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Ecology

Arts & Sciences Faculty Publications

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Full-Text Articles in Life Sciences

Crassulacean Acid Metabolism As A Continuous Trait: Variability In The Contribution Of Crassulacean Acid Metabolism (Cam) In Populations Of Portulacaria Afra, Lonnie J. Guralnick, Kate Gladsky Jan 2017

Crassulacean Acid Metabolism As A Continuous Trait: Variability In The Contribution Of Crassulacean Acid Metabolism (Cam) In Populations Of Portulacaria Afra, Lonnie J. Guralnick, Kate Gladsky

Arts & Sciences Faculty Publications

Portulacaria afra L. is a dominant facultative CAM species growing in the Southeastern Cape of South Africa. P. afra is well adapted to regions of the Spekboom thicket in areas of limited and sporadic rainfall. P. afra populations occur in isolated drainages. We hypothesized the utilization of CAM would vary in the different populations in response to rainfall and temperature gradients. Carbon isotope composition can be used to determine the contribution of CAM in leaf tissue. P. afra leaves of populations were analyzed in transects running south to north and east to west in locations from the coast to elevations ...


Quantitatively Measuring In Situ Flows Using A Self-Contained Underwater Velocimetry Apparatus (Scuva), Kakani Katija, Sean Colin, John H. Costello, John O. Dabiri Jan 2011

Quantitatively Measuring In Situ Flows Using A Self-Contained Underwater Velocimetry Apparatus (Scuva), Kakani Katija, Sean Colin, John H. Costello, John O. Dabiri

Arts & Sciences Faculty Publications

The ability to directly measure velocity fields in a fluid environment is necessary to provide empirical data for studies in fields as diverse as oceanography, ecology, biology, and fluid mechanics. Field measurements introduce practical challenges such as environmental conditions, animal availability, and the need for field-compatible measurement techniques. To avoid these challenges, scientists typically use controlled laboratory environments to study animal-fluid interactions. However, it is reasonable to question whether one can extrapolate natural behavior (i.e., that which occurs in the field) from laboratory measurements. Therefore, in situ quantitative flow measurements are needed to accurately describe animal swimming in their ...


Nutritional Properties Of The Invasive Lionfish: A Delicious And Nutritious Approach For Controlling The Invasion, James A. Morris, Jr., Amber Thomas, Andrew L. Rhyne, Nancy Breen, Lad Akins, Barry Nash Jan 2011

Nutritional Properties Of The Invasive Lionfish: A Delicious And Nutritious Approach For Controlling The Invasion, James A. Morris, Jr., Amber Thomas, Andrew L. Rhyne, Nancy Breen, Lad Akins, Barry Nash

Arts & Sciences Faculty Publications

Lionfish, Pterois volitans and P. miles, are native to the Indo-Pacific and have recently invaded the Western Atlantic Ocean. Strategies for control of this invasion have included limited removal programs and promotion of lionfish consumption at both local and commercial scales. We demonstrate that lionfish meat contains higher levels of healthy n-3 fatty acids than some frequently consumed native marine fish species. Mean lionfish fillet yield was 30.5% of the total body wet weight, a value that is similar to that of some grouper and porgy species. A sensory evaluation indicated that lionfish meet the acceptability threshold of most ...


Scale Model Of A Soil Aggregate And Associated Organisms: A Teaching Tool For Soil Ecology, Mary Anne Bruns, Loren B. Byrne Jan 2004

Scale Model Of A Soil Aggregate And Associated Organisms: A Teaching Tool For Soil Ecology, Mary Anne Bruns, Loren B. Byrne

Arts & Sciences Faculty Publications

Soil is a complex habitat for diverse biota. A significant challenge in teaching soil ecology is our inability to observe organisms as they live and interact in the soil. The objective of this article is to describe an interactive class project to help students visualize the sizes of different groups of soil organisms and to relate these to soil structural components. This project was carried out by students in an upper-level undergraduate soil ecology class. It involved the design and construction of a 4000× scale model of a soil aggregate and its associated organisms. The body of the model was ...


Fluorescence Quenching In The Varied Photosynthetic Modes Of Portulacaria Afra (L.) Jacq, Lonnie J. Guralnick, Guillermo Goldstein, Robert L. Heath, Irwin P. Ting Jan 1992

Fluorescence Quenching In The Varied Photosynthetic Modes Of Portulacaria Afra (L.) Jacq, Lonnie J. Guralnick, Guillermo Goldstein, Robert L. Heath, Irwin P. Ting

Arts & Sciences Faculty Publications

No abstract provided.