SCCF: Will we get a rainy season this year?
The Sanibel-Captiva Conservation Foundation recently reported that August was already half over and the usual standing water in ditches on the side of the road, nor temporary wetlands filled with calling frogs and wading birds were not being seen.
“We are wondering if we will get a wet season on par with most years,” Wildlife and Habitat Management Director Chris Lechowicz said on Aug. 23. “Summer rains are critical to the success of many wildlife species, as well as certain plant communities, especially this year.”
The SCCF reported that the inundation of freshwater bodies, both natural and manmade, with saltwater from Hurricane Ian has had its effects on those wildlife communities from the loss of freshwater fish, frogs and turtles, as reported by residents, due to high salinity.
Many impounded manmade lakes in housing communities were dug over the last half century and filled naturally with freshwater from rainfall. These deep-water bodies were infiltrated by a variety of aquatic and semi-aquatic species that saw them as an oasis to exist in over the long dry season.
The American alligator, especially, migrated to the lakes as they are on average much deeper than the natural wetlands that can mostly dry up in some years. Now, with a decrease in prey items due to high salinity in the lakes, alligators and other predators appear to be moving around searching for lower-salinity waterbodies.
Heavy and sustained rainfall will drop the salinity in the impounded lakes, although it will not remove the salt. This rain will also fill many natural ephemeral wetlands that are dormant at this time.
“These temporary wetlands provide habitat for small live-bearing fish, frogs and aquatic invertebrates that depend upon freshwater to reproduce,” he said.
The SCCF reported that their offspring, such as fry, tadpoles and nymphs, provide food for a plethora of vertebrate species that need prey resources, as well as the continued sustainability of those prey species on the island.
The Sanibel River and the connected wetlands are essentially a reservoir for excess water that can be released into the bay if water levels on the island get too high.
“The recovery of the freshwater wetlands will take many years, but many wildlife taxa need the process to start now with a heavy and sustained rainy season,” Lechowicz said.