Abstract
The Naples–Dollar Bay Estuarine System (NDBES), situated in southwestern Florida, has undergone extensive modifications caused directly and indirectly by anthropogenic influences. These alterations include: (1) the substitution of mangrove-forested shorelines with concrete bulkheads and installation of residential canals; (2) installation of a regionally extensive navigational channel; and (3) canalization of the watershed, resulting in annexation of a heavily altered drainage basin ten times the size of the pre-alteration basin and with a significantly different soil and bedrock. The NDBES consists of northern Naples Bay, southern Naples Bay, and Dollar Bay, whose shorelines range from highly developed to undeveloped, respectively. This project explored the geological response of the system to these alterations using data from side-scan sonar, sediment grab samples, and vibracores. In highly urbanized northern Naples Bay, benthic substrates consist primarily of muddy sand with few oyster reefs. Southern Naples Bay and Dollar Bay, however, consist of coarser sediment, and are characterized by extensive mangrove shorelines and numerous fringing oyster reefs. The impact of anthropogenic alterations has significantly shifted sediment distributions in northern Naples Bay from a relatively coarser to a relatively fine grained substrate; to a lesser degree in southern Naples Bay, and Dollar Bay, this transition has not taken place due to the general lack of anthropogenic modifications made to this part of the system.
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Acknowledgments
Funding for this project was provided by the South Florida Water Management District. Additional support was provided by the Department of Marine Sciences, Texas A&M University at Galveston, the Texas Institute of Oceanography, Department of Oceanography, Texas A&M University and the Coastal Watershed Institute and Department of Marine and Ecological Science, Florida Gulf Coast University. The authors would like to thank Nicole Fielder, Erin Weaver, Joe Carlin, Christina Pondell, Julie Manuel, and Haley Webster for field and lab assistance.
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Communicated by Iris C. Anderson
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Dellapenna, T.M., Fielder, B., Noll, C.J. et al. Geological Responses to Urbanization of the Naples Bay Estuarine System, Southwestern Florida, USA. Estuaries and Coasts 38 (Suppl 1), 81–96 (2015). https://doi.org/10.1007/s12237-013-9704-2
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DOI: https://doi.org/10.1007/s12237-013-9704-2