Evaluating effects of Everglades restoration on American crocodile populations in south Florida using a spatially-explicit, stage-based population model

Wetlands
By: , and 

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Abstract

The distribution and abundance of the American crocodile (Crocodylus acutus) in the Florida Everglades is dependent on the timing, amount, and location of freshwater flow. One of the goals of the Comprehensive Everglades Restoration Plan (CERP) is to restore historic freshwater flows to American crocodile habitat throughout the Everglades. To predict the impacts on the crocodile population from planned restoration activities, we created a stage-based spatially explicit crocodile population model that incorporated regional hydrology models and American crocodile research and monitoring data. Growth and survival were influenced by salinity, water depth, and density-dependent interactions. A stage-structured spatial model was used with discrete spatial convolution to direct crocodiles toward attractive sources where conditions were favorable. The model predicted that CERP would have both positive and negative impacts on American crocodile growth, survival, and distribution. Overall, crocodile populations across south Florida were predicted to decrease approximately 3 % with the implementation of CERP compared to future conditions without restoration, but local increases up to 30 % occurred in the Joe Bay area near Taylor Slough, and local decreases up to 30 % occurred in the vicinity of Buttonwood Canal due to changes in salinity and freshwater flows.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Evaluating effects of Everglades restoration on American crocodile populations in south Florida using a spatially-explicit, stage-based population model
Series title Wetlands
DOI 10.1007/s13157-012-0370-0
Volume 34
Issue 1
Year Published 2014
Language English
Publisher Springer
Contributing office(s) Southeast Ecological Science Center
Description 12 p.
First page S213
Last page S224
Country United States
State Florida
Other Geospatial Cape Sable-Buttonwood Canal, Joe Bay, Taylor Slough
Online Only (Y/N) N
Additional Online Files (Y/N) N