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Analyzing The Diversity of Fish and Crabs in The GTMNERR
Austin O’Connor & Charles Adams-Flagler College Science Department
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Objective•Because of the threats that climate
change and humans have on estuaries, continuous monitoring of these ecosystems is needed.
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Estuaries•Spawning sites and nurseries•Habitat for inshore, non-migratory fish•Home for juvenile, migratory fish
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Biodiversity•Species richness- # of species present•Species evenness- How equal abundances
of species•A higher amount of biodiversity means a
healthier ecosystem
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MethodsSites were sampled using 50 foot seine nets to determine
abundance and diversity.
Water quality was also measured for comparisons.
This included Salinity, DO, and Temp
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MethodsEach Specimen was
identifiedLengths were measured and
recorded
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Sampling Sites
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Common Species
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Cool catches
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Simpsons Biodiversity Index
• Used to calculate Biodiversity of Each month for Washington Oaks State Park, GTMNERR Oyster Reef, and Fort Castillo De San Marcos
• Assisted by Microsoft Excel
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Results-water quality
May June July0
5
10
15
20
25
30
35
Temperature
GTMNERRCastillo de San MarcosWashington Oaks GardensTe
mpe
ratu
re (C
)
May June July0
1
2
3
4
5
6
7
8
Dissolved Oxygen (DO)
GTMNERR
Castillo de San Marcos
Washington Oaks Gardens
DO (m
g/L)
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Results-Biodiversity
May June July0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Biodiversity Index
GTMNERR
Castillo de San Marcos
Washington Oaks Gardens
Sim
pson
's Di
vers
ity In
dex
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Conclusion•All sample sites were relatively high in
Biodiversity•Temperatures ranged from 20-30C0.
Dissolved oxygen ranged from 6-9 mg/L, but was primarily around 7 mg/L
•Healthy estuarine ecosystem•Future seining can contribute more data
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Acknowledgements•GTMNERR•Flagler College•Dr. McGinley•Fellow Students•Dunkin Donuts
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Questions?