S: R) ratio, total chlorophyll and total carotenoides. On the other hand, severe treatment (50% field capacity) resulted in the highest values of roots dry weight, proline and total phenols contents for both tree species. Compost was better to enhance the growth parameters of lebbeck while, humate was the better to increase growth parameters of chinaberry. Total chlorophyll and total carotenoides of the two species were enhanced by adding humate. The interaction results indicated that the highest values of growth parameters of lebbeck resulted from compost combined with moderate or well-watered treatments. While humic acid combined with well-watered or moderate treatments were the best for growth of chinaberry seedlings.","PeriodicalId":35920,"journal":{"name":"林业科学研究","volume":"31 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81814224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.4172/2168-9776.1000216
L. Qiu, D. Zhang, H. Huang, Q. Xiong, G. Zhang
To predict the distribution of Mikania micrantha, one of the most harmful invasive plants in Guangzhou City, the author selected relevant environmental factors and established a feasible simple model based on BP neural network to use its strong nonlinear ability in this paper. From this model, it is concluded that the distribution possibility of Mikania micrantha in Liwan District, Yuexiu District and Haizhu District is near 0, which are classified as regions without invasion risk; the distribution possibility in Conghua District and Huadu District is 60% and 69.3% respectively, which are defined as regions with low invasion risk; the distribution possibility in Baiyun District, Panyu District, Zengcheng District and Nansha District are much higher, which are identified as regions with high invasion risk; while the distribution possibility in Luogang District, Tianhe District and Huangpu District are the highest, which are determined as regions with highest risk.
{"title":"BP Neural Network Based Prediction of Potential Mikania micrantha Distribution in Guangzhou City","authors":"L. Qiu, D. Zhang, H. Huang, Q. Xiong, G. Zhang","doi":"10.4172/2168-9776.1000216","DOIUrl":"https://doi.org/10.4172/2168-9776.1000216","url":null,"abstract":"To predict the distribution of Mikania micrantha, one of the most harmful invasive plants in Guangzhou City, the author selected relevant environmental factors and established a feasible simple model based on BP neural network to use its strong nonlinear ability in this paper. From this model, it is concluded that the distribution possibility of Mikania micrantha in Liwan District, Yuexiu District and Haizhu District is near 0, which are classified as regions without invasion risk; the distribution possibility in Conghua District and Huadu District is 60% and 69.3% respectively, which are defined as regions with low invasion risk; the distribution possibility in Baiyun District, Panyu District, Zengcheng District and Nansha District are much higher, which are identified as regions with high invasion risk; while the distribution possibility in Luogang District, Tianhe District and Huangpu District are the highest, which are determined as regions with highest risk.","PeriodicalId":35920,"journal":{"name":"林业科学研究","volume":"198 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77291022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.4172/2168-9776.1000217
Zeng Ws
Forest ecosystem is the largest carbon bank on land, and biomass models will be essential basis for evaluating carbon sequestration capacity of forests. Based on the general biomass model M=0.3pD7/3 presented by Zeng and Tang, one-variable individual tree aboveground biomass models for all 34 tree species or groups in China were established using the data of wood basic density of all tree species published; and based on the mensuration data of the National Forest Biomass Modeling Program, the aboveground biomass models of 14 tree species or genera were validated. Additionally, compatible belowground biomass models and root-to-shoot ratio models for two species groups, coniferous and broadleaved, were developed and evaluated. The results showed that the averages of absolute relative errors of above- and below-ground biomass estimates from one-variable biomass models developed in this study were less than the error allowances 10% and 15%, respectively. The developed biomass models here could be applied to estimate forest biomass at national level and would be important supplement to the ministerial standards on biomass models which were promulgated and implemented in the recent years.
{"title":"Developing One-variable Individual Tree Biomass Models based on Wood Density for 34 Tree Species in China","authors":"Zeng Ws","doi":"10.4172/2168-9776.1000217","DOIUrl":"https://doi.org/10.4172/2168-9776.1000217","url":null,"abstract":"Forest ecosystem is the largest carbon bank on land, and biomass models will be essential basis for evaluating carbon sequestration capacity of forests. Based on the general biomass model M=0.3pD7/3 presented by Zeng and Tang, one-variable individual tree aboveground biomass models for all 34 tree species or groups in China were established using the data of wood basic density of all tree species published; and based on the mensuration data of the National Forest Biomass Modeling Program, the aboveground biomass models of 14 tree species or genera were validated. Additionally, compatible belowground biomass models and root-to-shoot ratio models for two species groups, coniferous and broadleaved, were developed and evaluated. The results showed that the averages of absolute relative errors of above- and below-ground biomass estimates from one-variable biomass models developed in this study were less than the error allowances 10% and 15%, respectively. The developed biomass models here could be applied to estimate forest biomass at national level and would be important supplement to the ministerial standards on biomass models which were promulgated and implemented in the recent years.","PeriodicalId":35920,"journal":{"name":"林业科学研究","volume":"30 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86987570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.4172/2168-9776.1000221
Nazish Nazir, A. Kamili, Durdana Shah, Zargar My
Taxus wallichiana Zucc. (Himalayan yew), is precious for taxol or paclitaxel removal used in the research of anti-cancer drugs (ovarian cancers, AIDS related cancers and other indications). It is a slow growing tree species due toits very poor natural regeneration and very low seed germination. The present investigation tested the consequenceof different plant growth regulators such as, Indole Butyric Acid (IBA), Indole-3- Acetic Acid (IAA) and NaphthaleneAcetic Acid (NAA) on adventitious rooting of Himalayan yew shoot cuttings in four different seasons (spring,summer, autumn and winter) under nursery conditions. Shoot cuttings were treated with diverse concentrations ofIBA, IAA and NAA. However, IBA at 1000 ppm in spring season (Mar-May) showed best response in stipulations ofroot length, root number and rooting percentage. The present investigation reveals that this method has thepotentiality of using the young shoot cuttings of Himalayan yew in presence of plant growth regulating hormone IBAfor its propagation and production on large extent to congregate the increasing stipulate.
{"title":"Adventitious Rooting in Shoot Cuttings of Taxus wallichiana Zucc., an Endangered Medicinally Important Conifer of Kashmir Himalaya","authors":"Nazish Nazir, A. Kamili, Durdana Shah, Zargar My","doi":"10.4172/2168-9776.1000221","DOIUrl":"https://doi.org/10.4172/2168-9776.1000221","url":null,"abstract":"Taxus wallichiana Zucc. (Himalayan yew), is precious for taxol or paclitaxel removal used in the research of anti-cancer drugs (ovarian cancers, AIDS related cancers and other indications). It is a slow growing tree species due toits very poor natural regeneration and very low seed germination. The present investigation tested the consequenceof different plant growth regulators such as, Indole Butyric Acid (IBA), Indole-3- Acetic Acid (IAA) and NaphthaleneAcetic Acid (NAA) on adventitious rooting of Himalayan yew shoot cuttings in four different seasons (spring,summer, autumn and winter) under nursery conditions. Shoot cuttings were treated with diverse concentrations ofIBA, IAA and NAA. However, IBA at 1000 ppm in spring season (Mar-May) showed best response in stipulations ofroot length, root number and rooting percentage. The present investigation reveals that this method has thepotentiality of using the young shoot cuttings of Himalayan yew in presence of plant growth regulating hormone IBAfor its propagation and production on large extent to congregate the increasing stipulate.","PeriodicalId":35920,"journal":{"name":"林业科学研究","volume":"99 5 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83617755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.4172/2168-9776.1000215
Z. Mohammadi, S. M. Limaei
The aim of this research is to investigate the sustainability of economic, social and environmental aspects in Iranian Caspian forests. To do so, questionnaires were used for data collection. The questionnaires were distributed among the forestry experts in Guilan province, north of Iran. Analytic Hierarchy Process (AHP) and the Network Analysis (ANP) were used for prioritizing the indicators of sustainable forest management. Investigated criteria and indicators are derived from the Near Middle East Process. The Expert Choice and Super Decision software were used for data analysis. The results of this study showed that the wood products sub-criterion and conservation of biological diversity have been known the most important criteria in the sustainable forest management in the study area using of AHP and ANP. Furthermore, the priorities of the other indicators are different in AHP and ANP. This could be due to the reciprocity relations in the ANP and this method has more strengths than AHP.
{"title":"Multiple Criteria Decision-Making Approaches for Forest Sustainability (Case Study: Iranian Caspian Forests)","authors":"Z. Mohammadi, S. M. Limaei","doi":"10.4172/2168-9776.1000215","DOIUrl":"https://doi.org/10.4172/2168-9776.1000215","url":null,"abstract":"The aim of this research is to investigate the sustainability of economic, social and environmental aspects in Iranian Caspian forests. To do so, questionnaires were used for data collection. The questionnaires were distributed among the forestry experts in Guilan province, north of Iran. Analytic Hierarchy Process (AHP) and the Network Analysis (ANP) were used for prioritizing the indicators of sustainable forest management. Investigated criteria and indicators are derived from the Near Middle East Process. The Expert Choice and Super Decision software were used for data analysis. The results of this study showed that the wood products sub-criterion and conservation of biological diversity have been known the most important criteria in the sustainable forest management in the study area using of AHP and ANP. Furthermore, the priorities of the other indicators are different in AHP and ANP. This could be due to the reciprocity relations in the ANP and this method has more strengths than AHP.","PeriodicalId":35920,"journal":{"name":"林业科学研究","volume":"6 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73671546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.4172/2168-9776.1000219
W. Gebretsadik
The present study highlights the effect of seedling quality on the resultant early performance of our planted tree seedlings. Four priority species tree seedlings: Cordia africana, Casuarina equisetifolia, Cupressus lusitania and Grevillia robusta were raised in the nursery using recommended substrate mixes of ratio (3% top soil: 2% manure: 1% sand). Seedlings were then sorted in to sturdiness quotient classes: quotient class one (I) comprising height to collar diameter ratio less than 6 and quotient class two (II) height to collar diameter ratio greater than 6 to compare early growth and survival among species and evaluate the significance of correlations between quotient categories and tree growth parameters on the degraded highlands of Yerer, Ethiopia. Two factor RCBD with three replications was used as an experimental design to handle eight factor combinations that resulted from four species types and two quotient classes. ANOVA indicated significant difference among tree species tested in the study area in terms of survival and early growth performances at P=0.05. Casuarina equisetifolia though its height and diameter performance in varying quotient categories was not statistically different it was found a priority species to establish plantation in the study area. The correlations between quotient categories and growth parameters were found statistically non-significant at P=0.05. Cupressus lusitanica and Grevellia robusta followed in the priority list to best adapt the site though the observed differences were not attributed to the anticipated variation in sturdiness quotient. Thus, the study results revealed that sturdiness quotient plays lower predictive role in early growth performances and survival of planted seedlings and it was found out to be a less rigorous quality parameter.
{"title":"Assessing the Role of Quality Thresholds on Early Performance of Tree Seedlings Planted on Degraded Highlands","authors":"W. Gebretsadik","doi":"10.4172/2168-9776.1000219","DOIUrl":"https://doi.org/10.4172/2168-9776.1000219","url":null,"abstract":"The present study highlights the effect of seedling quality on the resultant early performance of our planted tree seedlings. Four priority species tree seedlings: Cordia africana, Casuarina equisetifolia, Cupressus lusitania and Grevillia robusta were raised in the nursery using recommended substrate mixes of ratio (3% top soil: 2% manure: 1% sand). Seedlings were then sorted in to sturdiness quotient classes: quotient class one (I) comprising height to collar diameter ratio less than 6 and quotient class two (II) height to collar diameter ratio greater than 6 to compare early growth and survival among species and evaluate the significance of correlations between quotient categories and tree growth parameters on the degraded highlands of Yerer, Ethiopia. Two factor RCBD with three replications was used as an experimental design to handle eight factor combinations that resulted from four species types and two quotient classes. ANOVA indicated significant difference among tree species tested in the study area in terms of survival and early growth performances at P=0.05. Casuarina equisetifolia though its height and diameter performance in varying quotient categories was not statistically different it was found a priority species to establish plantation in the study area. The correlations between quotient categories and growth parameters were found statistically non-significant at P=0.05. Cupressus lusitanica and Grevellia robusta followed in the priority list to best adapt the site though the observed differences were not attributed to the anticipated variation in sturdiness quotient. Thus, the study results revealed that sturdiness quotient plays lower predictive role in early growth performances and survival of planted seedlings and it was found out to be a less rigorous quality parameter.","PeriodicalId":35920,"journal":{"name":"林业科学研究","volume":"1 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90871618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-09-21DOI: 10.4172/2168-9776.1000209
B. Oswald, Yuhui Weng, Farrish Kw, J. Grogan, W. Kruckeberg, T. Barton
A desire by landowners to diversify potential income sources has resulted in an increased interest in silvopasture. This intensive land management option allows for the production of timber, livestock and/or forage on the same land base. With traditional plantation systems featuring loblolly pine (Pinus taeda) common in the western gulf coast region of the southeastern United States, comparisons of tree growth are needed to justify the use of silvopasture. This study evaluated the height, diameter and volume growth 13 years post-establishment of loblolly pine in both silvopasture and plantation spacings on a single site in east Texas. Individual trees in silvopasture plots had greater diameter and volume than those in plantation plots; however, plantation plots yielded greater volume per hectare. The greater volume per hectare was driven by the greater number of trees planted (1282 trees ha-1) in plantation plots than those planted (598 trees ha-1) in silvopasture. In silvopasture, site resources are concentrated on producing larger-diameter, sawtimber size, and theoretically, higher-value trees.
{"title":"A Comparison of Tree Growth in Loblolly Pine (Pinus taeda) Plantations and Silvopasture Settings in East Texas","authors":"B. Oswald, Yuhui Weng, Farrish Kw, J. Grogan, W. Kruckeberg, T. Barton","doi":"10.4172/2168-9776.1000209","DOIUrl":"https://doi.org/10.4172/2168-9776.1000209","url":null,"abstract":"A desire by landowners to diversify potential income sources has resulted in an increased interest in silvopasture. This intensive land management option allows for the production of timber, livestock and/or forage on the same land base. With traditional plantation systems featuring loblolly pine (Pinus taeda) common in the western gulf coast region of the southeastern United States, comparisons of tree growth are needed to justify the use of silvopasture. This study evaluated the height, diameter and volume growth 13 years post-establishment of loblolly pine in both silvopasture and plantation spacings on a single site in east Texas. Individual trees in silvopasture plots had greater diameter and volume than those in plantation plots; however, plantation plots yielded greater volume per hectare. The greater volume per hectare was driven by the greater number of trees planted (1282 trees ha-1) in plantation plots than those planted (598 trees ha-1) in silvopasture. In silvopasture, site resources are concentrated on producing larger-diameter, sawtimber size, and theoretically, higher-value trees.","PeriodicalId":35920,"journal":{"name":"林业科学研究","volume":"3 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2017-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80973760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-09-01DOI: 10.4172/2168-9776.1000208
Michael B. Tiller, B. Oswald, Alyx S. Frantzen, W. Conway, I. Hung
Forest understory fuels can have profound effects on fire behavior and crown fire initiation. Accurate fire behavior prediction in understory fuels is an essential component for estimating fire intensity and severity during wildfire and prescribed fire events. This study focused on estimating temporal and seasonal changes in fuel loading parameters associated with the expansion of invasive yaupon (Ilex vomitoria), Chinese privet (Ligustrum sinense), and Chinese tallow (Triadica sebifera) in East Texas pine and hardwood ecosystems. Fuel loading data of invasive species infested sites indicated significant increases in understory biomass when compared to 1988 estimates, suggesting a clear need to revise regional fuel models. Multiple and simple regression biomass prediction equations were developed for all three-invasive species to facilitate fuel load estimates. These improved prediction equations will enhance fire management efforts as well as invasive species mitigation efforts in east Texas.
{"title":"Biomass estimations of invasives Yaupon, Chinese Privet and Chinese Tallow in east Texas Hardwood and Pine Ecosystems","authors":"Michael B. Tiller, B. Oswald, Alyx S. Frantzen, W. Conway, I. Hung","doi":"10.4172/2168-9776.1000208","DOIUrl":"https://doi.org/10.4172/2168-9776.1000208","url":null,"abstract":"Forest understory fuels can have profound effects on fire behavior and crown fire initiation. Accurate fire behavior prediction in understory fuels is an essential component for estimating fire intensity and severity during wildfire and prescribed fire events. This study focused on estimating temporal and seasonal changes in fuel loading parameters associated with the expansion of invasive yaupon (Ilex vomitoria), Chinese privet (Ligustrum sinense), and Chinese tallow (Triadica sebifera) in East Texas pine and hardwood ecosystems. Fuel loading data of invasive species infested sites indicated significant increases in understory biomass when compared to 1988 estimates, suggesting a clear need to revise regional fuel models. Multiple and simple regression biomass prediction equations were developed for all three-invasive species to facilitate fuel load estimates. These improved prediction equations will enhance fire management efforts as well as invasive species mitigation efforts in east Texas.","PeriodicalId":35920,"journal":{"name":"林业科学研究","volume":"43 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90736835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-09-01DOI: 10.4172/2168-9776.1000207
B. Oswald, Nienke Brouwer, E. Willemsen
Estimating the spread of wildland fire is growing concern in the Netherlands, where fire events at the wildland urban interface is a growing concern with a changing climate. A multi-year project was initiated in 2012 to obtain field-based fuel measurements to be used to estimate wildland fire spread for surface fire. The overall objective was to develop either custom fuel models or utilize existing Northern American fuel models to fuel conditions in some of the hazardous vegetation in the Netherlands. Over a four-year period, 96 plots were established, a wide variety of fuel parameters measured, and ANOVA (p ≤ 0.1) and Duncan’s MRT used to place these into 56 different vegetation communities. Following multiple permutations in Behaveplus, the 56 communities were consolidated into 28 different fuel models. It was then attempted to use these fuel models as input variables in a Dutch-developed wildland fire spread model. Some fuel models produced similar fire spread, and since they were within relatively similar communities, were combined, resulting in 21 working fuel models. The results of this project will provide land managers, fire brigades and landowners more accurate wildland fire spread estimations, improving safety of the public in this densely populated country. The results of this project will contribute to more accurate and detailed calculations of the NBVM (Dutch wildfire spreadmodel). The NBVM will provide necessary information, to be able to reduce the risk on uncontrollable wildfires, via wildfire prevention measurements and during an incident, to support decision making.
{"title":"Initial Development of Surface Fuel Models for The Netherlands","authors":"B. Oswald, Nienke Brouwer, E. Willemsen","doi":"10.4172/2168-9776.1000207","DOIUrl":"https://doi.org/10.4172/2168-9776.1000207","url":null,"abstract":"Estimating the spread of wildland fire is growing concern in the Netherlands, where fire events at the wildland urban interface is a growing concern with a changing climate. A multi-year project was initiated in 2012 to obtain field-based fuel measurements to be used to estimate wildland fire spread for surface fire. The overall objective was to develop either custom fuel models or utilize existing Northern American fuel models to fuel conditions in some of the hazardous vegetation in the Netherlands. Over a four-year period, 96 plots were established, a wide variety of fuel parameters measured, and ANOVA (p ≤ 0.1) and Duncan’s MRT used to place these into 56 different vegetation communities. Following multiple permutations in Behaveplus, the 56 communities were consolidated into 28 different fuel models. It was then attempted to use these fuel models as input variables in a Dutch-developed wildland fire spread model. Some fuel models produced similar fire spread, and since they were within relatively similar communities, were combined, resulting in 21 working fuel models. The results of this project will provide land managers, fire brigades and landowners more accurate wildland fire spread estimations, improving safety of the public in this densely populated country. The results of this project will contribute to more accurate and detailed calculations of the NBVM (Dutch wildfire spreadmodel). The NBVM will provide necessary information, to be able to reduce the risk on uncontrollable wildfires, via wildfire prevention measurements and during an incident, to support decision making.","PeriodicalId":35920,"journal":{"name":"林业科学研究","volume":"27 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84758722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-08-20DOI: 10.4172/2168-9776.1000206
B. Oswald, Lanham, Bataineh Mm, Kroll Jc, Y. Zhang
Changes in pinon-juniper (Pinus spp., Juniperusspp.) communities across the southwestern United States have often decreased ecological diversity of the understory and increases of exotic species. Reconstructing age and establishment patterns provides essential understanding to guide treatments and management for anthropogenically-altered forests. The goal of this study was to determine how patterns of pinon and juniper growth in the Davis Mountains, Texas, varied over time and how this pattern influenced wildlife habitat of several indicator species. Establishment patterns and basal area growth progression were identified, canopy cover estimates regressed from pre-developed canopy regression equations to re-construct historic forest stand structure and canopy characteristics in twenty-year intervals and applied to known wildlife habitat requirements of Montezuma quail (Cyrtonyx montezumae), black bear (Ursus americanus) and White-tailed deer/Mule deer (Odocoileus virginianus/O. hemionus). The sites provided habitat for these wildlife species, but the specific habitat provided changed over time. Prescribed burning could promote better forage for black bear while fire exclusion could improve dense cover for escape and denning cover. Montezuma quail would use thinner, less-dense habitats for forage, loafing and escape cover and the denser stand dynamics for cover and shelter. If forage habitat for Montezuma quail is required, the more open habitats found in the early 1900’s could be re-established by prescribed burning and tree removal. Habitat for White-tailed deer transitioned from more open forage, loafing, fawning cover in the early 1900’s to denser thermal, and escape cover in the later 1900’s. Mule deer habitat transitioned from a preferred open habitat to a more dense cover habitat that would be utilized primarily for bedding. Prescribed burning and tree removal to open up the current habitat would benefit Mule deer and white-tailed deer to a lesser degree.
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