Santa Cruz Wharf
Wednesday, June 18, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Rare
– Alexandrium: Rare
– Dinophysis: Rare
– Margalefidinium: Rare
* Impressions *
Another sunny morning at the wharf this week with a bait ball moving in and out of the sampling area. The phytoplankton assemblages shifted to mostly dinoflagellates this week and Akashiwo was the most abundant. Phytoplankton diversity was high this week as well. Pseudo-nitzschia were both seriata and delicatissima size and no P. australis or P. multiseries were detected in the probed counts. Alexandrium concentrations were similar to last week.
Dinoflagellates:
A: Akashiwo
P: Ceratium
P: Protoperidinium
R: Prorocentrum
R: Dinophysis
R: Alexandrium
R: Gonyaulax
R: Oxyphysis
R: Scrippsiella
R: Polykrikos
R: Boreadinium
R: Margalefidinium
R: Fragilidium?
Diatoms:
C: Chaetoceros
P: Guinardia
R: Pseudo-nitzschia
R: Thalassiosira
R: Skeletonema
R: Eucampia
R: Coscinodiscus
R: Lauderia
R: Leptocylindrus
R: Licmophora
R: Ditylum
R: Stephanopyxis
R: Rhizosolenia
R: Navicula
R: Odontella
Other:
R: Phaeocystis
* Environmental Information *
Time: 10:50 am
Collector: K. Negrey
Water Conditions (SCW)
Water Temperature: 15.3 C
Water Conditions: Calm
Water Color/Code: Green/brown, 5GY 3/4 (#28)
Water Visibility: 5 ft
Tide: Low – 10:20, 0.4 ft
Surf Report: NW swell, 2-3
NDBC buoy 46236
– Significant wave height: 1.2 m
– Swell height/direction: 0.3 m, SW
– Wind wave height/direction: 1.2 m, WNW
Weather Conditions (KudelaHawk)
Sky: Sunny
Air Temperature: 59.5 F (15.3 C)
Wind: 2 mph, ESE
Solar radiation: 776 watts/m^2
Monterey Wharf II
Wednesday, June 18, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Rare
– Alexandrium: Rare
– Dinophysis: Rare
– Margalefidinium: Rare
* Impressions *
The wharf this morning was cloudy and breezy. The surface of the water was relatively calm. The water this week was more green than two weeks ago with a visibility of 3.5m. Chlorophyll increased from two weeks ago. Diatoms dominated the water column. Chaetoceros was abundant (>=50%) in the water. Guinardia, Eucampia, Akashiwo, Prorocentrum, and Oligiotrich 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:
P: Akashiwo sanguinea
P: Prorocentrum spp.
R: Dinophysis spp.
R: Ceratium spp.
R: Gonyaulax spinifera
R: Protoperidinium spp.
R: Alexandrium spp.
R: Scrippsiella spp.
R: Gyrodinium spp. (pink tipped)
R: Polykrikos spp.
R: Cochlodinium spp.
R: Oxyphysis
R: Pyrophacus spp.
Diatoms:
A: Chaetoceros spp.
R: Thalassiosira spp.
R: Coscinodiscus spp.
R: Pseudo-nitzschia spp.
R: Ditylum spp.
P: Guinardia spp.
R: Pleurosigma spp.
R: Rhizosolenia spp.
R: Thalassionema spp.
R: Skeletonema spp.
R: Lauderia spp.
R: Navicula spp.
R: Cylindrotheca spp.
R: Licmophora spp.
R: Leptocylindrus spp.
R: Asterionellopsis spp.
R: Stephanopyxis spp.
R: Dactyliosolen spp.
R: Proboscia spp.
R: Detonula spp.
R: Paralaria spp.
P: Eucampia
Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
R: Oligiotrich
* Environmental Information *
TIME: 0652 PT
COLLECTOR: Hannah McGrath
Water Temperature: 13.5°C
Water Conditions: relatively calm
Water Color: 10Y 2/2
Visibility: 3.5 m
Tide: Falling, 0.70m, low at 1031 h
Sky: cloudy, 100% cloud
Air Temperature: 12.0°C
Wind: offline, 3.13 m/S
Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%