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Capstone Projects

Refining Karner blue butterfly (Lycaeides melissa samuelis) restoration efforts by comparing captive rearing and release methods used in the Albany Pine Bush

Mon, 12/05/2011 - 18:36
Abstract: With this research, the release efforts of the endangered Karner blue butterfly (Lycaeides melissa samuelis) of the Albany Pine Bush (APB) in New York State at two different stages of the butterfly’s life cycle were compared. Survival success rates were determined and environmental factors were measured to assess captive rearing methods and improve restoration efforts in the APB Preserve. Captive rearing efforts have been used in the past in this area, releasing Karner blue butterfly pupae into the wild; however, this year in 2011, pupae were allowed to eclose from their chrysalides in the lab and were released into the wild as adult butterflies. The analysis of the information gathered showed that the release of Karner blue butterflies in the adult stage offered a greater survival rate over release in the pupal stage. The average daily maximum temperatures increased each year during the summers of 2009-2011. Information from this research is important to help prevent the extirpation of this species from the Albany Pine Bush Recovery Unit and may be helpful to organizations such as the US Fish and Wildlife Services and the Nature Conservancy.
Access: Yes
Literary Rights: Off
Major: Environmental Sciences
Year: 2011
File Attachments: CapstoneFINAL.doc
Authors: Chelsea Sendzik

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