Cazenovia College is a small, independent, co-educational, baccalaureate college, located in Cazenovia, New York. Cazenovia offers a comprehensive liberal arts education with academic and co-curricular programs devoted to developing leaders in their professional fields. Cazenovia College has been named one of "America’s Best Colleges" by U.S. News & World Report for a number of years. Wikipedia.
Bried J.T.,Albany Pine Bush Preserve Commission |
Hager B.J.,Cazenovia College |
Hunt P.D.,Audubon Society of New Hampshire |
Fox J.N.,Carleton University |
And 2 more authors.
Insect Conservation and Diversity | Year: 2012
1.Repeat surveys are needed to capture a representative spectrum of adult odonate richness at a site, but specifics on frequency and duration of surveys and associated inferential biases are poorly understood. 2.Weekly 1h surveys of mature male dragonflies and damselflies were repeated at least 15 times at 19 ponds, lakes and wetlands scattered throughout North America. For each site, we tallied the data remaining when the weekly frequency was reduced to 75% (every 1.5weeks), 50% (biweekly), 33% (triweekly), and 25% (monthly) and the 1h survey to 50, 40, 30, 20 and 10min subsets. 3.Reducing the original effort by half (i.e. to 30min biweekly) retained about 80% of the species on average. The smallest effort (10min monthly) retained about 49% of species. The greatest rate of information loss occurred between 20 and 10min. 4.Across-site analysis found that data subsets correlated to the original data set (r>0.81) despite up to 50% species loss. Strong correlations (r≥0.98) remained with 10-15% species loss. 5.Biweekly surveys lasting 20-40min each may provide a representative and cost-effective sample of adult odonate richness in lentic study sites. Losing a handful of species should not greatly undermine richness and compositional comparisons among sites.. © 2011 The Authors Insect Conservation and Diversity © 2011 The Royal Entomological Society.
Caputo J.,SUNY College of Environmental Science and Forestry |
Beier C.M.,SUNY College of Environmental Science and Forestry |
Groffman P.M.,Cary Institute of Ecosystem Studies |
Burns D.A.,U.S. Geological Survey |
And 3 more authors.
Ecosystems | Year: 2015
Demand for woody biomass fuels is increasing amidst concerns about global energy security and climate change, but there may be negative implications of increased harvesting for forest ecosystem functions and their benefits to society (ecosystem services). Using new methods for assessing ecosystem services based on long-term experimental research, post-harvest changes in ten potential benefits were assessed for ten first-order northern hardwood forest watersheds at three long-term experimental research sites in northeastern North America. As expected, we observed near-term tradeoffs between biomass provision and greenhouse gas regulation, as well as tradeoffs between intensive harvest and the capacity of the forest to remediate nutrient pollution. In both cases, service provision began to recover along with the regeneration of forest vegetation; in the case of pollution remediation, the service recovered to pre-harvest levels within 10 years. By contrast to these two services, biomass harvesting had relatively nominal and transient impacts on other ecosystem services. Our results are sensitive to empirical definitions of societal demand, including methods for scaling societal demand to ecosystem units, which are often poorly resolved. Reducing uncertainty around these parameters can improve confidence in our results and increase their relevance for decision-making. Our synthesis of long-term experimental studies provides insights on the social-ecological resilience of managed forest ecosystems to multiple drivers of change. © 2015 Springer Science+Business Media New York
Bried J.T.,Oklahoma State University |
Dillon A.M.,Albany Pine Bush Preserve Commission |
Hager B.J.,Cazenovia College |
Patten M.A.,University of Oklahoma |
Luttbeg B.,Oklahoma State University
Freshwater Science | Year: 2015
For dragonflies, the final exuviae are the most identifiable nymphal stage, can substitute for lethal processing of live animals, and definitively indicate life-cycle completion or reproductive success. However, dragonfly exuviae are difficult to find and identify relative to adults, and species richness in exuvial surveys is generally biased low. We tested readily acquired information in adult surveys as indicators of exuviae presence and, therefore, species residency. Repeated concurrent surveys of adults and exuviae were completed at 32 wetlands in New York and 30 wetlands in Oklahoma, USA. We modeled the occurrence of exuviae as logit-linear functions of adult abundance, detection frequency (across surveys), teneral frequency, and frequency of breeding behavior while controlling for imperfect detectability. Exuviae occupancy probabilities suggested several reliable indicators of species residency: 1) finding adults on >4 surveys, 2) finding tenerals on >2 surveys, and 3) counting >20 adults on >1 surveys (with caveats). The odds of exuviae occurrence when these conditions were met were 9 to 18× greater than when no adults were detected. Species residency may be accurately inferred during adult surveys, potentially improving freshwater applications and conservation via dragonflies. © 2015 by The Society for Freshwater Science.
Hager B.J.,Cazenovia College |
Kalantari N.J.,Cazenovia College |
Scholten V.A.,Cazenovia College
Northeastern Naturalist | Year: 2012
Given the presence of foraging and reproducing adult Cordulegaster (spiketail) dragonflies in Nelson Swamp (Madison County, NY), we examined nymph distribution and abundance in the seeps and springs found within the swamp. From 9 September4 November 2010, we surveyed 8 sites along Chittenango Creek in order to determine: (1) the species present and their distribution/occurrence among sites, (2) factors influencing species presence and abundances, and (3) patterns in size and age distribution among and within sites. For sites, we delineated habitat zones (inlet, middle, outlet), determined the benthic substrate, and measured shoreline perimeters. For nymphs, we measured head width, body length, and wing pad length and identified some to species. The majority of spiketails we identified were Cordulegaster diastatops (Delta-spotted Spiketail); Cordulegaster maculata (Twin-spotted Spiketail) was also present. Most nymphs occurred in inlets with muck and cobble bottoms and in water depths less than 10 cm. Spiketail densities ranged from 0.138.13 individuals/m of shoreline. Smaller individuals occurred in cobble substrate, while muck substrates had individuals of larger size and greater abundance. We demarcated at least 2 age cohorts of nymphs based on their body measurements in relation to growth patterns observed in other spiketail species.
Cazenovia College | Date: 2012-08-21
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