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Conference Proceedings (Renewable Resources)

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  1. Climatic and anthropogenic effects on atmospheric mercury accumulation rates in ombrotrophic bogs from Southern Ontario [Download]

    Title: Climatic and anthropogenic effects on atmospheric mercury accumulation rates in ombrotrophic bogs from Southern Ontario
    Creator: Givelet, N.
    Subjects: Atmospheric elements, Peat bogs, Mercury
    Date Created: 2003
  2. Analytical procedures for the determination of selected trace elements in age dated peat profiles [Download]

    Title: Analytical procedures for the determination of selected trace elements in age dated peat profiles
    Creator: Krachler, M.
    Subjects: Peat bogs, Age-dated profiles, Trace elements
    Date Created: 2003
  3. Managing fire for woodland caribou in Jasper and Banff National Parks [Download]

    Title: Managing fire for woodland caribou in Jasper and Banff National Parks
    Creator: Shepherd, L.
    Description: Abstract: Woodland caribou (Rangifer tarandus caribou) populations in Jasper (JNP) and Banff National Parks (BNP) have declined since the 1970s, coincident with reduced fire activity in both parks, relative to historic levels. Some researchers have suggested that long periods without fire may cause habitat deterioration for woodland caribou, primarily by reducing available lichen forage. We examined winter habitat selection by woodland caribou at coarse and fine scales based on GPS-derived telemetry data and used models that included stand origin (decade), topography, and several stand structure variables that are related to time since fire, to explore relationships among caribou, lichen, and fire history. Based on the relationships illustrated by the models, we assessed how fire management could be applied to caribou conservation in JNP and BNP. At a coarse scale, caribou selected old forest (> 75 years) in landscapes that have likely experienced less frequent wildfire. While the abundance of Cladonia spp. influenced caribou use at fine scales, a preference for areas with older trees within stands was also significant. We conclude that short-term habitat protection for woodland caribou in JNP and BNP likely requires fire exclusion from caribou range.
    Subjects: Rangifer tarandus caribou, Fire management, Resource selection functions, Lichen, Forage, Multi-scale models, Habitat, Cladonia, Generalized linear models
    Date Created: 2007
  4. Evaluation of carabid beetles as indicators of forest change in Canada [Download]

    Title: Evaluation of carabid beetles as indicators of forest change in Canada
    Creator: Work, T.T.
    Description: Our objective was to assess the potential of carabid beetles (Coleoptera: Carabidae) as effective bioindicators of the effects of forest management at a Canadian national scale. We present a comparison of carabid beetle assemblages reported from large-scale Studies across Canada. Based on the initial response following disturbance treatment, we found that carabid assemblages consistently responded to disturbance, but responses of individual species and changes in species composition were nested within the context of regional geography and finer scale differences among forest ecosystems. We also explored the relationship between rare and dominant taxa and species characteristics as they relate to dispersal capacity and use of within-stand habitat features such as coarse woody debris. We found no relationship between life-history characteristics (such as body size, wing morphology, or reported associations with downed wood) and the relative abundance Or frequency Of occurence of species. Our results suggest that carabids are better suited to finer scale evaluations of the effects of forest management than to regional or national monitoring programs. We also discuss several knowledge gaps that currently limit the full potential of using carabids as bioindicators.
    Subjects: Habitat fragmentation, Pitfall traps, Ground beetles, Patterns, Coleoptera, Boreal forest, Abundance, Management, Assemblages, Quebec
    Date Created: 2008
  5. A 6,000 year record of atmospheric mercury accumulation in the high Arctic from peat deposits on Bathurst Island, Nunavut, Canada [Download]

    Title: A 6,000 year record of atmospheric mercury accumulation in the high Arctic from peat deposits on Bathurst Island, Nunavut, Canada
    Creator: Givelet, N.
    Subjects: Atmospheric elements, Mercury, Peat bogs
    Date Created: 2003
  6. Saproxylic insect assemblages in Canadian forests: diversity, ecology and conservation [Download]

    Title: Saproxylic insect assemblages in Canadian forests: diversity, ecology and conservation
    Creator: Langor, D. W.
    Description: Saproxylic insect assemblages inhabiting dead wood in Canadian forests are highly diverse and variable but quite poorly understood. Adequate assessment of these assemblages poses significant challenges with respect to sampling, taxonomy, and analysis. Their assessment is nonetheless critical to attaining the broad goals of sustainable forest management because Such species are disproportionately threatened elsewhere by the reductions in dead wood generally associated with commercial exploitation of northern forests. The composition of the saproxylic fauna is influenced by many factors, including tree species, degree of decay, stand age, and cause of tree death. Wildfire and forest harvesting have differential impacts on saproxylic insect assemblages and on their recovery in postdisturbance stands. Exploration of saproxylic insect responses to variable retention harvesting and experimental burns is contributing to the development of prescriptions for conserving saproxylic insects in boreal forests. Understanding of processes that determine diversity patterns and responses of saproxylic insects Would benefit front increased attention to natural history. Such work Should aim to provide a habitat-classification system for dead wood to better identify habitats (and associated species) at risk its a result of forest management. This tool Could also be used to improve strategies to better maintain saproxylic organisms and their central nutrient-cycling functions in managed forests.
    Subjects: Dead wood, Growth boreal forests, Species richness, Beetles coleoptera, Decaying wood, Coarse woody debris, Community composition, Natural-disturbance, Spruce forests, Southeastern Ontario
    Date Created: 2008
  7. Mandibles and labrum-epipharynx of tiger beetles: Basic structure and evolution (Coleoptera, Carabidae, Cicindelitae) [Download]

    Title: Mandibles and labrum-epipharynx of tiger beetles: Basic structure and evolution (Coleoptera, Carabidae, Cicindelitae)
    Creator: Ball, G. E.
    Description: Abstract: Using for comparison with, and as outgroups for, supertribe Cicindelitae, we describe and illustrate the mandibles and labrum-epipharynx of the basal geadephagans Trachypachus gibbsii LeConte, 1861 (family Trachypachidae), and family Carabidae: Pelophila rudis (LeConte, 1863) (supertribe Nebriitae, tribe Pelophilini) and Ceroglossus chilensis (Eschscholtz, 1829) (supertribe Carabitae, tribe Ceroglossini). The range and pattern of variation in structure of mandibles and labrum-epipharynx within the supertribe Cicindelitae was assessed using scanning-electron (SEM) images of these structures in nine exemplar taxa: Amblycheila baroni (Rivers, 1890), Omus californicus (Eschscholcz, 1829) and Picnochile fallaciosa (Chevrolat, 1854) (representing the Amblycheilini); Manticora tuberculata (DeGeer, 1778) (representing the Manticorini): let-nu-ha carolina (Linnaeus, 1767) (representing the Megacephalini); Pogonostoma chalybeum (Klug, 1835) (representing the Collyridini); and Therates basalis Dejean, 1826, Oxycheila species, and Cicindela longilabris Say, 1824 (representing the Cicindelini). An evolutionary transformation series was postulated for the mandibles and labrum-epipharynx, based on a reconstructed phylogenetic sequence, which, in turn, was based on morphological and DNA evidence. Principal features of the transformation series for the mandibles included development of a densely setose basal face; wide quadridentate retinaculum; a lengthened incisor tooth; a multidentate cerebra (one to five teeth; two-three most frequent), followed by subsequent loss of one or more such teeth; development of a diastema in the occlusal surface; development and subsequent loss of scrobal setae, and reduction and loss of the scrobe. Principal features of the transformation series for the labrum included evolution of form from transverse, sub-rectangular to elongate almost square, to triangular; position and number of setae evolved from dorsal to insertion on the apical margin, the number increased from 8-10 to as many as 36, and decreased to as few as four. The epipharynx broadened evolutionarily, the pedium evolving in form from narrow, triangular and nearly flat, to broad, palatiform, and markedly convex; anterior parapedial setae both increased and decreased in number, and in orientation, from a row parallel to the parapedial ridge to a setal row extended forward at about a right angle to the latter.
    Subjects: Nebriitae, Carabitae, Carabidae, Mouthparts, Cicindelitae, Pre-oral mill, Comparative morphology, Trachypachidae, Evolution, Coleoptera
    Date Created: 2011
  8. Heavy metals, especially lead, deposition recorded in an ombrotrophic peat bog near Manchester, United Kingdom [Download]

    Title: Heavy metals, especially lead, deposition recorded in an ombrotrophic peat bog near Manchester, United Kingdom
    Creator: Le Roux, G.
    Subjects: Peat bogs, Heavy metals, Lead
    Date Created: 2003
  9. Conservation of forest-dwelling arthropod species: simultaneous management of many small and heterogeneous risks [Download]

    Title: Conservation of forest-dwelling arthropod species: simultaneous management of many small and heterogeneous risks
    Creator: Spence, J. R.
    Description: The Canadian insect fauna is too inadequately Understood to support well-informed assessments about its conservation status: however, the foregoing collection of synthetic papers illustrates potential threats front industrial forestry. Loss of forest species and dramatic changes in forest insect assemblages driven by forestry activities are well illustrated by studies front places where industrial forest management has been more intensive or of longer duration. Improved Understanding of how arthropod species are coupled to habitats, especially microhabitats. appears to be central to progress toward their conservation. Studies of arthropods conducted at the species level are most relevant for applied conservation purposes. because only species-level work that is well documented with voucher specimens provides adequate comparative data to document faunal change. Although taxonomic infrastructure required to support such work is seriously under-resourced in Canada, entomologists can help themselves by producing useful modern resources for species identification, by Undertaking collaborative biodiversity work that minimizes the split between taxonomists and ecologists. and by supporting incentives for work at the species level. Securing the future of arthropod diversity ill Canadian forests through effective policy will require Sound regionally defined bases for whole-fauna conservation that mesh with broader land-Use planning. Building, these will require a practical Understanding of how \"ecosite-classification systems relate to arthropod diversity, accurate inventories of the predisturbance forest fauna in all regions, and development of sound monitoring plans designed to both detect faunal change efficiently and identify its drivers. such monitoring plans should include both baseline inventories and monitoring, of designated control areas. In addition, ef fective biomonitoring efforts will facilitate the development of suites of arthropod indicators, accommodate both seasonal (especially phenological) and annual variation, clarify the relationship between cost-effective samples and reality, and ensure adequate consideration of \"rare\" species. Return oil investment in monitoring, will depend Oil effective preplanned linkage to policy development that call respond to drivels of faunal change in a way that effectively addresses undesired changes.
    Subjects: Carabid beetles, Boreal forests, Beetle assemblages coleoptera, Extinction debt, Habitat fragmentation, Natural disturbance, Western Canada, Fire residuals, Indicators, Integrating biodiversity
    Date Created: 2008
  10. Landscape patterns of species-level association between ground-beetles and overstory trees in boreal forests of western Canada (Coleoptera, Carabidae) [Download]

    Title: Landscape patterns of species-level association between ground-beetles and overstory trees in boreal forests of western Canada (Coleoptera, Carabidae)
    Creator: Bergeron, J. A. C.
    Description: Abstract: Spatial associations between species of trees and ground-beetles (Coleoptera: Carabidae) involve many indirect ecological processes, likely reflecting the function of numerous forest ecosystem components. Describing and quantifying these associations at the landscape scale is basic to the development of a surrogate-based framework for biodiversity monitoring and conservation. In this study, we used a systematic sampling grid covering 84 km(2) of boreal mixedwood forest to characterize the ground-beetle assemblage associated with each tree species occurring on this landscape. Projecting the distribution of relative basal area of each tree species on the beetle ordination diagram suggests that the carabid community is structured by the same environmental factors that affects the distribution of trees, or perhaps even by trees per se. Interestingly beetle species are associated with tree species of the same rank order of abundance on this landscape, suggesting that conservation of less abundant trees will concomitantly foster conservation of less abundant beetle species. Landscape patterns of association described here are based on characteristics that can be directly linked to provincial forest inventories, providing a basis that is already available for use of tree species as biodiversity surrogates in boreal forest land management.
    Subjects: Biodiversity surrogates, Regional conservation, Forest canopy mosaic, Landscape ecology, Trees, Carabidae
    Date Created: 2011