Santa Cruz Wharf
Wednesday, June 4, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Rare
– Alexandrium: Rare
– Dinophysis: Common
– Margalefidinium: None
* Impressions *
Another overcast and cool morning at the wharf. Net tow had a lot of detritus/debris this week. The phytoplankton biomass increased slightly from last week, but the assemblage remains an even mix of diatoms and dinoflagellates. Pseudo-nitszchia were ‘Rare’ this week and Thalassiosira and Ceratium were the most abundant. No P. australis or P. multiseries were detected in the probed counts and Alexandrium concentrations decreased dramatically from last week as well.
Dinoflagellates:
C: Ceratium
C: Dinophysis
C: Protoperidinium
P: Prorocentrum
R: Gymnodinium
R: Akashiwo
R: Alexandrium
R: Gonyaulax
R: Oxyphysis
R: Scrippsiella
R: Pyrocystis
R: Polykrikos
R: Boreadinium
R: LRB
Diatoms:
C: Thalassiosira
P: Chaetoceros
P: Coscinodiscus
R: Pseudo-nitzschia
R: Skeletonema
R: Eucampia
R: Guinardia
R: Lauderia
R: Thalassionema
R: Pleurosigma
R: Asteromphalus
R: Ditylum
R: Asterionellopsis
R: Paralia
R: Rhizosolenia
R: Tropidoneis
R: Odontella
Other:
R: Phaeocystis
R: Cluster-flagellate
* Environmental Information *
Time: 8:20 am
Collector: A. Trapp
Water Conditions (SCW)
Water Temperature: 13.5 C
Water Conditions: Small swell
Water Color/Code: Green, 5GY 3/4 (#28)
Water Visibility: 4 ft
Tide: Falling, High – 6:09, 3.2 ft
Surf Report: NW swell, 4-5
NDBC buoy 46236
– Significant wave height: 1.3 m
– Swell height/direction: 0.9 m, W
– Wind wave height/direction: 1.0 m, WNW
Weather Conditions (KudelaHawk)
Sky: Overcast
Air Temperature: 54.3 F (12.4 C)
Wind: 1 mph, W
Solar radiation: 130 watts/m^2
Monterey Wharf II
Wednesday, June 4, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Present
– Alexandrium: Rare
– Dinophysis: Rare
– Margalefidinium: None
* Impressions *
The wharf this morning was cloudy with a slight breeze. In the distance there was fog. The surface of the water had no detritus and was relatively calm. The water this week was more blue than last week with a visibility greater than 5.0 m. Visually chlorophyll significantly decreased from last week. Diatoms dominated the water column. Skeletonema were abundant (>=50%). Chaetoceros was common in the water (10-49%). Thalassiosira, Ditylum, and Pseudo-nitzschia delicatissima were present (1-9%). The HAB species that were observed in the water this morning included Pseudo-nitzschia, Alexandrium, and Dinophysis.
Dinoflagellates:
R: Prorocentrum spp.
R: Dinophysis spp.
R: Ceratium spp.
R: Gonyaulax spinifera
R: Protoperidinium spp.
R: Alexandrium spp.
R: Gyrodinium spp.
R: Pyrocystis lunula
R: Pyrophacus spp.
R: Heterocapsa spp.
R: Amylax
Diatoms:
C: Chaetoceros spp.
P: Thalassiosira spp.
R: Coscinodiscus spp.
P: Ditylum spp.
R: Guinardia spp.
R: Pleurosigma spp.
R: Thalassionema spp.
A: Skeletonema spp.
R: Tropidoneis spp.
R: Lauderia spp.
R: Navicula spp.
R: Cylindrotheca spp.
R: Licmophora spp.
R: Odontella spp.
R: Leptocylindrus spp.
R: Asterionellopsis spp.
R: Cerataulina spp.
R: Eucampia
R: Grammatophora
R: Closterium
Zooplankton:
R: Oligotrich
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
* Environmental Information *
TIME: 0726 PT
COLLECTOR: Hannah McGrath
Water Temperature: 15.0°C
Water Conditions: calm
Water Color: 5BG 2/6
Visibility: >5.0 m
Tide: Falling, 1.01 m, low at 1220 h
Sky: cloudy, 100% cloud
Air Temperature: 12.78°C
Wind: offline, 0.89 m/S
Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%