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A Preliminary Catalog Of The Lichen-Forming Fungi Of Nebraska, Robert S. Egan, Richard C. Witt, Yolanda E. Peck, John P. Goeden, Teresa L. Cherney

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

A total of 438 lichen-forming taxa have been reported in the literature from Nebraska. Based on current taxonomic concepts and synonymy we recognized 312 lichen species in this catalog for the state. Published reports of lichen species citing specific collection localities are listed from only 31 counties. These records are concentrated in eastern Nebraska with the largest numbers of species listed from localities in Cass, Lancaster, Saunders, Richardson, and Sarpy counties

A Survey And Analysis Of The Unionid Mollusks Of The Platte Rivers Of Nebraska And Their Minor Tributaries, Ellet Hoke

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

A survey conducted in the Platte basins in Nebraska between 1972 and 1995 documented a bivalve fauna consisting of sixteen native unionids and one introduced exotic species. Five new taxa were confirmed for the Platte basins in Nebraska, increasing the total reported for the region to eighteen unionids and one exotic taxon. The greatest species diversity was found to have existed in tributaries of the Platte rivers, while bivalves were uncommon in the main channel of the Platte River. Man-made environments provide significant habitat for some bivalves in the region.

A Survey Of Mussels (Mollusca: Bivalvia) In The Platte River System And Associated Irrigation And Hydropower Canal And Lake Systems West Of Overton, Nebraska, Mark M. Peyton, Jeremiah L. Maher

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

More than 8,000 specimens of freshwater mussels, representing ten species, were identified from the Platte River, seven irrigation canals and ten canal lakes west of Overton, Nebraska. Only 18 of these identified specimens, representing five species, were collected from the Platte River, indicating the canal and lake systems associated with the Platte River provide more habitat for freshwater mussels than the river. Population estimates for five canals and three lakes are given. A review of previous mussel surveys as well as species lists and hypotheses regarding habitat preferences are discussed.

A Project-Motivated Approach To An Electronics Curriculum, T. S. Mcshane, M. G. Cherney, R. E. Kennedy, J. E. Seger

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Based on the observation of our students learning electronics in the course of their independent research experiences, the introductory electronics program at Creighton University has been revised to provide a similar contextual setting. From the beginning of the course, the students are involved with the type of instrumentation they will encounter in upper-division laboratories, in research laboratories, and in industrial settings. Two sets of equipment are utilized. The first set is used for learning the basic fundamentals and building blocks of electronic devices. The second set is used for student projects. Experience in a goal-oriented project environment enables students both …

Keys And Distributional Maps For Nebraska Cyperaceae, Part 1: Bulbostylis, Cyperus, Dulichium, Eleocharis, Eriophorum, Fimbristylis, Fuirena, Lipocarpha, And Scirpus, Steven B. Rolfsmeier

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Keys and distributional maps are provided for nine genera and 43 species of Cyperaceae documented from Nebraska (excluding Carex). Two species--Eleocharis elliptica and Fimbristylis vahlii--are newly reported for the state, while seven species attributed to the state in the Flora of the Great Plains (Great Plains Flora Association, 1986)--Eleocharis compressa, E. verrucosa, E. wolfii, E. xyridiformis, Scirpus georgianus, S. smithii, and S. torreyi--are deleted based on re-identifications, lack of specimen evidence, or specimens of doubtful provenance in the state. Notes on local systematic problems within the family are also included.

Growth Rate As A Function Of Food Consumption In Hatchling Sceloporus Virgatus (Sauria: Iguanidae), Geoffrey R. Smith

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

The potential for food availability and consumption to produce variation in growth rates among hatchling striped plateau lizards (Sceloporus virgatus) was studied under laboratory conditions. Growth rate and survivorship were positively linearly related to the amount of food consumed. Differences in food consumption and availability created large differences in body size by the end of the experiment.

Ecology Of Growth Of The High Altitude Lizard Sceloporus Grammicus On The Eastern Slope Of Iztaccihuatl Volcano, Puebla, México, Julio A. Lemos-Espinal, Royce E. Ballinger

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Growth in the lizard Sceloporus grammicus living at two altitudes on the Iztaccihuatl Volcano, Puebla, Mexico, was studied from November 1984 to January 1992. Despite differences in the environmental conditions at these two elevations, individual lizards grew at similar rates at both study sites. Females in both populations grew slower and attained asymptotic size earlier in life than males (0.0025 mm per day and 49.7 mm snout-vent length for females vs. 0.0027 mm per day and 53.2 mm snout-vent length for males). Maximum growth rates were observed early in life in both sexes and sites. Growth in Sceloporus grammicus fits …

Velocity Microhabitats In The Edges Of The Channelized Missouri River, Larry W. Hesse

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Mean column velocity in the filling bank of the channelized Missouri River reached a maximum of 0.875 m/s. In these locations nose velocity was 30% less. Increased volume discharge did not result in increased velocity in the filling bank locations studied. Surface velocity did not exceed 0.5 m/s within the first 3 m from the cutting bank at two locations along the channelized Missouri River near Nebraska City and Tekamah, Nebraska. Within column velocity at the Nebraska City site was typically higher than velocity near the surface and nearer the bottom. However, at the Tekamah site surface velocity was frequently …

Rodents From The Late Hemphillian (Latest Miocene), Sioux County, Nebraska, William W. Korth

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Only one rodent specimen has been previously described from the late Hemphillian ZX Bar local fauna from Sioux County, Nebraska-the holotype of the heteromyid Perognathus coquorum Wood. A re-examination ofthis specimen has led to its allocation to the dipodomyine heteromyid genus Prodipodomys Hibbard. An additional specimen of a fossil rodent has been recognized from the ZX Bar fauna that is referable to a new species of the primitive geomyid Pliogeomys, P. russelli.

Transactions Of The Nebraska Academy Of Sciences Table Of Contents: Volume 22 (1995)

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Editorial Contents

Nebraska Academy of Sciences Officers, Policy Committee .............. iv

Editorial Board .............. vi

Membership Objectives and Friends of the Academy .............. vii

Nebraska Association of Teachers of Science .............. viii

Preparation of manuscripts .............. inside back cover

Papers

Velocity microhabitats in the edges of the channelized Missouri River (Larry W. Hesse) .............. 1

A preliminary catalog of the lichen-forming fungi of Nebraska (Robert S. Egan, Richard C. Witt, Yolanda E. Peck, John P. Goeden, and Teresa L. Cherney) .............. 13

Keys and distributional maps for Nebraska Cyperaceae, Part 1: Bulbostylis, Cyperus, Dulichium, Eleocharis, Eriphorum, Fimbristylis, Fuirena, Lipocarpha, and …