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The Extrafloral Nectaries Of Ipomoea Carnea (Convolvulaceae), Kathleen H. Keeler

School of Biological Sciences: Faculty Publications

lpomoea carnea (Convolvulaceae) possesses two types of extrafloral nectaries, located on the petiole and on the pedicel. These secrete a complex nectar containing sugars and amino acids. The insects attracted to the extrafloral nectaries are predominantly ants and they are relatively abundant throughout the year. A number of incidents of plant defense as a result of the presence of extrafloral nectary visitors at the extrafloral nectaries of I. carnea were observed and are consistent with the ant-guard theory of the function of extrafloral nectaries.

Fisheries Report No 30 - The Wildlife Of The Proposed Karroun Hill Nature Reserve, Western Australia, W. K. Youngson, N. L. Mckenzie

Fisheries Research Reports

Plants and vertebrate animals were recorded from a proposed 300 000 ha nature reserve centred on Karroun Hill in the goldfields of Western Australia (30°03'S; 118°02'E).

Plant communities are described in terms of their structurally important species and related to local physiography.

Fifteen native mammal species, sixty-four bird species, twenty-four reptile species and one amphibian were recorded. Annotated lists are presented. The wildlife reflects the transitional nature of the Coolgardie Botanical District. Both Eremean and South Western Province species were recorded.

Research For Connecticut By The Storrs Agricultural Experiment Station

Storrs Agricultural Experiment Station

No abstract provided.

Beach Vegetation And Oceanic Processes Study Of Popham State Park Beach, Reid State Park Beach, And Small Pt. Beach, Philip Trudeau, Paul J. Godfrey, Barry S. Timson

Maine Collection

Beach Vegetation and Oceanic Processes Study of Popham State Park Beach, Reid State Park Beach, and Small Pt. Beach

by Philip Trudeau, Paul J. Godfrey and Barry S. Timson

"Prepared Under Cooperative Agreement Between the Maine Department of Conservation and the Soil Conservation Service, United States Department of Agriculture, September 1977."

On Cover: Time and Tide Resource Conservation and Development Project.

Contents: List of Figures / List of Tables / Introduction / Plant Community Research / Oceanic Processes / Historic Analysis of Barrier Beach Movement and Erosion / Dune Dynamics / Suggestions for Long Term Management / Appendices A - …

The Prairie Naturalist Vol. 9, Nos. 3 And 4. September-December, 1977

The Prairie Naturalist

UPLAND NESTING OF AMERICAN BITTERNS, MARSH HAWKS, AND SHORT-EARED OWLS ▪ H. F. Duebbert and J. T. Lokemoen

ROADSIDE NESTING BY PRAIRIE GROUSE IN NORTHWEST MINNESOTA ▪ W. D. Svedarsky

BOHEMIAN WAXWING POPULATIONS AND WINTER ECOLOGY IN NORTH DAKOTA ▪ E. L. Bakke

AGEING ARCHAEOLOGICAL BISON BY DENTAL ANNULI ▪ J. C. Pigage and M. G. McKenna

COMPARISON OF COYOTE AND COYOTE X DOG HYBRID FOOD HABITS IN SOUTHEASTERN NEBRASKA ▪ B.R. Mahan

NOTES

Abnormal Mid-May Occurrence of White-fronted Geese in Sheridan County, North Dakota ▪ D.P. Kibbe and J. A. Roppe

Common Grackle Preys on Spotted Sandpiper Chick ▪ …

Report On Kellogg Rural Adjustment Unit (Krau) Conference, Peter Eckersley

All other publications

The aim was for the 170 attenders to define how much productivity increases could help farmers in the main rural industries, and what size increases are likely in the foreseeable future (especially the next 5 years recommend feasible Government and industry action to stimulate increases in farm productivity.

The Plant Communities Of Arches National Park, John Stevens Allan

Theses and Dissertations

Arches National Park, located in southeastern Utah, lies in a transition zone between the southwestern hot desert and the western cold desert, but it is floristically most similar to the hot desert. The major plant communities are as follows: Juniper-pinyon, blackbrush, grasslands and sand dune association. Other community types occur but occupy very limited areas. All of the communities studied have a high degree of uniqueness and merit recognition as separate entities. Blackbrush showed the greatest overall similarity to other communities and was most similar to the sand dune communities. The hanging gardens were the most distinctive and covered the …

Plant Dioecy, Ecology, Evolution And Sex Reversal, D. Carl Freeman

Theses and Dissertations

The distribution of dioecious species among forty-four plant communities of western United States was examined. The dioecious habit is most prevalent in harsh environments. In many communities, over 20 percent of the species and 40 percent of the individuals are dioecious. Dioecy is most common among woody species which are pollinated by wind. It is concluded that inbreeding depression alone is insufficient to account for all known facts concerning dioecy. Disruptive selection acting upon differential success of gametes produced on sites of differing quality appears to have played a major role in producing separate sexed individuals. Dioecious species reported to …

Tree To Chips To Red Meat To Steaks, It Serves As Emergency Livestock Feed, Les Kamstra

Aspen Bibliography

We must be resourceful. Our "natural" resources are becoming scarcer every day, while waste products mushroom in dumps, along roadsides, in the water and air.

A Seasonal Study Of Phytoplankton Composition Abundance And Productivity In Back Bay, Virginia, Robert Ringgold Comegys

Biological Sciences Theses & Dissertations

Phytoplankton samples were collected monthly (August 1974-June 1975) at two stations in the Back Bay system of southeastern Virginia. Measurements of phytoplankton productivity and potentially influencing environmental parameters (water and air temperature, turbidity, depth, pH, salinity, dissolved oxygen) accompanied sample collections. A total of 106 phytoplankton species, representing six algal divisions and 54 genera were identified. Cyanophyta species were dominant at both stations in the warmer months of August, September, October, and June, and in April at one station only. In all remaining months, Chlorophyta species were dominant, indicating a seasonal shift in phytoplankton composition during winter and spring. The …

Alfalfa Response To Varying Rates Of Phosphorus And Potassium Fertilization On Deep, Red, Limestone - Derived Soils Of The Pennyroyal Area In Kentucky, H. C. Vaught, Kenneth L. Wells, K. L. Driskill

Agronomy Notes

The Western Pennyroyal area of Kentucky consists largely of deep, well-drained limestone-derived soils occurring on an undulating to rolling landscape. A thin loess mantle overlies the limestone residuum in many areas. Soils on these landscapes are capable of good crop production, providing the basis of the rather intensive grain-hay- tobacco-livestock farming systems common to the Pennyroyal area. Because of the well-suited physical characteristics of these soils, alfalfa is a very important hay crop to this area.

The Effect Of Carbon Dioxide Concentration On Calcification In The Red Coralline Alga Bossiella Orbigniana, A. Dwight Smith

Loma Linda University Electronic Theses, Dissertations & Projects

The relationship between various experimental concentrations of CO2 and calcification was studied by measuring Ca-45 incorporation into the crystalline matrix. Air containing CO2 at partial pressures (Pc02) of 0.04% to 5.5% was bubbled through synthetic sea water in incubation vessels. The resultant pH values ranged from 8.7 to 6.5. The relative concentrations ofCO2, HCO3 , and CO2— 3 were calculated from the measured ' pH—PCO2 combinations. Calcification was correlated positively with HCO expressed as percent of total carbon. Maximum calcification of about one—third above normal occurred between 0.1% and 1.0% P CCOO22 At 0.26% P calcification increased as increments of …

The Prairie Naturalist Volume 9, No. 2. June 1977

The Prairie Naturalist

PROPAGULE DISPERSAL AMONG FOREST ISLANDS IN SOUTHEASTERN SOUTH DAKOTA ▪ J. W. Ranney and W. C. Johnson

GENERAL WEATHER CONSIDERATIONS FOR THE PRESCRIDED BURNING OF PRAIRIE IN NORTHWEST MINNESOTA ▪ W. D. Svedarsky and R. W. Sands

YELLOW-CROWNED NIGHT HERONS SIGHTED IN NORTH DAKOTA ▪ D. G. Jorde, G. L. Krapu, and R. K. Green

Some Intermountain Endemics, Arthur H. Holmgren

Faculty Honor Lectures

A growing concern for the welfare of endangered or threatened plant and animal species has developed during the past few years, coinciding with an awareness of mankind's deleterious influence on the environment. Technological man has altered vast areas of the earth's surface to such an extent that many species have been endangered or made extinct. Transcontinental highways, shopping malls, industrial parks, home sites where they shouldn't be, and huge acreages turned over by the plow for monocultures, have taken a toll on our native vegetation to such an extent that many species have either lost their diversity or have disappeared. …

Rodent Density And Species Composition In The Snake River Birds Of Prey Natural Area, Idaho, Jon R. Montan Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Rodent densities were estimated in the major vegetation types of the Snake River Birds of Prey Natural Area in 1975 and 1976 by a combination of live-trapping and kill-trapping. Only deer mice (Peromyscus maniculatus) were numerous enough to permit reliable density estimates. Relative densities of other rodent species were indicated by kill-trap capture rates. Densities of deer mice correlated well (r = 0.99) with kill-trap capture rates. The use of kill-trapping in place of live-trapping in 1976 permitted extensive sampling throughout the 1930 km² study area. Differences were found among the major vegetation and land-use types in …

The Influence Of Certain Growth Hormones On Plant Growth At Cold Temperatures, Michael D. Salvesen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Studies were conducted to determine the effect of externally applied growth hormones on winter rye (Secale cereale var. cougar). The rye was grown under the snow in a specially prepared tunnel on a mountain side near Logan, Utah. These plants showed a remarkable ability to grow at 0°C. Three growth hormones, kinetin, gibberellic acid (GA), and auxin (indole-3-acetic acid) were externally applied to rye seedlings growing in the tunnel. These seedlings were alter weighed, measured and tested for soluble protein content. The three hormone treatments had no significant effects on the fresh weights or shoot lengths of the …

Multiple Forms Of Deoxyribonucleic Acid-Dependent Ribonucleic Acid Polymerase In Barley Leaves (Hordeum Vulgare L.), Sachchidananda Javali

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Ribonucleic acid polymerases (E.C. 2.7.7.6) have been solubilized form whole green leaves of barley (Hordeum vulgare L.). Three major forms of the solubilized enzyme have been isolated by sonication in high ionic strength buffers, cation and anion exchange chromatography, and agarose gel permeation chromatography and designated I, II, and III. The enzyme fractions appear analogous to the Class I, II, and III ribonucleic acid polymerases defined in other eucaryotic systems. The ionic strength optima, amatoxin sensitivity, and relative activities with denatured calf thymus deoxyribonucleic acid were different for Class I, II, and III polymerases.

A simple, rapid, reproducible method …

Bulletin 3990 - The Narrow-Leafed Lupin In Western Australia, J. S. Gladstones

Bulletins - 3000 - 3999

Lupins are new as a commercial crop, but may be very old as a food plant. Types of the Mediterranean white lupin (Lupinus albus L.) have been part-developed and used as a subsistence crop for 3 000 years or more. Likewise the pearl lupin (L. mutabilis Sweet) has been grown for many centuries in the Andean Highlands of South America. In both cases the seeds are boiled and steeped in water for several days to rid them of their bitter, somewhat toxic alkaloids. They are then used directly as a valued protein source in human diets.

Growing Degree Days Predictions For Corn And Sorghum Development And Some Applications To Crop Production In Nebraska, R. E. Neild, M. W. Seeley

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The concept of growing degree days (GDD) originated with observations by Reamur (1735) that plant development is more closely related to the temperature accumulated to a given stage than with time alone. It was not until nearly 200 years later, however, that Merriam (1894), Livingston (1916) and Klages (1942) began to use temperature accumulations in plant distribution studies and in crop geography. In the early 1950's, a system involving growing degree days became widely used in the canning industry to schedule plantings and thus control time of harvest of rapidly maturing vegetables. This system provided a more precise control of …

Southern Regional Beef Cow-Calf Handbook: Hay Feeding Systems, Garry D. Lacefield, J. Kenneth Evans, Joe Burns

Agriculture and Natural Resources Publications

Forages (pasture, hay and silage) constitute the most feed consumed by beef cattle. The most convenient approach in producing feed is to provide quality pastures during as much of the year as possible and permit animals to graze growing forage to the maximum. To provide a year-round feed supply, however, one must usually rely on stored feed when growth is inadequate to meet animal needs.

Hay is the most common source of stored feed used in most beef cattle operations. Nutrients provided in hay harvested at the proper stage of plant growth and undamaged by weather usually cost less to …

Certain Edaphic And Biotic Factors Affecting Vegetation In The Shadscale Community Of The Kaiparowits Area, Vane Orlan Campbell

Theses and Dissertations

A study area on the southern extensions of the Great Basin cold desert (Kaiparowits Basin, Utah) was selected which has had varying amounts of disturbance. Areas with similar slope and exposure in the Shadscale community were sampled. At each site, soil samples were collected and percent sand, percent clay, percent silt, soluble salts, and hydrogen ion concentrations were measured. Cluster analysis based on percent frequency of the perennial species showed that eight groups or sub-communities were definable within the area sampled. Patterns within the vegetation were shown to be independent with the use of cluster analysis. Discriminant analysis on soil …

Bulletin No. 22: Our Dynamic Tidal Marshes: Vegetation Changes As Revealed By Peat Analysis, William A. Niering, R. Scott Warren, Carolyn G. Weymouth

Bulletins

12 pp. 1976. Description of a method for sampling peat and identifying plant remains in order to dcoument vegetation change on tidal marshes.

Serradella : A Pasture Legume For Sandy Soils, John Sylvester Gladstones, N. R. Mckeown

Journal of the Department of Agriculture, Western Australia, Series 4

French serradella grows well on many of the sandy soils along the west coast where other species such as sub clover often fail, and produces excellent feed both when green and in the dry state.

Establishment is easy because of its soft seedednedd. However the same characteristic, together with its erect growth habit, means that persistence under grazing has been poor.

This paper looks at work being done to understand the requirements to maximise results from serradella and develop better varieties.

Polythene Storage Improves Lupin Seed Germination, G H. Walton

Journal of the Department of Agriculture, Western Australia, Series 4

Seed storage trials indicate a practical means of maintaining sandplain lupin seed at a moisture content that limits hard seed development, leading to a commercially acceptable germination rate in the following season.

Movement Of Soil Nitrate Through A Pembroke Soil As Affected By Tillage Method And Time Of Nitrogen Application, Noel T. Johnston

Masters Theses & Specialist Projects

Of all the plant nutrients, nitrogen has been subjected to the most extensive study. The amount of inorganic nitrogen in the soil is small while the quantity needed annually by crops is comparatively large. Of the macronutrients usually applied in commercial fertilizers, nitrogen seems to have the quickest and most pronounced effect on plant growth.

In applying the nitrogen fertilizer for crop use, one must be concerned with placement, form, and availability, and with keeping the fertilizer where it is placed throughout the critical part of the growing season. The nitrogen supply molded by non-leguminous plants is of extreme importance …

Vegetation And Environmental Features Of Forest And Range Ecosystems, George A. Garrison, Ardell J. Bjugstad, Don A. Duncan, Mont E. Lewis, Dixie R. Smith

Aspen Bibliography

This is one of the reports developed as part of the Forest-Range Environmental Study (FRES) of the Forest Service, U.S. Department of Agriculture. This report presents descriptive sketches of 34 soil-vegetation units, called ecosystems. These cover all the land area of the 48 contiguous States.

A New Approach To Grain Insect Control, G D. Rimes, M. T. Sexton

Journal of the Department of Agriculture, Western Australia, Series 4

Western Australian farmers now have a legal responsibility to control stored grain insects on their farms.

Ten species of insects, usually referred to collectively as 'weevils', have been 'declared' under the Agriculture and Related Resources Act.

In Western Australia, grain storage insects are not found in standing cereal crops. Thus, it should be possible to set up a clean delivery "pipeline" from the paddock to the C.B.H. bin.

Native Plants : Water Savers In The Garden, K S. Cole

Journal of the Department of Agriculture, Western Australia, Series 4

The climate of Western Australia may be one of the best in the world for people but it is a difficult one for many of our imported, and common garden plants. as a consequence, some 70 per cent of our summer water usage is for gardens and lawns.

This is not the sort of statistic that we should accept easily or happily.

There is a solution to this problem: a new approach to home gardening is required.

The new garden is based on W. A.'s own colourful native plants, which are adapted to mild winters, hot dey summers and poor …

The Years 1960–1977, Lee W. Lenz

Aliso: A Journal of Systematic and Floristic Botany

In the years 1960–1977, Rancho Santa Ana Botanic Garden fully embraces its role as teaching institution and as advocate and guardian of the native California flora. Expansion of the living collection, landscaping of the grounds, public education, herbarium and library activities, and publication output are detailed. To accommodate a growing number of graduate students, the faculty—consisting of Richard K. Benjamin, Sherwin Carlquist, and Lee. W. Lenz—is joined by Peter H. Raven, Ronald Scogin, John P. Simon, and Robert F. Thorne.

The Awakening Years, Lee W. Lenz

Aliso: A Journal of Systematic and Floristic Botany

This article sketches the horticultural climate of southern California in ca. 1900–1930, documenting a rising interest in California native plants. Influential figures in the realm of California botany and horticulture are introduced, especially Theodore Payne. Pomona College, Claremont, expresses an interest in the establishment of a botanical garden.