We learned about how the present of oyster reefs can affect
other factors within a hard bottom community. With the Shannon’s index that we
calculated, had a positive correlation with the presence of oysters. If there
were oysters present, the diversity was high. This is because the oysters were filtering out the waste in that habitat giving the water a lower turbidity.
When the oysters were observed in that habitat, the ecosystem had more
structure promoting more biodiversity among organisms. The opposite is true
when the oysters were not observed in this ecosystem. When the turbidity of the
water was very high, it caused higher light attenuation, and lower species diversity
was measured.
We also learned about soft bottom habitats where sea grass
was the most dominant. In order to have high functional diversity, many
different species need to have different ecological roles. The habitat needed to
have structure, and a large amount of sea grass that can photosynthesize properly. This
also ties into the turbidity of the water, the lower the turbidity of the water
the more sea grass is present because light is a limiting factor. In the areas where the water is more turbid,
algae was more present in the water as compared to the amount of sea grass. We
also found an interesting correlation between the amount of star grass that was
present in a site, and the amount of brittle stars that were observed on the
bottom. This might have happened because the water was very shallow, and had
the lowest turbidity out of all the sites that were visited.
This week was a lot of hard work, and a lot of fun at the
same time. It was awesome being on the boat every day, and doing species
surveys. I am excited for next week in St. Pete!
Great post Taylor! I'm also curious about the correlation between the Star Grass and the Brittle Stars.
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