Download or read book SPECIES COMPOSITION DRIVES ECOLOGICAL STABILITY IN DRY FORESTS OF THE GREAT LAKES ST LAWRENCE FOREST REGION OF ONTARIO CANADA written by and published by . This book was released on 2015 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of species diversity on the stability of ecosystem functions such as productivity, within all spatial and temporal scales, has long been debated in ecology. Extensive research in grassland ecosystems has suggested a positive diversity effect on stability at the community-level due to the insurance hypothesis, but a negative effect at the population-level due to interspecific competition. The few experiments that have investigated the diversity-stability relationship within forest ecosystems have generated inconsistent results, and general conclusions for these systems are currently lacking. Predicted increases in the frequency of short term drought events in the Great Lakes-St. Lawrence (GLSL) forest region of Ontario, Canada, raise concerns about potential effects of climate change on forest ecosystems. The knowledge gap regarding the importance of diversity and composition effects on tree growth in the deciduous-coniferous forest zone of the GLSL must be addressed to anticipate and mitigate some of the effects of climate change in these forests. My dendrochronological research tested the hypotheses that increasing species diversity increases the community-level stability and decreases the population-level stability to a severe short-term drought event in forest tree assemblages typical of dry forests in the GLSL forest region. The assemblages that were studied spanned a gradient of 15 different combinations of species richness and composition of four tree species. The drought that was studied occurred in 2005 and was characterized by high temperature, low precipitation and reduced tree growth. A total of 63 plots representing replicate assemblages were selected to collect increment cores (n=1193) and reconstruct growth responses to past drought at the community and population-levels. The stability of growth of the assemblages was determined by using crossdated tree-ring measurements to reconstruct basal area increment (BAI) and calculate standard indices of resistance, resilience and productivity of the tree communities and populations to the drought. Statistical analysis identified a significant compositional effect on community-level resistance and productivity. White pine ( Pinus strobus L.) abundance was associated with a lower community resistance and white birch (Betula papyrifera Marsh.) abundance with a higher resistance. Assemblages with greater productivity were often characterized by the high abundance of trembling aspen. There was no overall effect of the assemblage gradient on the population-level stability; however, red pine productivity was higher in combination with trembling aspen ( Populus tremuloides Michx.) and white birch. If pine forests were managed to maintain a component of deciduous species, the capacity to dampen the community-level effects of more frequent drought would increase.
Download or read book Forest Management Guide for Great Lakes St Lawrence Landscapes written by Ontario. Ministry of Natural Resources and published by . This book was released on 2010 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: This guide provides direction to forest managers on maintaining or enhancing natural landscape structure, composition and patterns that provide for the long term health of forest ecosystems in an efficient and effective manner. This volume of the Landscape Guide addresses only the Great Lakes-St. Lawrence forest region of Ontario. It is intended to make the forest management planning process more efficient and the direction provided by the guide more accessible, not only to the Ministry of Natural Resources and the forest industry but also to the public. Equally as important, this new approach for setting strategic level direction in the forest management plans reflects the most recent scientific understanding of managing forest ecosystems, with the intent of ensuring the conservation of forest biodiversity in the province.--Ministry of Natural Resources website.
Download or read book Ecological Effects of Forest Forest in the Boreal and Great Lakes St Lawrence Forest Regions of Ontario an Annotated Bibliography written by Ontario. Min. of Natural Resources and published by . This book was released on 1997 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecological Properties for the Evaluation of Eastern Ontario Forest Ecosystems written by Paul A. Keddy and published by [Kemptville, Ont.] : Eastern Ontario Model Forest = Forêt modèle de l'est de l'Ontario. This book was released on 1995 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecological Regions of North America written by and published by . This book was released on 1997 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume represents a first attempt at holistically classifying and mapping ecological regions across all three countries of the North American continent. A common analytical methodology is used to examine North American ecology at multiple scales, from large continental ecosystems to subdivisions of these that correlate more detailed physical and biological settings with human activities on two levels of successively smaller units. The volume begins with an overview of North America from an ecological perspective, concepts of ecological regionalization. This is followed by descriptions of the 15 broad ecological regions, including information on physical and biological setting and human activities. The final section presents case studies in applications of the ecological characterization methodology to environmental issues. The appendix includes a list of common and scientific names of selected species characteristic of the ecological regions.
Download or read book Indicator Plant Species in Canadian Forests written by Gordon S. Ringius and published by UBC Press. This book was released on 1997 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant species that convey information about the ecological nature of a site are known as indicator species. A wide variety of site conditions including soil nutrient and moisture regimes, forest humus types, soil reaction, and general soil type can be determined from the presence of plant species.This field guide is an introduction to the concept of plants as indicators of environmental conditions within Canada's forests. It provides information on the identification, ecology, geographic range, and indicator value of 80 selected vascular plants, mosses, and lichens. Indicator Plant Species in Canadian Forests will be of interest to resource planners, foresters, ecologists, botanists, naturalists, and anyone who wishes to know more about forest plants and what they tell us about the sites they occupy.
Download or read book Towards a Set of Biodiversity Indicators for Canadian Forests written by Daniel William McKenney and published by Sault Ste. Marie : Canadian Forest Service--Ontario. This book was released on 1994 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Canadian Forest Service held a workshop to produce a preliminary list of recommended indicators of forest biodiversity. The workshop featured group discussions on species- and system-based indicators, and presentations on such topics as biodiversity indicators for Canadian forests, background and perspectives on biodiversity in Canadian forests, the issue of saving species versus saving ecosystems, the need for ecosystem vital signs, and forest biodiversity activities in various provinces. This volume contains summaries of the workshop results and the texts of the papers presented.
Download or read book Where the Forest Meets the River written by Elizabeth A. Holmes and published by . This book was released on 1999 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Changes in the Forest Composition in the Great Lakes St Lawrence Forest Region of Ontario and Resultant Outbreaks of the Spruce Budworm written by John F. Bowen and published by . This book was released on 1979 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Pilot Landscape Ecological Model for Forests in Central Ontario written by Larry E. Band and published by Sault Ste. Marie, Ont. : Ontario Ministry of Natural Resources. This book was released on 1993 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecoregional Forest Composition Analysis for Northwestern Ontario Present Forest Condition written by G. D. Racey and published by Thunder Bay, Ont. : Northwest Science and Technology. This book was released on 2000 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Examination of Eco regional and Eco distinct Species Composition for Three Forest Management Units in Northwestern Ontario written by Craig Danton Crosson and published by . This book was released on 2002 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of the Vulnerability of Forest Vegetation of Ontario s Clay Belt Ecodistrict 3E 1 to Climate Change written by William Charles Parker and published by . This book was released on 2012-11 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The vulnerability of the forest vegetation of Ontario's northern Clay Belt region to climate change was assessed using forest tree species composition and forest productivity as indicators. Changes in species composition were examined using the modelled bioclimatic niche of 15 tree species under current and future climate projected for three periods (2011-2040, 2041-2070, 2071-2100) using four general circulation models and two emissions scenarios (A2, B1). Using climate projections from an ensemble model for these same scenarios and periods as inputs to climate-based site index and genecological models, changes in height growth were examined for several major tree species of the region as a measure of effects of climate on forest productivity. Major northward geographic shifts in species bioclimatic niche were projected, resulting in suitable climatic habitat decreasing for boreal forest species of the region, and becoming more favourable for species currently associated with more southern, i.e., Great Lakes-St. Lawrence, areas."--publisher.
Download or read book Semi automated Species Classification in Ontario Great Lakes St Lawrence Forest Conditions written by and published by . This book was released on 2009 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Landscape Ecological Model for Management of Ontario Forests written by Larry E. Band and published by Sault Ste. Marie, Ont. : Ontario Ministry of Natural Resources. This book was released on 1994 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the work accomplished under Phase 2 of a project to develop and apply a landscape ecological model to aid in the understanding and management of Ontario forest ecosystems. The first year concentrated on the initial development and testing of a data and simulation system to predict and understand forest productivity and water cycling for a test area in the Temagami District of Ontario. The second year's efforts further extended and developed the landscape model for three additional ecosystems along a significant east-west gradient across the province. The sites were chosen to provide both a broad geographic range in location and biome and a set of comprehensive measurements of forest productivity and hydrology for model diagnosis and validation. The three areas incorporated into the east-west gradient are the Petawawa National Forest Institute near Pembroke, the Turkey Lakes Experimental Watershed north of Sault Ste. Marie, and the area around Rinker Lake, north of Thunder Bay. Modifications and improvements were implemented in the digital terrain analysis methods, in the user interface, and in specific process modules.
Download or read book Selection of Wildlife Species as Indicators of Forest Sustainability in Ontario written by and published by . This book was released on 1998 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarizes a workshop held to assist in the selection of species to be used as legal indicators of sustainability under the Ontario Crown Forest Sustainability Act and its regulated Forest Management Planning Manual, and to recommend a suite of species whose populations can be monitored to provide an indication of broad forest condition. The workshop included working groups formed to select appropriate species from the following groups: Great Lakes/St. Lawrence birds, boreal birds, and amphibians, reptiles, and mammals together). Tables are presented representing results of group deliberations concerning the most indicative habitat and age class for each species, and final recommendations for indicators based on both discussions at the workshop and subsequent comments.
Download or read book Field Guide to the Forest Ecosystem Classification for Northwestern Ontario written by Canada. Forestry Canada and published by [Sault Ste. Marie, Ont.] : Forestry Canada. This book was released on 1990* with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt:
