Santa Cruz Wharf
Wednesday, April 30, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: None
– Alexandrium: Rare
– Dinophysis: Present
– Margalefidinium: None
* Impressions *
Another cool and overcast morning at the wharf. Phytoplankton biomass increased this week and diatoms were the dominant group. Skeletonema was the most abundant genus. No Pseudo-nitzschia were observed in the net tow and no P.australis or P. multiseries were detected in the probed counts. Alexandrium concentrations increased this week.
Dinoflagellates:
P: Protoperidinium
P: Dinophysis
R: Akashiwo
R: Alexandrium
R: Ceratium
R: Prorocentrum
R: Gymnodinium
R: Noctiluca
R: Boreadinium
R: Pyrophacus
Diatoms:
A: Skeletonema
C: Thalassiosira
P: Eucampia
P: Thalassionema
P: Guinardia
R: Chaetoceros
R: Detonula
R: Lauderia
R: Pleurosigma
R: Asteromphalus
R: Ditylum
R: Licmophora
R: Paralia
R: Rhizosolenia
R: Coscinodiscus
R: Odontella
R: Nitzschia
* Environmental Information *
Time: 8:30 am
Collector: M. Conci
Water Conditions (SCW)
Water Temperature: 13.4 C
Water Conditions: Calm
Water Color/Code: Green, 10GY 3/4 (#29)
Water Visibility: 3 ft
Tide: Rising, Low – 7:23, -1.5 ft
Surf Report: WNW swell, 4-5
NDBC buoy 46236
– Significant wave height: 1.3 m
– Swell height/direction: 0.7 m, WNW
– Wind wave height/direction: 1.1 m, WNW
Weather Conditions (KudelaHawk)
Sky: Overcast
Air Temperature: 51.6 F (10.9 C)
Wind: 2 mph, W
Solar radiation: 78 watts/m^2
Monterey Wharf II
Wednesday, April 30, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Present
– Alexandrium: Rare
– Dinophysis: Rare
– Margalefidinium: None
* Impressions *
The wharf this morning was chilly and cloudy. The surface of the water was calm and glassy. The water this week was greener than last week with a visibility of 5.0 m. Chlorophyll increased from last week. Diatoms dominated the water column. Skeletonema and Chaetoceros were common (10%-49%) in the water. Thalassiosira, Guinardia, Pseudo-nitzschia, Thalassionema, Asterionellopsis, and Eucampia were present (1%-9%). The HAB species that were observed in the water this morning included Pseudo-nitzschia, Alexandrium, Dinophysis and Akashiwo sanguinea.
Dinoflagellates:
R: Akashiwo sanguinea
R: Prorocentrum spp.
R: Dinophysis spp.
R: Ceratium spp.
R: Gonyaulax spinifera
R: Protoperidinium spp.
R: Alexandrium spp.
R: Gyrodinium spp. (pink tipped)
R: Lingulodinium polyedrum
R: Pyrophacus spp.
R: Amylax
Diatoms:
C: Chaetoceros spp.
P: Thalassiosira spp.
R: Coscinodiscus spp.
P: Pseudo-nitzschia spp.
R: Ditylum spp.
P: Guinardia spp.
R: Pleurosigma spp.
R: Rhizosolenia spp.
P: Thalassionema spp.
C: Skeletonema spp.
R: Tropidoneis spp.
R: Lauderia spp.
R: Cylindrotheca spp.
R: Licmophora spp.
R: Odontella spp.
P: Asterionellopsis spp.
R: Detonula spp.
P: Eucampia
R: Entomoneis
Others:
R: Phaeocystis spp. (singletons and clumps)
Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
R: Oligiotrich
R: Larvacean
* Environmental Information *
TIME: 0811 PT
COLLECTOR: Hannah McGrath
Water Temperature: 13.1°C
Water Conditions: calm/ glassy
Water Color: 5Y 2/2
Visibility: 5.0 m
Tide: Rising, -0.49m, high at 1436 h
Sky: cloudy, 100% cloud
Air Temperature: 11.11°C
Wind: offline, 3.13 m/S
Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%