Santa Cruz Wharf
Wednesday, March 19, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Present
– Alexandrium: None
– Dinophysis: Rare
– Margalefidinium: Rare
* Impressions *
Mostly sunny and cold at the wharf this morning. Net tow was mostly diatoms and phytoplankton biomass decreased this week. Phytoplankton assemblage shifted slightly with Chaetoceros decreasing and Skeletonema being the most abundant. No Alexandrium were observed this week. Pseudo-nitzschia were mostly seriata size (handful of deli-size). P. australis and P. multiseries were detected in the probed counts this week and concentrations increased 2 orders of magnitude.
Dinoflagellates:
R: Ceratium
R: Protoperidinium
R: Dinophysis
R: Prorocentrum
R: Gyrodinium
R: Margalefidinium
R: Polykrikos
Diatoms:
A: Skeletonema
C: Chaetoceros
P: Thalassiosira
P: Asterionellopsis
P: Pseudo-nitzschia
R: Detonula
R: Lauderia
R: Coscinodiscus
R: Pleurosigma
R: Proboscia
R: Asteromphalus
R: Eucampia
R: Guinardia
R: Dactyliosolen
R: Paralia
R: Thalassionema
R: Ditylum
R: Rhizosolenia
R: Actinoptychus
R: Entomoneis
* Environmental Information *
Time: 8:15 am
Collector: P. Daniel
Water Conditions (SCW)
Water Temperature: 12.0 C
Water Conditions: Small swell
Water Color/Code: Green, 10G 2/6 (#12)
Water Visibility: 5 ft
Tide: Falling, Low – 8:51, 0.6 ft
Surf Report: WNW swell, 3-4
NDBC buoy 46236
– Significant wave height: 2.2 m
– Swell height/direction: 1.8 m, WNW
– Wind wave height/direction: 1.4 m, WNW
Weather Conditions (KudelaHawk)
Sky: Partly cloudy
Air Temperature: 42.3 F (5.7 C)
Wind: 8 mph, W
Solar radiation: 132 watts/m^2
Monterey Wharf II
Wednesday, March 19, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: Rare
– Dinophysis: Rare
– Margalefidinium: None
* Impressions *
The wharf this morning was sunny with clear skies. The wharf was relatively warm and there was no breeze. There were several fishermen at the wharf. The water this week was a slightly lighter green than last week with a visibility of 5.5m. Visually chlorophyll decreased slightly from last week. Diatoms dominated the water column. Chaetoceros, Pseudo-nitzschia, and Skeletonema were common (10-49%). Proboscia and Akashiwo were present (1-10%). The HAB species that were observed in the water this morning included Pseudo-nitzschia, Alexandrium, Dinophysis and Akashiwo sanguinea.
Dinoflagellates:
P: Akashiwo sanguinea
R: Prorocentrum spp.
R: Dinophysis spp.
R: Ceratium spp.
R: Protoperidinium spp.
R: Alexandrium spp.
R: Gyrodinium spp.
R: Lingulodinium polyedrum
R: Amylax
Diatoms:
C: Chaetoceros spp.
R: Thalassiosira spp.
R: Coscinodiscus spp.
C: Pseudo-nitzschia spp.
R: Ditylum spp.
R: Guinardia spp.
R: Pleurosigma spp.
R: Rhizosolenia spp.
R: Thalassionema spp.
C: Skeletonema spp.
R: Lauderia spp.
R: Navicula spp.
R: Cylindrotheca spp.
R: Licmophora spp.
R: Odontella spp.
R: Leptocylindrus spp.
R: Asterionellopsis spp.
R: Stephanopyxis spp.
R: Cerataulina spp.
R: Proboscia spp.
R: Detonula spp.
R: Eucampia
R: Entomoneis
R: Lioloma
R: Grammatophora
Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
* Environmental Information *
TIME: 0832 PT
COLLECTOR: Hannah McGrath
Water Temperature: 12.1°C
Water Conditions: calm
Water Color: 5Y 2/2
Visibility: 5.5 m
Tide: Falling, 0.21 m, low at 0902 h
Sky: sunny/ clear skies, 5% cloud
Air Temperature: 8.06°C
Wind: offline, 1.34m/S
Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%