Santa Cruz Wharf
Wednesday, September 10, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Rare
– Alexandrium: None
– Dinophysis: Rare
– Margalefidinium: Rare
* Impressions *
Partly cloudy and warm-ish at the wharf this morning. Water color definitely had more ‘brown’ in it and phytoplankton biomass definitely increased this week. Net tow remains mostly dinoflagellates and Prorocentrum remains the most abundant. No P. australis or P. multiseries were detected, but delicatissima-size cells were observed. No Alexandrium were seen in the sample this week.
Dinoflagellates:
A: Prorocentrum
R: Ceratium
R: Dinophysis
R: Protoperidinium
R: Akashiwo
R: Margalefidinium
R: Polykrikos
R: Boreadinium
R: Oxyphysis
R: Gonyaulax
Diatoms:
R: Pseudo-nitzschia
R: Proboscia
R: Chaetoceros
R: Thalassiosira
R: Lauderia
R: Leptocylindrus
R: Thalassionema
R: Pleurosigma
R: Licmophora
R: Fragilariopsis
R: Entomoneis
Other:
R: Dictyocha
* Environmental Information *
Time: 8:15 am
Collector: A. Trapp
Water Conditions (SCW)
Water Temperature: 16.2 C
Water Conditions: Calm
Water Color/Code: Green/brown, 5Y 3/4 (#21)
Water Visibility: 4 ft
Tide: Rising, Low – 6:17, 1.1 ft
Surf Report: WNW swell, 3-4 ft
NDBC buoy 46236
– Significant wave height: 1.1 m
– Swell height/direction: 0.6 m, SW
– Wind wave height/direction: 0.9 m, W
Weather Conditions (KudelaHawk)
Sky: Partly cloudy
Air Temperature: 62.4 F (16.9 C)
Wind: 1 mph, NNE
Solar radiation: 161 watts/m^2
Monterey Wharf II
Wednesday, September 10, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: Present
– Dinophysis: Present
– Margalefidinium: None
* Impressions *
The weather at the wharf this morning was warm and mostly cloudy with no breeze, and the sun shone through a few times during the sampling period. The water surface was calm, and it was dark green in color with a visibility of about 5 m. Diatoms dominated the phytoplankton community today. Pseudo-nitzschia delicatissima, Pseudo-nitzschia seriata, and Chaetoceros were common (10 – 49%). Skeletonema, Prorocentrum, Protoperidinium, Dinophysis, and Ceratium were present (1 – 9%). The HAB species observed today included Pseudo-nitzschia, Alexandrium, and Dinophysis.
Dinoflagellates:
P: Prorocentrum spp.
P: Dinophysis spp.
P: Ceratium spp.
R: Gonyaulax spp.
P: Protoperidinium spp.
P: Alexandrium spp.
R: Scrippsiella spp.
R: Gyrodinium spp.
R: Polykrikos spp.
R: Boreadinium spp.
R: Oxyphysis
R: Pyrophacus spp.
R: Amylax
R: Unknown
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.
P: Skeletonema spp.
R: Hemiaulus spp.
R: Lauderia spp.
R: Navicula spp.
R: Odontella spp.
R: Leptocylindrus spp.
R: Asterionellopsis spp.
R: Proboscia spp.
R: Detonula spp.
R: Eucampia
R: Lioloma
Others:
R: Dictyocha spp.
R: Phaeocystis spp. (singletons and clumps)
Zooplankton:
R: Oligiotrich
* Environmental Information *
TIME: 0740 PT
COLLECTOR: Elise Tysdal
Water Temperature: 16.8°C
Water Conditions: calm
Water Color: 5Y 2/2
Visibility: 5 m
Tide: Rising, 0.44 m, high at 1245 h
Sky: mostly cloudy, 70% cloud
Air Temperature: 17.22°C
Wind: offline, 2.24m/S
Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%