Biological oceanography across the Southern Indian Ocean - basin scale trends in the zooplankton community

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Jonasdottir, Sigrun Huld (författare)

Nielsen, Torkel Gissel (författare)

Borg, Christian Marc Andersen (författare): Stockholms universitet,Institutionen för systemekologi

Moller, Eva Friis (författare)

Jakobsen, Hans Henrik (författare)

Satapoomin, Suree (författare)

(creator_code:org_t)

Elsevier BV, 2013
2013
Engelska.
Ingår i: Deep Sea Research Part I. - : Elsevier BV. - 0967-0637 .- 1879-0119. ; 75, s. 16-27

Relaterad länk:: https://urn.kb.se/re...; visa fler...; https://doi.org/10.1...; visa färre...

Abstract Ämnesord

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We present a study on the protozooplankton > 5 mu m and copepods larger than 50 mu m at a series of contrasting stations across the Southern Indian Ocean (SIO). Numerically, over 80% of the copepod community across the transect was less than 650 mu m in size, dominated by nauplii, and smaller copepods, while 80% of the biomass (as mg C m(-3)) was larger than 1300 mu m in body length. Predation by the carnivorous copepod Corycaeus sp. was estimated to be able to remove up to 2% d(-1) of the copepods < 1000 mu m in size. By the help of grazing models we estimated that primary producers were mainly grazed upon by ciliates and heterotrophic dinoflagellates (40-80% d(-1) combined) in temperate waters but appendicularians became increasingly important in the tropical waters grazing about 40% of the biomass per day. Despite their high abundance and biomass, copepods contributed less than 20% of the grazing at most stations. Secondary production was low (carbon specific egg production < 0.14 d(-1)) but typical for food limited oligotrophic oceans.

Av författaren/redakt...: Jonasdottir, Sig ...; Nielsen, Torkel ...; Borg, Christian ...; Moller, Eva Frii ...; Jakobsen, Hans H ...; Satapoomin, Sure ...

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