Open Access. Powered by Scholars. Published by Universities.®

Life Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 6 of 6

Full-Text Articles in Life Sciences

A Determination Of Phylogeny And Hybridization History Within Clematis L. (Ranunculaceae) Using Actin And Nitrate Reductase Intron Sequences, Kimberly Fearn Do Apr 2006

A Determination Of Phylogeny And Hybridization History Within Clematis L. (Ranunculaceae) Using Actin And Nitrate Reductase Intron Sequences, Kimberly Fearn Do

Graduate Theses and Dissertations

The phylogeny of Clematis, section Viorna, was characterized in this study using molecular data. Two nuclear introns were sequenced for a variety of taxa: actin and nitrate reductase. Actin intron sequence data yielded very little phylogenetic information. Some basal clades were resolved, but there were very few well supported relationships between species of the Viorna section in both the neighbor joining and maximum parsimony analyses. Nitrate reductase intron sequence data was slightly more variable. The number of well supported relationships in both the neighbor joining and maximum parsimony analyses for nitrate reductase was greater, but still not sufficient to yield ...


An Evaluation Of The Along Track Reef Imaging System (Atris) For Efficient Reef Monitoring And Rapid Groundtruthing Of Eaarl Lidar, Nicole O. Caesar Apr 2006

An Evaluation Of The Along Track Reef Imaging System (Atris) For Efficient Reef Monitoring And Rapid Groundtruthing Of Eaarl Lidar, Nicole O. Caesar

Graduate Theses and Dissertations

The Along-Track Reef-Imaging System (ATRIS) is a vessel-mounted, digital camera, depth sounder and Global Positioning System (GPS) package that facilitates the rapid capture of underwater images in shallow-water benthic environments. This technology has the potential to collect ecologically significant data, particularly in benthic habitats less than 10 m in depth, with better location referencing and in less time than is required for surveys carried out by Scuba divers. In October 2004, ATRIS was tested coincidently with SCUBA-assisted video along transects on five patch reefs in Biscayne National Park. Images from both data sets were subsampled, viewed, and benthic cover under ...


Assessment Of Image Analysis As A Measure Of Scleractinian Coral Growth, Steven K. Gustafson Mar 2006

Assessment Of Image Analysis As A Measure Of Scleractinian Coral Growth, Steven K. Gustafson

Graduate Theses and Dissertations

Image analysis was used to measure basal areas of selected colonies of Montastraea annularis and Porites astreoides, following the colonies over a three-year period from 2002 to 2004. Existing digital images of permanently-marked quadrats in the Caye Caulker Marine Reserve, Belize, were selected based on image quality and availability of images of selected quadrats for all three years. Annual growth rates were calculated from the basal-area measurements. Mean growth rates (radial skeletal extension) for M. annularis and P. astreoides were 0.02 cm yr-1 and -0.20 cm yr-1, respectively. Basal area measurements demonstrated a large degree of variability. Increases ...


Prairie Suite: A Celebration, Twyla Hansen, Paul A. Johnsgard Jan 2006

Prairie Suite: A Celebration, Twyla Hansen, Paul A. Johnsgard

Paul Johnsgard Collection

25 poems by Twyla Hansen, with illustrations by Paul A. Johnsgard, including:

Walk on the Prairie

There is mystery here, in the shapes of grass,
in the dim movements of an inland sea,
connections to an earlier time. Wander barefoot,
hypothesize the dance of millennia, the unbearable
carvings of the built environment, this ragtag escape.

Let its divine simplicity ooze into your pores.
Comb the steel from your hair, blanket your
tongue with orange. Your breathing will slow.
Breathing slow, unbutton the child within.
Give her permission to go fly a kite.


The Southern Family Farm As Endangered Species: Possibilities For Survival In Barbara Kingsolver's Prodigal Summer, Suzanne W. Jones Jan 2006

The Southern Family Farm As Endangered Species: Possibilities For Survival In Barbara Kingsolver's Prodigal Summer, Suzanne W. Jones

English Faculty Publications

At the same time some southern studies scholars are positioning the U.S. South in a larger cultural, historic, and economic region that encompasses the Caribbean and Latin America, some southern environmentalist writers, such as long-time essayist and novelist Wendell Berry and activist-turned-memoirist Janisse Ray, are finding a pressing need to focus on smaller bioregions and the locatedness of the human subject. These writers believe that agribusiness and consumer ignorance are driving small farmers out of business and that clear-cutting timber and farming practices dependent on chemicals are threatening local ecosystems. Best-selling novelist Barbara Kingsolver has joined their ranks. With ...


The Impact Of The Secondary Agricultural Education Program On Latino Students: Perspectives Towards The Agricultural Education Class, The Local Ffa Organization And The Supervised Agricultural Experiences Program In Iowa Public Schools , Aurelio Curbelo Jan 2006

The Impact Of The Secondary Agricultural Education Program On Latino Students: Perspectives Towards The Agricultural Education Class, The Local Ffa Organization And The Supervised Agricultural Experiences Program In Iowa Public Schools , Aurelio Curbelo

Retrospective Theses and Dissertations

Due to the increasing population of Latino students in the Iowa secondary agricultural education program and the need for minority leaders in agriculture, the goal of this study was to survey a group of students in agricultural classes to understand their perspectives towards the learning components of the program. This study found that Latino students in Iowa secondary schools were supportive of the agricultural education program and interested in participating in experiential programs. Recommendations from this study are to encourage Latino students to actively participate in secondary agricultural classes. A greater effort from educators to recruit and research minority students ...