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Effect of Freshwater Inflow on
Mobile Epifauna in Rincon Bayou, TX
Andres Gonzalez
Dr. Paul Montagna
About Me
• Born and raised in Phoenix, Arizona
• Major in Environmental Science
• St. Mary’s University, San Antonio ,TX
• Senior, Graduating May 2016
• Interested in Sustainable Urban Development
• Looking for a job, and applying to graduate
school.
Dr. Paul Montagna
Endowed Chair for Ecosystem Studies and Modeling
• Works to understand how freshwater inflow is
affecting estuary ecosystems and organisms
• Member of many organizations, including the
Texas Environmental Flows Science Advisory
Committee
• Participated in more than
250 technical reports and
publications.
RinconBayou
• Reduced freshwater inflow altered salinity and water
quality of Rincon Bayou and Nueces Bay
• Hydrological restoration was performed to enhance
flows to Rincon Bayou and the marsh
Field Work
• Seine net samples
• Push net samples
• Epibenthic zone
• Near edge of marsh
Lab Work
• Samples collected
every two weeks
• Quantitative data
• Counts number of
organisms per
sample
• Identify species of
each organism
• Organize samples
• Separate by
species
• Placed in ethanol
solution for archiving
• Placed back into jars
for future reference
Principle Component
Analysis (PCA)
• PCA displays how
relatable different
variables are in a multi-
parameter dataset
• Inverse relationship
between Temperature
(Temp) and Dissolved
Oxygen (DO)
• Species samples on a scaling plot
• Circles indicate similarity of at least 30%
• Seasonality is a strong indicator of prevalent species
Conclusions
• When water temperature is low, the dissolved
oxygen is higher, which correlates to higher
species abundance.
• Seasonality affects the amount of freshwater
inflow, which in turn changes the amount and
types of organisms present
• Further study needed on biomass and size of
organisms in samples.
Metadata
• Catch types
– Seine vs. Push net
• Sample dates
– From April 2010 to July 2015
• Sampling sites
– Site C, F, and G
• Sonde
Things I Learned
• Marine ecology has a direct impact on human
health and local economy.
• Minimum fresh water inflow standards should
be in place for more estuaries.
• How to work in a professional lab
environment, many different backgrounds.
• Workplace accountability
• Advice for Grad School, employment, life
Challenges
• All data and the analysis
in this presentation is
preliminary
• Joined project at the
beginning
– Built the project and
methods while gathering
data
– Bi-weekly lab project
meetings yielded more
questions and issues
• Field work can lead to
accidents
NOAA NGI
Internship Program
• Memories
• Life lessons
• Appreciation
• NOAA career
• Open doors
Thank you to:
• Harte Research
Institute:
– Noe Barrera
– Debra Hoekel
– Larry Hyde
– Rick Kalke
– Katherine Lavelle
– Elani Morgan-Eckert
– Terry palmer
– Michael Reuscher
– Sara Smith
– Jason Williams
– Paul Montagna
– Crystal Chaloupka
– Meredyth Herdener
– Melissa Rohal
– Travis Washburn
– Amanda Gordon
– Meagan Hardegree
– Katy Gerard
– Luke Eckert
• Dauphin Island Sea Lab:
• Dr. Tina Miller-Way
• Rachel McDonald

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NOAA- Presentation Draft2

  • 1. Effect of Freshwater Inflow on Mobile Epifauna in Rincon Bayou, TX Andres Gonzalez Dr. Paul Montagna
  • 2. About Me • Born and raised in Phoenix, Arizona • Major in Environmental Science • St. Mary’s University, San Antonio ,TX • Senior, Graduating May 2016 • Interested in Sustainable Urban Development • Looking for a job, and applying to graduate school.
  • 3. Dr. Paul Montagna Endowed Chair for Ecosystem Studies and Modeling • Works to understand how freshwater inflow is affecting estuary ecosystems and organisms • Member of many organizations, including the Texas Environmental Flows Science Advisory Committee • Participated in more than 250 technical reports and publications.
  • 4. RinconBayou • Reduced freshwater inflow altered salinity and water quality of Rincon Bayou and Nueces Bay • Hydrological restoration was performed to enhance flows to Rincon Bayou and the marsh
  • 5. Field Work • Seine net samples • Push net samples • Epibenthic zone • Near edge of marsh
  • 6. Lab Work • Samples collected every two weeks • Quantitative data • Counts number of organisms per sample • Identify species of each organism
  • 7. • Organize samples • Separate by species
  • 8. • Placed in ethanol solution for archiving • Placed back into jars for future reference
  • 9. Principle Component Analysis (PCA) • PCA displays how relatable different variables are in a multi- parameter dataset • Inverse relationship between Temperature (Temp) and Dissolved Oxygen (DO)
  • 10. • Species samples on a scaling plot • Circles indicate similarity of at least 30% • Seasonality is a strong indicator of prevalent species
  • 11. Conclusions • When water temperature is low, the dissolved oxygen is higher, which correlates to higher species abundance. • Seasonality affects the amount of freshwater inflow, which in turn changes the amount and types of organisms present • Further study needed on biomass and size of organisms in samples.
  • 12. Metadata • Catch types – Seine vs. Push net • Sample dates – From April 2010 to July 2015 • Sampling sites – Site C, F, and G • Sonde
  • 13. Things I Learned • Marine ecology has a direct impact on human health and local economy. • Minimum fresh water inflow standards should be in place for more estuaries. • How to work in a professional lab environment, many different backgrounds. • Workplace accountability • Advice for Grad School, employment, life
  • 14. Challenges • All data and the analysis in this presentation is preliminary • Joined project at the beginning – Built the project and methods while gathering data – Bi-weekly lab project meetings yielded more questions and issues • Field work can lead to accidents
  • 15. NOAA NGI Internship Program • Memories • Life lessons • Appreciation • NOAA career • Open doors
  • 16. Thank you to: • Harte Research Institute: – Noe Barrera – Debra Hoekel – Larry Hyde – Rick Kalke – Katherine Lavelle – Elani Morgan-Eckert – Terry palmer – Michael Reuscher – Sara Smith – Jason Williams – Paul Montagna – Crystal Chaloupka – Meredyth Herdener – Melissa Rohal – Travis Washburn – Amanda Gordon – Meagan Hardegree – Katy Gerard – Luke Eckert • Dauphin Island Sea Lab: • Dr. Tina Miller-Way • Rachel McDonald