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Articles 11191 - 11220 of 12149

Full-Text Articles in Life Sciences

Atlas Of Wetlands In The Principal Coal Surface Mining Region Of Western Kentucky, William J. Mitsch, Jan R. Taylor, Kimberly B. Benson, Paul L. Hill Jr. Jul 1983

Atlas Of Wetlands In The Principal Coal Surface Mining Region Of Western Kentucky, William J. Mitsch, Jan R. Taylor, Kimberly B. Benson, Paul L. Hill Jr.

KWRRI Research Reports

This atlas contains maps of wetlands and surface mining activity in the Western Kentucky Coal Field, and focuses on a 3960 km2 (1530 mi2) region where approximately 90 percent of surface mining in the Coal field occures. Some present and potential competition exists between surface coal mining and wetland protection. A wetland classification, based on the recent FWS classification, includes six types of palustrine systems and one each of riverine and laucstrine systems. Wetlands and surface mines are located on twenty-seven 7.5 minute USGS quadrangles that define the study region. A total of 460 km2 (177 …


The Induction Of Tolerance To Heavy Metals In Natural And Laboratory Populations Of Fish, Wesley J. Birge, William H. Benson, Jeffrey A. Black Jun 1983

The Induction Of Tolerance To Heavy Metals In Natural And Laboratory Populations Of Fish, Wesley J. Birge, William H. Benson, Jeffrey A. Black

KWRRI Research Reports

Aquatic toxicity studies were performed on two natural populations of fathead minnows. One group of organisms was taken from a metal-contaminated flyash pond associated with a coal-fired power plant and the other group was collected from relatively uncontaminated hatchery ponds. Acute tests indicated that flyash pond fish were significantly more tolerant to cadmium and copper than were hatchery fish. At an exposure concentration of 6.0 mg Cd/L in moderately hard water, the median period of survival for flyash pond fish was 50.0 hr compared to 6.8 hr for hatchery fish. Both groups of organisms were about equally sensitive to zinc. …


Baseline Study For Monitoring Variations In Nitrate Concentration In Surface Waters Of Cuyamaca Rancho State Park In Relation To Watershed Types, Lester E. Harris Iii Jun 1983

Baseline Study For Monitoring Variations In Nitrate Concentration In Surface Waters Of Cuyamaca Rancho State Park In Relation To Watershed Types, Lester E. Harris Iii

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of this study was to compare the variations in nitrate concentration in the surface waters of five different watershed community types at Cuyamaca Rancho State Park. Monthly water samples were collected at selected sites below each watershed and analyzed by use of a specific ion electrode for nitrate concentration. Results indicate that variations in nitrate concentration are influenced by seasonal variation in rainfall. The yellow pine forest/chaparral watershed showed the highest mean nitrate concentration, three to four times higher than the other watershed types analyzed. Peak nitrate concentrations did not approach the maximum safe limit for human or …


The Prairie Naturalist Volume 15, No. 2. June 1983 Jun 1983

The Prairie Naturalist Volume 15, No. 2. June 1983

The Prairie Naturalist

Paul B. Kannowski, Editor

Douglas H. Johnson, Book Review Editor

TABLE OF CONTENTS

EFFECTS OF FIRE ON RODENTS IN TALLGRASS PRAIRIE OF THE FLINT HILLS REGION OF EASTERN KANSAS. D. W. Kaufman, G. A. Kaufman, and E. J. Finck

FECAL pH AND FOOD HABITS OF SYMPATRIC LAGOMORPHS IN TEXAS R. J. Warren

UNUSUAL PLANT ASSEMBLAGE IN WALSH COUNTY, NORTH DAKOTA ▪ B. Heidel

ADDITIONAL RECORDS OF PASSERINES FEEDING ON POPLAR GALLS, AND A POSSIBLE MECHANISM FOR SUMMER NOMADISM IN BOREAL FINCHES ▪ P. J. DuBowy

UPDATE ON THE AMERICAN BALD EAGLE, Haliaeetus leucocephalus L., IN NEBRASKA ▪ S. J. Rothenberger …


Annean Station Management Plan, A A. Mitchell May 1983

Annean Station Management Plan, A A. Mitchell

Resource management technical reports

Annean Station's carrying capacity has been estimated at 8,340 sheep on its 168,539 hectares. The halophyte pastures of Carnegie Land System were in good condition while those of Mileura Land System were in poor condition. The wandarrie pasture of the Belele Land System was in fair to poor condition. This system comnprises 34 per cent of Annean's area and is estimated as capable of presently carrying 2,900 stock.


Cameron B. Kepler's Review Of Janet Kear And A. J. Berger's The Hawaiian Goose: An Experiment In Conservation, Cameron B. Kepler Apr 1983

Cameron B. Kepler's Review Of Janet Kear And A. J. Berger's The Hawaiian Goose: An Experiment In Conservation, Cameron B. Kepler

Pacific Studies

No abstract provided.


Polychlorinated Biphenyl Levels In The Ocean Scallop (Placopecten Magellanicus) Gmelin From The Philadelphia Sewage Sludge Disposal Site, Guy Jeffrey Hall Apr 1983

Polychlorinated Biphenyl Levels In The Ocean Scallop (Placopecten Magellanicus) Gmelin From The Philadelphia Sewage Sludge Disposal Site, Guy Jeffrey Hall

OES Theses and Dissertations

Ocean Scallops (Placopecten magellanicus) were sampled from stations in and around the Philadelphia Disposal Site. Each sample was dissected and aliquots of adductor muscle and reproductive tissue were chemically extracted for Polychlorinated Biphenyls (PCBs). A perchlorinated procedure outlined by Diosady et al., 1972, Aromour, 1973 and Crist et al., 1977 was employed to increase detection levels and simplify quantitation of PCBs. PCB levels were reported in dry weight and lipid weight of both adductor muscle and reproductive tissue. Findings indicated residual levels or PCB/lipid weight increased as lipid levels decreased in both tissue types. Levels detected in all adductor muscle …


The Prairie Naturalist Volume 15, No. 1. March 1983 Mar 1983

The Prairie Naturalist Volume 15, No. 1. March 1983

The Prairie Naturalist

NUTRIENT POOL SIZE RELATIONS IN THE UNDERSTORY STRATA OF A NORTHERN GREAT PLAINS GALLERY FOREST ▪ K. T. Killingbeck

COMPARISON OF OLD FIELD SUCCESSION ON A TALLGRASS PRAIRIE AND A NEBRASKA SANDHILLS PRAIRIE ▪ M. L. Bomberger, S. L. Shields, A. T. Harrison and K. H. Keeler

MANIPULATION OF FLOOD MEADOW VEGETATION AND OBSERVATIONS ON SMALL MAMMAL POPULATIONS ▪ J. E. Cornely, C. M. Britton and F. A. Sneva

CANVASBACK INTRODUCTION IN WEST-CENTRAL MINNESOTA ▪ H. A. Doty

FORAGING BEHAVIOR AND WATER USE OF HORSES AND CATTLE IN THE WYOMING RED DESERT ▪ L. J. Krysl, G. E. Plumb, M. …


Fisheries Report No 59 - Potential Fisheries Capability Of The Ord In The Short, Medium And Long Terms, Dr N. Morrissy Jan 1983

Fisheries Report No 59 - Potential Fisheries Capability Of The Ord In The Short, Medium And Long Terms, Dr N. Morrissy

Fisheries Research Reports

This report examines the history, future and problems of various methods for development and exploitation of the fisheries resources of the Ord.

The primary resource is the array of native fish and crustacean species, with the possible introduction of other desirable or noxious species being a subject for consideration.

Water resources, supporting these species, are the remaining natural Ord River downstream from the Diversion Dam at Kununurra, the stillwaters of Lake Kununurra and Lake Argyle, and, for aquaculture, the controlled distribution of water supply over the flat land of the irrigation system (Fig. 1). Another recognized resource is the climatic …


Report No 58 - 1982 - Review Of Rainfall And Wetlands In The South-West Of Western Australia, J. A.K. Lane, D. R. Munro Jan 1983

Report No 58 - 1982 - Review Of Rainfall And Wetlands In The South-West Of Western Australia, J. A.K. Lane, D. R. Munro

Fisheries Research Reports

An account is given of involved the biological principles in decisions concerning duck-shooting seasons in the south-west of western Australia.

Conditions for waterfowl during 1982 are described through the use of rainfall statistics and data obtained from the Department's wetland monitoring programme.

1982 was characterized by exceptionally high rainfall in January and well-below average from February to October.

1982 was the seventh consecutive year of below-average rainfall in all five Meteorological of the south-west. 1976 to 1982 has thus been the south-west's driest seven-year period for more than seventy years.

The record-breaking rains of January caused widespread flooding in the …


Ubersicht Der Ergebnisse Der Ungarischen Zoologischen Expeditionen In Der Mongolischen Volksrepublik 1963-1968, Zoltan Kaszab Jan 1983

Ubersicht Der Ergebnisse Der Ungarischen Zoologischen Expeditionen In Der Mongolischen Volksrepublik 1963-1968, Zoltan Kaszab

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Die Fauna der Mongolischen Volksrepublik war bis zu den 60er Jahren unseres Jahrhunderts fast unbekannt geblieben. Eine Ausnahme ist die Wirbeltierfauna, welche vor allem von russischen Zoologen gründlich erforscht und deren Resultate publiziert wurden. Dagegen hatten wir von den Wirbellosen nur spärliche Angaben in der Literatur, welche teils auf der Sammeltätigkeit russischer Forscher beruhen. Von ungarischer Seite war nur eine Expedition an der Jahrhundertwende (1898) von dem Grafen Eugen ZICHY durchgeführt worden, und während der kurzen Durchreise (3. bis 15. September) in der Mongolei hat sein Begleiter E. CSIKI, damaliger Kustos der Zoologischen Abteilung des Ungarischen Nationalmuseums, ein abwechslungsreiches zoologisches …


Water Quality Trends In The Las Vegas Wash Wetlands, F. A. Morris, L. J. Paulson Jan 1983

Water Quality Trends In The Las Vegas Wash Wetlands, F. A. Morris, L. J. Paulson

Publications (WR)

The Las Vegas Wash is a wetlands ecosystem that acts to buffer the effects of wastewater discharges on the receiving waters of Lake Mead. The wash is the terminus for the 4,144 km2 Las Vegas Valley drainage basin, emptying into Las Vegas Bay of Lake Mead (Colorado River). It is in the northern Mojave desert, which receives an average of only 10 cm of rainfall annually. The Las Vegas Wash is technically an artificial wetland supported almost entirely by the perennial flows from sewage treatment plants. These flows contribute an average of 3-7 t of nutrients (nitrogen and phosphorus) and …


The Effects Of Limited Food Availability On The Striped Bass Fishery In Lake Mead, John R. Baker, Larry J. Paulson Jan 1983

The Effects Of Limited Food Availability On The Striped Bass Fishery In Lake Mead, John R. Baker, Larry J. Paulson

Publications (WR)

The original range of striped bass (Morone saxatilis) was along the Atlantic Coast. They were introduced into the lower Sacramento River in 1879 and are now also found along the Pacific Coast. A landlocked striped bass fishery was established in Santee-Cooper Reservoir, South Carolina, in 1954, and they have since been introduced into numerous other reservoirs, including Lake Havasu, Lake Mead and Lake Powell on the Colorado River. Striped bass were introduced into Lake Mead in 1969 in response to declines in the largemouth bass (Micropterus salmoides) fishery that occurred during the 1960s and in order to further utilize the …


Entwicklung Und Stand Der Geobotanischen Forschung Über Die Mongolische Volksrepublik, W. Hilbig, B. M. Mirkin Jan 1983

Entwicklung Und Stand Der Geobotanischen Forschung Über Die Mongolische Volksrepublik, W. Hilbig, B. M. Mirkin

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

In vor liegendem Beitrag wird die Entwick lung der geobotanischen Forschung über das Gebiet der Mongolischen Volksrepublik dargestellt. Ausgehend von ersten eigen­ ständigen geobotanischen Forschungen sowjetischer Botaniker auf Expeditionen durch die Mongolei in den 20er und 30er Jahren, wurde die pflanzengeograph isch-vegeta­ tionskundliche Erkundung der Mongolei auf sowjetisch-mongolischen Exped itionen der 40er und 50er Jahre weitergeführt. Die besonderen Verd'.enste von A. A JUNA­ TOV und E. M. LAVRENKO an der Entwicklung der geobotanischen Forschung in der Mongolei werden hervorgehoben. JUNATOV war auch besonders an der Heran­ bildung mongolischer Geobotaniker beteiligt. Einen besond eren Schwerpunkt der geobotanischen Forschung in der Mongolischen …


Internationales Symposium Über Die Erforschung Biologischer Ressourcen Der Mongolischen Volksrepublik, Michael Stubbe, W. Hilbig, N. Dawaa Jan 1983

Internationales Symposium Über Die Erforschung Biologischer Ressourcen Der Mongolischen Volksrepublik, Michael Stubbe, W. Hilbig, N. Dawaa

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

First two paragraphs:

Vom 29. 8. b is 2. 9. 1983 organisierte die Sektion Biowissenschaften der Martin-Luther-Universität gemeinsam mit der Biologischen Gesellschaft der DDR in Halle/ Saale die bisher größte internationale wissenschaftliche Konferenz über die Erforschung biologischer Ressourcen der MVR.

166 Biologen, Fachleute anderer Disziplinen der Naturwissenschaften, der Landwirtschaftswissenschaften und Medizi aus der UdSSR (18), CSSR (15), MVR (13), VR olen (3), Frankreich (2) und der DDR (115) nahmen an diesem Symposium teil, um in einem intensiven Erfahrungsaustausch Fragen der Erforschung der biologischen Ressourcen der MVR zu beraten.


Der Erste Nachweis Von Sorex Isodon Turov, 1924 (Mammalia: Insectivora) In Der Mongolei, Namshil Chotolchu Jan 1983

Der Erste Nachweis Von Sorex Isodon Turov, 1924 (Mammalia: Insectivora) In Der Mongolei, Namshil Chotolchu

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

First paragraph:

Das bekannte Areal von Sorex isodon erstreckt sich von Finnland über den europäischen Teil der Sowjetunion, durch Mittel- und Ostsibirien über das Baikalgebiet bis zum Fernen Osten, nach Kamtschatka und den nördlichen Kurilen. Vom Territorium der Mongolischen Volksrepublik war die Art bischer nicht nachgewiesen (BANNIKOV 1954, DULAMCEREN 1970).


Abriß Der Erforschungsgeschichte Der Avifauna Mongolica, R. Piechocki Jan 1983

Abriß Der Erforschungsgeschichte Der Avifauna Mongolica, R. Piechocki

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Die erste Periode der Erforschung der Avifauna mongolica umfaßt den Zeitraum von 1871 bis 1931. Nach den zentralasiatischen Expeditionen von N. M. PRZEVALSKIJ brachten dieser und danach F. D. PLESKE und W. L. BIANCHI die ersten ornithologischen Beiträge heraus. Im Auftrage der Russischen Geographischen Gesellschaft leitete G. N. POTANIN eine Expedition durch die Nordwest-Mongolei. Weitere Expeditionen führte P. K. KOZLOV durch; die ornithologische Ausbeute wurde von W. L. BIANCHI bearbeitet. Um die Jahrhundertwende setzt die Erforschung der Nordmongolei ein durch W. S. MOLLESON, 0. BAMBERG und F. SCHILLING. Die ornithologische Erschließung der Nordwest-Mongolei ist P. P. SUSHKIN und A. J. …


Beitrag Zur Ökologie Und Morphologie Von Ovis Ammon L. 1758 In Der Mvr, N. Dawaa, Ch. Suchbat, Michael Stubbe Jan 1983

Beitrag Zur Ökologie Und Morphologie Von Ovis Ammon L. 1758 In Der Mvr, N. Dawaa, Ch. Suchbat, Michael Stubbe

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

In dеп Jahгen 1971 und 1974 bis 1977 wurden einige Daten zum Sozialverhalten von Ovis ammon im Mongolischen und Gobi-Altai in der Mongolischen Volksгepublik zusammengetгagen. Die Rudelgrößen und -zusammensetzungen sind saisonal be­ dingt. Beobachtungen zur ciгcadianen und ciгcannualen Aktivität sowie zu inteгspezifischen Kontakten von Wild- und Haustieгen weгden aufsummiert. Die jährliche Zuwachsrate liegt im Mongolischen Altai erhebich unter jener im Gobi-Altai . Diese Erkenntnis sowie zu eraгbeitende Analysen zur Altersstгuktur und natiürlichen Mortalität stellen Gruпdparameter zuг wirtschaftlichen Nutzung der Wildschafbestände dar. Morphologische Daten von 5 Widdern aus dem Gobi-Altai kennzeichnen das Hornwachstum in dieser Region.

Russian abstract:

Заключение

В 1971 …


Stand Und Aufgaben Der Erforschung Der Eintagsfliegenfauna (Insecta, Ephemeroptera) In Der Mongolischen Volksrepublik, D. Braasch Jan 1983

Stand Und Aufgaben Der Erforschung Der Eintagsfliegenfauna (Insecta, Ephemeroptera) In Der Mongolischen Volksrepublik, D. Braasch

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Der gegenwärtige Stand der Erforschung der mongolischen Ephemeropterenfauna wird dargelegt. Für die MVR können 54 Arten belegt werden. Die Eintagsfliegen des Landes entstammen verschiedenen Gruppen und Faunenelementen: holarktische, eurosibirische, mongolische und mandschuro-japanische.


Zur Entwicklung Der Wildforschung Und Jagdwirtschaft In Der Mongolischen Volksrepublik, N. Dawaa, Ch. Suchbat Jan 1983

Zur Entwicklung Der Wildforschung Und Jagdwirtschaft In Der Mongolischen Volksrepublik, N. Dawaa, Ch. Suchbat

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

1972 wurde an dег Mongolischen Staallichen Unveгsität Ulan-Bator mit der Ausbildung von Wildbiologen begonnen, um durch diese Fachkadeг die Aгbeit auf jagd wirtschaftlichem Gebiet qualitativ entscheidend zul veгbesseгn. Die Veгfasseг beгichten übег die wichtigsteп Forschuпgsaufgaben im Lehrstuhl füг Zoologie, Bereich Jagdwirtschaft, die sich auf Fгagen der Ökonomie und Organisation der Jagdwirtschaft, dег Erkundung dег Wildbiologie und Bejagungs- sowie Erfassungsmethoden der Wildbestäпde, dег Qualitätsverbesserung der Jagdprodukte und dег Akklimatisation bzw. Reakklimutisation von Wildtieren koпzentгieгen.

Russian abstract:

Заключение

С 1972 г. в Монгольском Государственном Унинерситеге в Улан-Баторе обучаются охотоведы, чтобы с помощью этих кадров качественно заметно улучшить работу в области охотничьего хозяйства. …


Stand Der Akklimatisation Von Ondatra Zibethica L., 1766 In Der Mongolei, N. Dawaa, P. Lchamsuren, Michael Stubbe Jan 1983

Stand Der Akklimatisation Von Ondatra Zibethica L., 1766 In Der Mongolei, N. Dawaa, P. Lchamsuren, Michael Stubbe

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Die Bisamratte Ondatra zibethica ist auf dem Territorium der Mongolischen Volksrepublik in den Flußsystemen der Selenga, des Ulz und Onon sowie des Bulgan-gol selbständig eingewandert. Zu Einbürgerungen kam es 1967 und 1971 am Char-us-nuur sowie 1978 am Zergijn-caagan-nuur und Olon-nuur. Der weiteren Verbreitung dieses wertvollen Pelzlieferanten wird besondere Aufmerksamkeit geschenkt.

Russian abstract:

Заключение

На территсрии Монгольской Народной Республики ондатра Ondatra zibethica са­ мостоятельно заселила системы рек Селенга, Улз, Онон и Булган-Гол. Интро­ дукции происошли в 1967 и 1973 гг. на Хар-Ус-Нууре, а также в 1978 г. на Зер­ гийн-Цагаан-Нуурс и Олон-Нууре. Дальнейшему распространению этого ценного шушного зверя удс."l'ястся особое внимание. …


Limiting Swine Stress With Evaporative Cooling In The Southeast, Robert L. Fehr, K. T. Priddy, Samuel G. Mcneill, Douglas G. Overhults Jan 1983

Limiting Swine Stress With Evaporative Cooling In The Southeast, Robert L. Fehr, K. T. Priddy, Samuel G. Mcneill, Douglas G. Overhults

Biosystems and Agricultural Engineering Faculty Publications

Three-hourly weather data for 7 locations in the Southeast and Central United States were used to evaluate the feasibility of evaporative cooling for reducing swine stress. Stress was defined as a relationship between dry and wet bulb temperatures which exceeded a stress index of 85. This analysis indicates that properly installed evaporative coolers could reduce the number of hours that stress would occur in swine facilities from 89.6 to 96.4% depending on location.


Growth And Activity Of Juvenile Mosquitofish: Temperature And Ration Effects, Wayne A. Wurtsbaugh, J. Cech Jan 1983

Growth And Activity Of Juvenile Mosquitofish: Temperature And Ration Effects, Wayne A. Wurtsbaugh, J. Cech

Watershed Sciences Faculty Publications

The effects of constant temperatures (10, 15, 20, 25, 30, and 35 C) and ration size on the growth rates and activity of juvenile mosquitofish Gambusia affinis (mean wet weight, about 20 mg) were measured in laboratory experiments. On ad libitum rations of Tubifex spp. worms, food-consumption rates of mosquitofish were very high, ranging from 7% dry body weight/day at 10 C to 83%/day at 35 C. Growth increased from 0% dry body weight/day at 10 C to 21%/day at 30 C and declined slightly at 35 C. Gross efficiencies (100 growth/food consumption) increased from 0 at 10 C to …


Use Of Hydroelectric Dams To Control Evaporation And Salinity In The Colorado River System, Larry J. Paulson Jan 1983

Use Of Hydroelectric Dams To Control Evaporation And Salinity In The Colorado River System, Larry J. Paulson

Publications (WR)

The main stem reservoirs on the Colorado River comprise one of the largest and most heavily used freshwater bodies in the nation. These reservoirs (Lake Powell, Lake Mead, Lake Mohave and Lake Havasu) can store up to 53,590,400 acre-feet of water at their maximum capacities. Nonetheless, local water shortages still exist in some areas of the Colorado River Basin. There is also concern that salt concentrations are approaching levels that could severely affect municipal and agricultural uses. Water shortages will become even more acute as demands for water increase with continued urban and agricultural development in the basin. Water conservation …


Historical Patterns Of Phytoplankton Productivity In Lake Mead, Richard T. Prentki, Larry J. Paulson Jan 1983

Historical Patterns Of Phytoplankton Productivity In Lake Mead, Richard T. Prentki, Larry J. Paulson

Publications (WR)

Lake Mead was impounded in 1935 by the construction of Hoover Dam. The Colorado River was unregulated prior to then and therefore was subjected to extreme variations in flows and suspended sediment loads. Hoover Dam stabilized flows and reduced suspended sediment loads downstream, but Lake Mead still received silt-laden inflows from the upper Colorado River Basin. The Colorado River contributed 97% of the suspended sediment inputs to Lake Mead, and up to 140 x 1O6 metric tons (t) entered the reservoir in years of high runoff. Most of the sediments were deposited in the river channel and formed an …


The Influence Of Lake Powell On The Suspended Sediment-Phosphorus Dynamics Of The Colorado River Inflow To Lake Mead, T. D. Evans, Larry J. Paulson Jan 1983

The Influence Of Lake Powell On The Suspended Sediment-Phosphorus Dynamics Of The Colorado River Inflow To Lake Mead, T. D. Evans, Larry J. Paulson

Publications (WR)

The Colorado River has been successively modified by the construction of several reservoirs, beginning in 1935 with the formation of Lake Mead by Hoover Dam. These reservoirs are located in a chain, and each one has an influence on the nutrient dynamics and productivity of the river and downstream reservoir. Lake Mead derives 98% of its annual inflow from the Colorado River. Historically, the Colorado River inflow was unregulated into Lake Mead. Regulation occurred in 1963, when Lake Powell was impounded by the construction of Glen Canyon Dam, approximately 450 km upstream. The formation of Lake Powell drastically altered the …


Effects Of Sewage Pollution In The White River, Arkansas, Arthur V. Brown, Lawrence D. Willis, Peter P. Brussock Jan 1983

Effects Of Sewage Pollution In The White River, Arkansas, Arthur V. Brown, Lawrence D. Willis, Peter P. Brussock

Journal of the Arkansas Academy of Science

Recently there has been much emphasis placed on the importance of leaf detritus processing to the energetics of stream invertebrates. This study was designed primarily to assess the effects of municipal effluent on the ability of a stream community to utilize leaf detritus, and secondarily to evaluate the extent of the pollution of the White River by the Fayetteville, Arkansas, effluent discharge. Physical and chemical water quality and benthos were sampled periodically at one station upstream and two stations downstream from the discharge, and in the Richland Creek tributary. Processing of leaf detritus was also studied at each site using …


Project Aquarius (Csiro) : The Effects Of Bushfires On Honey Production : Submission And Comments To The Federal Council Of Australian Apiarists' Associations, R C. Burking, A. C. Kessell Jan 1983

Project Aquarius (Csiro) : The Effects Of Bushfires On Honey Production : Submission And Comments To The Federal Council Of Australian Apiarists' Associations, R C. Burking, A. C. Kessell

Apiculture research reports

No abstract provided.


Raw Water Quality In The New Charleston, Illinois Pump Storage Reservoir, Kevin G. Lookis Jan 1983

Raw Water Quality In The New Charleston, Illinois Pump Storage Reservoir, Kevin G. Lookis

Masters Theses

Charleston, Illinois, a city located in east-central Illinois, recently implemented a new concept in a raw water system. Due to storage capacity-sedimentation problems in the old Lake Charleston-Embarras River raw water supply, the Charleston Pump Storage Reservoir was constructed. The new system involved building a dike separating the Lake Charleston impoundment from the Embarras River. Water to increase the storage capacity of the reservoir can now be selectively pumped into the impoundment from the river.

Raw water quality in the reservoir was monitored on a weekly basis for a full year from August, 1981 to August, 1982. The levels of …


Mammals Of The Northern Great Plains, J. Knox Jones Jr., David M. Armstrong, Robert F. Hoffmann, Clyde Jones Jan 1983

Mammals Of The Northern Great Plains, J. Knox Jones Jr., David M. Armstrong, Robert F. Hoffmann, Clyde Jones

University of Nebraska State Museum: Mammalogy Papers

For the purposes of this book, the Northern Great Plains are defined as the states of Nebraska, North Dakota, and South Dakota. As a physiographic concept, the northern part of the great interior grasslands of North America is, of course, much broader in geographic extent than the Dakotas and Nebraska, but the three states lie in the heart of the region, and thus the title for this work seems appropriate. Our expectations in writing Mammals of the Northern Great Plains were to provide a comprehensive, yet semitechnical, treatmeat of free-living mammals that would prove useful to specialist and nonspecialist alike. …