A5019870560- Ecology and Vegetation Dynamics Studies
- Wildlife Ecology and Conservation
- Forest Ecology and Biodiversity Studies
- Animal Ecology and Behavior Studies
- Fire effects on ecosystems
- Forest Management and Policy
- Species Distribution and Climate Change
- Plant and animal studies
- Evolution and Paleontology Studies
- Forest Insect Ecology and Management
- Rangeland and Wildlife Management
- Bat Biology and Ecology Studies
- Forest ecology and management
- Conservation, Biodiversity, and Resource Management
- Remote Sensing in Agriculture
- Forest Biomass Utilization and Management
- Plant Water Relations and Carbon Dynamics
- Wildlife-Road Interactions and Conservation
- Mycorrhizal Fungi and Plant Interactions
- Genetic diversity and population structure
- Primate Behavior and Ecology
- Remote Sensing and LiDAR Applications
- Tree-ring climate responses
- Diptera species taxonomy and behavior
- Climate Change and Environmental Impact
University of Toronto
2013-2024
World Wildlife Fund
2016
University of Nebraska–Lincoln
2005
University of Guelph
2000
Conservation International
2000
National Institute of Amazonian Research
1999-2000
Museum of Vertebrate Zoology
2000
Queen's University
1992-1994
University of Florida
1988-1992
Smithsonian Institution
1980
Biodiversity loss from deforestation may be partly offset by the expansion of secondary forests and plantation forestry in tropics. However, our current knowledge value these habitats for biodiversity conservation is limited to very few taxa, many studies are severely confounded methodological shortcomings. We examined tropical primary, secondary, 15 taxonomic groups using a robust replicated sample design that minimized edge effects. Different taxa varied markedly their response patterns...
Abstract: Global warming is a key threat to biodiversity, but few researchers have assessed the magnitude of this at global scale. We used major vegetation types (biomes) as proxies for natural habitats and, based on projected future biome distributions under doubled‐CO 2 climates, calculated changes in habitat areas and associated extinctions endemic plant vertebrate species biodiversity hotspots. Because numerous uncertainties approach, we undertook sensitivity analysis multiple factors...
Abstract The identification of high‐performance indicator taxa that combine practical feasibility and ecological value requires an understanding the costs benefits surveying different taxa. We present a generic novel framework for identifying such taxa, illustrate our approach using large‐scale assessment 14 higher across three forest types in Brazilian Amazon, estimating both standardized survey cost biodiversity each taxon. Survey varied by orders magnitude, dung beetles birds were...
We describe the nonvolant mammal fauna of Rio Juruá western Amazon Brazil, based on collections made during a year-long survey river. We, along with our colleagues Drs. Claude Gascon and Carlos Peres, designed field project to examine effects river differentiation among terrestrial vertebrates (mammals, birds, amphibians reptiles) at both community population levels. This monograph examines only patterns geographic variation structure small-bodied mammals. Species inventories were 16 primary...
Current descriptive models of edge effects describe little more than the relationship between perimeter and area. A realistic model, one that incorporates additive nature effects, is presented tested. The total effect at a location within patch modelled as sum points along edges patch, weighted by distances from to location. At four sites in central Amazon °80 km north Manaus, Brazil, I measured vertical stratification foliage three primary forest habitats: (1) continuous close linear edges,...
Much of Canada’s terrestrial biodiversity is supported by boreal forests. Natural resource development in forests poses risks to this biodiversity. This paper reviews the scientific literature assess effects natural on Canadian We address four questions: (1) To what extent have changed due development? (2) How has responded these changes? (3) Will second-growth converge with that primary forests? (4) Are we losing species from focus trees, understory plants, insects, fungi, selected mammals,...
Aim Greenhouse‐induced warming and resulting shifts in climatic zones may exceed the migration capabilities of some species. We used fourteen combinations General Circulation Models (GCMs) Global Vegetation (GVMs) to investigate possible rates required under CO 2 ‐doubled forcing. Location Global. Methods Migration distances were calculated between grid cells future biome type x nearest same‐biome‐type current climate. In `base‐case' calculations, we assumed that × climate forcing would...
Rivers have been suggested to played an important role in shaping present-day patterns of ecological and genetic variation among Amazonian species communities. Recent molecular studies provided mixed support for the hypothesis that large lowland rivers functioned as significant impediments gene flow populations neotropical species. To date, no study has systematically evaluated impact riverine barriers might on structuring whole Our analyses phylogeography frogs small mammals indicate a...
Sequence variation in the mitochondrial cytochrome b gene was examined arboreal spiny rat, Mesomys hispidus, collected at 15 sites along Rio Juruá western Amazonia, Brazil, to determine importance of riverine barriers diversification this taxon. Twenty individual haplotypes were uncovered, most which unique single localities but some shared among adjacent either or across river. Genealogical analyses suggest that flow is limited and, combination with distribution haplotypes, populations...
Abstract There is now unequivocal evidence for global climate change; however, its potential impacts on evolutionary processes remain unclear. Many species have responded to contemporary change through shifts in their geographic range. This could lead increased sympatry between recently diverged species; likely increasing the hybridization. Recently, following a series of warm winters, southern flying squirrels ( Glaucomys volans ) Ontario, Canada rapidly expanded northern range limit...
Legally recognized Indian reserves of Brazilian Amazonia span over 100 million ha largely intact forest and are potentially valuable for biodiversity conservation. An important example is provided by the Kayapó territories which more than 13 in Pará Mato Grosso, Brazil, protect a unique vulnerable Amazonian type that poorly represented existing nature reserves. The southern have stopped invasion their lands most perverse threats to forests, but they become involved extensively sale illegal...
Despite increasing pressure to harvest timber from African tropical forests, the short- and long-term ecological effects of qualitative quantitative variation in extraction practices rarely have been examined. At a site southwestern Central Republic, we surveyed rodent tree communities vegetation structure unlogged forest along skid trails secondary primary access roads at 12 19 years after logging. The most important source among transects was type logging road: showed greatest change...
Previous studies in tropical rain forests suggest that most small mammal species reach their highest densities disturbed habitats; however, only a few sites have been examined. Consequently, habitat and resource use for many is poorly understood. This especially true the Amazon Basin, where no of microhabitat associations mammals undertaken. We studied relationships with variables abundances 5 marsupials 9 rodents at site southeastern Amazonia. Small were sampled traps placed both on ground...
Abstract: Although extensive areas of tropical forest are selectively logged each year, the responses bat communities to this form disturbance have rarely been examined. Our objectives were (1) compare abundance, species composition, and feeding guild structure between unlogged low‐intensity (1–4 stems/ha) sampling grids in southeastern Amazon (2) examine correlations logging‐induced changes structure. We captured bats understory canopy mist nets set five 1‐ha study both forest. 996...
Differential habitat use and intraguild competition are both thought to be important drivers of animal population sizes distributions. Habitat associations for individual species well-established, interactions between particular pairs have been highlighted in many focal studies. However, community-wide assessments the relative strengths these two factors not conducted. We built multi-scale occupancy models five carnivore taxa New York's Adirondack landscape assessed performance against ones...
Journal Article Comparative Abundances of Neotropical Small Mammals by Trap Height Get access Jay R. Malcolm Department Wildlife and Range Sciences, School Forest Resources Conservation, University Florida, Gainesville, FL 32611 Search for other works this author on: Oxford Academic Google Scholar Mammalogy, Volume 72, Issue 1, 13 February 1991, Pages 188–191, https://doi.org/10.2307/1381995 Published: 1991 history Received: 15 September 1989 Accepted: 07 March 1990