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University of Arkansas, Fayetteville

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Articles 571 - 600 of 632

Full-Text Articles in Ecology and Evolutionary Biology

Limnology Of Four Bauxite Open-Pit Lakes, George L. Harp, Ronald D. Hubbard Jan 1972

Limnology Of Four Bauxite Open-Pit Lakes, George L. Harp, Ronald D. Hubbard

Journal of the Arkansas Academy of Science

The aquatic flora and fauna and 18 physicochemical characteristics of four bauxite open-pit lakes were studied from September 1969 to August 1970. The least acid lake (pH 3.4-4.4) supported 49 different aquatic insects, plankton, and higher aquatic plants. The most acid lake (pH 2.7-3.2) supported only 26 different plants and animals. Bauxite open-pit lakes within the pH range studied appear to be as relatively unproductive as their coal strip-mine lake counterparts, with which they share physicochemical and biological characteristics. Benthic macrofaunal diversity and abundance appear to be related more closely to distribution and abundance of leaf detritus than to hydrogen-ion …

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Chrysomelidae Of Arkansas, E. Phil Rouse, L. N. Medvedev Jan 1972

Chrysomelidae Of Arkansas, E. Phil Rouse, L. N. Medvedev

Journal of the Arkansas Academy of Science

A list of Chrysomelidae of Arkansas is brought up to date by inclusion of species in the reference collection in the University of Arkansas, the collection in the Zoological Institute of Leningrad, and the private collection of L. Medvedev, as well as those reported in the literature. The list consists of 232 species, subspecies, and varieties and the ecological data where known. One new species and one new variety are included.

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Some Physiochemical Parameters And Phytoplankton Standing Crop In Four Northeast Arkansas Commercial Fish Ponds, Haldor Marvin Wilkes, John K. Beadles Jan 1972

Some Physiochemical Parameters And Phytoplankton Standing Crop In Four Northeast Arkansas Commercial Fish Ponds, Haldor Marvin Wilkes, John K. Beadles

Journal of the Arkansas Academy of Science

Physicochemical conditions and chlorophyll a standing crop were studied from July 1970 through June 1971 in four commercial catfish ponds at the Arkansas State University Experiment Farm near Walcott, Greene County, Arkansas. Determinations of dissolved oxygen, free carbon dioxide, total alkalinity, temperature, pH, transparency, and chlorophyll a standing crop were made at two-week intervals except during fish harvesting operations. One diurnal measurement of dissolved oxygen, free carbon dioxide, and temperature was conducted 25-26 June 1971. Increased oxygen concentrations coincided with increased chlorophyll α concentrations. Free carbon dioxide and chlorophyll α values varied inversely throughout the study. Diurnal concentrations of free …

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Failure To Establish Feral Coturnix Quail Populations In Arkansas In The Late 1950'S, Douglas A. James Jan 1972

Failure To Establish Feral Coturnix Quail Populations In Arkansas In The Late 1950'S, Douglas A. James

Journal of the Arkansas Academy of Science

Although Coturnix introductions failed in the late 1950's, it was learned in Arkansas that birds survived longest after autumn releases especially where fallow fields were numerous, that Coturnix favored grasslands whereas the bobwhite preferred shrublands, and that Coturnix occurred singly, pairing only in the breeding season.

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Build-Up Of Ions In Areas Of Lake Dardenelle As Affected By Stream Flow, Tom N. Palko Jan 1972

Build-Up Of Ions In Areas Of Lake Dardenelle As Affected By Stream Flow, Tom N. Palko

Journal of the Arkansas Academy of Science

The poultry industry in the Lake Dardanelle watershed annually introduces large amounts of poultry effluents into the system. This, plus the large concentrations of chloride ions that are introduced into the lake from salt deposits in the upper Arkansas River watershed, has definite effect on the limnological conditions of the lake. The buildup of chloride ions in areas of the lake depends on the amount of flow from streams into these parts of the lake. This stagnation phenomenon is especially noticeable in pocket areas which are generally cut off from the major influence of the river as it flows in …

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Herpetofauna Of Sylamore Ranger District, Ozark National Forest, Arkansas: Preliminary Report, John P. Schuier, James W. Dickson, Michael J. Harvey Jan 1972

Herpetofauna Of Sylamore Ranger District, Ozark National Forest, Arkansas: Preliminary Report, John P. Schuier, James W. Dickson, Michael J. Harvey

Journal of the Arkansas Academy of Science

A survey of the amphibians and reptiles of the Sylamore Ranger District, Ozark National Forest, Arkansas, was conducted from May 1969 through May 1972. The district is composed of 170,000 acres and includes parts of Stone, Baxter, Marion, and Searcy Counties. A total of 533 specimens was collected during the study. An additional 72 specimens in the collections of Memphis State University and Arkansas State University were examined. Forty-nine species were recorded from the study area. These consisted of 8 salamanders, 12 frogs and toads, 4 turtles, 6 lizards, and 19 snakes. Two species collected during the study, Scaphiopus holbrooki …

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Checklist Of Spiders Collected In Mississippi Compared With Preliminary Study Of Arkansas Spiders, Peggy Rae Dorris Jan 1972

Checklist Of Spiders Collected In Mississippi Compared With Preliminary Study Of Arkansas Spiders, Peggy Rae Dorris

Journal of the Arkansas Academy of Science

This paper presents a comparative list of spiders collected in the 82 counties of Mississippi and in a random sampling of the spiders of Arkansas. The Mississippi list includes 26 families with 263 species, whereas the Arkansas collection includes 24 families with 206 species. Various methods of collecting were used in an effort to sample all populations and to contribute to knowledge of the taxonomy both Mississippi and Arkansas.

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Studies Of Arundinaria: Experimental Induction Of Flowering And Additional Observation In The Field, Daniel L. Marsh Jan 1971

Studies Of Arundinaria: Experimental Induction Of Flowering And Additional Observation In The Field, Daniel L. Marsh

Journal of the Arkansas Academy of Science

Arundinaria has been observed for three successive seasons at a site near Amity, Arkansas. In advance of the 1971 flowering period rhizomes were taken from the field, pruned, and placed either in an environmental chamber or in the greenhouse in water or in sandy soil. Flowering occurred under each condition, but was most rapid and profuse in transplants growing in sandy soil in the greenhouse. Observations point to the possibility of induction of flowering or to the possible existence of an annually flowering race. Possible economic uses are considered.

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Survey Of The Vascular Flora Of Poinsett County, Arkansas, Michael I. Johnson Jan 1971

Survey Of The Vascular Flora Of Poinsett County, Arkansas, Michael I. Johnson

Journal of the Arkansas Academy of Science

A survey of the vascular flora of Poinsett County, Arkansas was made over a period of 13 months. The fifteen field trips taken were planned to include representative soil associations and geographic areas within the county. Three hundred sixty-three species and varieties from eighty-three families were collected or examined.

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Phosphorescent Animal Forms Of Arkansas, Peggy Rae Dorris Jan 1971

Phosphorescent Animal Forms Of Arkansas, Peggy Rae Dorris

Journal of the Arkansas Academy of Science

Two phosphorescent animal forms, Euryurus sp. and Centruroides vittatus, were collected with a black light in an attempt to collect phosphorescent spiders. Both the millipede and the scorpion were easily observed by the bright phosphorescent yellow color which glowed in the presence of the black light

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Relative Abundance, Seasonal Distribution And Taxonomy Of Sphingidae Of Northeast Arkansas, Charles L. Selman, Harvey E. Barton Jan 1971

Relative Abundance, Seasonal Distribution And Taxonomy Of Sphingidae Of Northeast Arkansas, Charles L. Selman, Harvey E. Barton

Journal of the Arkansas Academy of Science

A total of 38 species of sphingids, with keys and descriptions, are reported from Northeast Arkansas. Graphs and tables are presented to show relative abundance and seasonal distribution. Drawings of genitalia, fore tibiae, and forewings, as well as photographs of species in the key are included.

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Pre-Impoundment Limnological Study Of The Strawberry River In Northeastern Arkansas, Henry W. Robison, George L. Harp Jan 1971

Pre-Impoundment Limnological Study Of The Strawberry River In Northeastern Arkansas, Henry W. Robison, George L. Harp

Journal of the Arkansas Academy of Science

A study of pre-impoundment limnological characteristics of the Strawberry River was made from August, 1967 to June, 1968. Two collecting stations were established, one upstream which would not be inundated and a lower station which would be inundated when impoundment was complete. The Strawberry River was characterized by high alkalinity and pH, low carbon dioxide and turbidity, and adequate oxygen values. Plankton was characterized by limited numbers of Staurastrum, Gomphonema, and Rotatoria. Pool-riffle communities were ill-defined. Chironomidae, Oligochaeta and Ephemeroptera were dominant pool macroinvertebrates among 13 taxa collected. Of the 20 taxa collected in riffles Trichoptera, Ephemeroptera, Simuliidae and Chironomidae …

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Ichthyofaunal Diversification And Distribution In The Big Creek Watershed, Craighead And Greene Counties, Arkansas, James T. Jenkins, George L. Harp Jan 1971

Ichthyofaunal Diversification And Distribution In The Big Creek Watershed, Craighead And Greene Counties, Arkansas, James T. Jenkins, George L. Harp

Journal of the Arkansas Academy of Science

Big Creek is a relatively small deltaic stream, in northeastern Arkansas, in an area of intense cultivation. Recently it has been dredged in the interest of flood control. Lost Creek and Mud Creek are the major tributaries of Big Creek and collectively drain the Big Creek watershed. The streams were found to have relatively low alkalinity, moderate carbon dioxide, adequate oxygen values, and relatively high turbidity. Channeling of Big Creek and Lost Creek has effectively destroyed distinct pool-riffle biocies and reduced the number of acceptable spawning areas. Lost Creek, also, receives effluent from residential dwellings, a secondary treatment sewage plant, …

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Notes On The Habitat And Distribution Of The Odonata Of Franklin County, Arkansas, Jim Houston Jan 1970

Notes On The Habitat And Distribution Of The Odonata Of Franklin County, Arkansas, Jim Houston

Journal of the Arkansas Academy of Science

No abstract provided.

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Butterflies Of Arkansas Family Nymphalidae, E. Phil Rouse Jan 1970

Butterflies Of Arkansas Family Nymphalidae, E. Phil Rouse

Journal of the Arkansas Academy of Science

No abstract provided.

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Additions To The Arkansas Flora, Edwin B. Smith Jan 1970

Additions To The Arkansas Flora, Edwin B. Smith

Journal of the Arkansas Academy of Science

No abstract provided.

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Observation Of Flowering In Arundinaria Gigantea (Walt.) Chapm. In Arkansas, Daniel L. Marsh Jan 1970

Observation Of Flowering In Arundinaria Gigantea (Walt.) Chapm. In Arkansas, Daniel L. Marsh

Journal of the Arkansas Academy of Science

No abstract provided.

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Freshwater Algae Of Arkansas Ii. New Additions, Richard L. Meyer, James H. Wheeler, J. R. Brewer Jan 1970

Freshwater Algae Of Arkansas Ii. New Additions, Richard L. Meyer, James H. Wheeler, J. R. Brewer

Journal of the Arkansas Academy of Science

No abstract provided.

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Floristic Elements Of The Pope County, Arkansas, Area, Gary E. Tucker, Bill Grabill Jan 1970

Floristic Elements Of The Pope County, Arkansas, Area, Gary E. Tucker, Bill Grabill

Journal of the Arkansas Academy of Science

No abstract provided.

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Glyptostrobus Europaeus (Brongn.) Heer In Arkansas, Eugene B. Wittlake Jan 1970

Glyptostrobus Europaeus (Brongn.) Heer In Arkansas, Eugene B. Wittlake

Journal of the Arkansas Academy of Science

Glyptostrobus europaeus (Brongn.) Heer, a fossil gymnosperm is found at a few locations in central North America, in deposits of the Eocene. This work cites previously reported localities and reports a new site at Hooker, Arkansas. This deposit appears to be the most abundant for specimens of G. europaeus in the Eocene of North America. History of the Hooker site, characteristics of the living species G. pensilis (Abel) Koch and G. europaeus is presented. Worldwide distribution of both species through time, is discussed. Specimens of many parts of the life cycle of G. europaeus are recorded and illustrated.

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Observation On The Impact Of Certain Insecticides On Spider Populations In A Cotton Field, Peggy Rae Dorris Jan 1970

Observation On The Impact Of Certain Insecticides On Spider Populations In A Cotton Field, Peggy Rae Dorris

Journal of the Arkansas Academy of Science

No abstract provided.

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Age And Growth Of The Blue Catfish, Ictalurus Furcatus, In The Arkansas River, D. Leroy Gray Jan 1970

Age And Growth Of The Blue Catfish, Ictalurus Furcatus, In The Arkansas River, D. Leroy Gray

Journal of the Arkansas Academy of Science

No abstract provided.

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Effect Of Domestic Effluent On Two Spring Surveys Of Fishes In Lost Creek, Craighead County, Arkansas, John K. Beadles Jan 1970

Effect Of Domestic Effluent On Two Spring Surveys Of Fishes In Lost Creek, Craighead County, Arkansas, John K. Beadles

Journal of the Arkansas Academy of Science

Lost Creek is representative of deltonic streams of the St. Francis Basin possessing characteristics of being turbid. It has a low flow velocity except during the annual spring rains. Lost Creek meanders approximately 18 km. before receiving effluents and empties into Big Creek approximately 4 km. west of Jonesboro, Arkansas. Five collecting stations were studied in 1966 while six stations were sampled in 1970. Some fishes have been found to tolerate moderate amounts of domestic effluents and it is probable that the two species Lepomis cyanellus and Ictalurus melas, collected within the effluents, were more resistant than the other species …

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Digitaria Adscendens And D. Sanguinalis (Gramineae) In Arkansas, Albert Robinson Jr. Jan 1969

Digitaria Adscendens And D. Sanguinalis (Gramineae) In Arkansas, Albert Robinson Jr.

Journal of the Arkansas Academy of Science

No abstract provided.

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Survey Of The Helminth Parasites Of Selected Game Fishes Of Lake Fort Smith, Arkansas, David A. Becker, Walter C. Houghton Jan 1969

Survey Of The Helminth Parasites Of Selected Game Fishes Of Lake Fort Smith, Arkansas, David A. Becker, Walter C. Houghton

Journal of the Arkansas Academy of Science

No abstract provided.

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Some Noteworthy Species Of The Arkansas Flora, Gary E. Tucker Jan 1969

Some Noteworthy Species Of The Arkansas Flora, Gary E. Tucker

Journal of the Arkansas Academy of Science

No abstract provided.

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Freshwater Algae Of Arkansas, Richard L. Meyer Jan 1969

Freshwater Algae Of Arkansas, Richard L. Meyer

Journal of the Arkansas Academy of Science

No abstract provided.

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Survey Of The Arkansas Campanulaceae (Including The Lobeliaceae), Edwin B. Smith Jan 1969

Survey Of The Arkansas Campanulaceae (Including The Lobeliaceae), Edwin B. Smith

Journal of the Arkansas Academy of Science

This paper is a summary of the Campanulaceae of Arkansas, based on the material on file in the University of Arkansas herbarium. A key to the species is included, followed by an alphabetical listing by genus and species of the taxa in the Campanulaceae known to occur in the state. After each taxon, the following information is included in this order: blooming period (as indicated on our material), known distribution in general terms (NW-northwest, E-east, G-general, C- central, etc.), habitat, chromosome number (as reported in Darlington & Wylie, 1955; in the Index to Plant Chromosome Numbers, Vol. I.II, and Supplement; …

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Study Of The Herbaceous, Vascular Plants From Selected Sites In Faulkner County, Arkansas, Sara Mills Barnett Jan 1969

Study Of The Herbaceous, Vascular Plants From Selected Sites In Faulkner County, Arkansas, Sara Mills Barnett

Journal of the Arkansas Academy of Science

No abstract provided.

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Dardanelle Reservoir Illinois Bayou Embayment Background Survey, Clarence B. Sinclair Jan 1969

Dardanelle Reservoir Illinois Bayou Embayment Background Survey, Clarence B. Sinclair

Journal of the Arkansas Academy of Science

No abstract provided.

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