Santa Cruz Wharf
Wednesday, May 24, 2023
* Quick HAB Observations *
– Pseudo-nitzschia: Rare
– Alexandrium: Common
– Dinophysis: Present
– Margalefidinium: None
* Impressions *
Another cool morning with the marine layer decidedly present at the wharf. Zooplankton are rarely mentioned in this report, but Tiarina were the most abundant plankton in the net tow this week. The number of zooplankton coupled with the dramatic decrease in phytoplankton biomass made the assemblage a more difficult one to assess. The phytoplankton assemblage shifted to mostly dinoflagellates this week led by Protoperidinium (several species). There were no Pseudo-nitzschia cells observed in the probed counts this week and the Alexandrium cell concentration increased 2 orders of magnitude. Single cells of Alex and chains of up to 8 cells were zooming around the petri dish.
Dinoflagellates:
A: Protoperidinium
C: Alexandrium
C: Boreadinium
P: Dinophysis
P: Gymnodinium
R: Ceratium
R: Polykrikos
R: Amylax
R: Gyrodinium
Diatoms:
P: Skeletonema
P: Thalassiosira
R: Eucampia
R: Navicula
R: Pseudo-nitzschia
R: Chaetoceros
R: Guinardia
R: Lauderia
R: Coscinodiscus
R: Ditylum
R: Asteromphalus
R: Pleurosigma
R: Paralia
R: Cylindrotheca
Other:
A: Zooplankton (mostly Tiarina)
R: Dictyocha
* Environmental Information *
Time: 8:30 am
Collector: M. Conci
Water Conditions (SCW)
Water Temperature: 13.0 C
Water Conditions: Calm
Water Color/Code: Green, 10G 2/6 (#12)
Water Visibility: 5 ft
Tide: Falling, Low – 9:10, -0.3 ft
Surf Report: NW swell, 3-4 ft
NDBC buoy 46042
– Significant wave height: 7.2 ft
– Swell height/direction: 6.9 ft, WNW
– Wind wave height/direction: 1.3 ft, WNW
Weather Conditions (KudelaHawk)
Sky: Foggy/marine layer
Air Temperature: 52.7 F (11.5 C)
Wind: 3 mph, S
Solar radiation: 95 watts/m^2
Monterey Wharf II
Wednesday, May 24, 2023
* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: Rare
– Dinophysis: Rare
– Margalefidinium: None
* Impressions *
This morning it was misting and the sky was filled with clouds. The mountains in the horizon were not visible. There was a slight breeze but the surface water was relatively calm. Several boats were docked at my site. The water this week was bluer than last week with a visibility of 4.75m. Chlorophyll significantly decreased from last week. Both Pseudo-nitzschia and Protoperidinium were common. Chaetoceros, Gyrodinium (pink tipped), and Gonyaulax were present. The HAB species that were observed in the water this morning included Pseudo-nitzschia, Alexandrium, and Dinophysis.
Dinoflagellates:
R: Prorocentrum spp.
R: Dinophysis spp.
R: Ceratium spp.
P: Gonyaulax spinifera
C: Protoperidinium spp.
R: Alexandrium spp.
R: Scrippsiella spp.
P: Gyrodinium spp. (pink tipped)
R: Polykrikos spp.
R: Lingulodinium polyedrum
R: Pyrophacus spp.
R: Amylax
Diatoms:
P: Chaetoceros spp.
R: Thalassiosira spp.
R: Coscinodiscus spp.
C: Pseudo-nitzschia spp.
R: Ditylum spp.
R: Guinardia spp.
R: Pleurosigma spp.
R: Thalassionema spp.
R: Tropidoneis spp.
R: Lauderia spp.
R: Navicula spp.
R: Cylindrotheca spp.
R: Bacillaria spp.
R: Licmophora spp.
R: Odontella spp.
R: Asteromphalus spp.
R: Leptocylindrus spp.
R: Proboscia spp.
R: Detonula spp.
R: Eucampia
Others:
R: Dictyocha spp.
Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
* Environmental Information *
TIME: 0728 PT
COLLECTOR: Hannah McGrath
Water Temperature: 12.50°C
Water Conditions: Calm
Water Color: 5G 2/6
Visibility: 4.75m
Tide: Falling, 0.21m, low at 0910 h
Chlorophyll: 7.569mg/m^3 by in vivo RFU
Sky: cloudy/misting, 100% cloud
Air Temperature: 12.22°C
Wind: NA, 3.80m/S
Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%