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Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Journal Of The Iowa Academy Of Science Submission Form And Instruction Sheet

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Seasonal Composition Of Benthic Diatom Associations In The Cedar River Basin (Iowa), Stephen P. Main

Journal of the Iowa Academy of Science: JIAS

This is the first detailed report on the taxonomy and ecology of diatoms in the portion of the upper reaches of the Cedar River basin in Iowa. This paper describes the diatom taxa from shallow benthic substrata collected quarterly between 11 October 1975 and 19 February 1977 at 14 sampling stations. Just over 500 frustules were counted from each of the 216 samples obtained. Analysis of water samples collected at the same time as the diatoms indicates these screams have alkaline hard waters rich in nutrients with extreme turbidity level fluctuation at irregular intervals.

The 281 diatom taxa identified represented …

Reevaluating Evidence For The Pre-Lllinoian Entrenchment Of Northeastern Iowa River Valleys, Curtis M. Hudak

Journal of the Iowa Academy of Science: JIAS

Previous workers have proposed a pre-Illinoian age for the deepest bedrock entrenchment of northeastern Iowa valleys. Lines of evidence used to support a pre-Illinoian age of entrenchment are: (1) deep bedrock-entrenchment interpreted to take "long" periods of time, (2) "valleys" filled with "red-weathered drift", which was interpreted as "old", (3) differences in cross-valley profiles supposedly related to glacial advances, (4) thick beds of gravel could only be deposited by outwash streams, and (5) glacially buried (drift-filled) bedrock valleys exist outside of the Paleozoic Plateau to the west and south. These inferences are questionable because: ( 1) erosion (entrenchment) rates are …

The Status Of Three Uncommon Salamanders (Amphibia: Caudata) In Iowa, Jeffery D. Camper

Journal of the Iowa Academy of Science: JIAS

The smallmouth salamander [Ambystoma texanum (Matthes)], blue-spotted salamander (Ambystoma laterale Hallowell), and central newt [Notophthalmus viridescens louisianensis (Wolterstorff)] were studied in Iowa from fall 1982 through summer 1984. All three species have declined in abundance in Iowa. A. texanum is more abundant and widespread than was previously suspected, but is declining due to habitat destruction. Apparently, only two populations of A. laterale remain in Iowa. N. v. louisianensis has also declined due to habitat destruction, with only three populations known. All three species require ponds in or adjacent to forest. A. ta was found primarily in riparian …

Science Learning Matters: Iowa Within The Context Of The Naep Assessments, Jack A. Gerlovich

Iowa Science Teachers Journal

The National Assessment of Educational Progress (NAEP) report (Mullis and Jenkins, 1988) states that "science exerts a pervasive influence on the quality of the lives of all citizens, and that it is essential that all productive citizens be able to understand and resolve the increasing number of societal problems related to science and technology." Our national position as a world leader is dependent upon such knowledge and skills. In Iowa, a state striving to improve its national and world economic status, these NAEP analyses are critical.

Science Notes - "Thinking Globally, Acting Locally" Workshop Of Environmental Issues

Iowa Science Teachers Journal

The Iowa Conservation Education Council, Warren County Conservation Board, Des Moines County Conservation Board and Department of Natural Resources are working in cooperation to sponsor "Thinking Globally, Acting Locally," a workshop focusing on current environmental issues.

Science Notes - Project Liftoff Offers Experience In Cascade Range Volcanoes, Stephanie A. Althof

Iowa Science Teachers Journal

Portland State University, with assistance from the National Science Foundation, is again sponsoring a Project Liftoff Workshop in Oregon.

Science Notes - University Of Northern Iowa Science Updates Planned, Stephanie A. Althof

Iowa Science Teachers Journal

The University of Northern Iowa will host four Science Updates this spring. Educators in the fields of physics, science education, chemistry and earth science will have an opportunity to meet with others from their fields and explore new ideas, activities and materials.

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

An Interpretative History Of The Proceedings Of The Iowa Academy Of Science, Don C. Norton

Journal of the Iowa Academy of Science: JIAS

The Proceedings of the Iowa Academy of Science was first published in 1887 and has continued yearly except for 1905. Business reports and contributed papers constituted most of the volumes. Publication of symposia has become more popular in recent years. Financial and mechanical problems have caused strains at rimes, but these have largely been solved after publication became independent of the State Printer.

Predation By Ermine And Long-Tailed Weasels On Duck Eggs, Joseph P. Fleskes

Journal of the Iowa Academy of Science: JIAS

Ermine (Mustela erminea) and long-tailed weasel (M. frenata) predation on duck eggs was studied at Union Slough National Wildlife Refuge, Kossuth County, Iowa, 1984-85. Captive individuals of both species ate 2-4 duck eggs at a rate of 0.5-2 eggs per trial day. All eggs were moved but some were not opened. One hole, ringed with small fragments and "bite-outs'', was made in all eggs opened by captive weasels. In the field, the appearance of opened eggs, the pattern of egg loss and the amount of nest bowl disturbance were used to determine the number of nests depreciated by weasels. Egg …

Biotechnology: Impact On Iowa's Agricultural Economy, Dwight T. Thomas

Journal of the Iowa Academy of Science: JIAS

Agriculture has always been an important cornerstone of Iowa's economy. The highly publicized difficulties in the agricultural economy in Iowa have highlighted both the importance of agriculture and pitfalls when agriculture is hit by adverse conditions. Iowa's agriculture and agricultural infrastructure have a heritage characterized by the development of very efficient production technology and the early use of innovative ideas. The early adoption of hybrid corn is but one example of the acceptance new technology. Today more than ever before there is a need for improved profitability and for the possibility of diversification of agricultural products in Iowa.

The following …

Program Abstracts, 100th Session, Iowa Academy Of Science, April 21-23, 1988, Iowa State University

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Economic Changes From The Use Of Biotechnology In Production Agriculture, Loren W. Tauer

Journal of the Iowa Academy of Science: JIAS

The potential economic impact of biotechnology in production agriculture is discussed. There are challenges and difficulties in completing economic research when little production information is available on biotechnologies. I argue that little impact differences exist between cost-reducing versus output-increasing technological change. Rapid technological change results in low average returns in agriculture but continuous early innovators earn higher returns. Various plant and animal technologies are presented and discussed.

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Dr. James G. Macmillan, Executive Director, Iowa Academy Of Science, 1983-1988

Journal of the Iowa Academy of Science: JIAS

The officers and Board of Directors of the Iowa Academy of Science dedicate this issue of the Journal of the Iowa Academy of Science to Jim Macmillan in recognition of his five years of exemplary leadership. During this period, Jim's managerial expertise has served the Academy well and membership has grown significantly. Under Jim's guidance the Academy has improved its financial base through sound fiscal policies, and important steps have been taken in the area of computerized record keeping and data management.

Benthic Macroinvertebrate Habitat Associations Of The Channelized Middle Missouri River, James B. Barnum, Roger W. Bachmann

Journal of the Iowa Academy of Science: JIAS

Benthic macroinvertebrates associated with navigation structures (dikes, dike pools, revetted banks) and abandoned channels on the Missouri River at the Iowa-Nebraska border were sampled in June, August, and October 1983 to determine the invertebrate community structure of these habitats. Invertebrate densities were greatest in the abandoned channel habitat (to over 13,000/m²), while diversities were greatest in the dike and revetment habitats. Greater habitat diversity contributed to greater organism diversity in the dike and revetment habitats while sediment homogeneity and stability presumably contributed to greater organism densities in the abandoned channel habitat. Dike pools had turbulent eddy currents, which …

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Some Genetic Characteristics Of Three Walleye Stocks In Iowa And The Impact Of Fry Stockings In The Cedar River, Vaughn L. Paragamian

Journal of the Iowa Academy of Science: JIAS

Fry stockings of walleye Stizostedion v. vitreum into the Cedar River, Iowa began in the early 1950's, and two studies of the success of these plants gave conflicting results. The objectives of my study were to identify some genetic characteristics in three stocks of walleye and to utilize these characteristics to assess the genetic impact of fry stockings in the Cedar River. Electrophoretic analysis of malate dehydrogenase (MDH) and isocitrate dehydrogenase (IDH) was completed for walleye stocks from the Mississippi and Cedar Rivers, and Big Spirit Lake, Iowa. Phenotypic frequencies of Mdh - B² and Mdh - B^{3 …}

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Recompact Iowa Soil Materials Before Using As Liners For Waste Containment, G. J. Kluitenberg, R. Horton, M. L. Thompson, J. F. Mcbride

Journal of the Iowa Academy of Science: JIAS

Soil materials are often used in hazardous-waste disposal facilities to provide a physical barrier to leachate movement. Both existing soils and recompacted soil materials have been used in barrier construction. Solute transport experiments and measurements of saturated hydraulic conductivity were used to characterize the solute transport properties of three Iowa soil materials. Experiments were carried out by using undisturbed soil samples as well as recompacted samples. The experimental results show that recompaction greatly altered the solute transport properties of the three soil materials. It is concluded that recompaction is necessary for any of these materials to satisfy Environmental Protection Agency …

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Astronomy News, P. Steven Leiker, Thomas A. Hockey

Iowa Science Teachers Journal

One of the fringe benefits of discovery has usually been the right to name what one has discovered. In the case of the unmanned NASA space probe, Voyager II, which first photographed a number of previously unknown satellites orbiting the planet Uranus during its fly-by of that giant planet in 1985-86, that duty went to a special naming committee of the International Astronomical Union.

Astronomy Bulletin - The 1989 Spring Sky, P. Steven Leiker, Thomas A. Hockey

Iowa Science Teachers Journal

No abstract provided.

The Effectiveness Of Using Writing In The High School Biology Classroom, Lynne E. Kelly

Dissertations and Theses @ UNI

"Writing across the curriculum" programs have emerged throughout the United States during the last decade as an attempt to improve both writing skills and learning of today's youth. The purpose of this study was to determine if students learn and retain concepts of biology to a greater extent in a program using expressive writing than a program using traditional expository writing. The sample consisted of two high school biology classes from Fort Dodge Senior High School, Fort Dodge, Iowa. Expressive writing assignments were incorporated into the biology curriculum of the experimental group two to four times a week during the …

The I.A.S Bulletin, V21n1, June 1987, Iowa Academy Of Science

IAS Bulletin

In this issue:

--- A Note from the Editor
--- Annual Meeting Address by Paul Walte
--- Lenore Durkee Assumes Presidency
--- Iowa Science Foundation Grants Awarded 1987-88
--- Iowa Academy of Science Recognizes Outstanding Science Students
--- 1986-87 Committee Reports
--- Membership Facts