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Diversity Of Nitrogen Fixing Bacteria In A Sample Aquaponics Ecosystem, Joshua Trombley, Haley Depner
Diversity Of Nitrogen Fixing Bacteria In A Sample Aquaponics Ecosystem, Joshua Trombley, Haley Depner
Thinking Matters Symposium Archive
In natural ecosystems, nitrogen-fixing bacteria act as the primary source of useable nitrogen for many plants by converting atmospheric N2 into ammonia. In an aquaponics system, however, the primary source of ammonia is provided by fish waste. We are investigating the effect of this ammonia saturation on the diversity of nitrogen-fixing bacteria in a sample aquaponics system. We seek to answer two fundamental questions: First, what nitrogen fixing microbes are present in these systems? Second, does the character of these microbial communities have any effect on plant growth? In order to answer these questions, we first determine whether nitrogen-fixing bacteria …
Comparing Methods And Technologies For Assessing Vertical Size Distribution Of American Beech Leaves (Fagus Grandifolia Ehrh), Adeline Casali
Comparing Methods And Technologies For Assessing Vertical Size Distribution Of American Beech Leaves (Fagus Grandifolia Ehrh), Adeline Casali
Thinking Matters Symposium Archive
The American beech (Fagus grandifolia Ehrh) is a deciduous species that occurs throughout the eastern United States and Southeast Canada. This species grows 20–35 meters in height and is tolerant of a range of environmental conditions. Because beech occurs over a wide geographical and ecological range, it is ideal for comparative studies between sites or environmental conditions. Here we report on the relative size of beech leaves collected from different heights above the forest floor. We then determine if morphological trends between upper and lower canopy were consistent between live fall leaves and senesced mid-winter leaves that remain attached to …
Influence Of Indirect Cues And Vegetation Density On Foraging Behavior In Snowshoe Hares (Lepus Americanus), Zachary Lankist
Influence Of Indirect Cues And Vegetation Density On Foraging Behavior In Snowshoe Hares (Lepus Americanus), Zachary Lankist
Thinking Matters Symposium Archive
Prey avoid chemical cues from predators at feeding sites because the risk of death outweighs the benefit of food. However, we lack information regarding avoidance of chemical cues from competitors as well as how foraging behavior changes alongside vegetative cover. To test if chemical cues and vegetative cover alter prey vigilance, number of visits, and time spent at feeding sites, I observed snowshoe hares (Lepus americanus) in plots containing coyote (Canis latrans; predator) and moose (Alces alces; competitor) urine across a spectrum of vegetation densities. Snowshoe hares significantly reduced the number of visits to feeding plots when coyote or moose …