(Table 1) 100 m integrated temperature, chlorophyll a content and protist biomass during Leg 7 of Galathea 3 cruise (2006) ...

• Main Author: Jónasdóttir, Sigrún Huld
• Format: Dataset
• Language: English
• Published: PANGAEA 2013
• Subjects: Event label; Latitude of event; Longitude of event; DATE/TIME; Depth, top/min; Depth, bottom/max; Temperature, water; Temperature, water, standard deviation; Chlorophyll a, areal concentration; Chlorophyll a, standard deviation; Protista, biomass as carbon; Standard deviation; Copepoda, biomass as carbon, integrated; Multiple investigations; Galathea 3; HDMS Vaedderen; International Polar Year 2007-2008 IPY; Indian; International Polar Year; IPY; Copepods
• Online Access: https://dx.doi.org/10.1594/pangaea.835227; https://doi.pangaea.de/10.1594/PANGAEA.835227

We present a study on the protozooplankton >5 µm and copepods larger than 50 µm 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 µm in size, dominated by nauplii, and smaller copepods, while 80% of the biomass (as mg C/m**3) was larger than 1300 µm in body length. Predation by the carnivorous copepod Corycaeus sp. was estimated to be able to remove up to 2% /d of the copepods <1000 µm 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 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) but typical for food limited ... : Heterotrophic protists include ciliates >5 µm and copepods. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...