The American Midland Naturalist articles

Recent articles from The American Midland Naturalist

Nectar Plant Selection by the Karner Blue Butterfly (Lycaeides melissa samuelis) at the Indiana Dunes National Lakeshore.(Statistical Data Included)
July 1, 2000... RALPH GRUNDEL [1] ABSTRACT.--The Karner blue butterfly, Lycaeides melissa samuelis, is an endangered species residing in savanna and barrens habitats in the Midwest and Northeast United States. To improve our understanding of nectar plant selection patterns by the Karner blue, we examined...

Aggregating Behavior During Oviposition in the Dragonfly Sympetrum vicinum (Hagen) (Odonata: Libellulidae).(Statistical Data Included)
July 1, 2000... ABSTRACT.--This study examined the adaptive significance of ovipositing near conspecifics by pairs of the dragonfly Sympetrum vicinum. Studies were conducted at two artificial ponds in New York using a series of 1 [m.sup.2] plots along their shorelines. Although the majority of pairs...

Interspecific Competition in the Laboratory between Drosophila subobscura and D. azteca.
July 1, 2000... MARTA PASCUAL [1] ABSTRACT.--Drosophila subobscura and D. azteca are closely related species that have co-existed on the west coast of North America since that area was colonized by D. subobscura in the late 1970s. We have studied competition between the two species by the serial transfer...

Detecting Area Sensitivity: A Comment on Previous Studies.
July 1, 2000... ABSTRACT.--SEVERAL studies have reported that some grassland birds are area sensitive; they exhibit a nonrandom avoidance of small fields. The methods used to test for area sensitivity, however, differed among studies. Some investigators sampled fields with sampling effort proportional to...

Effects of the Exotic Invasive Shrub Lonicera maackii on the Survival and Fecundity of Three Species of Native Annuals.(Statistical Data Included)
July 1, 2000... DAVID L. GORCHOV [1] ABSTRACT.--Negative effects on native plant populations are often attributed to invasions by exotic plants, but experimental evidence is lacking to support many of these claims. Lonicera maackii, an exotic shrub with long leaf phenology, has become naturalized...