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Tetrodotoxin- toxicity of red efts (Notophthalmus viridescens) based on predatory selection

Thu, 04/30/2015 - 09:33
Abstract: Predators and prey have been coevolving for millions of years; those that have more aggressive relationships undergo more extreme selection as they become paired in an evolutionary arms race. This selection must affect both organisms to truly be an arms race; a relationship that accurately fits these criteria is that of the Eastern Red-Spotted Newt (red-efts) (Notophthalmus viridescens) and the Eastern Hognose Snake (Heterodon platirhinos). Samples of tetrodotoxin (TTX) extracted from red-efts were used to analyze a potential relationship between the efts and resistant predatory species. The values acquired upon analysis of samples were recorded from a population of organisms in an area vacant of the hognose and can be compared to areas where both species reside. Samples came from eighteen red-efts in a wetland located in the southeastern portion of the Adirondack Park where there are no known populations of the hognose snake. These samples were processed using various ELSIA grade chemicals, a procedure that concluded with ELSIA assays applicable for comparison to a set standard. By performing this study we hope to attain data pertaining to tetrodotoxin levels in red-efts that reflect an environment which does not contain hognose snakes, presented in the form of low levels of the specified toxin.
Access: No
Literary Rights: Off
Major: Integrative Studies
Year: 2015
File Attachments: The Author has selected not to publish this complete work.
Authors: Sarah Desrosier

Acidic Deposition in Adirondack Lakes: Episodic Acidification and Equilibrium

Tue, 05/05/2015 - 10:06
Abstract: Acid deposition has been a historic problem in the Adirondacks. Though after original mitigation attempts were deemed successful, funding for many acid deposition-monitoring programs in the area has been cut or eliminated, and much of the data that has been collected is now old and outdated. Newer data on this issue needed to be collected to determine if there truly has been recovery of Adirondack lakes. Through this observational experiment the pH levels of 18 different lakes scattered around the Adirondacks during winter were examined. The pH levels of the snow around the lakes were examined to determine the levels of acid shock. This data was compared to the historic data available and created a preliminary finding. This comparison helped determine that Adirondack water bodies could possibly be coming to a form of equilibrium as the pH levels are possibly returning to a resemblance of pre-disturbance conditions, which suggests recent legislation may have had measurable successes in the goal of reducing the acidification of Adirondack freshwater ecosystems.
Access: No
Literary Rights: Off
Major: Integrative Studies, Natural Resources Management and Policy
Year: 2015
File Attachments: The Author has selected not to publish this complete work.
Authors: Timothy Johnston, Andrew Olcott