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Capstone Projects

Food Plots for White-tailed Deer: Effects on the Browse Intensity of Commercial Tree Species in Western New York

Mon, 12/05/2011 - 10:09
Abstract: Throughout North America high densities of white-tailed deer (Odocoileus virginianus) are creating problems that affect humans as well as the natural environment; such as property damage (ex. deer/car accidents), crop damage due to browse, changes in forest species composition, as well as the creation of alternate stable states throughout the northeastern forests of the U.S. This study examined whether food plots for white-tailed deer are increasing, decreasing or having no effect on the browse intensity of commercial tree species in the northern hardwood/coniferous forests of western New York. Spring and summer browse intensity was determined at six sites throughout Wyoming, Cattaraugus, and Erie counties; three forested sites with food plots and three forested sites without food plots that were similar in species composition. The study found that food plots were causing an increase in browse intensity on commercial tree species to areas immediately adjacent (0-2 meters) to the food plots. However, further analysis that excluded measurements taken for subplots one at both food plot and non-food plot sites showed that non-food plot sites had a significantly greater proportion browsed. The findings suggest that if food plots are used as a management option for white-tails in western New York a buffer zone of at least 2 meters outside the food plot should be incorporated to account for the overflow of deer browse.
Access: Yes
Literary Rights: On
Major: Natural Resources Management and Policy
Year: 2011
Authors: Mike Domagalski

Changes in aquatic communities resulting from interactions between climate change and invasive aquatic plants in the Adirondacks.

Thu, 02/09/2012 - 11:26
Abstract: Global climate change can act synergistically with invasive species leading to shifts in ecosystem structure and function. We assessed how a rise in water temperature influenced the potential competitive advantage of an invasive aquatic plant, Eurasian watermilfoil, (Myriophyllum spicatum) over a co-occurring native species northern watermilfoil (M. sibiricum). We also examined the interrelationship between water temperature, watermilfoil, and the aquatic ecosystem including periphyton growth and zooplankton abundance. The study was conducted using replicated mesocosms (3785-liter), with water heaters used to provide a range of temperatures. We found that increasing water temperature promoted the likely competitive advantage of the invasive species, M. spicatum: Survival of M. sibiricum plants was lower than that of M. spicatum across all temperature treatments with a mean survival rate of 24% and 96% respectively. M. sibiricum also showed significantly slower rates of plant growth (mean growth of 3.3 cm compared to 7.6 cm for M. spicatum) and reduced vigor compared to M. spicatum, with an average of less than half the number of growing meristems. Zooplankton densities averaged over 20 times higher in mesocosms with M. sibiricum compared to those with the invasive M. spicatum. Periphyton biomass was best explained by water temperature with an increase in growth in warmer water. Our study confirms that in the face of global climate change, the invasive M. spicatum will continue to exert dominance over its native counterpart. Our results also provide compelling evidence that the combined effects of climate change and invasive aquatic plants can dramatically alter aquatic ecosystems.
Access: Yes
Literary Rights: Off
Major: Environmental Sciences, Fisheries and Wildlife Science, Forestry, Natural Resources Management and Policy
Year: 2010
Authors: Nicholas Boudreau, Zachary Bozic, Geoffrey S. Carpenter, David M. Langdon, Spencer R. LeMay, Shaun M. Martin, Reid M. Mourse, Sarah L. Prince, Kelli M. Quinn, David A. Patrick