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Full-Text Articles in Life Sciences
A New Model Species For Cultured Teleost Retinal Cell Studies: Light And Scanning Electron Microscopy, Lori Ann Steinfeldt
A New Model Species For Cultured Teleost Retinal Cell Studies: Light And Scanning Electron Microscopy, Lori Ann Steinfeldt
Undergraduate Honors Capstone Projects
Purpose: To examine retinal horizontal and bipolar cells cultured from goldfish (Carassius auratus), black crappie (Pomoxis nigromaculatus) and bluegill (Lepomis macrochirus) on the light and electron microscope levels; and to compare them with cells from a more established model, the wild white bass (Roccus chrysops). Methods: Retinas from all species were dissociated by methods developed with wild white bass (Dowling et al., 1985). Cell type was identified within the first 3 hr and cells were cultured for up to 2 wk in L-15 medium. At various intervals, cells were fixed in glutaraldehyde, …
Discussion And Measurement Of Soil Erosion In Iceland, Kimberly Jane Richardson
Discussion And Measurement Of Soil Erosion In Iceland, Kimberly Jane Richardson
Undergraduate Honors Capstone Projects
Soil erosion has occurred since the beginning of time. It is a natural process, but one that has been increasing at an alarming rate. Once soil is eroded--whether it is blown out to sea or washed down a river to sedimentize a lake--it is lost. It is almost impossible to reestablish similar soil components and characteristics in a given system. Since soil and vegetation reestablishment is expensive, the prevention of soil erosion by controlling its causes has become the most cost-effective reclamation effort.
After spending six months in Iceland, I wrote this paper on the unique erosion problems facing that …
Does Competition Drive Community Structure? An Analysis Of Grasshopper Competition, H. Joseph Lachowski
Does Competition Drive Community Structure? An Analysis Of Grasshopper Competition, H. Joseph Lachowski
Undergraduate Honors Capstone Projects
lnterspecific competition has been broadly defined as a negative-negative relationship between species that share a limiting resource. The impact of competition on ecological communities is a widely debated topic (Schoener 1982). Thus community structure is very complex and, in addition to competition, can be influenced by many factors, including climate, disease, parasites, and predation (Hairston et al. 1960; Stower & Greathead 1969; Wiens 1977). The importance of competition depends upon the importance of other processes (Welden & Slauson 1986).