Santa Cruz Wharf
Wednesday, April 16, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: None
– Dinophysis: Rare
– Margalefidinium: Rare
* Impressions *
Sunny and cool at the wharf this morning. Phytoplankton biomass increased again this week along with an increase in dinoflagellate abundance. Akashiwo and Pseudo-nitzschia (seriata size) were the most abundant in the net tow. P. australis concentrations increased from last week, with no P. multiseries detected. Alexandrium concentrations also increased this week
Dinoflagellates:
C: Akashiwo
R: Protoperidinium
R: Dinophysis
R: Ceratium
R: Prorocentrum
R: Gymnodinium
R: Noctiluca
R: Polykrikos
R: Margalefidinium
Diatoms:
C: Pseudo-nitzschia
C: Eucampia
C: Leptocylindrus
P: Chaetoceros
P: Guinardia
P: Thalassiosira
P: Detonula
P: Lauderia
P: Thalassionema
R: Skeletonema
R: Asterionellopsis
R: Pleurosigma
R: Asteromphalus
R: Ditylum
R: Rhizosolenia
R: Lithodesmium
R: Odontella
R: Thalassiothrix
R: Coscinodiscus
R: Tropidoneis
R: Entomoneis
Other:
R: Phaeocystis
* Environmental Information *
Time: 8:30 am
Collector: M. Conci
Water Conditions (SCW)
Water Temperature: 12.2 C
Water Conditions: Calm
Water Color/Code: Green, 10GY 3/4 (#29)
Water Visibility: 7 ft
Tide: Rising, Low – 7:32, -0.1 ft
Surf Report: NW swell, 4-6
NDBC buoy 46236
– Significant wave height: 1.3 m
– Swell height/direction: 0.9 m, WNW
– Wind wave height/direction: 1.0 m, WNW
Weather Conditions (KudelaHawk)
Sky: Sunny
Air Temperature: 50.9 F (10.5 C)
Wind: 2 mph, N
Solar radiation: 298 watts/m^2
Monterey Wharf II
Wednesday, April 16, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: None
– Dinophysis: Rare
– Margalefidinium: None
* Impressions *
The wharf this morning was breezy and partly cloudy. The surface of the water was smooth and calm. The water this week was less brown but more green than last week with increased visibility of 5.0m. Chlorophyll decreased from last week. .Akashiwo significantly decreased from last week. Diatoms dominated the water column. Skeletonema and Pseudo-nitzschia were common (10-49%). Eucampia, Chaetoceros, Thalassiosira, Guinardia, Detonula, and Akashiwo were present (1-9%). The HAB species that were observed in the water this morning included Pseudo-nitzschia, Dinophysis and Akashiwo sanguinea.
Dinoflagellates:
P: Akashiwo sanguinea
R: Dinophysis spp.
R: Ceratium spp.
R: Gonyaulax spinifera
R: Protoperidinium spp.
R: Gyrodinium spp. (pink tipped)
R: Polykrikos spp.
R: Pyrophacus spp.
R: Amylax
Diatoms:
P: Chaetoceros spp.
P: Thalassiosira spp.
R: Coscinodiscus spp.
C: Pseudo-nitzschia spp.
R: Ditylum spp.
P: Guinardia spp.
R: Pleurosigma spp.
R: Rhizosolenia spp.
R: Thalassionema spp.
C: Skeletonema spp.
R: Tropidoneis spp.
R: Lauderia spp.
R: Navicula spp.
R: Cylindrotheca spp.
R: Leptocylindrus spp.
R: Asterionellopsis spp.
P: Detonula spp.
P: Eucampia
R: Entomoneis
R: Lioloma
Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
* Environmental Information *
TIME: 0646 PT
COLLECTOR: Hannah McGrath
Water Temperature: 11.9°C
Water Conditions: smooth/calm surface
Water Color: 10Y 2/2
Visibility: 5.0 m
Tide: Falling, 0.0m, low at 0743 h
Sky: sunny/partly cloudy, 50% cloud
Air Temperature: 10.0°C
Wind: offline, 2.24 m/s
Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%