Wading Through Research

This guest post was written by Phil Matich, a graduate researcher in Dr. Mike Heithaus' lab at Florida International University.  _________________________________________________________________________   We just got back from an amazing trip in August!   As always, we left early in the morning and were fortunate enough to catch the tail end of the Perseid meteor shower as we drove to the boat ramp.   On our way to the field site we saw the sun rise over the water and the mangroves, and then got right to work catching sharks.   On the first live, we caught two sharks, 79 and 85 cm total length, and surgically implanted the smaller individual with an acoustic transmitter so that we could track its movements.   Surprisingly, the larger shark was an individual we had caught and tagged in July, and is one of the first sharks we’ve recaptured in the last three years!  

Guest Post from Alex Perez, undergraduate researcher in the Seagrass Ecosystems and Marine Macroalgae labs at FIU. --------------------------------------------------------------------------------------------------------------------------------- When one thinks of Florida Bay the connotation is that of a shallow water system that is surrounded mangrove tree islands and mud banks. The thoughts of aquatic vegetation and blue water coloration more diverse than your standard 8-pack Crayola box, is what I used to think of. That is of course before I began to notice what was soaring above the surface. My first taste of the birds of Florida Bay was an experience I have yet to repeat, one chilly winter day as we were making our run from the western portion of the Bay to the center of the Bay we came across thousands (not a hyperbole) of migratory birds. The sound of our outboard shattering the tranquil water exciting the birds to take flight, was the first time I really no...

For Long-Term Ecological Research (LTER) research in the Seagrass Ecosystems Lab, we venture out into Florida Bay every two months to do a survey of the submerged aquatic vegetation (seagrasses and macroalgae).   As I mentioned in my last post ( Florida Bay:  Beneath the Surface ) Florida Bay is a honeycomb of basins, which creates different habitat types.   These different habitats, specifically the type and density of vegetation on the floor and sediment type (and many other factors that are beyond the scope of this post), attribute to the color of the water.   In a single LTER trip, we see water ranging from deep blue to teal, green, and even brown!    After 2 years of running the LTER project for our lab, I am still amazed by the dynamic nature of Florida Bay on the surface and below.

Florida Bay consists of mud banks so intertwined it takes an experienced boater (or a great GPS chart tracker, if you’re me) to successfully navigate across the bay.   Because flow is somewhat restricted by these mud banks, the basins have developed into unique habitats making each dive of the FCE-LTER seagrass sampling project quite different.   At each of the LTER sites within Florida Bay, we estimate percent cover of all seagrass species and many calcareous green algal species, as well as red, brown, and other green algae.   We monitor water quality over time via nutrient analyses in seagrass and calcareous green algal tissue, and we collect data on salinity, temperature, light penetration, and water turbidity.   Data are located at www.fiu.edu/~seagrass .