Life Sciences Commons^™

Effects Of Wastewater Discharges On Periphyton Growth In Lake Mead, Nevada-Arizona, Marsha Korb Morris

Publications (WR)

A study of the effects of secondary-treated wastewater on periphyton growth in Lake Mead, Nevada-Arizona was conducted from September 1979 to December 1980. Periphyton ash-free dry weight, chlorophyll-a, dominant species composition, and alkaline phosphatase activity were measured on fiberglass substrates. Substrates were incubated for two to four weeks in littoral and limnetic habitats. Physical and chemical variables and phytoplankton chlorophyll-a were measured concurrently.

Transparency increased with increasing distance from the discharge. Secchi depth ranged from 0.75 m at the discharge confluence (station 2) in August, to greater than 20 m at the most distant stations (stations 9 and 10) in …

An Ecological Analysis Of Relic Diatoms In Sediments Of Las Vegas Bay, Lake Mead, David Ross Hetzel

Publications (WR)

Relic diatoms in sediments of the inner Las Vegas Bay, near the Las Vegas Wash sewage inflow, were examined in order to assess historic trophic conditions in this area of Lake Mead. Diatom sedimentation rates and ratios of Araphidineae/Centrales (A/C) diatom groups were determined from sediment cores collected in the old wash channel 1.5 km from the sewage inflow (station 2), in a small cove 1.5 km further downstream (station 3) and in an adjacent embayment off Gypsum Wash (station 4). Diatom sedimentation rates generally increased from the bottom to the top of each core, but pronounced minima existed at …

Quantitative Reef Assessment Studies In Bermuda: A Comparison Of Methods And Preliminary Results, Richard E. Dodge, Alan Logan, Arnfried Antonius

Marine & Environmental Sciences Faculty Articles

To compare in quantitative terms both ecological characteristics of the stony coral fauna at various reef sites in Bermuda and available assessment methodologies, we present a study of four separate methods at each of three reef sites. Three plotless (Intersected-length, Quarter point, Point) and one quadrat (Belt-quadrat) methods were employed. Each technique gave similar results but had inherent advantages and disadvantages which involve trade-offs in quantity and type of information generated and time required for use.

Pooling of method results revealed that total coral coverage was highest at North Rock (26%), intermediate at Three Hill Shoals (17%), and lowest at …

Grapevines - Herbicide Tolerance, Sorrel - Effects Of Nutrients, Bracken - Wick Application, Pennyroyal - Control, Blackberry – Control., John Moore

Experimental Summaries - Plant Research

Grapevines - Herbicide tolerance Sorrel -Effects of Nutrients Bracken- Wick application Pennyroyal - Control Blackberry - Control 82 MT 57, 82 MT 58, 82 MT 59, 81 MT 60, 80 KA 40, 80KA39, 82 AL 48, 80 AL 10, 81 AL 101,

Sorrel, Dicamba Soil Residual Effects, Glean, Veldt Grass, Declared Weeds Blackberry, Pattersons Curse, Penny Royal, J Moore

Experimental Summaries - Plant Research

CONCLUSIONS This trial has confirmed the field observation that 2,4,5-T whilst giving good initial control of Pennyroyal, fails after a number of years. Round up has a far longer term effect. This can only be attributed to a more complete initial kill as both herbicides are essentially non residual. Further work needs to be conducted on Round up in combination with soil residual chemicals or multiple applications to overcome the problem of reinfestation from seed reserves. 81A1 -01

1. Phosphorus Sources Trials 2. Miscellaneous Trials, J W. Bowden, R J. Lunt, M J. Baker

Experimental Summaries - Plant Research

Sources of phosphorus trials - 1982 results. Pasture Trials, 76MT10, 77MT1, 77MT2, 76BU1, 77EI. Cropping Trials, 76WH14, 76WH10, 76WH9, 76N4, 76LG6, 80BA6. Trials not assessed in 1982, 77WH2 Pasture phase. Miscellaneous trials. Long term trials, 66M30, 65Al, 65A1, 65C5, 69WH15, 75LG26, 81N044, 78BA7. 1982 Trials, 82N04, 82BA2, 82N02, 82N05, 82WH2, 81N044.

Foliar Diseases Of Wheat., A. G.P. Brown

Experimental Summaries - Plant Research

Leaf diseases in the wheatbelt. Fungicides to control Septoria nodorum. Fungicide rate. Fungicides on yellow spot. Effect of stubble residues on septoria. Septoria: economic control on farm crops. 82Ba38 82BA37

Low Rainfall Pasture Project., M. Ewing

Experimental Summaries - Plant Research

1. Variety Trials - large plots: 82ME47, 82ME48, 82ME49, 82ME50, 82ME51, 82M27, 82N044, 82N31, 82TS27, 82LG32, 82TS32 2. Variety Tests – rows: 82M40, 82M44, 82M45, 82M49, 82M59, 82ME77. 3. Pasture Establishment and Re-establishment: 82M41, 82M42. 4. Lupins - Rates of P. 82ME64.

Plant Viruses., G. D. Mclean, L. K. Price, J. A. Weir, J. M. Allen, P. Fievez, P. A. Portmann, R. J. Mclean, J. D. Sandow

Experimental Summaries - Plant Research

Clover viruses, 82ES38, 82AL47, 82MA19, 82BR19, 82BY29; 82BU5, 82HA9. Lupin virus, diseases. Barley yellow dwarf virus, 82AL46, 82AL51, 82B10, 82BA33, 82BR16, 82BR18, 82C29, 82E27, 82ES37, 82ES40, 82JE19, 82JE20, 82KA33, 82KA34, 82ABI3, 82MA18, 82MN22, 82MT34, 82NA32, 82WH28,82B8, 82MN17, 82E24, 82MT30, 82E25, 82MN18, 82MT31, 82B9, 82ABI2, 82BA31, 82C26, 82JE17, 82WH27, 82AL45, 82BR17, 82ES39, 82MA1, 82MA117, 82MT33,

Summary Of Experimental Results., J. Peirce, B. J. Rayner

Experimental Summaries - Plant Research

81GE22. 81GE28, soursob control. 81N056, in cereals. 81N057. 82LG34, chemical x water volumes (broadleaved weeds). 82LG36, hoegrass, rate x volume (ryegrass). 82N039, crop damage in wheel tracks x spraying. 82N043, ropewick for cape tulip control. 82NR3, patersons curse control in hay crops. 82NR8, patersons curse control in hay crops. 82N055, hoegrass, rate x volume (wild oats). 82N056, chemical x volume (broadleaved weeds). Demonstration, soursob control in cereals. 82ME44, matricaria control in cereals. 82ME57, crop damage in wheel tracks x spraying. 82ME59, chemical x volume (broadleaved weeds). 82ME60, hoegrass, rate x volume (ryegrass). 82ME81, matricaria control in pastures. 82ME86, cereal tolerance …

Investigations Of Ryegrass Toxicity., Brian A. Stynes.

Experimental Summaries - Plant Research

Control of spray topping, 82KA28. Emergence of nematode larvae from galls, 82KA29, 82NA33, 82M019. Effects of long term cropping, 81KA57. Long term effects of spray topping, 81KA58. Development of toxicity, 81KA47, 81NA47, 81M047.

Diseases Of Lupins And Lupinosis., P M. Wood

Experimental Summaries - Plant Research

Lupin diseases, 82 TS 30, 82 TS 29, 82 TS 28, 82 GE 24, 82 ME 45, 82 ME 46, 82 BR 20,

Benthic Testacida (Rhizopoda, Protozoa) Of Lake Washington, Brevard County, Florida, Haydee Lena

Ocean Engineering and Marine Sciences Faculty Publications

Benthic Testacida from sediments of Lake Washington were studied. The Testacida were extracted using standard foraminiferologic techniques. The determined taxa were photographed using scanning electron microscopy. Twenty-one taxa were found. The majority were cosmopolitan and the most abundant were Difflugia pyriformis and Centropyxis compressa. The Testacida guild was similar to that previously studied in other American and European lakes. However, the type and size of the species were different from those found in soil and mosses.

Grain Legume Agronomy Programme., G. H. Walton

Experimental Summaries - Plant Research

Lupin agronomy, Series l - Growth factor interactions. 82GE18, 82GE19, 82N038, 82N18, 82MA13. Lupin agronomy, Series 2 - Harvest index response to density 82GE20, 82M24. Lupin agronomy, nutrition, 82GE21, 82MA14, 82M017. Erregulla lupin rotation plots, 81M027, 81M029, 81M030. Grain legumes for wheatbelt rotations, 81GE6,81TS3, 81ME3, 81M05, 81MO14. Grain legume species trials, 81E30, 82NA31, 82JE23, 82E26, 82LG28. Low rainfall, medium soils pH 5.5 to 7.0, 82ME41, 82ES35, 82ES36, 82TS25, 82ME39. Sites that failed, 82GE23, 82ME40, 82JE18. Field pea agronomy, 82LG27, 82LG26. Oat/lupin mixtures for grain feed 82Bu9, 82Bu10, 82AL34. Oat/pea mixtures for hay, 82PE21, 82KA37. Fababean nodulation, 82MD16, 82MN25.

Sulphur Nutrition Of Pastures, Phosphorus And Potassium Nutrition Of High Rainfall Pastures On Deep Sands And Soil Acidity - High Rainfall Pastures., J. S. Yeates., M. F. Clarke

Experimental Summaries - Plant Research

Sulphur - high rain fall areas. Rates and time of application of sulphur as superphosphate to pastures. 79AL2, 79AL23, 79AL41, 82BY7, 82BY8, 82PE2. Sulphur rundown on heavy soils - 81BY1. Sources, rates, time of application of sulphur to pastures. 80AL1, 80AL4, 81AL3, 81AL4. Sulphur - low rainfall areas. Sulphur on pastures 80JE16/17, 82AL9, 82KA4. Sulphur on crops 82ME68 (with G Fosberry). Phosphorus. Sources, rates, time of application of phosphorus on high rainfall deep sand pastures. 80AL2, 80ALS, 80AL15, 81AL5, 81KE2, 81MA4, 82AL10. Potassium. Sources, rates, time of application of potassium on high rainfall deep sand pastures. 80AL3, 80AL6, 81AL7, 81AL8. …

1. Doublegee Dormancy 2. Lupins - Chemical Tolerance Of Kiev Mutant 3. Lupins - Simazine And Diuron Plus Mixtures 4. Lupins - Pp009 5. Lupins - New Herbicides 6. Lupins - Ssh 0860, D. J. Gilbey, R. Klemm

Experimental Summaries - Plant Research

Doublegee seed longevity x cultivation - 75WH65, Doublegee seed longevity x depth- Effect of burial on longevity of doublegee achenes - 75WH66, 76C9, 76KA8, 82 N 25, 82 N 24, 82 N 30, 82 LG 30, 82 LG 33, 82 KA 35, 82 KA 36, 82TS38, 82GE33, 82TS37, 82ME62, 82BA42, 82GE35, 82TS36, 82 NO 62, 82 ME 83, 82GE36, 82TS35, 82ME63B, 82M038, 82GE32, 82BA41, 82ME63A,

Pasture Species Investigations High Rainfall Area., D. A. Nicholas

Experimental Summaries - Plant Research

Selection of an alternative to cv Woogenellup clover. 79MT48, Mount Barker research station. 79MA13, Palgarup. 80AL59, Narribup. 80BR18, Mayanup. 80BU7, Vasse. 81NA37, North Bannister. 81PE6, Byford. 82NA36, West Wandering. 82AL72, South Stirlings. Screening of midseason to late maturing lines of subterranean clover. 82BU12, Karridale. 82AL71, Cuthbert.

Deep-Sea Bottom Fishes Caught On The 14th Cruise Of The R/V Akademik Kurchatov, T. S. Rass, V A. Grigorash, V. D. Spanovskaya, Y. N. Shcherbachev

Reports

Captures of deep-sea fish in waters of the American Mediterranean Sea and adjacent Bahama-Bermuda region of the Atlantic Ocean prior to our work were performed by a series of expeditions: Coast and Geodetic Survey of the USA ("Blake," 1877-1880), New York Zoological Society ("Zaca" and "Arcturus," 1929-1931), Bingham Oceanographic Laboratory of Yale University, USA ("Pawnee," 1927), the Danish Carlsberg Foundation ("Dana," 1920-1922 and 1928-1930), Bureau of Commercial Fisheries, USA ("Oregon," "Oregon II" and others between 1950 and 1960), and the University of Miami ("Pillsbury," 1969). However, only the latter of these expeditions working in the region of the Puerto Rico …

An Evaluation Of Nutrient Sources To Onslow Bay, North Carolina, Larry P. Atkinson, Leonard J. Pietrafesa, Eileen E. Hofmann

CCPO Publications

Hydrographic and current meter data from Onslow Bay, North Carolina, were examined to determine the relative importance of various nutrient sources.

Upwelled Gulf Stream water is the major source of nutrients while rivers represent a minor, if not insignificant, source. In the summer during stratified conditions, the upwelled water penetrates across the shelf, but in the winter the upwelled water is restricted to the outer shelf. Nitrate flux across the 40 m isobath was calculated from continuous temperature and current records. Flux during the summer of 1976 was 2 μM m² sec^-1 which is considerably less than flux …

Soil Physical Conditions And Crop Production, A. P. Hamlin

Experimental Summaries - Plant Research

1a. Differences in water balance and resultant crop growth related to soil structure: Merredin red brown solonized earth. 1b. Soil structure effects on crop growth (Merredin). 77M13, 77M56. 2. Water balance studies under wheat on Wongan loamy sand (82WH8)

Oilseed Agronomy., A. G. Mckay

Experimental Summaries - Plant Research

Time of nitrogen application on rapeseed, 82MT39. Time of sowing x rate of nitrogen on rapeseed, 82MA16, 82AL42. Oilseed phenology trials brassica species, 82A5, 82BA40, 82C35, 82E30, 82M33, 82MT36, 82WH29. Rapeseed windrowing, time of harvest, 82MT35, 82AL50. Shattering differences among rapeseed lines, 82MT37, 82WH30. Wesroona reselection evaluation, 82MT38. Triazine herbicide resistant rapeseed, 82GL12. Podquat on rape seed 82MT54. Sunflower varieties, winter sown, 82GE31

Phosphorus Nutrition On Leaching Sands., D. M. Deeley, S. M. Mason, B. G. Barker

Experimental Summaries - Plant Research

The excessive amounts of nutrients entering the Peel-Harvey Estuarine system have resulted in a marked increase in the abundance of algal species .within the estuary and reduced production on the sandy coastal soils of the catchment from which the nutrients are being leached. Recent stream samplings by D.C.E have shown that the deep grey Bassendean sands may be contributing up to 40 per cent of the total P loading in the Harvey River. Agriculture Department trials around Albany on similar sands have shown that up to 80 per cent of the bicarb extractable P may be lost after only 150 …

Alternative Pasture Species To Ryegrass For Areas Affected By Annual Ryegrass Toxicity., P. Dixon

Experimental Summaries - Plant Research

The aim of this project is to find alternative pasture species to ryegrass in areas which are affected by Annual Ryegrass Toxicity, 82 KA 45. Pasture species row evaluation, 82 KA 40. Pasture species row evaluation, 82 KA 41. Pasture species row evaluation, 82 KA 42. Pasture species row evaluation, 82 KA 43. Medic species trial, 82 KA 44. Medic species trial, 82 KA 45.

Experimental. Summary 1982 Trials., J E. Holmes, R J. Thomas

Experimental Summaries - Plant Research

Brome grass, Barley grass, Silver grass, Rye grass, Tank mixes for minimum tillage, Grass herbicides for pastures. 82N41, 82BA48, 82WH44, 82N38, 82GL39, 82Ge40, 82TS39, 82Lg43, 82Ba47, 82WH47, 82Lg44, 82Me65, 82Lg43, 82Nr10, 82MT46, 82N39, 82Ba45, 82LG48, 82M48, 82Na34, 82Ka38, 82WH45, 82Ba46 and 82N40.

Long Term Rotation Trials, Lupins, Wheat Rotation, Continuous Cropping With Nitrogenous Fertiliser, I. Rowland

Experimental Summaries - Plant Research

Long Term Rotation Trials, 66M29, 67C13, 67N4, 68E5, 68SG5, 73SG16. Lupins, wheat rotation, 79GE36, 80TS3, 82TS2. Continuous cropping with nitrogenous fertiliser, 80NA6.

Deep Ripping Effects On Cultivation Pans, Root Growth, Crop Growth, Soil Water Relations And Yields., D. Tennant

Experimental Summaries - Plant Research

Experiment programme. 77WH17, 82WH2, 82WH35, 82WH36, 81M52.