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Forest Research In Iowa's State Parks - The Values Of Natural Diversity, Donald R. Farrar

Journal of the Iowa Academy of Science: JIAS

Approximately 3% of Iowa's forests are contained in state parks and preserves. In addition to aesthetics and recreation, these protected forests provide a vital service in the unique opportunities they provide for forest research. As intact ecosystems where natural ecological processes dominate, they provide standards by which we measure the effects of livestock pasturing, methods of timber harvest, and other manipulations of managed forests. A number of current studies and public programs emphasize the importance of natural diversity in forests. They rely on state parks and preserves to provide a measure of potential diversity for a given region of the …

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Index For Volume 104

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Iowa Academy Of Science 109th Annual Meeting [1997]: Advance Program, Iowa Academy Of Science

Iowa Academy of Science Documents

Contains information about the schedule and presentations for the 1997 annual meeting of the Iowa Academy of Science.

Iowa Academy Of Science Membership Directory, 1997-98, Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Editorial Board, Journal ... 5
Committees ... 6
Sections ... 18
ISTS Regional Directors ... 22
Awards of Merit ... 24
Excellence in Science Teaching Awards ... 25
Past Presidents ... 26
Membership Roster ... 27

Fungal Colonization Of Alfalfa Stubble Following Harvest, J. K. O'Mara, G. P. Munkvold

Journal of the Iowa Academy of Science: JIAS

Two-year-old stands of alfalfa cultivars Saranac and Vernal, planted in Central Iowa, were sampled 0, 15, and 30 days after the first harvest in 1995 to identify fungi colonizing the stubble left after harvest and evaluate the role of harvest-induced wounds as infection sites for potential crown-rotting fungi. Analysis of variance was conducted to determine if sampling date and cultivar significantly affected incidence of the fungi. All stems were infected with at least one fungal species at every sampling dare. The fungal genera most frequently isolated were Alternaria, Colletotrichum, Fusarium, Phoma, and Rhizoctonia. Fusarium acuminatum was the most frequently isolated …

Distribution And Abundance Of Prairie Plant Species In The Loess Hills, Thomas R. Rosburg

Journal of the Iowa Academy of Science: JIAS

The species composition of grassland and ecotonal communities throughout the Loess Hills was studies between 1990 and 1993. Information pertaining to the latitudinal distribution of species in the Loess Hills, the abundance of species among community types (i.e., habitats), species persistence under woody encroachment, species associations, and resource partitioning among species is provided for the majority of grassland species occurring in the Loess Hills. The most abundant species on extant prairie in the Loess Hills include Bouteloua curtipendula (side-oats grama), Schizachyrium scoparium (little bluestem), Andropogon gerardii (big bluestem), Cornus drummondii (rough-leaved dogwood), Aster ericoides (heath aster), Carex heliophila (sun-loving sedge), …

Book Review - Okoboji Wetlands. A Lesson In Natural History, Robert W. Black

Journal of the Iowa Academy of Science: JIAS

Michael Lannoo's reverent, musing history of the Okoboji region, and especially its wetlands and the Iowa Lakeside Laboratory, is a uniquely structured, well-written and wonderfully illustrated introduction to a distinct region in Iowa, a rich natural history of wetland organisms and a relatively unexplored branch of environmental ethics. Lannoo draws upon many years of experience in this region, as a student, researcher and teacher, and the wonderful resources of the Iowa Lakeside Laboratory and the Iowa Great Lakes Maritime Museum to produce a volume that educates the reader of the history and natural history of the Okoboji region and provokes …

Research Note: Records Of Thirteen Ground Beetles (Coleoptera: Carabidae) New To Iowa, Foster Forbes Purrington, Kirk Jon Larsen

Journal of the Iowa Academy of Science: JIAS

A long-term ecological research initiative in northeast Iowa tallgrass prairies to evaluate the effects of prescribed burning on prairie insects was begun in 1993. During the course of this work we discovered 13 ground beetle species (Coleoptera: Carabidae) (Table 1) not previously reported from Iowa (Bousquet and Larochelle 1993).

Photo, Dr. Richard W. Pohl, February 1982 & Foreward To V.104 No.3, Lynn G. Clark

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Richard W. Pohl: Distinguished Botanist, Marjorie Conley Pohl

Journal of the Iowa Academy of Science: JIAS

In her biographical portrait of Dr. Richard W. Pohl, Mrs. Pohl provides an engaging personal perspective of her late husband, his development as a botanist, his career, and his family life. We gain a sense of Dr. Pohl as a dedicated scientist as well as a humanist. Although Dr. Pohl possessed an abiding curiosity regarding all things natural, he is best known and remembered for his focus on grasses. As Mrs. Pohl documents, this interest in grasses began in the late 1930's and continued throughout his life-ultimately he was regarded as an authority on grass taxonomy both nationally and internationally. …

Carnivorous Spadefoot (Spea Bombifrons Cope) Tadpoles And Fairy Shrimp In Western Iowa, Eugenia S. Farrar, Jane D. Hey

Journal of the Iowa Academy of Science: JIAS

Amphibian larval polymorphisms, rarely found in the Midwest, are more common in arid western regions. We have discovered that Plains spadefoot toad, Spea bombifrons Cope, tadpoles occur as carnivorous and omnivorous morphological forms in flooded soybean and corn fields on the Missouri River flood plain of western Iowa. Carnivores have longer snouts, larger beaks with an upper cusp and lower notch, shorter intestines with fewer loops than the omnivores, and they feed on fairy shrimp. A similar polymorphism in Spea multiplicata Cope enhances survival in the desert because the carnivore develops faster after consuming fairy shrimp and is able to …

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.

Iowa's State Parks: A Various Language, Rebecca Conard

Journal of the Iowa Academy of Science: JIAS

Iowa's state park system is distinctive because academically based natural scientists were instrumental in drafting the 1917 State Park Law, in shaping the initial policies, and in establishing the first parks. The mandate of the 1917 law was broad, but its original intent was to preserve and conserve natural resources; providing recreational enjoyment was secondary. Between 1920 and mid-century the founding vision was recast time and again by compromises that sprang from economic necessity, competing interests, and changing societal values. The ideal of resource protection has remained a guiding principle, however, in large part because strong personalities provided continuity of …

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Additions To The Pteridophyte Flora Of Iowa-Iv, James H. Peck, Jeffrey C. Nekola, William Thomas

Journal of the Iowa Academy of Science: JIAS

This report updates field collection records and summarizes nomenclatural changes of genera and binomials of species of Iowa pteridophytes based on the Flora of North America project. Botrychium simplex var. compositum, Gymnocarpium jessoense (Koidz.) Koidz. spp. parvulum Sarvela, Gymnocarpium Xhrittonianum (Sarvela) Pryer & Haufler, and Gymnocarpium Xintermedium Sarvela were recently added to the state flora. The flora now consists of 66 species, plus 7 hybrids, and 1 distinct form, for a total of 74 taxa. With the addition of 81 new county occurrence records, the Iowa pteridophyte flora now consists of 1754 county occurrence records. A data matrix of species/county …

Midwestern Geology And Cornell College: The First 125 Years, Gene E. Hinman, Paul L. Garvin

Journal of the Iowa Academy of Science: JIAS

The history of geology at Cornell College can be traced back almost to the college's beginnings. Though not the first to reach geology at Cornell, William Harmon Norton, more than any other person, shaped the Department of Geology and set it on its course of excellence. Born in 1856, the son of a Methodist minister, Norton developed an ardent interest in geology in his boyhood. A graduate of Cornell in Classics, Norton was hired by his alma mater in 1876 to reach Greek, bur his avocation was geology. He spent most of his spare time on weekends and during summers …

Book Review - The End Of Science: Facing The Limits Of Knowledge, David Lopatto

Journal of the Iowa Academy of Science: JIAS

The June, 1997 issue of Harper's Magazine included a list of recently published books that have titles beginning with "The End of". There are thirty-one titles on the list. Publishers have been rushing to cash in on the public's emotional reaction to the coming end of the century. It is difficult to take some of these works seriously. Perhaps the hardest thesis to swallow is that science, including physics, chemistry, biology, and neuroscience, not to mention the social sciences and the philosophy of science, is coming to an end just as our somewhat arbitrary calendar ticks over to a new …

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

A Search For Average, Extremes, And Runs Of Unusual Weather In Iowa, R. E. Carlson, D. P. Todey

Journal of the Iowa Academy of Science: JIAS

Temperature and precipitation during the past decade have exhibited wide variation throughout Iowa. Is this unusual? An attempt was made to answer this question by computing various statistical parameters that characterize variation in Iowa's long term climatic record. Absolute deviations were used to identify the most and least variable months and years since 1900. Overall, 1936 with a very cold winter and very warm summer was the least normal year. Runs of daily weather showed that heat and cold stress could often persist for more than 1 month. Runs of dry days were much longer than runs of wet days. …

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Walking Thoughts, Hunter R. Rawlings Iii

Journal of the Iowa Academy of Science: JIAS

I've borrowed my title from a poem by Marvin Bell, a member of our Writers' Workshop, because I cannot think of state parks without thinking of my love for their hiking trails and the expansion of spirit they have brought me. State parks are more than nature preserves, more than recreational areas, though these functions are very important. They are also cultural and even spiritual resources, centers of emotional and psychic renewal.