One of the interesting trees in this area of Florida is actually a non-native tree known as the Australian Pine. It was introduced in the United States in the early 1900’s and was widely used as a windbreak. Between 1993 and 2005 it has nearly quadrupled in Florida.
It is considered an invasive tree now, and it is especially not wanted near the shoreline of Pinellas because it very efficiently blocks all other plants from growing, therefore contributing to beach erosion. It’s roots are matlike but very shallow, so while they work well as a windbreak where there is hard soil, in sand they can just be pushed over in a strong wind.
The link below takes you to a YouTube video by Pinellas County, detailing the reasons and the process.