The American Midland Naturalist

Articles from Vol. 149, No. 2, April

Damage Induced Production of Extrafloral Nectaries in Native and Invasive Seedlings of Chinese Tallow Tree (Sapium Sebiferum)
ABSTRACT.-We conducted a pot experiment examining the effects of simulated leaf herbivory and supplemental soil nutrients on extrafloral nectary (EFN) glands of Sapium sebiferum seedlings derived from native Chinese and invasive Texas seed stock. We...
Do Behavioral Interactions between Salamanders and Beetles Indicate a Guild Relationship?
ABSTRACT.-Guilds consist of groups of species that use mutual resources or collections of overlapping resources. Guilds are often comprised of members of the same family or genus, but they can span larger taxonomic categories. Predacious arthropods,...
Effects of Burning and Discing Conservation Reserve Program Fields to Improve Habitat Quality for Northern Bobwhite (Colinus Virginianus)
ABSTRACT.-Since 1985 considerable expanses of highly credible cropland have been enrolled in the Conservation Reserve Program (CRP). Areas enrolled in CRP provide wildlife habitat; however, habitat quality and specific resources on these sites vary in...
Effects of Wildfire on Recruitment of Fraxinus Pennsylvanica in Eastern Montana Woodlands
ABSTRACT:-Fraxinus pennsylvanica woodlands are an important component of the Northern Great Plains ecosystem and critical habitat for many species of birds, mammals and plants. Many F. pennsylvanica woodlands are decadent, declining from closed-canopy...
Evidence Supporting Two New Forms and One Previously Described Race within the Cottus Carolinae Species-Complex from the Ozark Highlands
I present preliminary data describing two new forms within the Cottus carolinae species-complex from the Ozark Highlands, the eyelash sculpin and the fringe-head sculpin. The eyelash and fringe-head sculpins can be diagnosed from all other species of...
Fire and Shade Effects on Ground Cover Structure in Kirtland's Warbler Habitat
ABSTRACT.-Researchers and managers have suggested that a narrow range of ground-cover structure resulting from fire might be necessary for suitable Kirtland's warbler nesting conditions. Yet, Kirtland's warblers have bred successfully in numerous unburned...
Geographic Distribution and Dispersal Mechanisms of Bouteloua Curtipendula in the Appalachian Mountains
ABSTRACT.-The distribution of Bouteloua curtipendula in the eastern United States is generally limited to small and isolated populations on limestone-derived valley soils within the Ridge and Valley Physiographic Province in the Appalachian Mountains....
Influence of White-Tailed Deer Digestion on Running Buffalo Clover (Trifolium Stoloniferum: Fabaceae Muhl. Ex A. Eaton) Germination
ABSTRACT.-We compared the germination rates of running buffalo clover (Trifolium stoloniferum) seeds that had been passed through the digestive tract of a captive white-tailed deer (Odocoileus virginianus) with those that had not. We found no significant...
Linear and Nonlinear Effects of Habitat Structure on Composition and Abundance in the Macroinvertebrate Community of a Large River
ABSTRACT.-We used an experiment and regression analyses to quantify effects of spatial variation in habitat structure abundance on a riverine macroinvertebrate community under winter conditions. Concrete slabs (0.21 m^sup 2^; n = 24) with different numbers...
Measuring Edge Effects on Nest Predation in Forest Fragments: Do Finch and Quail Eggs Tell Different Stories?
ABSTRACT.-Experiments assessing rates of avian nest predation often find that nests near forest edges are at high risk of predation, suggesting the importance of forest fragmentation in recent population declines of ground-nesting passerines. However,...
Recovery of Populations of Goldenseal (Hydrastis Canadensis L.) and American Ginseng (Panax Quinquefolius L.) Following Harvest
ABSTRACT.-Goldenseal (Hydrastis canadensis L.) and American ginseng(Panax quinquefolius L.) have been harvested commercially for the past few centuries. Harvested populations can recover if vegetative propagules remain in the soil. Experiment I tested...
Reproduction Decreases Life Span in the Giant Waterbug (Belostoma Flumineum)
ABSTRACT.-Senescence is the result of age-specific trade-offs among life history traits. Energetic trade-offs among various components of an organism's energy budget can also affect an individual's life span. An increase in reproductive effort, for instance,...
Reproductive Ecology and Captive Breeding of the Threatened Niangua Darter Etheostoma Nianguae
ABSTRACT.-The Niangua darter Etheostoma nianguae is a threatened stream fish endemic to the Osage River basin of Missouri's Ozark uplands. We studied the darter's reproductive behavior under natural conditions in the wild to assist recovery efforts....
Rodent Communities in a Grazed and Ungrazed Arizona Grassland, and a Model of Habitat Relationships among Rodents in Southwestern Grass/shrublands
ABSTRACT.-We live-trapped rodents in 2000-2001 at eight sites on a 3160 ha grassland and mesquite-oak savanna in southeastern Arizona that had been ungrazed since 1968, and on eight paired sites on adjacent cattle ranches. There were 917 captures of...
Seasonal Use and Selection of Caves by the Eastern Pipistrelle Bat (Pipistrellus Subflavus)
ABSTRACT.-The eastern pipistrelle (Pipistrellus subflavus) is considered one of the most common and widely distributed species of bats in eastern North America, but little published information exists on its natural history. During surveys of numerous...
Space Use, Movements and Habitat Selection of Adult Bobcats (Lynx Rufus) in Central Mississippi
ABSTRACT.-Many factors influence: bobcat (Lynx rufus) space use, movements and habitat selection, including prey distribution and density, season, breeding behaviors and intraspecific relationships. Knowledge of ranging behaviors and habitat selection...
Temporal and Spatial Patterns in Root Nitrogen Concentration and Root Decomposition in Relation to Prescribed Fire
ABSTRACT.-This study examined the temporal and landscape-scale patterns of root nitrogen concentration [N], root decomposition and N release from decomposing roots in oak-hickory forest ecosystems in southern Ohio. Sampling was conducted in three watershed-scale...
Yolk Testosterone Levels Are Not Consistently Higher in the Eggs of Obligate Brood Parasites Than Their Hosts
ABSTRACT.-The survival of obligate brood parasitic nestlings depends on their ability to exploit hosts' parental care, mostly at the expense of the unrelated nestmates. Foster parents are characteristically manipulated by parasitic young through more...