Santa Cruz Wharf
Wednesday, May 14, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: Common
– Dinophysis: Present
– Margalefidinium: None
* Impressions *
Another overcast and cool morning at the wharf. Phytoplankton biomass increased this week and the net tow remains mostly diatoms, but dinoflagellate abundance increased dramatically from last week. Pseudo-nitzschia and Eucampia were the most abundant this week. Pseudo-nitzschia were mostly seriata size and both P. australis and P. multiseries were detected. Alexandrium cell concentrations also increased (2 orders of magnitude).
Dinoflagellates:
C: Alexandrium
P: Protoperidinium
P: Ceratium
P: Prorocentrum
P: Dinophysis
R: Gymnodinium
R: Akashiwo
R: Heterocapsa
R: Noctiluca
R: Gyrodinium
R: Polykrikos
R: Amylax
R: Boreadinium
Diatoms:
C: Pseudo-nitzschia
C: Skeletonema
C: Thalassiosira
C: Eucampia
P: Guinardia
P: Thalassionema
R: Chaetoceros
R: Dactyliosolen
R: Pleurosigma
R: Asteromphalus
R: Ditylum
R: Asterionellopsis
R: Paralia
R: Rhizosolenia
R: Coscinodiscus
R: Licmophora
R: Odontella
R: Proboscia
R: Tropidoneis
Other:
R: Dictyocha
R: Heterosigma
* Environmental Information *
Time: 8:30 am
Collector: M. Conci
Water Conditions (SCW)
Water Temperature: 13.3 C
Water Conditions: Calm
Water Color/Code: Blue/green, 5BG 2/6 (#15)
Water Visibility: 7 ft
Tide: Rising, Low – 6:34, -0.6 ft
Surf Report: WNW swell, 4-5
NDBC buoy 46236
– Significant wave height: 2.0 m
– Swell height/direction: 1.1 m, WNW
– Wind wave height/direction: 1.7 m, WNW
Weather Conditions (KudelaHawk)
Sky: Overcast
Air Temperature: 52.2 F (11.2 C)
Wind: 2 mph, ESE
Solar radiation: 174 watts/m^2
Monterey Wharf II
Wednesday, May 14, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: Rare
– Dinophysis: Rare
– Margalefidinium: None
* Impressions *
The wharf this morning was cloudy and breezy. There were a couple sea lions swimming around the sampling site. The surface of the water was relatively calm. The water this week was more green than last week with a visibility of 4.0m. Chlorophyll increased from last week. Diatoms dominated the water column. Eucampia was abundant ( >= 50%). Pseudo-nitzschia was common (10 – 49%). Guinardia and Thalassionema 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. (grey green)
R: Lingulodinium polyedrum
R: Oxyphysis
R: Pyrophacus spp.
R: Amylax
Diatoms:
R: Chaetoceros spp.
R: Thalassiosira spp.
R: Coscinodiscus spp.
C: Pseudo-nitzschia spp.
R: Ditylum spp.
P: Guinardia spp.
R: Pleurosigma spp.
R: Rhizosolenia spp.
P: Thalassionema spp.
R: Skeletonema spp.
R: Hemiaulus spp.
R: Tropidoneis spp.
R: Lauderia spp.
R: Navicula spp.
R: Cylindrotheca spp.
R: Licmophora spp.
R: Odontella spp.
R: Asterionellopsis spp.
R: Proboscia spp.
A: Eucampia
R: Entomoneis
Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
R: Larvacean
R: Oligiotrich
* Environmental Information *
TIME: 0740 PT
COLLECTOR: Hannah McGrath
Water Temperature: 14.1°C
Water Conditions: relatively calm
Water Color: 5GY 2/2
Visibility: 4.0 m
Tide: Rising, -0.09 m, high at 1353 h
Sky: cloudy skies, 100% cloud
Air Temperature: 12.22°C
Wind: offline, 3.13 m/S
Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%