Photo: Peeter Laurits

Photo: Signe Lidén “The water samples I have collected from the pond in coastal rocks in a high tidal/ spray zone reveal the presence of microalgae that contain reddish pigment colouring water as a cause of their bloom and high density. Such behaviour is recognizable in many places and is interesting from the local/global perspective. It is directing me towards the “red tide” notion, colloquially used as a term for “harmful algal bloom” (HABs) in narration, evoking fear towards these beings. HABs are caused by certain species containing pigments that vary in colour from green to brown to red. Sometimes there is no colour indication. Of the 5000+ species of marine phytoplankton that exist worldwide, about 2% are known to be harmful or toxic. .3 Additionally, red tides are not typically associated with the tidal movement of water. I see this as a starting point for my narration. The phenomenon of red tide has been observed since ancient times. It has also currently a stigma status. ” Microscopic images by Izabela Zolcinska the_red_tide_slettnes_2022.pdf

Photo: Signe Lidén

Underwater recordings from the different tidal pools. All recordings is mixed into one file. The first part of the recording is from one deep pool (ca 1 m) with one hydrophone, first at high tide, later at low tide.

Signe lead a workshop in making hydrophones with shell+sea urchin-housing.

TIDAL CALENDAR SLETTNES FYR

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