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Articles 29851 - 29880 of 30774
Full-Text Articles in Entire DC Network
Shoot Growth And Litter Fall Processes As They Bear On Primary Production Of Some Cool Desert Shrubs, N. E. West, Marcee Fareed
Shoot Growth And Litter Fall Processes As They Bear On Primary Production Of Some Cool Desert Shrubs, N. E. West, Marcee Fareed
Memorandum
No abstract provided.
Biomass And Nutrients In Desert Shrub Ecosystems, James O. Klemmedson, Edwin L. Smith
Biomass And Nutrients In Desert Shrub Ecosystems, James O. Klemmedson, Edwin L. Smith
Memorandum
No abstract provided.
Biology Of Nematodes In Desert Ecosystems, R. Mankau, S. A. Sher, D. W. Freckman
Biology Of Nematodes In Desert Ecosystems, R. Mankau, S. A. Sher, D. W. Freckman
Memorandum
No abstract provided.
Application Of Remote Sensing Techniques For Analysis Of Desert Biome Validation Studies, P. T. Tueller, Garwin Lorain
Application Of Remote Sensing Techniques For Analysis Of Desert Biome Validation Studies, P. T. Tueller, Garwin Lorain
Memorandum
No abstract provided.
Seed Reserves Of Desert Soils, Stuart Childs, David W. Goodall
Seed Reserves Of Desert Soils, Stuart Childs, David W. Goodall
Memorandum
No abstract provided.
Nitrogen Dynamics In Stands Dominated By Some Major Cool Desert Shrubs, J. J. Skujins, N. E. West
Nitrogen Dynamics In Stands Dominated By Some Major Cool Desert Shrubs, J. J. Skujins, N. E. West
Memorandum
No abstract provided.
Foraging Activity Of The Leaf-Cutter Ant, Acromyrmex Versicolor, In Relation To Season, Weather And Colony Condition, F. G. Werner
Foraging Activity Of The Leaf-Cutter Ant, Acromyrmex Versicolor, In Relation To Season, Weather And Colony Condition, F. G. Werner
Memorandum
No abstract provided.
Population Structure, Foraging Behavior And Daily Movements Of Certain Sonoran Desert Birds, S. M. Russell, P. J. Gould, E. L. Smith
Population Structure, Foraging Behavior And Daily Movements Of Certain Sonoran Desert Birds, S. M. Russell, P. J. Gould, E. L. Smith
Memorandum
No abstract provided.
Colony Characters Of Termites As Related To Population Density And Habitat, W. L. Nutting, M. I. Haverty, J. P. Lafage
Colony Characters Of Termites As Related To Population Density And Habitat, W. L. Nutting, M. I. Haverty, J. P. Lafage
Memorandum
No abstract provided.
Role Of Orthoporus Ornatus Millipedes In A Desert Ecosystem, C. S. Crawford, R. C. Wooten Jr.
Role Of Orthoporus Ornatus Millipedes In A Desert Ecosystem, C. S. Crawford, R. C. Wooten Jr.
Memorandum
No abstract provided.
Demography And Bioenergetics Of Herbivorous Ants In A Desert Ecosystem As Functions Of Vegetation Soil Type And Weather Variables, W. G. Whitford
Demography And Bioenergetics Of Herbivorous Ants In A Desert Ecosystem As Functions Of Vegetation Soil Type And Weather Variables, W. G. Whitford
Memorandum
No abstract provided.
Demographic And Bioenergetic Studies Of Cutworms In Curlew Valley, W. J. Hanson, G. F. Knowlton
Demographic And Bioenergetic Studies Of Cutworms In Curlew Valley, W. J. Hanson, G. F. Knowlton
Memorandum
No abstract provided.
Gaseous Losses Of Nitrogen From The Soil Of Semi-Arid Regions, T. C. Tucker, R. L. Westernman
Gaseous Losses Of Nitrogen From The Soil Of Semi-Arid Regions, T. C. Tucker, R. L. Westernman
Memorandum
No abstract provided.
Respiratory Metabolism Of Utah Chub (Gila Atraria), R. H. Kramer, P. K. Rajagopal
Respiratory Metabolism Of Utah Chub (Gila Atraria), R. H. Kramer, P. K. Rajagopal
Memorandum
No abstract provided.
Water Uptake By Plants Under Desert Conditions, H. K. Qashu, D. D. Evans, M. L. Wheeler, Theodore Sammis
Water Uptake By Plants Under Desert Conditions, H. K. Qashu, D. D. Evans, M. L. Wheeler, Theodore Sammis
Memorandum
No abstract provided.
Curlew Valley Validation Site Report, David F. Balph
Distillation-Condensation Of Water And Nutrient Movement In A Desert Ecosystem, N. Stark
Distillation-Condensation Of Water And Nutrient Movement In A Desert Ecosystem, N. Stark
Memorandum
No abstract provided.
Terrestrial Models: Introduction And Main Programs, D. W. Goodall, C. Gist
Terrestrial Models: Introduction And Main Programs, D. W. Goodall, C. Gist
Memorandum
No abstract provided.
Terrestrial Models: Plant Processes (Version I, Ii, Iii), W. Valentine
Terrestrial Models: Plant Processes (Version I, Ii, Iii), W. Valentine
Memorandum
No abstract provided.
Terrestrial Models: Animal Processes (Versions I, Ii), S. Payne
Terrestrial Models: Animal Processes (Versions I, Ii), S. Payne
Memorandum
No abstract provided.
Sensitivity Analysis, I. Noy-Meir, D. Goodall
Aquatic Models, Wayne Minshall
Decomposition And Mineralization In An Artemisia Tridentata Community In Northern Nevada, Peter L. Comanor
Decomposition And Mineralization In An Artemisia Tridentata Community In Northern Nevada, Peter L. Comanor
Memorandum
No abstract provided.
Measurements Of Carbon And Nitrogen Changes In Soil, Eugene E. Staffeldt, Kristina Bemond Vogt
Measurements Of Carbon And Nitrogen Changes In Soil, Eugene E. Staffeldt, Kristina Bemond Vogt
Memorandum
No abstract provided.
Prediction Of Plant-, Soil- And Air-Temperature On A Microscale In The Desert, Inge Dirmhirn, Frank Eaton
Prediction Of Plant-, Soil- And Air-Temperature On A Microscale In The Desert, Inge Dirmhirn, Frank Eaton
Memorandum
No abstract provided.
Diest, Food Preference And Reproductive Cycles Of Some Desert Rodents, Russell P. Balda, Clark E. Franz, O.J. Reichman, Kent M. Van De Graaff
Diest, Food Preference And Reproductive Cycles Of Some Desert Rodents, Russell P. Balda, Clark E. Franz, O.J. Reichman, Kent M. Van De Graaff
Memorandum
No abstract provided.
Consumption, Utilization And Modification Of Nutritional Resources By The Jackrabbit (Lepus Californicus) In The Mohave Desert, V.H. Shoemaker, K.A. Nagy, W.R. Costa
Consumption, Utilization And Modification Of Nutritional Resources By The Jackrabbit (Lepus Californicus) In The Mohave Desert, V.H. Shoemaker, K.A. Nagy, W.R. Costa
Memorandum
No abstract provided.
Chronic Toxicity Of A Copper, Cadmium And Zinc Mixture To The Fathead Minnow (Pimephales Promelas Rafinesque), John G. Eaton
Chronic Toxicity Of A Copper, Cadmium And Zinc Mixture To The Fathead Minnow (Pimephales Promelas Rafinesque), John G. Eaton
United States Environmental Protection Agency: Publications
Fathead minnows were exposed to a series or concentrations of a copper, cadmium and zinc mixture during a 12.5 month chronic test in water of 200 mg 1-1 total hardness. The metal concentrations in the mixture were selected on the basis of results obtained during previous chronic exposures to each of the metals individually in the same water. Strict summation of the chronic toxicities of the metals was not indicated when they were tested in combination. Toxic effects of the mixture attributable to copper appeared to be increased, but that attributable to cadmium was reduced. The effects thought to …
Captan Toxicity To Fathead Minnows (Pimephales Promelas), Bluegills (Lepomis Macrochirus), And Brook Trout (Salvelinus Fontinalis), Roger O. Hermanutz, Leonard H. Mueller, Kenneth D. Kempfert
Captan Toxicity To Fathead Minnows (Pimephales Promelas), Bluegills (Lepomis Macrochirus), And Brook Trout (Salvelinus Fontinalis), Roger O. Hermanutz, Leonard H. Mueller, Kenneth D. Kempfert
United States Environmental Protection Agency: Publications
The toxic effects of capt an on survival, growth, and reproduction of fathead minnows (Pimephales promelas) and on survival of bluegiIIs (Lepomis macrochirus) and brook trout (Salvelinus fontinalis) were determined in a flow-through system. In a 45-week exposure of fathead minnows, survival and growth were adversely affected at 39.5 μLg/Iiter. Adverse effects on spawning were suspected but not statisticaIly demonstrated at 39.5 and 16.5 μLg/Iiter. The maximum acceptable toxicant concentration (MATC), based on survival and growth, lies between 39.5 and 16.5 μLg/liter. The lethal threshold concentration (LTC) derived from acute exposures was 64 μLg/liter, …
Chronic Effect Of Low Ph On Fathead Minnow Survival, Growth And Reproduction, Donald I. Mount
Chronic Effect Of Low Ph On Fathead Minnow Survival, Growth And Reproduction, Donald I. Mount
United States Environmental Protection Agency: Publications
Fathead minnows (Pimephales promelas Rafinesque) were continuously exposed to reduced pH levels of 4.5, 5.2, 5.9, 6.6 and 7.5 (control) during a 13-month, one-generation test. Survival was not affected, even at the lowest pH tested. Fish behavior was abnormal, and fish were deformed at pH 4.5 and 5.2. Egg production and egg hatchability were reduced at pH 5.9 and lower, and all eggs were abnormal. A pH of 6.6 was marginal for vital life functions, but safe for continuous exposure. Free carbon dioxide, liberated by the addition of sulfuric acid to reduce the pH, may have had an unknown …