A MULTI-SCALE EVALUATION OF THE EFFECTS OF FOREST HARVESTING FOR WOODY BIOFUELS ON MAMMALIAN COMMUNITIES IN A NORTHERN HARDWOOD FOREST
Fri, 02/01/2013 - 16:19
Abstract: Forest harvesting and subsequent effects on forest structure have been shown to influence mammalian community assemblages and the abundance of individual species, however less attention has been paid to the implications of how harvested timber is used. This is particularly relevant in the Northern Forest, where a considerable portion of the forest harvesting is used to produce biofuels. Biofuels harvesting typically involves the process of whole-tree chipping which may lead to a dramatic reduction in the amount of woody material in the form of slash and coarse woody debris (CWD) left in harvested stands. The goal of our study was to assess the effects of biofuels harvesting on forest structure and subsequent effects on mammalian community structure and abundance. To address this goal, we focused on a ~35 Ha area of partially-harvested northern hardwood forest in the northern Adirondacks, New York. To sample mammals we used a combination of Sherman traps and track plates established at two scales across stands within this area. Our results showed that the response of small mammals to changes in forest structure is both species and scale specific. At the individual trap scale, CWD, slash, and understory cover were important drivers of the occurrence of individual species of small mammals. At the larger “grid” scale, small mammal relative abundance was driven by canopy cover and the density of woody stems. Our results indicate that the current harvesting practices used for biofuel production in the Adirondacks are unlikely to result in declines in abundance of common small mammal species. However, the retention of some slash post-harvest may be beneficial to some species, thus foresters may want to include slash retention when developing silvicultural prescriptions.
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Major: Environmental Sciences, Fisheries and Wildlife Science, Natural Resources Management and Policy
File Attachments: DP FOR 499 JWM manuscript 1_9_2013.docx
Managing for increased productivity and size of an American kestrel (Falco sparverius) population in northern New York
Mon, 05/07/2012 - 12:58
Abstract: American kestrel (Falco sparverius) populations have recently declined across most of the eastern states. As a result, managers and concerned citizens alike have installed nest boxes across large areas to increase productivity. Mr. Mark Manske has run one of these nest box programs in northern New York, across parts of St. Lawrence and Franklin counties, over the past ten years. Through the combination of his research and other long term management plans, the ideal future plan was developed. The focus of the new plan is to boost efficiency of resources, ease of expansion and sustain a steady or increasing population of kestrels. GIS software was used to analyze each nest boxes’ characteristics in order to develop a model that may predict areas of possible high productivity. Surveys and public outreach are emphasized to create a broader supporting base and possibly acquire future partners for land use, volunteers and advertising. The continued monitoring of the northern New York kestrel population will ensure the presence of this vital species for generations to come.
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Major: Environmental Sciences, Fisheries and Wildlife Science
File Attachments: Sauca_Final_Submision.docx
Monitoring the Zebra Mussel Invasion Front: Use of New Technology
Thu, 02/09/2012 - 15:39
Abstract: Zebra mussels are invasive mollusks that are affecting the well-being of the water bodies in the United States. This study uses environmental DNA (eDNA) is a sensitive early detection system that may be useful in monitoring their spread. The purpose of this study is to determine the effectiveness of eDNA technology in identifying infested water bodies, to determine if zebra mussel DNA is in the Adirondack water bodies not known to be infested, if the water chemistry of these water bodies is favorable for zebra mussel establishment, and if the eDNA technology is transferable to an institution like Paul Smith’s College. Eighteen lakes, all in New York State were sampled, fifteen of which are located in the Adirondack Park. DNA was extracted from water and plankton samples and species specific primers were used for PCR amplification to determine if zebra mussel DNA was present. Of seven samples taken from sites known to be infested, five of these tested positive for zebra mussel eDNA. Four lakes not known to be infested within the Park also tested positive for zebra mussel eDNA. Based on zebra mussel risk parameters (water chemistry) applied to 1,469 Adirondack water bodies, less than 3% are at risk of zebra mussel establishment. However it is possible that established populations could occur at microsites that may have locally high levels of calcium and higher pH.
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Major: Biology, Environmental Sciences, Environmental Studies, Fisheries and Wildlife Science, Forestry, Natural Resources Management and Policy
File Attachments: The Author has selected not to publish this complete work.
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.
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Major: Environmental Sciences
File Attachments: CapstoneFINAL.doc
Promoting Conservation of Biodiversity in the Adirondack Park Through Understanding and Engaging Stakeholders
Thu, 02/09/2012 - 11:31
Abstract: Anthropogenic disturbance of natural environments has led to the widespread loss of native biodiversity and degradation of ecosystems. It is increasingly recognized that addressing this “biodiversity crisis” entails understanding the societal drivers of unsustainable patterns of use. Conservation psychology is a new discipline that specifically focuses on understanding the linkages between human behavior and action and promoting a healthy and sustainable relationship between humans and nature. In this project, we employed principles of conservation psychology with the goal of improving the efficacy and efficiency of conservation of biodiversity in the Adirondack Park (AP). To meet this goal we employed three specific strategies. The first of these strategies was the use of surveys to assess the values, attitudes, and actions different stakeholders have in regards to conservation of biodiversity in the AP. These surveys were disseminated via both direct mailings and online, and included 30 questions. Our second strategy was to use discourse analysis to create a dictionary of terms and phrases employed in a positive, neutral, and negative light in regard to conservation of biodiversity. This entailed analysis of 30 emic accounts derived from opinion articles written by stakeholders in the AP, as well as analysis of a number of etic accounts drawn from online sources. Our third strategy was to use conservation psychology literature to assess ways in which the presentation of information and peer-dynamics influenced the responses of stakeholders towards conservation of biodiversity. Using the combination of these three strategies, we were able to provide a holistic understanding of how different stakeholders in the AP perceive and act towards biodiversity conservation; identify language that can be used to illicit a more positive response from these stakeholders; and identify specific tools based on principles of psychology that can encourage more active and effective engagement in conservation of biodiversity by different stakeholders. Our research findings will allow groups focusing on promoting conservation of biodiversity in the AP to be more effective and efficient in their work in the future.
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Major: Environmental Sciences, Fisheries and Wildlife Science, Forestry, Natural Resources Management and Policy, Recreations, Adventure Travel and Ecotourism
File Attachments: FOR 2011 Final Compiled Version 12_14_12.docx
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.
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Major: Environmental Sciences, Fisheries and Wildlife Science, Forestry, Natural Resources Management and Policy
File Attachments: Climate change and milfoil draft FINAL.doc