Barnwell County Research Articles

The interrelationships among plant biomass, plant surface area and the interception of particulate deposition by grasses.

The interrelationships among plant biomass, plant surface area and interception fraction were determined for the interception by corn of 238Pu-bearing particles released to the atmosphere from the H-Area nuclear fuels chemical separations facility on the U.S. Department of Energy's Savannah River Plant in Barnwell County, South Carolina. The relationship between interception fraction and corn biomass was accurately approximated by a filtration model with an absorption coefficient of 3.60 m2 kg-1. A filtration model with an absorption coefficient of 2.91 m2 kg-1 accurately approximated the relationship between biomass and interception fraction for data compiled from the literature for a variety of grass species. A linear regression model accurately approximated the relationship between interception fraction and surface area, but was not a better predictor of interception fraction than the filtration model for biomass.

Dicyrtoma (Ptenothrix) renateae, New Species from the Savannah River Plant and Georgia (Collembola: Dicyrtominae)

A new species, Dicyrtoma (Ptenothrix) renateae Snider, is described from South Carolina and Georgia. While sharing unique characteristics with Dicyrtoma (Ptenothrix) vittata (Folsom), D. renateae can be identified on the basis of: smooth circumanal setae, corpus of tenaculum with 5-6 setulae, circumanal seta G present, seta DD spinelike, and its color pattern. The type locality is Barnwell County, South Carolina, Savannah River Plant. Specimens taken from litter and grass.

Sminthurus bivittatus, New Species from the Southeastern United States (Collembola: Sminthuridae)

A new species, Sminthurus (Sminthurus) bivittatus Snider, is described from the Savannah River Plant, Aiken, South Carolina, Florida and central Georgia. The species is closely related to Sminthurus butcheri Snider, Sminthurus fitchi Folsom and Sminthurus packardi Folsom. It can be separated from those three species on the basis of color pattern, position of collophore seta, presence of outer mucronal teeth, absence of subapical papilla on ANT.IV, and smooth, normal P seta of bothriotrix D complex. This species is commonly taken with Sminthurus carolinensis Snider in grass sweepings. The type locality is Barnwell County, South Carolina.

New Species of Taeniopteryx (Plecoptera: Taeniopterygidae) from South Carolina

Taeniopteryx robinae, sp. nov., is described from Barnwell County, S.C. It is closely related to the T. maura (Pictet) species complex and characters are given to distinguish it from the complex. Ecological details of the type locality are discussed and a key to adult males of South Carolina Taeniopteryx is also given.

Effect of Cultivation on Emergence of Eye Gnats (Hippelates spp.) in South Carolina1

Two experiments using 10 field plots in Barnwell County, S. C., were conducted to determine the effect of cultivation on emergence of eye gnats. In Experiment 1, 2247 Hippelates were trapped on plowed and 17 Hippelates on unplowed plots. In Experiment 2, 1761 Hippelates were trapped on plowed and 74 on unplowed plots. The same 4 species were trapped in both experiments. They were H. pusio Loew, H. pusio variant, H. bishoppi Sabrosky, and H. dissidens (Tucker). The numbers of each species trapped of Hippelates , except H. dissidens in Experiment 2, increased significantly as a result of plowing.