Algeblomstring

Midlertidige og særligt høje forekomster af planteplankton og zooplankton i hav og hav. Vi siger algeblomstring, men strengt taget er det ikke kun alger, der kan gøre denne blomstring (for eksempel nogle bakterier også).

Algeblomstringen opstår, når sollys og næringsstoffer er tilgængelige for planktonet, som vokser og formerer sig så tæt, at de “farvelægger” vandet, mest typisk forskellige nuancer af grønt. Blomstringen kan vare i få dage, eller den kan vare i flere uger. De kan forekomme i et lille område eller dække hundredvis af kvadratkilometer havoverflade.

Foto: Algeblomeration i Barentshavet (kilde: NASA)

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