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Interactions Of Exyra Ridingsii, Riding's Pitcherplant Looper Moth And Sarracenia Flava , The Yellow Pitcher Plant, Christine A Ricci
Interactions Of Exyra Ridingsii, Riding's Pitcherplant Looper Moth And Sarracenia Flava , The Yellow Pitcher Plant, Christine A Ricci
Masters Theses & Specialist Projects
1. Exyra ridingsii is a host specific moth that spends its entire immature life cycle in the fire dependent Sarracenia flava pitcher plant. Sarracenia flava requires acidic, moist soil that undergoes frequent burns. 2. Habitat selection and the effects of fire as well as other habitat characteristics were examined for E. ridingsii during this study. 3. For this study, five sites in the Croatan National Forest were surveyed four times each year for two years. Only one site had no disturbances since 2009; the remaining four sites were evenly split with two having had burns occur in them and two …
Trophic Dynamic Interactions In A Temperate Karst River, Elizabeth Malloy
Trophic Dynamic Interactions In A Temperate Karst River, Elizabeth Malloy
Masters Theses & Specialist Projects
Surface streams in karst landscapes are often characterized by high nutrient levels due to incomplete filtration through series of innumerable, below-ground conduits. Seasonal growth of the filamentous alga, Cladophora, is typically associated with nutrient-rich waters. This research compared macroinvertebrate food web structure between riverine reaches with contrasting underlying karst topography, nutrient levels, and Cladophora cover during summer 2012 and autumn 2013. Recent work in these reaches found a high correlation between Cladophora cover and nutrient content, particularly nitrate. Four questions were addressed during this study: 1. Do longitudinal trends in algal and consumer δ13C values relate to decreased DIC availability …
Efficacy Of An Electronic Scarecrow On 4 Mammalian Crop-Raiders In Limpopo Province, South Africa, Merrie Renee Richardson
Efficacy Of An Electronic Scarecrow On 4 Mammalian Crop-Raiders In Limpopo Province, South Africa, Merrie Renee Richardson
Masters Theses & Specialist Projects
In South Africa, 2 primate species, Chacma baboons (Papio ursinus) and vervet monkeys (Chlorocebus pygerythrus), and 2 nocturnal mammals, Cape porcupine (Hystrix africaeaustralis) and bushbuck (Tragelaphus scriptus), are among many species of crop raiders. Currently, cost-effective, non-lethal solutions are lacking. From June through December 2012, I installed novel electronic scarecrows on two commercial citrus orchards and a private reserve and used video-recording remote cameras to assess cropraiders’ reactions to them in Limpopo Province, South Africa. I used focal animal sampling data from treatment and control group animals to examine differences in activity …
Wire Netting Reduces African Elephant (Loxodonta Africana) Impact To Selected Large Trees In South Africa, Kelly Derham
Wire Netting Reduces African Elephant (Loxodonta Africana) Impact To Selected Large Trees In South Africa, Kelly Derham
Masters Theses & Specialist Projects
African elephants (Loxodonta africana) are ecosystem engineers in that they substantially alter the environment through their unique foraging and feeding habits. At high densities, elephants potentially have negative impacts on the environment, specifically to large trees. Because of this, recent increases of elephants in the Associated Private Nature Reserves (APNR) on the Western Boundary of Kruger National Park, South Africa have caused concern regarding the health of several species of tree. My objective was to assess the effectiveness of wrapping protective wire netting around the trunk of the tree in preventing and reducing bark stripping by elephants. 2,668 …
Level Of Uv-B Radiation Influences The Effects Of Glyphosate-Based Herbicide On Fitness Of The Spotted Salamander, Nicholas A. Levis
Level Of Uv-B Radiation Influences The Effects Of Glyphosate-Based Herbicide On Fitness Of The Spotted Salamander, Nicholas A. Levis
Masters Theses & Specialist Projects
Numerous causes have been implicated in contributing to amphibian population declines since the 1980's, with habitat modification, ultraviolet radiation (UV-B) and environmental contaminants (such as glyphosate-based herbicide) being among the most common. This study identifies the effects of a generic glyphosate-based herbicide (GLY- 4 Plus) on mortality, immune function, body condition, and morphological plasticity of larvae of the spotted salamander (Ambystoma maculatum) under conditions that reflect open and closed canopy light regimes. Larval salamander responses to glyphosate-based herbicide varied depending on UV-B conditions. In general, it appears that an open canopy (i.e. greater UV-B exposure) may confer fitness benefits. In …