1. Nutrients and Karenia Blooms - The Application of ArcGIS in HAB research Bingzhang Chen Marine Science Institute November, 18th, 2004

2. Karenia K. Mikimotoi K. Brevis produces hemolytic compounds
Very similar appearance and size to K. Brevis
produces hemolytic compounds
Respiratory irritation for humans
K. Brevis
Unarmored dinoflagellate, about 18–45 µm in size
Icthyotoxic,
Can kill mammals

3. Goal: find out the relationship between nutrients and Karenia blooms Karenia ~ [TIN] Karenia ~ [PO4]

4. Data Source
Red Tide Monitoring Project conducted at Marine Science Institute (MSI), UT.
Time Range: 1 Nov., 1998 – 10 April, 2001
Data Types: Karenia cell counts,
Chlorophyll a,
TIN,
Phosphate

5. Study Area
Five regular sampling sites for the Coastal Fisheries Divisions (TPWD) finfish surveys along the Texas coast.

6. Using ArcGIS Display basemap and monitoring points in ArcMap.
2. Construct a large TimeSeries table.

7. Using ArcGIS
3. Use Tracking Analyst to track the changes of Karenia cell densities and nutrient concentrations.

8. Use Tracking Analyst to track a minor red tide event in Oct/Nov, 1999
Before the occurring of this red tide (9/20/1999):

9. Use Tracking Analyst to track a minor red tide event in Oct/Nov, 1999
10/5/1999, TIN increased.

10. Use Tracking Analyst to track a minor red tide event in Oct/Nov, 1999
10/20/1999, the Karenia bloom occurred and TIN decreased.

11. Use Tracking Analyst to track a minor red tide event in Oct/Nov, 1999
11/5/1999, the Karenia bloom persisted and nutrients were still low.

12. Use Tracking Analyst to track a minor red tide event in Oct/Nov, 1999
12/5/1999, the Karenia bloom disappeared and TIN levels appeared to increase again.

13. Some Results
Tracking Analyst is a good way to represent the variations of Karenia cell numbers and nutrient levels.
Karenia can survive and bloom in low phosphate environment.
70% of Karenia blooms occurred during autumn and winter.
No significant correlations exist between TIN and phosphate.

14. Any good ideas to work on these data?
Statistics ?

15. Thank you!