Minnesota Cooperative Fish & Wildlife Research Unit
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Browsing Minnesota Cooperative Fish & Wildlife Research Unit by Author "Boal, Clint W"
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Item FACTORS AFFECTING DISTRIBUTION AND DETECTION OF BOREAL CHORUS FROGS (Pseudacris maculata) AND WOOD FROGS (Rana sylvatica) AT CAPE CHURCHILL, MANITOBA(2006) Mannan, Nicholas R; Perry, Gad; Andersen, David E; Boal, Clint WItem HOME RANGE AND HABITAT USE OF NORTHERN GOSHAWKS (Accipiter gentilis) IN MINNESOTA(2001-04) Boal, Clint W; Andersen, David E; Kennedy, Patricia LItem Microhabitat Characteristics of Lapland Longspur, Calcarius lapponicus, Nests at Cape Churchill, Manitoba(2005) Boal, Clint W; Andersen, David EWe examined microsite characteristics at 21 Lapland Longspur (Ca/carius /apponicus) nests and land cover types in which they occUlTed in Wapusk National Parle. Cape Churchill, Manitoba. Nests were located in four of six physiographic-vegetation land-cover types. Regardless of land-cover type. all but one nest was built on a pressure ridge or mound. Nests were built midway between the bottom and top of ridges or mounds with steeper slopes than was randomly available. Longspur nests had a distinctive southwest orientation (P < 0.(01). Longspurs selected nest sites that consisted of comparatively greater amounts of shrub species and lesser amounts of moss than were randomly available. Nests were generally well concealed by vegetation(mean =67.0%) and concealment was negatively associated with amount of graminoid species at the nest (P =0.0005). Our nesting habitat data may facilitate a better understanding of breeding Lapland Longspur habitat requirements, andItem Pilot Study of Boreal Chorus Frog and Wood Frog Distribution and Aquatic Habitat Conditions in Cape Churchill, Manitoba(2003) Boal, Clint W; Andersen, David EItem Species Composition, Distribution, and Habitat Associations of Anurans in a Subarctic Tundra Landscape Near Cape Churchill, Manitoba, Canada(2006) Reiter, Matthew E; Boal, Clint W; Andersen, David EDistribution, abundance, and habitat relationships of anurans that inhabit subarctic regions are poorly understood, and anuran monitoring protocols developed for temperate regions may not be applicable across large roadless areas of northern landscapes. In addition, arctic and subarctic regions of North America are predicted to experience changes in climate and, in some areas, recently have experienced habitat alteration due to high rates of herbivory by breeding and migrating waterfowl. To better understand subarctic anuran abundance, distribution, and habitat associations, we conducted anuran calling surveys in the Cape Churchill region of Wapusk National Park, Manitoba in 2004 and 2005. We conducted surveys along ~1-km transects distributed across 3 landscape types (coastal tundra, interior sedge meadow/ tundra, and boreal forest/ tundra interface) and estimated the probability of detection and density of Boreal Chorus Frogs (Pseudacris maculata) and Wood Frogs (Rana sylvatica). We detected a Wood Frog or Boreal Chorus Frog on 22 (87%) of 26 transects surveyed, and probability of detection varied between years and species and among landscape types. Estimated density of both species increased from the coastal zone inland toward the boreal forest edge. Our results suggest that anurans occur across a wide range of habitats in this subarctic tundra landscape, that there are spatial patterns in anuran abundance, and that considerations for both spatial and temporal variation need to be incorporated into surveys for subarctic anurans.Item Wood Frog and Boreal Chorus Frog Distribution and Habitat Associations in Wapusk National Park, Cape Churchill, Manitoba: 2004 Summary Report(2004-12) Boal, Clint W; Andersen, David E; Reiter, Matthew E; Reichert, BrianItem Wood Frog and Boreal Chorus Frog Distribution and Habitat Associations in Wapusk National Park, Cape Churchill, Manitoba: 2005 Summary Report(2005-11) Andersen, David E; Boal, Clint W; Reiter, Matthew E