Santa Cruz Wharf
Wednesday, July 9, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Present
– Alexandrium: Rare
– Dinophysis: Common
– Margalefidinium: None
* Impressions *
Overcast and cool at the wharf this morning. Phytoplankton biomass and diversity decreased his week. Net tow remains mostly dinoflagellates, but Protoperidinium and Dinophysis were the most abundant. Pseudo-nitzsschia were seriata and delicatissima size and no P. australis or P. multiseries were detected this week. Alexandrium were observed in the net tow, but were not detected in the probed counts.
Dinoflagellates:
C: Protoperidinium
C: Dinophysis
C: Lingulodinium
P: Akashiwo
P: Ceratium
R: Alexandrium
R: Gymnodinium
R: Scrippsiella
Diatoms:
P: Pseudo-nitzschia
P: Eucampia
P: Coscinodiscus
R: Chaetoceros
R: Guinardia
R: Lauderia
R: Detonula
R: Thalassiosira
R: Pleurosigma
R: Asteromphalus
R: Leptocylindrus
R: Paralia
R: Actinoptychus
R: Tropidoneis
* Environmental Information *
Time: 8:45 am
Collector: M. Conci
Water Conditions (SCW)
Water Temperature: 13.5 C
Water Conditions: Calm
Water Color/Code: Green, 5G 2/6 (#31)
Water Visibility: 7 ft
Tide: Rising, High – 11:58, 3.5 ft
Surf Report: WNW swell, 4-6
NDBC buoy 46236
– Significant wave height: 0.6 m
– Swell height/direction: 0.4 m, SW
– Wind wave height/direction: 0.5 m, WNW
Weather Conditions (KudelaHawk)
Sky: Overcast/marine layer
Air Temperature: 55.0 F (12.8 C)
Wind: 3 mph, ENE
Solar radiation: 125 watts/m^2
Monterey Wharf II
Wednesday, July 9, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Rare
– Alexandrium: Rare
– Dinophysis: Present
– Margalefidinium: Rare
* Impressions *
The wharf this morning was drizzling and cloudy. The surface water had a thin layer of oil and was relatively calm. At the end of sampling the sun started to come through the clouds. The water this week was more blue/green than last week with a visibility greater than 5.0m. Visually chlorophyll decreased from last week. Dinoflagellates dominated the water column. Coscinodiscus, Protoperidinium, and Akashiwo were common (10 – 49%). Guinardia, Prorocentrum, Dinophysis, and Tintinnids were present (1 – 9%). The HAB species that were observed in the water this morning included Pseudo-nitzschia, Alexandrium, Dinophysis, Cochlodinium, and Akashiwo sanguinea.
Dinoflagellates:
C: Akashiwo sanguinea
P: Prorocentrum spp.
P: Dinophysis spp.
R: Ceratium spp.
R: Gonyaulax spinifera
C: Protoperidinium spp.
R: Alexandrium spp.
R: Scrippsiella spp.
R: Gyrodinium spp.
R: Polykrikos spp.
R: Cochlodinium spp.
R: Lingulodinium polyedrum
R: Oxyphysis
R: Pyrophacus spp.
R: Amylax
Diatoms:
R: Chaetoceros spp.
R: Thalassiosira spp.
C: Coscinodiscus spp.
P: Guinardia spp.
R: Rhizosolenia spp.
R: Tropidoneis spp.
R: Lauderia spp.
R: Navicula spp.
R: Asteromphalus spp.
R: Leptocylindrus spp.
R: Stephanopyxis spp.
R: Detonula spp.
R: Eucampia
Others:
R: Dictyocha spp.
Zooplankton:
P: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
R: Oligiotrich
R: Larvacean
* Environmental Information *
TIME: 0731 PT
COLLECTOR: Hannah McGrath
Water Temperature: 14.6°C
Water Conditions: calm
Water Color: 10 G/Y 2/4
Visibility: > 5.0 m
Tide: Rising, 0.24 m, high at 1204 h
Sky: cloudy/drizzling, 100% cloud
Air Temperature: 12.78°C
Wind: offline, 1.34m/S
Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%