Santa Cruz Wharf
Wednesday, August 9, 2023
* Quick HAB Observations *
– Pseudo-nitzschia: None
– Alexandrium: None
– Dinophysis: Rare
– Margalefidinium: Common
* Impressions *
Another cool morning with a marine layer out at the wharf. While the surface was relatively calm, the under current pulled my gear towards the piling. After weeks of Eucampia dominating the net tow, the phytoplankton assemblage has shifted. Dinoflagellate abundance increased, but diatoms remain the most abundant. Thalassiosira (beefy cells) and Skeletonema were the most abundant this week. No Pseudo-nitzschia were observed this week and Alexandrium counts were similar to last week.
Dinoflagellates:
C: Margalefidinium
P: Oxyphysis
P: Akashiwo
R: Ceratium
R: LRB
R: Protoperidinium
R: Prorocentrum
R: Dinophysis
R: Gymnodinium
R: Polykrikos
R: Gyrodinium
Diatoms:
C: Thalassiosira
C: Skeletonema
P: Eucampia
P: Detonula
P: Chaetoceros
P: Lauderia
R: Guinardia
R: Coscinodiscus
R: Odontella
R: Ditylum
R: Paralia
R: Pleurosigma
R: Navicula
R: Asteromphalus
R: Actinoptychus
R: Asterionellopsis
R: Tropidoneis
* Environmental Information *
Time: 9:00 am
Collector: K. Negrey
Water Conditions (SCW)
Water Temperature: 15.2 C
Water Conditions: Calm surface w/under current
Water Color/Code: Blue green, 5G 2/6 (#31)
Water Visibility: 7 ft
Tide: Falling, High – 6:57, 3.1 ft
Surf Report: WNW swell, 2-3 ft
NDBC buoy 46042
– Significant wave height: 3.6 ft
– Swell height/direction: 3.6 ft, WNW
– Wind wave height/direction: 0.7 ft, W
Weather Conditions (KudelaHawk)
Sky: Marine layer
Air Temperature: 57.2 F (14.0 C)
Wind: 5 mph, ENE
Solar radiation: 220 watts/m^2
Monterey Wharf II
Wednesday, August 9, 2023
* Quick HAB Observations *
– Pseudo-nitzschia: Rare
– Alexandrium: None
– Dinophysis: Rare
– Margalefidinium: Rare
* Impressions *
The wharf was cloudy and the surface water was relatively calm. There were several boats docked at my site. The water this week was a slightly darker green than last week with a visibility of 4.5m. Chlorophyll decreased from last week. Diatoms dominated the water column. Eucampia, Chaetoceros, Detonula, and Lauderia were common in the water. Meanwhile Thalassiosira was present. The HAB species that observed in the water this morning included Pseudo nitzschia, Dinophysis, Cochlodinium, and Akashiwo sanguinea.
Dinoflagellates:
R: Akashiwo sanguinea
R: Prorocentrum spp.
R: Dinophysis spp.
R: Ceratium spp.
R: Gonyaulax spinifera
R: Protoperidinium spp.
R: Gyrodinium spp. (pink tipped)
R: Cochlodinium spp.
R: Gymnodinium spp
R: Oxyphysis
R: Pyrophacus spp.
R: Amylax
Diatoms:
C: Chaetoceros spp.
P: Thalassiosira spp.
R: Coscinodiscus spp.
R: Pseudo-nitzschia spp.
R: Ditylum spp.
R: Guinardia spp.
R: Pleurosigma spp.
R: Thalassionema spp.
R: Skeletonema spp.
R: Tropidoneis spp.
C: Lauderia spp.
R: Navicula spp.
R: Cylindrotheca spp.
R: Asteromphalus spp.
R: Asterionellopsis spp.
C: Detonula spp.
C: Eucampia
R: Entomoneis
Others:
R: sponge spicule
Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
* Environmental Information *
TIME: 0717 PT
COLLECTOR: Hannah McGrath
Water Temperature: 14.9°C
Water Conditions: Calm
Water Color: 5GY 2/2
Visibility: 4.5 m
Tide: Falling, 1.01m, low at 1109 h
Chlorophyll: net: 8.010mg/m^3 by in vivo RFU
Sky: cloudy, 100% cloud
Air Temperature: 15.0°C
Wind: offline
Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%