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In marine systems where high nutrients lead to #hypoxia (low oxygen), it is commonly thought animals must avoid these zones - wrongly. Many types of #zooplankton seek refuge from predation in low oxygen layers in lakes and oceans. This is quite relevant to the #carbon pump off Peru because mesopelagic zooplankton, including Euphausiid #krill can graze on algae sinking in these zones, and produce rapidly sinking fecal pellets. #Climate
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https://www.nature.com/articles/s43247-023-01140-6
Hypoxia-tolerant zooplankton may reduce biological carbon pump efficiency in the Humboldt current system off Peru - Communications Earth & Environment
Grazing of sinking particles by hypoxia-tolerant zooplankton likely reduces biological carbon pump efficiency in the Oxygen Minimum Zone off Peru, suggest analysis of drifting sediment trap samples and in situ imaging observations.Nature
Coccolithophores (phylum Haptista) are a type of #phytoplankton covered in white calcium carbonate coccolith plates. Blooms in the surface seas can be seen in satellite images because these shells. They are the primary component in #chalk deposits such as the white cliffs of Dover (the "calcite belt" in the temperate north) and as such are very important for the biological carbon pump.
#climate
Emiliania huxleyi (below) is a common species.
https://joidesresolution.org/the-magical-world-of-coccolithophores/
The Magical World of Coccolithophores
What are these beautiful algae? Where are they found and why are they important? Teachers down load the word document at the end of the article with questions. These photographs show 4 coccolitho…JOIDES Resolution