Size Class Distribution And Spatial Proximity Of Fires In A Simulated Boreal Forest Fire Regime In Relation To Ontarios Policy Directions For Emulating Natural Disturbance
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Author | : Ajith Perera |
Publisher | : |
Total Pages | : 40 |
Release | : 2009 |
Genre | : Nature |
ISBN | : |
Download Size Class Distribution and Spatial Proximity of Fires in a Simulated Boreal Forest Fire Regime in Relation to Ontario's Policy Directions for Emulating Natural Disturbance Book in PDF, Epub and Kindle
In the other three ecoregions, it underestimated fire size distribution under all simulation scenarios. The guide's direction for spatial proximity was not congruent with results from any simulated scenario in any ecoregion. However, the probability of spatial proximity was low in all but one ecoregion. In addition to the assessment of NDPE guide's direction, this study demonstrates that fire size distributions appear to be unique to ecoregions, and that these can vary further if the fire weather conditions change."--Abstract
Author | : Wenbin Cui |
Publisher | : |
Total Pages | : 54 |
Release | : 2009 |
Genre | : Business & Economics |
ISBN | : |
Download Using BFOLDS to Characterize Fire Regimes Book in PDF, Epub and Kindle
Forest fires are the result of complex interactions of weather and vegetation and are highly probabilistic. Characterizing forest fire regimes, the synoptic properties of spatio-temporal variability of individual fires, is important for many forest and fire management purposes. BFOLDS 1.0 (Boreal Forest Landscape Dynamics Simulator) simulates forest fires and forest succession for large areas over long periods. Resulting fire regime simulations are emergent properties of many stochastic and spatially explicit model processes as well as user assumptions and input data. Here the authors demonstrate the use of BFOLDS in characterizing a forest fire regime, using a large boreal ecoregion as an example and readily available forest cover and spatial weather data as primary input.--Document.
Author | : |
Publisher | : |
Total Pages | : 80 |
Release | : 2011 |
Genre | : Reference |
ISBN | : |
Download Ontario Forest Research Institute Publications 2006-2010 Book in PDF, Epub and Kindle
"This bibliography includes a list and descriptions of the content of publications written or co-authored by staff of the Ontario Ministry of Natural Resources' Ontario Forest Research Institute between 2006 and 2010. During this five-year period, over 150 publications were produced by the institute's 14 research scientists, including a book, 83 journal articles, 31 reports, 10 technical notes, 5 newsletters, and 11 papers/summaries in conference/ workshop proceedings. The overall focus of the publications is forest resource management-related research and practice. Topical areas and scales of investigation are diverse and include natural disturbance regimes and landscape dynamics; carbon budgets and effects of climate change on forests; and silviculture studies on site preparation, tree improvement, vegetation management, growth and yield, disease management, and harvesting in conifer, mixedwood, and hardwood forests. Author and subject indexes are provided."--Document.
Author | : Ajith H. Perera |
Publisher | : |
Total Pages | : 44 |
Release | : 2006 |
Genre | : Nature |
ISBN | : |
Download Multiple Scale Research Studies on Boreal Forest Fires Regimes to Inform Ontario's Policies for Emulating Natural Forest Disturbances Book in PDF, Epub and Kindle
This prospectus presents a broad framework for a series of research studies to investigate Ontario boreal forest fire regime at multiple scales. The broad research goal is to reduce uncertainties in knowledge about boreal forest fire regimes related to policy directions in Ministry of Natural Resources' Forest management guide for natural disturbance pattern emulation. The research studies are grouped into three categories: reviews and syntheses of published literature; determining the characteristics of the broad-scale fire regime in boreal Ontario; and spatial mapping and monitoring.
Author | : Muhammad Waseem Ashiq |
Publisher | : |
Total Pages | : |
Release | : 2011 |
Genre | : |
ISBN | : |
Download Ontario Boreal Fire Regimes in the Context of Lightning-caused Ignition Point Spatial Patterns Book in PDF, Epub and Kindle
Lightning-caused forest fires are one of the major natural disturbances in Ontario managed boreal forests. Survival of these forests with fires for centuries shows that such disturbances are integral to the boreal ecosystem and its ecological functioning. Characterizing the fire regimes defined by fire ignition frequency, fire sizes and their spatial distribution patterns etc. thus can help to improve our understanding of the boreal forest dynamics and provide guidance for management practices attempting to maintain biodiversity and achieve sustainability. In this thesis the lightning-caused fire ignitions data for four ecoregions in Ontario managed boreal forests (3E, 3W, 3S and 4S) for 1960-2009 were analyzed using pattern analysis and density estimation to determine the spatial nature of fire ignitions. These fire ignition spatial patterns were further used (as weighted ignition scenario) to simulate forest fire regimes in the study area. Fire regimes were also simulated using spatially unweighted ignitions (unweighted ignition scenario). Non-spatial (total number of fires, total burn area, number of fires by size classes, annual burn fraction) and spatial (spatial burn probability) indicators of the simulated fire regimes under both ignition scenarios were compared to test the null hypothesis that modeled forest fire regime is not affected by the spatial patterns of input fire ignitions. All data analysis were performed for individual ecoregions. Spatial pattern of ignitions were analyzed using the nearest neighbour index and Ripley's K-function. Ignition densities were estimated using the adaptive kernel density estimation method and the fire regimes were simulated using BFOLDS (Boreal Forests Landscape Dynamics Simulator). Results showed that lightning-caused fire ignitions are clustered in all ecoregions. Fire ignition density also varied spatially within ecoregions. Overall fire ignition density was highest in the northwestern ecoregion (4S) and lowest in the eastern ecoregion (3E), which corresponds to the combined gradient of effective humidity and temperature in Ontario. For each ecoregion, comparison of non-spatial simulated fire regime indicators showed statistically non-significant differences between unweighted and weighted ignitions. The spatial burn probability however captured clear spatial differences between unweighted and weighted ignitions. Spatial differences in spatial burn probability between both ignition scenarios were more prominent in ecoregions of high fire occurrence. Results of the weighted ignition scenario closely followed the spatial patterns of the estimated fire ignition density in the study area. Based on these results this thesis rejects the null hypothesis and emphasizes that ignition patterns must be considered in simulating fire regime in Ontario boreal forests.
Author | : |
Publisher | : |
Total Pages | : 68 |
Release | : 2008 |
Genre | : Forests and forestry |
ISBN | : |
Download Forest Research Report Book in PDF, Epub and Kindle
Author | : Ajith Perera |
Publisher | : |
Total Pages | : 62 |
Release | : 2008 |
Genre | : Nature |
ISBN | : |
Download BFOLDS 1.0 Book in PDF, Epub and Kindle
"Boreal forest landscape dynamics simulator (BFOLDS) is a fire regime-succession simulation model that can be used to explore long-term forest cover changes at large spatial extents. This report documents BFOLDS' structure, components, assumptions, functionality, and applications."--Document.
Author | : Yves Bergeron |
Publisher | : MDPI |
Total Pages | : 433 |
Release | : 2018-04-13 |
Genre | : Science |
ISBN | : 3038423904 |
Download Fire Regimes: Spatial and Temporal Variability and Their Effects on Forests Book in PDF, Epub and Kindle
This book is a printed edition of the Special Issue "Fire Regimes: Spatial and Temporal Variability and Their Effects on Forests" that was published in Forests
Author | : Chao Li |
Publisher | : [Sault Ste. Marie, Ont.] : Ministry of Natural Resources |
Total Pages | : 60 |
Release | : 1996 |
Genre | : Nature |
ISBN | : |
Download Ontario Fire Regime Model Book in PDF, Epub and Kindle
Author | : Ajith Perera |
Publisher | : |
Total Pages | : 72 |
Release | : 2008 |
Genre | : Nature |
ISBN | : |
Download An Assessment of Tree, Snag and Downed Wood Residuals in Boreal Fires in Relation to Ontario's Policy Directions for Emulating Natural Forest Disturbance Book in PDF, Epub and Kindle
Due to residual tree mortality, the complement of snag and downed wood residuals increased in time. After three years, abundance of large diameter residual trees was very low, and congruent with directions provided in the NDPE guide for retaining residual trees post-harvest. Local fire intensity appeared to be the most important global determinant of occurrence of residual trees, but with an inverse relationship. Our results do not support the hypotheses that pre-burn forest cover and site conditions are reliable global predictors of residual tree occurrence."--Abstract