Small Mammal Presence and Predation of Boreal Bird Nests in Forested vs. Open Peatlands in the Northern Adirondack Park, NY
Mon, 11/30/2020 - 16:07
Abstract: Recent declines of many boreal birds have been documented in the last decade and area attributed to changing climate and human development. One factor that has not been studied in the critical boreal peatland habitats in the Adirondack Park is the occurrence and influence of small mammals preying on passerine boreal bird nests. The hypotheses tested were (1) small mammals occupy forested peatlands in a higher abundance than open peatlands at the study sites and (2) boreal bird nests in forested peatlands are more likely to be preyed on by small mammals than nests in open peatlands. Baited track tubes were placed on transects within open and forested peatlands and activity was estimated from prints left on contact paper, and artificial nests and eggs were used to compare the difference in nest predation between open and forested peatlands. There was a difference in small mammal activity between forested and open bog at the Paul Smith’s VIC study area, but results were not significant at Shingle Shanty medium bog. 67% of artificial nests in the forested bog at the VIC were destroyed, and only 14% were destroyed in the open bog. At Shingle Shanty, 83% of the nests were destroyed in the forested bog and 0% of artificial nests were damaged in the open bog.
Literary Rights: On
Major: Environmental Sciences
Soil moisture levels’ impact on variation in microhabitat selection and distribution between shrub species along the riparian zones of the St. Regis River in Northern New York
Sat, 11/28/2020 - 15:42
Abstract: Willows (Salix spp.) are commonly found along riparian zones of northern latitude water bodies and are often used in riparian restoration and bank stabilization. However, not much is known about willows on a species level, especially among thee shrubby species native to North America. This study seeks to better understand the variation in the distribution of three willows (Salix bebbiana, S. discolor, and S. petiolaris) and two other shrub species (Alnus incana and Viburnum nudum) on a species level based on soil moisture. To reach this goal this study analyzes their distribution at several points along the shore of the St. Regis River. The study analyzed vertical distance from the river as a proxy for soil moisture, saturation volume as a proxy for porosity, and bulk density. It was found that soil moisture, as approximated by vertical distance was statistically significantly linked to the distribution of different shrub species. Porosity, bulk density, and distance along the river had no statistically significant relationship. The results supported the hypothesis that willows had the highest soil moisture requirements. The sample sizes were very small and only one willow, a S. petiolaris, was found in the study sites.
Literary Rights: Off
File Attachments: G.Davis_Capstone_final.docx