Santa Cruz Wharf
Wednesday, July 2, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: Rare
– Dinophysis: Common
– Margalefidinium: None
* Impressions *
Another overcast and cool morning at the wharf. Net tow was mostly dinoflagellates and Akashiwo were the most abundant again this week. Phytoplankton diversity remains high. Pseudo-nitzsschia were seriata and delicatissima size. No P. australis were seen in the probed counts and P. multiseries concentration decreased. Alexandrium concentration decreased this week as well.
Dinoflagellates:
C: Akashiwo
C: Dinophysis
P: Protoperidinium
R: Prorocentrum
R: Ceratium
R: Alexandrium
R: Gymnodinium
R: Polykrikos
R: Pyrocystis
Diatoms:
C: Pseudo-nitzschia
P: Chaetoceros
P: Detonula
R: Guinardia
R: Thalassiosira
R: Skeletonema
R: Eucampia
R: Coscinodiscus
R: Licmophora
R: Ditylum
R: Actinoptychus
R: Thalassionema
R: Pleurosigma
R: Asteromphalus
R: Stephanopyxis
R: Rhizosolenia
R: Paralia
R: Dactyliosolen
R: Odontella
R: Fragilariopsis
R: Tropidoneis
* Environmental Information *
Time: 8:45 am
Collector: M. Conci
Water Conditions (SCW)
Water Temperature: 13.1 C
Water Conditions: Calm
Water Color/Code: Dark green, 10GY 3/4 (#29)
Water Visibility: 8 ft
Tide: Falling, Low – 10:16, 1.2 ft
Surf Report: NW swell, 2-3
NDBC buoy 46236
– Significant wave height: 1.2 m
– Swell height/direction: 0.3 m, WNW
– Wind wave height/direction: 1.1 m, WNW
Weather Conditions (KudelaHawk)
Sky: Overcast/marine layer
Air Temperature: 53.4 F (11.9 C)
Wind: 2 mph, N
Solar radiation: 185 watts/m^2
Monterey Wharf II
Wednesday, July 2, 205
* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: Rare
– Dinophysis: Rare
– Margalefidinium: Rare
* Impressions *
The wharf this morning was drizzling/misting with a breeze. Smells of dried out seaweed. The water was more green than last week with a visibility of 3.0m. During sampling there were many seabirds flying offshore. Visually, chlorophyll increased from last week. Diatoms dominated the water column. Thalassionema and Pseudo-nitzschia were common. Thalassiosira, Navicula, Chaetoceros, Akashiwo, Prorocentrum, and Protoperidinium were present. 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
P: Protoperidinium spp.
R: Alexandrium spp.
R: Gyrodinium spp. (pink tipped)
R: Polykrikos spp.
R: Cochlodinium spp.
R: Lingulodinium polyedrum
R: Oxyphysis
R: Pyrophacus spp.
R: Amylax
Diatoms:
P: Chaetoceros spp.
P: Thalassiosira spp.
R: Coscinodiscus spp.
C: Pseudo-nitzschia spp.
R: Ditylum spp.
R: Guinardia spp.
R: Pleurosigma spp.
R: Rhizosolenia spp.
C: Thalassionema spp.
R: Skeletonema spp.
R: Tropidoneis spp.
R: Lauderia spp.
P: Navicula spp.
R: Cylindrotheca spp.
R: Licmophora spp.
R: Leptocylindrus spp.
R: Asterionellopsis spp.
R: Stephanopyxis spp.
R: Detonula spp.
R: Eucampia
Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
R: Oligiotrich
* Environmental Information *
TIME: 0732 PT
COLLECTOR: Hannah McGrath
Water Temperature: 14.0°C
Water Conditions: relatively calm
Water Color: 10Y 2/2
Visibility: 3.0 m
Tide: Falling, 0.70m, low at 1027 h
Sky: cloudy/misting/drizzling, 100% cloud
Air Temperature: 12.22°C
Wind: offline, 3.35m/S
Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%