Analysis of Forage Quality in Adirondack Macrophytes: Implications for Waterfowl Nutrition
Fri, 04/29/2016 - 14:48
Abstract: To understand the relative nutritional value of macrophyte food sources for Adirondack waterfowl, the forage quality of four common Adirondack macrophytes were assessed. An analysis of two native pondweeds (Potamogeton) and two invasive watermilfoil (Myriophyllum) was conducted to deduce how invasive and native macrophytes compare in their relative concentrations of nitrogen and mineral content; important indicators of forage quality for waterfowl. Nitrogen content is used as a metric for relative concentration of protein. Macrophyte species were sampled from four Adirondack lakes of the same trophic status to account for effects of lake nutrient characteristics on plant nutrient uptake and synthesis. Total nitrogen was determined with the Kjeldahl procedure using flow injection analysis. Ash (mineral) content was acquired through high-heat burning in a muffle furnace. The invasive watermilfoil species had a higher percentage of nitrogen than the native species. There was no significant difference in the ash content between the species. It is critical to understand the ecological function of these species in relation to wildlife populations. The nutritional value of these aquatic macrophytes may have implications for the fitness and distribution of breeding herbivorous waterfowl in Adirondack lakes. These results may indicate that invasive plants will serve as a viable food source for herbivorous waterfowl as watermilfoil continues to spread across Adirondack aquatic systems.
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File Attachments: Bianca Fournier Capstone Draft 4th Edit.docx
Walden Pond: Ecological and Anthropological History Reflected in the Sedimentary Record
Tue, 05/03/2016 - 23:13
Abstract: This study examined environmental changes reflected in the microfossil record of a sediment core taken in August 2015 from Walden Pond, Massachusetts spanning the last 600 years. In particular changes in the eutrophication status, inorganic sediment deposition due to land use, lake water depth and temperature were examined using phytoplankton indicator species—diatoms and chrysophytes— to reconstruct environmental conditions. The study site was a basin shallower and closer to the source of anthropogenic N and P inputs than the site of previous studies at Walden’s deepest basin, allowing for finer detection of changes in water level and organic content of sediment. A gravity corer was used to collect the sediment core to preserve topmost sediment layers for analysis, as more than a decade has passed since the last published study of this kind at Walden Pond by Köster et. al. (2005). Results show a significant increase in indicators of eutrophic lake conditions since European settlement ca. 1630, and especially since the 20th century. However, relative Asterionella formosa and Synedra nana abundances had not changed significantly in the last decade since Köster et. al.’s 2005 study, and have in fact decreased somewhat, suggesting water treatment efforts by the Massachusetts Dept. of Environmental Protection (DEP) have had some success. Loss on ignition (LOI) of organic content shows a precipitous decline from the mid 19th century from 37% to 22%, representing intensive land clearance and development until the 1970’s when DEP management began. After that point, LOI rose, perhaps due to increased lake productivity, and has fluctuated around 25%. Relative Discostella stelligera abundance, while used in the WAl-3 piston core as a proxy for water depth, could not be used in the WAL-1 gravity core from this study as eutrophication has significantly impacted their abundance. Chrysophyte scale:diatom ratios corroborate an observed trend of increasing abundance in lakes globally since the 20th century, perhaps in response to rising global temperatures over the same period.
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File Attachments: Capstone Paper.docx
White-tailed Deer Browse Preference: A Comparative Study of the Catskill and Adirondack Mountain Regions, New York State
Tue, 05/05/2015 - 14:23
Abstract: Abundant white-tailed deer (Odocoileus virginianus) in New York State, United States, affect forest regeneration and stand composition through feeding (browse) pressure. White-tailed deer browse preference of six different hardwood tree species in two mountain ranges, the Catskill and Adirondack Mountains, within New York State were compared in order to determine the extent of browse selection by deer. There were no statistically different browse selection by white-tailed deer within the Catskills or Adirondack study area or between each study site. Visual analysis of the study areas after concluding the study revealed that red maple (Acer rubrum) was the preferred browse species at each study site.
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Major: Biology, Natural Resources Management and Policy
Examination of Potentially Ectoparasite-driven Behavior in Burrowing Owls: Tests of Alternative Hypotheses
Thu, 05/07/2015 - 19:06
Abstract: Burrowing Owls (Athene cunicularia) and their nests harbor at least 39 species of arthropods from 21 different families. Among the ectoparasites on Burrowing Owls are fleas, which are primarily Pulex irritans (Family Pulicidae), the human flea. Fleas can number in the hundreds on individual Burrowing Owls. Thus, we hypothesized that flea infestation has shaped Burrowing Owl behavior to avoid the costs of ectoparasitism. As part of experiments using infrared trail cameras deployed at Burrowing Owl nests in southern Idaho ¬¬during 2012-2013, we noticed apparent sunning behavior in both adult and nestling Burrowing Owls. Camera images captured owls lying on the ground with wings outstretched and flat. We only observed this behavior during daylight hours, although cameras were active for 24 h/day. Sunbathing in birds is often associated with ectoparasite reduction, although sunning has not previously been examined in relation to flea infestation. During 2014 we conducted an experiment that included fumigating some nests with a flea removing insecticide and examined the prediction that sunbathing would occur more frequently in control nests where ectoparasites remained. As sunning was not during the coolest parts of the day, it did not appear to function for warming. Also, we ultimately found no difference in the frequency of sunning in fumigated and control nests, and there was no relationship between sunning and abundance of fleas on owls. Thus, the evidence is not consistent with the ectoparasite hypothesis, as owls sunned irrespective of flea load. We also evaluated the alternative hypotheses that sunning was related to thermoregulation, anting, drying or feather degrading bacteria. The first three we were able to reject, and the last will need future research.
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File Attachments: The Author has selected not to publish this complete work.
Wed, 04/29/2015 - 11:21
Abstract: Topaz Detailing plans to be the only mobile detailing presence in the northern Bergen County NJ area that people trust their cars with. Trust us how? Trust us in making their car look as good as or better than the day they drove it off the lot. The service that Topaz Detailing provides uses a very safe paint correction process that has been in used all over the world for many years. The process can be used to correct anything from holograms, swirl marks and shallow scratches in the clear coat of the car caused from daily driving and use of improper materials. Using this method by repeating certain key steps can remove up to 100% of the visible blemishes on the paint can be corrected while making the car look like new. The full paint correction process starts with a basic waterless wash with distilled water and lubricants to get rid of most of the contaminants. Second, the car will be clayed to remove the contaminants were not removed from the first step and that can’t be seen. Third, the car will be compounded with a dual action orbital polisher to remove most of the swirl marks and scratches, this step may be repeated as many times as necessary to achieve desired results. Fourth, the car will be polished with oils; this will give the car (especially darker ones) a high gloss as well as remove very minor swirl marks. Finally, the car will be given two thin protective coats of wax which helps improves appearance as well as act as a barrier that will protect the paint from the elements. This simple process is what automotive detailers around the world use. Short-term goals for Topaz Detailing would be to stay in business and expand our customer base so we can saturate the market in Northern Bergen County and surrounding towns. Long-term goals would be to expand the business and get a garage so detailing can be done in the winter months and on rainy days. Another automotive detailer will be hired to operate the van and still keep our business mobile. What makes Topaz Detailing special: as opposed to the competitors in the area, Topaz Detailing will be run out of a van. This gives the company a few specific advantages A) customers will find it more convenient that the detail shop comes to them B) they will not have to worry about getting the car they need to detail to the shop and find a ride back and C) customer will not have to waste any valuable time getting the car to a shop, we come to you!
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Major: Business Management and Entrepreneurial Studies
File Attachments: Topaz Detailing 2.docx