University of Wisconsin–Oshkosh

About: University of Wisconsin–Oshkosh is a education organization based out in Oshkosh, Wisconsin, United States. It is known for research contribution in the topics: Population & Politics. The organization has 1308 authors who have published 2934 publications receiving 72860 citations. The organization is also known as: University of Wisconsin Oshkosh & UW-Oshkosh.

Ecological Meltdown in Predator-Free Forest Fragments

Abstract: The manner in which terrestrial ecosystems are regulated is controversial. The "top-down" school holds that predators limit herbivores and thereby prevent them from overexploiting vegetation. "Bottom-up" proponents stress the role of plant chemical defenses in limiting plant depredation by herbivores. A set of predator-free islands created by a hydroelectric impoundment in Venezuela allows a test of these competing world views. Limited area restricts the fauna of small (0.25 to 0.9 hectare) islands to predators of invertebrates (birds, lizards, anurans, and spiders), seed predators (rodents), and herbivores (howler monkeys, iguanas, and leaf-cutter ants). Predators of vertebrates are absent, and densities of rodents, howler monkeys, iguanas, and leaf-cutter ants are 10 to 100 times greater than on the nearby mainland, suggesting that predators normally limit their populations. The densities of seedlings and saplings of canopy trees are severely reduced on herbivore-affected islands, providing evidence of a trophic cascade unleashed in the absence of top-down regulation.

Researching the Community of Inquiry Framework: Review, Issues, and Future Directions

Abstract: Since its publication in The Internet and Higher Education, Garrison, Anderson, and Archer's [Garrison, D. R., Anderson, T., & Archer, W.(2000). Critical inquiry in atext-based environment: Computer conferencing in highereducation.TheInternet andHigher Education, 2(2–3), 87–105.] community of inquiry (CoI) framework has generated substantial interest among online learning researchers.Thisliteraturereviewexaminesrecentresearchpertainingtotheoverallframeworkaswellastospecificstudiesonsocial, teaching,andcognitivepresence.Wethenusethefindingsfromthisliteraturetoidentifypotentialfuturedirectionsforresearch.Some oftheseresearchdirectionsincludetheneedformorequantitatively-oriented studies,theneedformorecross-disciplinarystudies,and theopportunitiesforidentifyingfactorsthatmoderateand/orextendtherelationshipbetween theframework'scomponentsandonline course outcomes. © 2007 Elsevier Inc. All rights reserved.

Developing a community of inquiry instrument : Testing a measure of the Community of Inquiry framework using a multi-institutional sample

Abstract: This article reports on the multi-institutional development and validation of an instrument that attempts to operationalize Garrison, Anderson and Archer's Community of Inquiry (Col) framework (2000). The results of the study suggest that the instrument is a valid, reliable, and efficient measure of the dimensions of social presence and cognitive presence, thereby providing additional support for the validity of the Col as a framework for constructing effective online learning environments. While factor analysis supported the idea of teaching presence as a construct, it also suggested that the construct consisted of two factors-one related to course design and organization and the other related to instructor behavior during the course. The article concludes with a discussion of potential implications of further refinement of the Col measures for researchers, designers, administrators, and instructors.

Large Perturbations of the Carbon Cycle During Recovery from the End-Permian Extinction

Abstract: High-resolution carbon isotope measurements of multiple stratigraphic sections in south China demonstrate that the pronounced carbon isotopic excursion at the Permian-Triassic boundary was not an isolated event but the first in a series of large fluctuations that continued throughout the Early Triassic before ending abruptly early in the Middle Triassic. The unusual behavior of the carbon cycle coincides with the delayed recovery from end-Permian extinction recorded by fossils, suggesting a direct relationship between Earth system function and biological rediversification in the aftermath of Earth's most devastating mass extinction.