Santa Cruz Wharf
Wednesday, October 25, 2023
* Quick HAB Observations *
– Pseudo-nitzschia: None
– Alexandrium: None
– Dinophysis: Present
– Margalefidinium: None
* Impressions *
Another sunny, cool morning at the wharf. The water was calm and browner than usual. Phytoplankton biomass increased this week. But the phytoplankton assemblage was similar to last week, mostly dinoflagellates, mostly Prorocentrum. No Pseudo-nitzschia were observed and Alexandrium counts increased another order of magnitude this week.
Dinoflagellates:
A: Prorocentrum
P: Ceratium
P: Dinophysis
P: Noctiluca
R: Akashiwo
R: Oxyphysis
R: Oxytoxum
Diatoms:
R: Chaetoceros
R: Lauderia
R: Thalassionema
R: Rhizosolenia
Other:
R: Dictyocha
* Environmental Information *
Time: 8:45 am
Collector: M. Conci
Water Conditions (SCW)
Water Temperature: 15.5 C
Water Conditions: Calm
Water Color/Code: Brown, 5GY 3/4 (#28)
Water Visibility: 5 ft
Tide: High – 8:45, 5.0 ft
NDBC buoy 46042
– Significant wave height: 6.2 ft
– Swell height/direction: 5.6 ft, NW
– Wind wave height/direction: 2.6 ft, NW
Weather Conditions (KudelaHawk)
Sky: Sunny
Air Temperature: 53.2 F (11.8 C)
Wind: 3 mph, WSW
Solar radiation: 184 watts/m^2
Monterey Wharf II
Wednesday, October 25, 2023
* Quick HAB Observations *
– Pseudo-nitzschia: Rare
– Alexandrium: Rare
– Dinophysis: Present
– Margalefidinium: None
* Impressions *
The wharf this morning was chilly and breezy. There were a few clouds in the sky but mostly clear. The surface water appeared rough. In front of my sampling site there was a boat unloading fishing gear and nets. The water this week was a slightly darker green than last week with a visibility of 4.0m. Chlorophyll decreased from last week. Dinoflagellates dominated the water column. Prorocentrum was abundant in the water. Dinophysis, Ceratium, and Lingulodinium were present in the water. The HAB species that were observed in the water this morning included Pseudo-nitzschia, Alexandrium, Dinophysis and Akashiwo sanguinea.
Dinoflagellates:
R: Akashiwo sanguinea
A: Prorocentrum spp.
P: Dinophysis spp.
P: Ceratium spp.
R: Gonyaulax spinifera
R: Protoperidinium spp.
R: Alexandrium spp.
P: Lingulodinium polyedrum
R: Oxyphysis
R: Pyrophacus spp.
R: Amylax
Diatoms:
R: Chaetoceros spp.
R: Thalassiosira spp.
R: Coscinodiscus spp.
R: Pseudo-nitzschia spp.
R: Guinardia spp.
R: Pleurosigma spp.
R: Rhizosolenia spp.
R: Thalassionema spp.
R: Lauderia spp.
R: Navicula spp.
R: Cylindrotheca spp.
R: Striatella spp.
Others:
R: Dictyocha spp.
Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
* Environmental Information *
TIME: 0656 PT
COLLECTOR: Hannah McGrath
Water Temperature: 15.5°C
Water Conditions: rough waves
Water Color: 5Y 2/2
Visibility: 4.0 m
Tide: Rising, 1.31m, high at 0844 h
Chlorophyll: 6.207mg/m^3 by in vivo RFU
Sky: clear skies, 20% cloud
Air Temperature: 13.89°C
Wind: offline, 4.47m/S
Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%