A Population of Taphromysis louisianae (Banner); (Crustacea: Mysidae) in a Clermont County Ohio River Wetland

Author Institution: Department of Biological and Environmental Sciences, Morehead State UniversityA reproducing population of Taphromysis louisianae was found in a shallow freshwater tributary of the Ohio River in Clermont County, OH throughout 1990-91. The nearest distribution record is in Louisiana. Therefore, this is the first record of this normally brackish water species in the Ohio River Basin. Analysis of habitat reveals that the population prefers shallow water (< 1 m) with leafy, high organic matter (about 8% of the soil dry weight) substrate. At the Ohio discovery site salinity was below limits of detection; the average pH was 6.5, and the mean dissolved oxygen concentration was 10 mg I1. This is in contrast to the higher salinity habitat of this species in bays and ditches of tidal areas. Because of distance and physiochemical disparities between the Gulf Coast and Ohio habitats, it is suggested that the isolated inland population exhibits characteristics of the early stages of speciation

Holocene Biogeochemical and Pollen History of a Lake Erie, Ohio, Coastal Wetland

Author Institution: Department of Biological and Environmental Sciences, Morehead State University and Byrd Polar Research Center, The Ohio State UniversityA five meter sediment core was taken from Old Woman Creek National Estuarine Research Reserve and State Natural Area and Preserve along the western basin of Lake Erie, U.S.A., to determine the historical biogeochemistry of the wetland. Analysis of pollen and sediment chemistry revealed that the area has remained a wetland since ca. 5,500 yr BP, despite changing lake levels. Pollen stratigraphy indicates a distinctive local succession, which has been divided into three zones. Sediments from sometime after glaciation to 5,500 yr BP were characterized by low concentrations of herb pollen; the next zone showed an establishment of hardwood forest vegetation. The modern local vegetation developed after deforestation (about 200 years ago), when sedimentation increased an order of magnitude, phosphorus deposition increased, and the ecosystem changed from a macrophyte dominated wetland to a plankton dominated marsh. After European settlement, the wetland retained its ability to act as a sink and biotic transformer of bioavailable phosphorus; however, abiotic processes seemed to be more important than the biotic transformations that dominated before deforestation

Knik Arm Crossing: The Economic Impact on Anchorage

Prepared for Department of Community Planning Municipality of AnchorageYe

Population Dynamics and School Enrollment Change

Prepared for Alaska Department of EducationYe

Statewide and Census Division Demographic and Economic Systems, Navarin Basin (Sale 83) Impact Analysis

This study examines economic and population impacts of the proposed Outer Continental Shelf (OCS) petroleum development of the Navarin Basin (Sale 83). The study begins with historical baseline analyses of the population and economies of the State of Alaska and the Aleutian Islands. Next, base case projections of conditions in the absence of OCS development are proposed. Subsequently, the impacts of OCS development are examined. The projections were done using the MAP and SCIMP models developed at the University of Alaska's Institute of Social and Economic Research. In the base case, statewide population increases to over 590 thousand by the year 2010. In the 1.2 Bbbl oil discovery case, the maximum percentage impact upon statewide population is 3 percent, or 16,800, in 1993. The Aleutian Islands' base case resident population is predicted to rise from 3,654 in 1980 to 8,348 in 2000 due to growth in the bottomfish industry. The maximum increase in population is 281, or 4 percent, in 1996. The maximum impact upon Aleutian Islands' resident employment is 12 percent (291) in 1996. The maximum impact upon Aleutian Islands' nonresident or enclave employment is 45 percent (770) in 1989 during the construction of OCS facilities.Prepared for Bureau of Land Management Alaska Outer Continental Shelf OfficeYe

Materials Examination of the Vertical Stabilizer from American Airlines Flight 587

The first in-flight failure of a primary structural component made from composite material on a commercial airplane led to the crash of American Airlines Flight 587. As part of the National Transportation Safety Board investigation of the accident, the composite materials of the vertical stabilizer were tested, microstructure was analyzed, and fractured composite lugs that attached the vertical stabilizer to the aircraft tail were examined. In this paper the materials testing and analysis is presented, composite fractures are described, and the resulting clues to the failure events are discussed

The ISER MAP Economic Database Data Sources and Derivations A Companion to the Printed Tables

Ye

Gulf of Alaska Economic and Demographic Systems Analysis

This report examines possible impacts of the Gulf of Alaska lease offering, scheduled for October of 1984, upon the population and economics of five communities in southcentral Alaska: Homer, Kenai, Kodiak, Seward, and Yakutat. For each community we provide descriptions of current populations and employment. We then use the Rural Alaska Model ("RAM" model) to project a number of economic and demographic variables for these five communities with and without development of the proposed lease sale area. These projections are sensitive to the numerous assumptions required by the model. In the base case, we project relatively low rates of growth in resident population for Kenai and Kodiak (less than 1.2 percent annually over the period 1981-2010); we project a moderate growth rate for Yakutat (1.9 percent annually over the period , with most growth occurring before 1990); and we project high rates of growth for Homer and Seward (2.3 percent and 3.6 percent) due to increased tourism, fish processing, and shipbuilding. We project relativity minor impacts from development in the lease sale area upon population and employment in Homer, Kenai, Kodiak, and Seward (generally less than 10 percent at maximum). In contrast, we project more substantial relative impacts upon population and employment in Yakutat (up to 46 percent and 82 percent, respectively). Although absolute impacts are similar in Yakutat to those in the other communities, relative impacts are greater because Yakutat is much smaller.Prepared for Minerals management service Alaska OCS officeYe