The American Midland Naturalist

Articles from Vol. 152, No. 2, October

A 200-Year Fire History in a Remnant Oak Savanna in Southeastern Wisconsin
ABSTRACT.-In oak (Quercus) savannas in the Midwest region of the United States, fire continues to play a significant role in its persistence within the landscape; however, in southeastern Wisconsin, quantified fire history records are limited. This study...
A High-Severity Disturbance Event Alters Community and Ecosystem Properties in West Twin Creek, Olympic National Park, Washington, USA
ABSTRACT.-Debris flows are mass movements of sediment, wood and water down stream channels that profoundly impact streams and adjacent riparian areas and are a major erosion process in many steep mountainous terrains. Their impact on aquatic ecosystems,...
Applicability of Viewshed Analysis to Wildlife Population Estimation
ABSTRACT.-Population estimations and indices based on roadside or spotlight counts typically require investigators to determine the route with maximum viewing area and calculate area visible from the census route. Viewshed analysis may provide a simpler...
Concurrent Effects of Fire Regime, Grazing and Bison Wallowing on Tallgrass Prairie Vegetation
ABSTRACT.-We examined the effects of fire regime and bison activity on the plant communities of active bison wallows and the surrounding grazing lawns at Konza Prairie Biological Station in northeastern Kansas, USA. In both mid-June and late July the...
Differential Consumption of Eastern Red Cedar (Juniperus Virginiana) by Avian and Mammalian Guilds: Implications for Tree Invasion
ABSTRACT.-Increased abundance and distribution of eastern redcedar (Juniperus virginianus), a native species in the Great Plains, has been associated with changes in ecosystem functioning and landscape cover. Knowledge of the main consumers and dispersal...
Fecal Corticosteroid Levels in Free-Living Populations of Deer Mice (Peromyscus Maniculatus) and Southern Red-Backed Voles (Clethrionomys Gapperi)
ABSTRACT.-Fecal corticosteroid levels were monitored in free-living populations of deer mice (Peromyscus maniculalus) and southern red-backed voles (Clethrionomys gapperi) in NorthCentral Idaho. Sex, reproductive condition and age had no significant...
Geographic and Size-Related Variation in the Diet of Insular Populations of the Northern Watersnake
ABSTRACT.-I studied microgeographic and size-related variation in the diet composition of the Northern Watersnake Nerodia sipedon sipedon in the Beaver Archipelago of Lake Michigan. Snakes from Lake Michigan shoreline sites were piscivorous whereas snakes...
Gypsy Moth Defoliation of Oak Trees and a Positive Response of Red Maple and Black Cherry: An Example of Indirect Interaction
ABSTRACT.-We calculated relative growth rates of all species over 10 cm circumference at breast height from 1997-1999, 1999-2001 and 2001-2003 in a 70 by 100 m plot in an oak forest in southeastern Michigan. Red maple and black cherry represented most...
Habitat Characteristics of the Endangered Virginia Northern Flying Squirrel (Glaucomys Sabrinus Fuscus) in the Central Appalachian Mountains
ABSTRACT.-We compared 11 ecological variables thought to be important for assessing the habitat of the endangered Virginia northern flying squirrel (Glaucomys sabrinus fuscus) at 11 occupied and 9 unoccupied sites within northern hardwood-montane conifer...
Incidence of Florida Largemouth Bass Alleles in Two Northern Arkansas Populations of Largemouth Bass, Micropterus Salmoides Lacepede
ABSTRACT.-Florida largemouth bass (Micropterus salmoides floridanus) have been intensively stocked throughout the southern United States for the past three to four decades due to perceived superior growth characteristics. As a result, introgression of...
Influential Environmental Gradients and Spatiotemporal Patterns of Fish Assemblages in the Unimpounded Upper Mississippi River
ABSTRACT.-We investigated variation of fish assemblages in response to environmental factors using Long Term Resource Monitoring Program data. Data were collected from 1993 to 2000 from five physical habitats in the unimpounded upper Mississippi River....
Invasion of Chinese Tallow (Sapium Sebiferum) in the Lake Jackson Area, Northern Florida
ABSTRACT.-Chinese tallow (Sapium sebiferum) is an invasive tree in the southeastern United States that has been a management concern in Florida. We used observational and experimental approaches to explore factors influencing Chinese tallow invasion...
Mussel Assemblages in a Developing Oxbow and a Newly-Cut Channel of the Neosho River, Kansas
ABSTRACT.-We compared freshwater mussel assemblages (Bivalvia: Unionidae) in a developing oxbow (old channel) and a newly-cut (new) channel of the Neosho River, Kansas, during 2001. We sampled mussels at approximately 1.5 km intervals, totaling 19 sites...
Population Structure of the Endangered Mitchell's Satyr, Neonympha Mitchellii Mitchellii (French): Implications for Conservation
ABSTRACT.-Basic ignorance about the ecology and life history of the endangered Mitchell's satyr butterfly, Neonympha mitchellii mitchellii, is impeding conservation efforts. To assist with recovery, we examined Mitchell's satyr butterfly population structure...
Prey Preference and Diet of Neonate Eastern Massasaugas (Sistrurus C. Catenatus)
ABSTRACT.-Because prey acquisition in young organisms often has profound effects later in life, understanding the foraging ecology of early age classes is important. We examined diet and prey preference of neonate Eastern Massasaugas (Sistrurus c. catenatus)...
Recovery of Native Flora and Behavioral Responses by Galerucella Spp. Following Biocontrol of Purple Loosestrife
ABSTRACT.Goodyear Swamp Sanctuary, a wetland adjacent to Otsego Lake, Otsego County, New York, has been dominated by the invasive nonnative plant purple loosestrife (Lythrum salicaria L.) since 1975. In June 1997 a combined total of 100 adult Galerucella...
Roosevelt Elk Density and Social Segregation: Foraging Behavior and Females Avoiding Larger Groups of Males
ABSTRACT.-Intersexual social segregation at small spatial scales is prevalent in ruminants that are sexually dimorphic in body size. Explaining social segregation, however, from hypotheses of how intersexual size differences affects the foraging process...
Soil Quality Differences under Native Tallgrass Prairie across a Climosequence in Arkansas
ABSIRACT.-Climate, specifically moisture and temperature, influences plant growth and nutrient cycling; thns, climate also influences prairie development. Relatively little research has been conducted in the ecological transition zone between the Great...
Sources of Variation in Insect Density on Lupinus Arboreus Sims: Effects of Environment, Source Population and Plant Genotype
ABSTRACT.-Temporal and spatial variability in herbivory can be influenced by plant genotype, environmental conditions and their interactions. However, few studies correctly control for the relative influence of these factors. Here, I report results from...
Status of the Mussel Fauna of the Poteau River and Implications for Commercial Harvest
ABSTRACT.-The Poteau River, a major tributary of the Arkansas River, flows through the Ouachita Uplands of eastern Oklahoma and western Arkansas. The river has been harvested for mussels, historically by the Caddo Indians and recently for the pearl industry....
Ultimately, Too Many Human Animals, Wildlife, Conservation, and Human Welfare: A United States and Canadian Perspective
Ultimately, Too Many Human Animals, Wildlife, Conservation, and Human Welfare: A United States and Canadian Perspective, Richard D. Taber and Neu F. Payne, Krieger Publishing Company, 2003, ISBN 1-57524-061-0Overview.-The pervasive theme in this book...
White-Tailed Deer: Dispersers or Predators of American Ginseng Seeds?
ABSTRACT.-As a result of game management practices and alterations in habitat, white-tailed deer populations (Odocoileus virginianus Z.) have increased to all time highs within the last century. Large herd numbers are having negative impacts at multiple...