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Articles 9691 - 9720 of 9843
Full-Text Articles in Physical Sciences and Mathematics
The Prairie Naturalist Volume 3, No.2. June, 1971
The Prairie Naturalist Volume 3, No.2. June, 1971
The Prairie Naturalist
EDITORIAL: Environmental Rights ▪ Paul B. Kannowski
RIVER BASINS PLANNING ▪ H. A. Hendrickson
WATER RESOURCE PLANNING GONE AMUCK ▪ Charles H. Stoddard
THE INTERACTION OF CITIZENS' GROUPS AND GOVERNMENT AGENCIES WITH RESPECT TO ENVIRONMENTAL PROBLEMS ▪ Robert L. Burgess
WORDS AND MEANINGS ▪ Paul T. Crary
ENFORCEMENT OF NORTH DAKOTA ENVIRONMENTAL LAWS AND REGULATIONS ▪ Robert E. Beck
BIRDS OBSERVED IN NORTH DAKOTA DURING THE WINTER OF 1970-71 ▪ John T. Lokemoen and Paul E. Springer
STATUS OF CLARK'S NUTCRACKER IN NORTH DAKOTA ▪ Lewis W. Oring and Robert W. Seabloom
WINGED ANTS AS FISH FOOD ▪ Charles H. …
A Conceptual Draft Of A Dynamic Hydro-Biological Model For Lake Mead, L. G. Everett, Bureau Of Reclamation
A Conceptual Draft Of A Dynamic Hydro-Biological Model For Lake Mead, L. G. Everett, Bureau Of Reclamation
Publications (WR)
Food and energy transformation in an aquatic system must be understood in order to develop a simulation approach. This report provides a comprehensive study of an aquatic ecosystem. The objectives of this report are to show: (1) the biological relationships in an aquatic system (2) the role of nutrients in the biological cycle (3) the role of abiotic factors in a limnetic environment (4) the status of the art of "Eutrophication modeling".
The Prairie Naturalist Volume 3, No.1 March, 1971
The Prairie Naturalist Volume 3, No.1 March, 1971
The Prairie Naturalist
EDITORIAL: One House for Natural Resource Management ▪ Paul B. Kannowski
CHECKLIST OF BIRDS IN NORTH DAKOTA ▪ Robert E. Stewart
ADDITIONAL INFORMATION ON THE WOOD DUCK IN NORTH DAKOTA ▪ Edmund A. Hibbard
NOTES ON DANDELIONS ▪ O. A. Stevens
CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA—1970 ▪ Robert N. Randall
THE EROSION OF ONE OF MAN'S MOST PRECIOUS NATURAL RESOURCES: HIS FREEDOM OF CHOICE ▪ Gordon L. Iseminger
NOTEWORTHY PLANTS OF THE NORTH DAKOTA PRAIRIE COTEAU FOREST ▪ W. Carter Johnson
NOTE — Duck mortality caused by wind ▪ Harold Kantrud
Sampling Small Mammal Population In Curlew Valley Methodological Study, David F. Balph
Sampling Small Mammal Population In Curlew Valley Methodological Study, David F. Balph
Progress reports
No abstract provided.
Productivity And Water Stress In Cacti Progress Report, Duncan T. Patten
Productivity And Water Stress In Cacti Progress Report, Duncan T. Patten
Progress reports
No abstract provided.
Validation Studies At Tucson, Arizona, David Hendricks, A. Neil Macgregor, E. Lendell Cockrum, Et Al
Validation Studies At Tucson, Arizona, David Hendricks, A. Neil Macgregor, E. Lendell Cockrum, Et Al
Progress reports
No abstract provided.
Development Of A Technique For Measuring The Water Balance Of Validation Study Areas Methodological Study, John Thames, H. Qashu, C. Kiesel
Development Of A Technique For Measuring The Water Balance Of Validation Study Areas Methodological Study, John Thames, H. Qashu, C. Kiesel
Progress reports
No abstract provided.
Validation Studies At Deep Creek, Curlew Valley Validation Study, G. W. Minshall, F. L. Rose, D. A. Andrews, D. M. Shaw
Validation Studies At Deep Creek, Curlew Valley Validation Study, G. W. Minshall, F. L. Rose, D. A. Andrews, D. M. Shaw
Progress reports
No abstract provided.
Role Of Algae In Crust Formation In Desert Soils Process Studies, Raymond I. Lynn, Roy E. Cameron
Role Of Algae In Crust Formation In Desert Soils Process Studies, Raymond I. Lynn, Roy E. Cameron
Progress reports
No abstract provided.
Models Of Ingestion Rates For Desert Biome Rodents Process Study, Donald R. Johnson
Models Of Ingestion Rates For Desert Biome Rodents Process Study, Donald R. Johnson
Progress reports
No abstract provided.
Impoundment Effects On Water Quality As Reflected In Parasitism Of Reservoir Basses, David A. Becker
Impoundment Effects On Water Quality As Reflected In Parasitism Of Reservoir Basses, David A. Becker
Arkansas Water Resources Center Technical Reports
Our aquatic environments are rapidly becoming useless as natural resources through pollution from various sources. It is therefore necessary for us to further understand the various means which relate to this process. The interrelationships between the physico-chemical and biological water qualities undergo marked changes during the ageing of a reservoir. Eutrophication of these impoundments render them rela-tively useless as natural resources. It thus becomes apparent that we must gain further knowledge of these processes if we are to devise methods for proper reservoir management.
Fisheries Report No 9 - The Fauna And Flora Of Monte Bello Islands, A. A. Burbidge Dr
Fisheries Report No 9 - The Fauna And Flora Of Monte Bello Islands, A. A. Burbidge Dr
Fisheries Research Reports
Two visits were made to the Monte Bello Islands in 1970 and 1971.
The aim of the visits was to examine the islands for the presence of native mammals and other fauna, and to explore the possibility of re-establishing fauna now extinct,
The first survey was carried out in conjunction with a more detailed examination of the Dampier Archipelago. The fisheries patrols vessel "Dampier" was used to reach the islands and as a base. Personnel were R. Johnstone (W.A. Museum), E.J. Little and J.D. Harman (crew of the "Dampier"), R.F. Dear and A.A, Burbidge, all from the Department of Fisheries …
Validation Studies At Locomotive Springs, Curlew Valley Validation Study, J. Anne Holman
Validation Studies At Locomotive Springs, Curlew Valley Validation Study, J. Anne Holman
Progress reports
No abstract provided.
The Jornada Validation Site (Playa- Nmsu Ranch) Validation Study, Walter G. Whitford, John Ludwig
The Jornada Validation Site (Playa- Nmsu Ranch) Validation Study, Walter G. Whitford, John Ludwig
Progress reports
No abstract provided.
Growth And Development Of Sitanion Hystrix Process Study, M. Hironaka, E. W. Tisdale
Growth And Development Of Sitanion Hystrix Process Study, M. Hironaka, E. W. Tisdale
Progress reports
No abstract provided.
Evaluation Of Techniques For Estimating Population Sizes In Desert Rodents Methodological Study, C. D. Jorgensen, H. D. Smith, D. T. Scott, H. D. Tolley
Evaluation Of Techniques For Estimating Population Sizes In Desert Rodents Methodological Study, C. D. Jorgensen, H. D. Smith, D. T. Scott, H. D. Tolley
Progress reports
No abstract provided.
Development Of Techniques For Estimating Biomass Of Desert Inhabiting Invertebrate Animals Methodological Study, Gordon L. Bender
Development Of Techniques For Estimating Biomass Of Desert Inhabiting Invertebrate Animals Methodological Study, Gordon L. Bender
Progress reports
No abstract provided.
Diets, Food Preferences And Reproductive Cycles Of Some Desert Mammals Process Study, Russell P. Balda, Gary C. Bateman, Terry A. Vaughan
Diets, Food Preferences And Reproductive Cycles Of Some Desert Mammals Process Study, Russell P. Balda, Gary C. Bateman, Terry A. Vaughan
Progress reports
No abstract provided.
Autecological Studies Of Atriplex Confertifolia And Eurotia Lanata Process Study, Martyn M. Caldwell, Neil E. West, Peter J. Goodman
Autecological Studies Of Atriplex Confertifolia And Eurotia Lanata Process Study, Martyn M. Caldwell, Neil E. West, Peter J. Goodman
Progress reports
No abstract provided.
Soil Model -- Heat, Water, And Salt Flow, R. J. Hanks, D. D. Austin, W. T. Ondrechen
Soil Model -- Heat, Water, And Salt Flow, R. J. Hanks, D. D. Austin, W. T. Ondrechen
Progress reports
No abstract provided.
Ecosym-Climatic Classification, Stephen W. Zsiray Jr., Gene L. Wooldridge
Ecosym-Climatic Classification, Stephen W. Zsiray Jr., Gene L. Wooldridge
Progress reports
No abstract provided.
Data Bank And Data Processing, Us/Ibp Analysis Of Ecosystems Desert Biome
Data Bank And Data Processing, Us/Ibp Analysis Of Ecosystems Desert Biome
Progress reports
No abstract provided.
Seasonal Movements And Behavior Of Ring-Necked Pheasants In Eastern South Dakota, Arthur V. Carter
Seasonal Movements And Behavior Of Ring-Necked Pheasants In Eastern South Dakota, Arthur V. Carter
Electronic Theses and Dissertations
Information was gathered on mobility, behavior, and related activities of pheasants from July 1966 to July 1968 by banding and/or marking 160 birds with backtags and radio transmitters. Food was readily available since the winters were mild with little snow. Birds moved less than 1/4 mile from roosting areas to cornfields and weed patches to feed. Numbers of birds dispersing from the study area in spring varied each of the years, but 60 to 70 remained there during the two reproductive seasons. Adult cocks traveled less than 1/4 mile when dispersing-and adult hens moved less than 1/2 mile. Movements by …
Effects Of Chick Stimuli And Dieldrin On Adoptive Behavior Of Penned Hen Pheasants, K. L. Cool
Effects Of Chick Stimuli And Dieldrin On Adoptive Behavior Of Penned Hen Pheasants, K. L. Cool
Electronic Theses and Dissertations
Studies to determine the effect of chick stimuli and dieldrin on adoptive behavior of penned hen pheasants were conducted in 1969 and 1970. Results indicated that whether caged hens saw or heard chicks had no effect on adoption or killing of chicks. Hens receiving sound stimuli and sight-and-sound stimuli from chicks responded similarly to hens receiving no stimuli. Sub-lethal doses of dieldrin also had no effect on chick adoption under the conditions of this study. Results demonstrated that non-incubating pheasant hens will adopt and brood orphan chicks. During the 2 years of the study, respectively, 37 and 49 percent of …
Phytoplankton Dynamics Of Two Northern Prairie Lakes And Possible Relations To Dissolved Nutrients, Alan B. Hauber
Phytoplankton Dynamics Of Two Northern Prairie Lakes And Possible Relations To Dissolved Nutrients, Alan B. Hauber
Electronic Theses and Dissertations
Phytoplankton populations in Enemy Swim Lake were observed to be quite different. Although these lakes lie within the same geographic area (Coteau des Prairies), major differences in water quality were recorded. The differences in water quality were reflected in the phytoplankton populations and appeared to be influenced by the agricultural practices on the watersheds. Enemy Swim Lake was basically a diatom lake while Lake Herman contained mostly blue-green algae. Genera of algae found in Enemy Swim Lake were: Anabaena, Aphanizomenon, Lyngbya, Pediastrum, Staurastrum, Dinobyron, Asterionella, Fragilaria, Melosira, Stephanodiscus, and Ceratium. All of the above genera occurred in Lake Herman except …
Population Dynamics Of The Mourning Dove In South Dakota, Leslie A. Rice
Population Dynamics Of The Mourning Dove In South Dakota, Leslie A. Rice
Electronic Theses and Dissertations
Mourning dove bandings in South Dakota totaled 44,842 from 1917 through 1970. Adult bandings totaled 44.4 percent of all bandings while immatures, juveniles, locals, and unknown age were 41.3, 0.8, 12.8, and 0.7 percent, respectively. Recoveries totaled 2.8 percent of the banded population, 2.5 percent from hunting and 0.5 percent from non-hunting. Annual mortality estimates of local (nestling) bandings from 1956-61 were between 54.4 and 64.5 percent. Subsequent adult mortality from local bandings was between 51.0 and 52.4 percent. Mean annuals mortality estimates of flying doves banded from 1964-69 were calculated using composite dynamic, composite time-specific, relative recovery rate, a …
Nutrient Transport In The Lake Poinsett System, Jack M. Skille
Nutrient Transport In The Lake Poinsett System, Jack M. Skille
Electronic Theses and Dissertations
Concentrations and loads of nutrients transported through the Lake Poinsett system were monitored from April 1, 1970 to April 1, 1971. An annual 2.07x 10~ m3 surface discharge into Lake Poinsett transported 1.66 x 104 kg (PO4) phosphorus, 1.28 x 104 kg nitrate nitrogen, and 3.90 x 104 kg organic carbon. The Big Sioux River-Dry Lake system contributed 63% of the phosphorus, 45% of the nitrate nitrogen, and 43% of the organic carbon load. The remaining portion entered Lake Poinsett from the Lake Albert drainage. Of the annual load of nutrients transported into Lake Poinsett, 33% of the nitrate nitrogen …
A Clinico-Pathologic Study Of Botulism In Ring-Necked Pheasants, Hazel J. Shave
A Clinico-Pathologic Study Of Botulism In Ring-Necked Pheasants, Hazel J. Shave
Electronic Theses and Dissertations
Toxins were produced from 6 strains of Cl. Botulinum, 2 of which killed pheasants. Inoculated birds were observed and a description of the progression of signs of the disease is given. Juvenile pheasants were inoculated with Types A and C toxin intramuscularly and were given the toxin orally. These birds were observed and their clinical signs noted. Adult pheasants were inoculated with toxoid prepared from type C toxin and commercial toxoid; injections were repeated in 21 days. Fourteen days following the final injection, the birds were challenged with toxin. Those protected with toxoid survived, while those receiving saline succumbed. Gross …
Macroscopic Benthos Populations And Taxonomy Of The Family Chironomidae In Lake Poinsett, South Dakota, Stephen B. Smith
Macroscopic Benthos Populations And Taxonomy Of The Family Chironomidae In Lake Poinsett, South Dakota, Stephen B. Smith
Electronic Theses and Dissertations
Benthos samples were collected in Lake Poinsett, a highly eutrophic eastern South Dakota lake, from March 1970 through February 1971. The lake bottom was divided into three substrate types (sand, sand-sapropel mixture and sapropel) and the percent of each substrate type was calculated. Nineteen macroscopic genera were taken from ten sampling stations located throughout the lake. Descriptions are presented for organisms in this group. Diversity of organisms was greatest in the sand substrates, in that all 19 genera were collected. Chironomus spp. (Chironomus plomosus, Chironomus attenuates and six unidentified species) was the most abundant group of organisms and occurred most …
Recent Sediments Of Humboldt Bay, Eureka, California, Robert Wayne Thompson
Recent Sediments Of Humboldt Bay, Eureka, California, Robert Wayne Thompson
Special Collections Archived Publications
Humboldt Bay is a coastal lagoon, 14 mi. long and a maximum of 4 mi. wide. The bay has three distinct segments, South, Entrance, and Arcata Bays, each of which occupies the seaward end of one or more stream valleys cut into Plio- Pleistocene paralic sediments. The segments are linked by narrow tidal channels which are bounded by a barrier spit on the west and by high valley interfluves on the east. Climate of the area is rainy temperate . Tides are of the mixed type with a mean range of 6.5 ft.
Textural variations of the surface sediments in …