Santa Cruz Wharf
Wednesday, May 7, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Rare
– Alexandrium: Rare
– Dinophysis: None
– Margalefidinium: None
* Impressions *
Overcast and cool at the wharf this morning. Phytoplankton biomass decreased this week, but the net tow looked very similar to last week. Assemblage was mostly diatoms and mostly Skeletonema. A few Pseudo-nitzschia chains (seriata size) were seen in the net tow, but no P. australis or P. multiseries were detected in the probed counts. Alexandrium concentration was similar to last week.
Dinoflagellates:
R: Protoperidinium
R: Akashiwo
R: Alexandrium
R: Ceratium
R: Prorocentrum
R: Gymnodinium
Diatoms:
A: Skeletonema
C: Thalassiosira
P: Eucampia
P: Thalassionema
R: Guinardia
R: Chaetoceros
R: Detonula
R: Lauderia
R: Pseudo-nitzschia
R: Pleurosigma
R: Asteromphalus
R: Ditylum
R: Asterionellopsis
R: Paralia
R: Rhizosolenia
R: Coscinodiscus
R: Leptocylindrus
R: Odontella
R: Nitzschia
R: Tropidoneis
Other:
R: Dictyocha
* Environmental Information *
Time: 8:45 am
Collector: A. Trapp
Water Conditions (SCW)
Water Temperature: 13.6 C
Water Conditions: Calm
Water Color/Code: Green, 10GY 2/4 (#30)
Water Visibility: 6 ft
Tide: Falling, High – 7:48, 3.5 ft
Surf Report: WNW swell, 3-5
NDBC buoy 46236
– Significant wave height: 1.1 m
– Swell height/direction: 0.5 m, WNW
– Wind wave height/direction: 1.1 m, WNW
Weather Conditions (KudelaHawk)
Sky: Overcast
Air Temperature: 55.4 F (13.0 C)
Wind: 2 mph, SE
Solar radiation: 90 watts/m^2
Monterey Wharf II
Wednesday, May 7, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Rare
– Alexandrium: Rare
– Dinophysis: Rare
– Margalefidinium: Rare
* Impressions *
The wharf this morning was cloudy. There was no breeze and the surface of the water was glassy. The water this week was more blue than last week with a visibility of 4.0m. Chlorophyll decreased from last week. Diatoms dominated the water column. Guinardia and Eucampia were common (10-49%). Thalassionema, Ceratium, and Prorocentrum 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:
R: Akashiwo sanguinea
P: Prorocentrum spp.
R: Dinophysis spp.
P: Ceratium spp.
R: Protoperidinium spp.
R: Alexandrium spp.
R: Scrippsiella spp.
R: Gyrodinium spp. (pink tipped)
R: Cochlodinium spp.
R: Oxyphysis
R: Pyrophacus spp.
R: Amylax
Diatoms:
R: Chaetoceros spp.
R: Thalassiosira spp.
R: Coscinodiscus spp.
R: Pseudo-nitzschia spp.
C: Guinardia spp.
R: Rhizosolenia spp.
P: Thalassionema spp.
R: Skeletonema spp.
R: Tropidoneis spp.
R: Lauderia spp.
R: Cylindrotheca spp.
R: Odontella spp.
R: Asterionellopsis spp.
R: Dactyliosolen spp.
R: Detonula spp.
C: Eucampia
Others:
R: Dictyocha spp.
R: Phaeocystis
Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
R: Oligiotrich
* Environmental Information *
TIME: 0732 PT
COLLECTOR: Hannah McGrath
Water Temperature: 14.1°C
Water Conditions: calm and glassy
Water Color: 5G 2/6
Visibility: 4.0 m
Tide: Rising, 1.10m, high at 0754h
Sky: cloudy, 100% cloud
Air Temperature: 12.5°C
Wind: offline, 0.89m/S
Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%