Download or read book An Assessment of Residual Patches in Boreal Fires in Relation to Ontario s Policy Directions for Emulating Natural Forest Disturbance written by Ajith Perera and published by . This book was released on 2009 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Forest Management Guide for Natural Disturbance Pattern Emulation (NDPE), which has been applied in Ontario since 2003, specifies directions and provides standards and guidance to emulate fire disturbances. Included in the NDPE guide are specific directions about the amount of residual structure to be retained during forest harvest. Improved understanding of the characteristics of post-fire residual structure in natural conditions will help forest policymakers to provide better strategic guidance for emulating natural fire disturbance patterns during forest harvesting, and forest managers to make better tactical decisions about retaining post-harvest residual structure to emulate fire disturbances. The objective of this report is to characterize the extent and variability of post-fire residual patch occurrence in natural boreal forest fire events to better understand their extent and spatial patterns and to relate these results to the directions provided in Ontario's NDPE guide.--Document.
Download or read book An Assessment of Residual Patches in Boreal Fires in Relation to Ontario s Policy Directions for Emulating Natural Forest Disturbance written by Ajith Perera and published by . This book was released on 2009 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Forest Management Guide for Natural Disturbance Pattern Emulation (NDPE), which has been applied in Ontario since 2003, specifies directions and provides standards and guidance to emulate fire disturbances. Included in the NDPE guide are specific directions about the amount of residual structure to be retained during forest harvest. Improved understanding of the characteristics of post-fire residual structure in natural conditions will help forest policymakers to provide better strategic guidance for emulating natural fire disturbance patterns during forest harvesting, and forest managers to make better tactical decisions about retaining post-harvest residual structure to emulate fire disturbances. The objective of this report is to characterize the extent and variability of post-fire residual patch occurrence in natural boreal forest fire events to better understand their extent and spatial patterns and to relate these results to the directions provided in Ontario's NDPE guide.--Document.
Download or read book An Assessment of Tree Snag and Downed Wood Residuals in Boreal Fires in Relation to Ontario s Policy Directions for Emulating Natural Forest Disturbance written by and published by . This book was released on 2008 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this study were to characterize the abundance and variability in residual stand structure within unsuppressed boreal forest fire events to understand the extent of post-fire residual structure (residual trees, residual snags, and downed wood), its within- and among-fire variability, as well as how it changes during the first few years following the fire. Specifically, the report examines unsuppressed fires in boreal Ontario in order to describe the extent and variability of the residual structure that results from forest fires, and to document the immediate post-fire changes that occur in residual structure.
Download or read book An Assessment of Tree Snag and Downed Wood Residuals in Boreal Fires in Relation to Ontario s Policy Directions for Emulating Natural Forest Disturbance written by Ajith Perera and published by . This book was released on 2008 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Multiple Scale Research Studies on Boreal Forest Fires Regimes to Inform Ontario s Policies for Emulating Natural Forest Disturbances written by Ajith H. Perera and published by . This book was released on 2006 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book A Review of Published Knowledge on Post fire Residuals Relevant to Ontario s Policy Directions for Emulating Natural Disturbance written by Ajith H. Perera and published by . This book was released on 2007 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fire intensity within forest fires varies as weather and site conditions change, leaving live forest patches, and individual trees, as well as dead structure as standing trees and downed stems. Such remnant structure from pre-burn forests are collectively known as post-fire residuals. This review of the literature is focused on establishing the state of knowledge on post-fire residuals as relevant to directions in Ontario's Forest management guide for natural disturbance pattern emulation (NDPE). It covers information reported for boreal North America, captured from reports that are published and universally accessible. The report includes a description of the methodological steps followed in searching, reviewing, and synthesizing literature; definitions and descriptions of post-fire residuals; abundance and variability of specific types of post-fire residual structure; and associations of post-fire residual structure with forest cover, site conditions, and fire behaviour. It also identifies knowledge gaps and uncertainties about aspects of post-fire residual structure that are relevant to the NDPE guide directions.--Includes text from document.
Download or read book Characterizing the Spatial Patterns and Spatially Explicit Probabilities of Post Fire Vegetation Residual Patches in Boreal Wildfire Scars written by Yikalo Hayelom Araya and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ontario Forest Research Institute Publications 2006 2010 written by and published by . This book was released on 2011 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: "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.
Download or read book An Analysis of Residual Patches in Forest Harvest Disturbances Prior to the Implementation of the Forest Management Guide for Natural Disturbance Pattern Emulation and a Summary of Dead and Live Stem Volumes Proportions that Should be Considered when Modelling Landscapes Using the Forest Management Guides in Boreal Ontario written by Elkie, Philip C and published by Thunder Bay : Ontario, Northwest Science & Information. This book was released on 2003 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 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 written by Ajith Perera and published by . This book was released on 2009 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book The Effects of Grain Size on Morphological Patterns and Land Cover Within Boreal Wildfire Residual Patches written by Budhendra Oudesh Singh and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book What Happens to Tree Residuals in Boreal Forest Fires and what Causes the Changes written by Ajith Perera and published by . This book was released on 2011 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report details a study where temporal changes in tree and snags residuals were monitored annually following four boreal fires in Ontario using 50 sample plots. The goal was to examine the changes in residual trees and snags during the immediate post fire period in the boreal forest, where natural fire disturbances are common.--Document.
Download or read book Boreal Forest Succession in Ontario written by M. Drescher and published by . This book was released on 2008 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forest succession can be viewed, from a tree-centric point of view, as the temporal pattern of changes in tree species composition that occur following a disturbance that destroyed the existing forest cover, and includes the initial re-establishment of the forest cover. Fire is one such natural disturbance in boreal forests. The broad goal of the work reported here was to explore the body of boreal forest succession knowledge, to elucidate its strengths, weaknesses, and gaps, and to quantify its levels of uncertainty.--Document.
Download or read book Ontario Fire Regime Model written by Chao Li and published by [Sault Ste. Marie, Ont.] : Ministry of Natural Resources. This book was released on 1996 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Climate Change and the Future Fire Environment in Ontario written by Mike Wotton and published by Sault Ste Marie : Ontario Ministry of Natural Resources, Applied Research and Development. This book was released on 2005 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increased fi re load is expected to increase the cost of fi re management in the province 16% by the year 2040 and 54% by the year 2090 over year 2000 costs, exclusive of infl ation or other factors. [...] In addition to increases in seasonal fi re severity indices, a number of these studies also predict increases in the frequency of occurrence of extreme fi re danger in some areas of the country (e.g., Stocks et al. [...] This study uses lightning- and people-caused fi re occurrence models developed specifi cally for Ontario with GCM projections of future climate and Ontario's level of protection analysis software, LEOPARDS (see McAlpine and Hirsch 1999) to estimate the impacts of climate change on the fi re management organization both in terms of numbers of escaped fi res and with respect to changes in operationa [...] The sites of the GCM grid cell centres and OMNR weather stations used are shown in Figure 1. Fire Weather and Fire Danger To create the fi re climate of a future decade, the monthly anomalies were applied to the daily data from the OMNR fi re weather station archive from the years 1992-2001 (corresponding to the period over which lightning records were available). [...] The Fire Behaviour Prediction (FBP) System (Forestry Canada Fire Danger Group 1992) was used in conjunction with the Initial Spread Index (ISI), the Build-up Index (BUI) (calculated on the detection date of the fi re using the FWI System), and the fuel type associated with the fi re to estimate an initial rate of spread for each fi re.
Download or read book A Proposed Method to Rank the Intensity of Boreal Forests Fires in Ontario Using Post fire High resolution Aerial Photographs written by T. Smith and published by . This book was released on 2008 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fire intensity is a crucial descriptor of fire behaviour that may also be an important determinant of many types of ecological dynamics. However, fire intensity has proven challenging to measure directly. Indirect estimates of fire intensity are often confounded with the ecological effects of the fire, precluding further study of the relationships between intensity and population or community dynamics. In this report, the authors describe a novel method for estimating the intensity of fires in the boreal forest of Ontario using high resolution imagery taken soon after fire. This method relies on an empirical relationship between the branch structure of fire-killed trees (crown fraction burned) and fire intensity rankings provided by the Canadian Forest Fire Behaviour Prediction System (FBP) and its field guide for fire managers. The results of the application of this method to 660 high resolution aerial photography sample plots, each 25 m in diameter, dispersed among 11 fires that occurred in the boreal forest of Ontario in 2005 are described.--Document.
Download or read book Ontario Boreal Fire Regimes in the Context of Lightning caused Ignition Point Spatial Patterns written by Muhammad Waseem Ashiq and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
