1. An Introduction to Algal Blooms in the Lower James River, VA March 28, 2015

2. Lower James River is unique
Salinity regimes (ppt)
TF: 0-5.5
OH: 0.5-5
MH: >5-18
PH: >18

3. Monitoring and research efforts
CONMON
DATAFLOW

4. Monitoring and research efforts

5. Most common spring bloom former – Heterocapsa triquetra

6. Most common summer bloom former – Cochlodinium polykrikoides

7. Most common summer bloom former – Cochlodinium polykrikoides
Photo credit: VIMS aerial 30Aug14

8. Environmental effects
Compilation of results from toxicity assays showing minimum cell densities of Cochlodinium at which >20% mortality of the test organism was observed. Asterisks denote trials with James River strains.

9. Environmental effects
Frequency of exceeding specified cell density thresholds of Cochlodinium in relation to CHLa for the meso- and polyhaline segemnts of the James. Data from Todd Egerton (ODU).