Mangroves are quintessentially tropical and take root along the coast of the Everglades and the Keys where they are home to colorful fish and crabs. But these plants are not marooned in South Florida anymore. WFSU went searching for mangroves along the states Gulf Coast.

Historically, scientists believed mangroves didnt live farther north than Cedar Key, in the middle of Floridas Big Bend. But thats not the case anymore. I went exploring with a scientist named Caitlin Snyder whos based at the Apalachicola National Estuarine Research Reserve.

Not many trees can really deal with this type of environment of such high salinities and changing either from storms or tides, Snyder said.

We hiked into a place called East Hole, eighty miles south of Tallahassee. Theres a little spit of beach flowing into a winding series of shallow tide pools, edged with marsh grasses. Snyder has done some monitoring here before.

When I come out here Ill usually take a GPS point of the individual, and I get an estimate on the height. Ill take note of any leaf damage, if the tips are black say from a freeze event, whether there's any insect damage, just kind of overall condition that I see, she said.

And then we began to spot them, jutting out of the olive green blanket of salt marsh. Maybe two feet tall, these arent extensive forests like in South Florida, but individual trees scattered in the grass.

And even though these plants are in a strange new habitat, theyre vibrant and healthy. There are many factors that determine where a mangrove will take root. But theyre ultimately at the mercy of hard freezes, according to research ecologist Michael Osland with the U.S. Geological Survey.

Be they mangroves, be they invasive plants, invasive species, any tropical organism, these freeze events play a really important role in setting the northern limit of those species," Osland said.

Hes watching the mangrove migration all across the Gulf Coast, where there havent been many hard freezes lately.

So with climate change, as we get a shift in the frequency and intensity of those events, its gonna allow those tropical species to move northwardand small changes in air temperatures can trigger these really dramatic, what we call ecological regime shift, Osland said.

Ecological regime shift. Sounds scary, right? Marsh grasses and mangroves are both really beneficial. And theyre both foundational species, meaning everything else in the ecosystem revolves around them. So when one of those bedrock species is replaced by another, it could spell chaos. But Osland says its too soon to know if the change will be good or bad.

In other areas mangrove expansion to salt marsh could be beneficial in terms of increased carbon storage, or wave attenuation. But that said, there will be some pretty big shifts for the habitat that these systems support, Osland said.

But Osland says as the effects of climate change intensify, mangroves will continue to force out salt marshes along the Gulf Coast.

To be clear, mangroves are not taking over the Panhandle yet. But Caitlin Snyder says they are here to stay.

I think were kind of at that tipping point where freeze events can still knock them back, but I think theyre here, Snyder said.

The question is, where will the mangroves show up next? And what will survive under the new regime?

Read more:

North Florida Mangroves Could Pose Threat To Coastal Ecosystem - WFSU