After a long trip from the beautiful Florida Keys to FGCU, I
was unsure of what to expect from our third week on this amazing trip around
Florida. I knew we would be exploring Estero Bay and utilizing the Vester
Marine Field Station, but was eager to see what awaited us this past week.
One of the many crabs our lift nets brought up |
We hit the ground running Monday with an inside look at four
different oyster reef locations around Estero Bay. At each site the following
was assessed: benthic biodiversity surveys, lift net biodiversity collection, horizontal
secchi depth, and total vertical depth measurements. The data we collected was
used to analyze each site’s biodiversity to compare to their respective abiotic
environment. We were interested in seeing what factors could be influencing the
species assemblages at each location. It was interesting to see that each site
had little similarity after running Sørensen’s
similarity coefficient analysis. This was a new, simple equation I will be
taking away from this week to utilize back at UNF as it is an easy way to
compare similarity between sites. Personally, I love looking at community
assemblages and what factors influence them, and this exercise helped to reaffirm
that passion along with giving me new tools to utilize in the future that I had
not learned about before.
Teamwork is needed to collect cores |
The team that made it to Mound 1 |
Tuesday was probably the
most exciting and challenging day. When I first saw that we would be collecting
core samples in Estero Bay, I had no idea what to expect as the only experience
I had was soft sediment cores. I can say for sure that soft sediment cores are
no comparison to the roughly four-meter core we collected at our reef site. It
was tough, muddy work trying to get the core into the ground, but even more
difficult getting it out without damaging the core. Yet all that sweat was
worth it when we cracked it open back at Vester. When I first heard Dr.
Savarese explain that this core dated back roughly 4000 years, and that the
oldest facies in the core belonged to an upland forest I was stunned. To learn
that what was now an oyster reef was once an upland forest with no marine influence
was astonishing. I couldn’t help but ponder the future of our current coastlines
and estuaries as sea levels continue to rise in this present day and age. If we
are also in a state of coastal transgression, it is saddening to think of all
that could be lost due to human greed and carelessness. These new insights into
the past reaffirmed my passion for coastal and estuarine conservation. However,
this wasn’t the only look into the past we were able to experience that day. We
also had the privilege to visit Mound Key in the Estero Bay and learn about the
Calusa Native Americans history at this location. A small group of us even trekked
up to the top of Mound 1 on the small island, which once was the home of the
king of the Calusa people.
Managed to find my first Nine Armed Sea star, Luidia senegalensis |
Wednesday was similar to
Monday, but instead the focus was on seagrass communities not oyster reefs. We
collected water quality measurements, horizontal secchi depth, benthic
biodiversity estimates, sediment cores, and Virnstein samples at 6 different locations in the Estero Bay. The data
was again utilized to assess what factors may be influencing the biodiversity
at each location. The hardest part of the day was probably collecting the Virnstein
samples as this was a foreign device and technique that took a few sites to get
to work halfway decent.
The team that got lost in the Imperial River |
Our final day of field work
on Thursday consisted of a short lecture on currents by Dr. Parsons followed by
a kayaking and canoeing expedition around Estero Bay with grapefruits. We all
split up in teams of two armed with a GPS device, a watch, and two grapefruits
to help track the currents in Estero Bay. The grapefruits, which my partner and
I lovingly named Bobby and Bobby 2.0, were deployed for 10 minute intervals
with their starting and ending longitude and latitude measured for each
deployment. The best part of the day had to be when my partner and I somehow
managed to get lost by traveling up into the Imperial River. Thankfully we found
a local on the riverbank who was able to inform us of what way to travel to get
back to the bay. It was interesting to see the big picture after mapping out
everyone’s grapefruit trajectories along with temperature and salinity
measurements taken at different parts of the bay and river. I’ve heard of Lagrangian
particle dispersion models before when learning about larval ecology, but getting
to see it in action was worthwhile hands on experience.
A glimpse into the teamwork that went into trying to identify the organisms in our samples |
Overall the week was an insightful look into the challenges
of biodiversity assessment that ecologists that specialize in this face. As
someone who might one day want to do this work, it was important for me to see
all the not so fun aspects of this line of work. The most challenging part had
to be the identification aspect. Seeing how hard it can be to identify
organisms when you have no idea where to start was a little intimidating, but
it just makes me want to get better at identification. I hope to take classes
now on crab, fish, and mollusk identification to help in the future. This knowledge
could be highly beneficial in community analysis, and reduce the hours spent
laboring over field samples.
Interesting reflections about the geological core, and how what is upland now may become marine before too long if we're not careful.
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