Currently found only on state and county lands in Miami-Dade and Sumter counties, the Florida bristle fern is a small, mat-forming fern that resembles mosses and liverworts. Currently, there are only two known groupings of populations of this plant. In Miami-Dade County, the fern is found in limestone solution holes in rockland hammocks on the Miami Rock Ridge. In Sumter County, the fern lives on limestone boulders under thick forest cover in moderately moist hammocks. There are only six small populations of this subspecies—four in Miami-Dade County and two in Sumter County—covering a combined total area of only 155 square feet.
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Stream-road crossings can impede the upstream and downstream movement of aquatic organisms, including fish, salamanders, and invertebrates. Consequently, the US Army Corps of Engineers worked with state and federal natural resource agencies to develop specific Regional Conditions that are intended to minimize impacts to fish passage following the construction of crossings. This website offers valuable resources to those wanting to learn more about the importance of fish passage, general methods that can be used to minimize impacts to streams, and guidance to those that are applying for permits to build culverts and bridges. Examples of fish passable and impassable crossings are provided, along with a fact sheet that describes this initiative.