Role of Marsh-Mangrove Interface Habitats as Aquatic Refuges for Wetland Fishes and Other Aquatic Animals

In this study, we examined variation in the fish community of headwater mangrove creeks in response to seasonal fluctuations in freshwater flow and salinity in the southwestern region of Everglades National Park (ENP). In particular, we explored the role of low-order, ecotonal mangrove creeks as dry-season refuges for freshwater fishes. We sampled the fish community in the uppermost stretches of creeks, where habitat may be most suitable for freshwater species because of proximity to marshes and low salinity regimes. A secondary goal of this study was to compare sampling efficiency among gears. Sampling with electrofishing and gill nets targeted large fishes, whereas minnow traps targeted small fishes. Sampling focused on two regions: Rookery Branch (RB) and the North, Roberts, and Watson Rivers.