The American Midland Naturalist

Articles from Vol. 141, No. 1, January

Avian Communities and Habitat Relationships in South Carolina Piedmont Beaver Ponds
ABSTRACT.-Beaver ponds are a widely distributed and abundant wetland resource in the southeastern United States, but their value as avian habitat is poorly documented. We sampled bird populations at six South Carolina Piedmont beaver ponds from April...
Bird Communities in Riparian Buffer Strips of Industrial Forests
ABSTRACT-Retention of riparian buffers is a common management practice used to protect streams from the effects of upslope forest harvest. We compared bird use of riparian buffers along main stem rivers, tributary streams, and reference riparian zones...
Colonization of Bedrock by Freshwater Mussels (Bivalvia: Unionidae)
ABSTRACT.-We document the occurrence of freshwater mussels living on bedrock, a substrate generally considered to be unsuitable. We found 54 individuals of six species in this habitat. Our observations support the hypothesis that substrate stability...
Combustion Characteristics of Bison (Bison Bison) Fecal Pats Ignited by Grassland Fires
ABSTRACT.-We quantified the combustion characteristics of bison fecal pats following three prescribed grassland fires conducted during three different seasons on an Oklahoma tallgrass prairie. We compared heat per unit area, rate of energy consumption...
Composition of the Helminth Community of a Montane Population of the Side-Blotched Lizard, Uta Stansburiana (Phrynosomatidae) from Los Angeles County, California
ABSTRACT.-Six hundred sixty-three Uta stansburiana from the San Gabriel Mountains, Los Angeles County, California collected at monthly intervals from February 1974 to January 1975 were examined for helminths. One species of cestode, Ooc*onstica macallisteri,...
Does Flower Color Change in Aster Vimineus Cue Pollinators?
ABSTRACT.-Flower color change, floral rewards, and the size of a floral display in relation to pollinator attraction were studied in Aster vimineus. The center disk florets of A. vimineus are either all yellow or all red in a given flower. We determined...
Effects of Cattle Grazing on Salt Desert Rodent Communities
ABSTRACT-Cattle grazing has been shown to alter various features of desert communities that may impact microhabitats required by various species of desert rodents, with unknown implications for desert rodent communities. \Ve conducted a series of studies...
Effects of Fire, Browsers and Gallers on New Jersey Tea (Ceanothus Herbaceous) Growth and Reproduction
ABSTRACT.-Woody plant species in grassland ecosystems can be subjected to damage from fire and multiple herbivore species, but interactions between fire and galling (by Periploca ceanothiella, Lepidoptera: Cosmopterigidae), deer browsing (Odocoilius...
Effects of Fire, Competition and Soil Disturbances on Regeneration of a Carnivorous Plant (Drosera Capillaris)
ABSTRACT-Although chronically low soil fertility is widely recognized as an important selection pressure on carnivorous plants, the effects of other potentially important selection pressures, such as natural disturbances, have largely been ignored. In...
Forest Colonization and Developmental Growth of the Invasive Shrub Lonicera Maackii
ABSTRACT.-The invasive shrub Lonicera maackii (Rupr.) Herder (Amur honeysuckle) dominates the understory of many deciduous forests in southwestern Ohio and other areas. Extensive sampling of an isolated population of L. maackii was used to elucidate...
Forest Fragments in East-Central Illinois: Islands or Habitat Patches for Mammals?
ABSTRACT.-Te surveyed the nonvolant mammals in 10 forest fragments embedded in a matrix of row crop agriculture in east-central Illinois to assess the impact of forest fragmentation on mammalian diversity and distributions. A total of 19 species were...
Growth Rates and Intraspecific Variation in Body Weights of Raccoons (Procyon Lotor) in Southern Texas
ABSTRACT.-We estimated growth rates and sex and age-specific seasonal weight fluctuations for raccoons (Procyon lotor) in San Patricio Co., Texas. During 1990-1992 we recorded 248 weights for 167 raccoons. Growth rate parameters for raccoons <2-years-old...
Growth Responses of Carya Ovata (Juglandaceae) Seedlings to Experimental Sun Patches
ABSTRACT.-The heterogenous structure of eastern deciduous forest canopies creates an understory light continuum ranging from deep shade to extended periods of direct solar irradiance below large canopy gaps. We designed an experiment to explore how shagbark...
Home Ranges, Habitat Selection and Mortality of Ring-Necked Pheasants (Phasianus Colchicus) in North-Central Maryland
ABsTR.,CT.-Between 4 January and 15 May 1988, we captured 16 female and 10 male ringnecked pheasants (Phasianus colchicus) in north-central Maryland at the southern edge of their North American range and fitted them with radiotransmitters. We monitored...
Host Fishes and Host-Attracting Behavior of Lampsilis Altilis and Villosa Vibex (Bivalvia: Unionidae)
ABSTRACT.-Suitable host fishes were identified for two species of freshwater mussels (Unionidae) from the Coosa River drainage, Mobile Basin: Lampsilis altilis, the fine-lined pocketbook and Villosa vibex, the southern rainbow. Suitable hosts are defined...
Influences of Frequent Cool-Season Burning across a Soil Moisture Gradient on Oak Community Structure in Longleaf Pine Ecosystems
ABSTRACT.-Fire and soil moisture gradients are thought to influence oak community structure in longleaf pine (Pinus palustris Mill.) woodlands. To explore these influences, we measured oak density and species composition within a longleaf pine-wiregrass...
"Paedocannibal" Morph Barred Tiger Salamanders (Ambystoma Tigrinum Mavortium) from Eastern South Dakota
ABSTRACT.-We report characteristics of a previously unknown population of Amnystoma tigrimon mavortium (barred tiger salamander) from eastern South Dakota, a location that extends the formerly known range of this subspecies about 150 km north. This population...
Plant Succession on Pumice at Mount St. Helens, Washington
ABSTRACT.-How vegetation develops from a source of potential species remains poorly understood. I explored whether colonizing species assemble randomly, or if local deterministic factors alter species establishment to create consistent vegetation patterns....
Reproduction by Individuals of a Nonreproducing Population of Megalonaias Nervosa (Mollusca: Unionidae) Following Translocation
ABSTRACT.-Reproduiction of Megolonaias nervosa (Rafinesqtie, 1820) has not been documerited for over 20 y in much of the Cumberland River where water temperatures have decreased and flow regimes have been greatly altered by hypoliunetic discharges from...
Size-Biased Mortality Due to Predation in a Nesting Freshwater Turtle, Trachemys Scripta
ABSTRACT.-Differential survivorship within or between stages is an important component of most explanations of turtle reproductive patterns. We tested the null hypothesis that a sample of adult female Trachemys scripta found killed by predators was a...
The Lazarus Effect: Rejuvenation of Leaf-Senescent Seedlings in a Rare Grassland Perennial
ABSTRACT.-Over 75% of the seedlings of the endemic sandplain grassland perennial, northern blazing star (Liatris scariosa var novae-ang/iae), die within their first growing season. During a study of the reproductive ecology of this rare plant, we found...