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Effects Of Interspecific Competition, Salinity, And Hurricanes On The Success Of An Invasive Fish, The Rio Grande Cichlid (Herichthys Cyanoguttatus), O. Thomas Lorenz
Effects Of Interspecific Competition, Salinity, And Hurricanes On The Success Of An Invasive Fish, The Rio Grande Cichlid (Herichthys Cyanoguttatus), O. Thomas Lorenz
University of New Orleans Theses and Dissertations
The Rio Grande cichlid (Herichthys cyanoguttatus) has been established in the Greater New Orleans Metropolitan Area (GNOMA) for at least 20 years. It is often the most common fish species in urban canals and has also been found in natural waterways outside of the GNOMA. The effects and potential for further spread of H. cyanoguttatus is uncertain. My research addressed how extensive the cichlids spread in the GNOMA, how H. cyanoguttatus interacted with L. macrochirus, a native fish, and what salinity tolerance this species has. Surveys on Lake Pontchartrain and in the GNOMA indicated that H. cyanoguttatus is well established …
The Effects Of The Invasive Exotic Chinese Tallow Tree (Triadica Sebifera) On Amphibians And Aquatic Invertebrates, Norman Leonard
The Effects Of The Invasive Exotic Chinese Tallow Tree (Triadica Sebifera) On Amphibians And Aquatic Invertebrates, Norman Leonard
University of New Orleans Theses and Dissertations
This dissertation addresses the question of how leaf litter from trees affects animals that live in aquatic environments, with an emphasis on the effect of Chinese tallow (Triadica sebifera) leaf litter on anuran larvae (i.e., frog tadpoles). This question is important to our understanding of how allochthonous inputs to aquatic habitats drive biodiversity in wetlands. It also addresses a timely conservation concern in southeastern Louisiana where invasion by Chinese tallow trees (Triadica sebifera) is displacing native trees. The invasion process is homogenizing forest composition and changing the quantity and quality of litter inputs to ponds from those produced by a …