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Terrestrial and Aquatic Ecology

Biology Theses

Crayfish

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Niche Modeling Of Eight Crayfish Species In Texas, Nathan Schubert Dec 2022

Niche Modeling Of Eight Crayfish Species In Texas, Nathan Schubert

Biology Theses

Freshwater species make up ~10% of all known species and occupy less than one percent of earth’s habitat, which is being degraded by human usage. Crayfish have a large impact on their aquatic or terrestrial environment and can serve as a health indicator of aquatic environments, as they generally require undegraded environments. In many habitats, crayfish make up more than half of the macroinvertebrate biomass, and play important ecological roles, as a food resource for both aquatic and terrestrial species, as predators of fish and invertebrates, and as bioprocessors of vegetation and detritus. The objective of this project was to …


Investigating The Effects Of Sea-Level Rise And Increasing Salinity On Procambarus Lunzi Of Sapelo Island, Georgia, Samuel Long Apr 2020

Investigating The Effects Of Sea-Level Rise And Increasing Salinity On Procambarus Lunzi Of Sapelo Island, Georgia, Samuel Long

Biology Theses

Barrier islands have great ecological and economical importance and face a threat from increasing sea-level due to climate change. Erosion of existing freshwater lens and ocean inundation could greatly change freshwater availability on the island. This could have significant impacts on freshwater crayfish like Procambarus lunzi, which are complexly intertwined into the trophic food web of the island. This study’s goal was to investigate the salinity tolerance of this crayfish on Sapelo Island, Georgia, in an attempt to predict the possible effects and response to sea-level rise by this crayfish. Crayfish were wild-caught from the island in March, June, and …