Aquatic Sciences Meeting, Albuquerque 2001
| SS24 The Ecology of Pelagic Gelatinous Zooplankton |
| Date: Monday, February 12, 2001, Time: 11:15:00 AM |
| Location: Acoma/Zuni/Tesuque |
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| Maar, M, , The National Environmental Research Institute/University of Aarhus, Roskilde, Denmark, mam@dmu.dk |
| Gooding, S, , The National Environmental Research Institute, Roskilde, Denmark, sgo@dmu.dk |
| Nielsen, T, G, The National Environmental Research Institute, Roskilde, Denmark, tgn@dmu.dk |
| Tönnesson, K, , Kristineberg Marine Research Station, Fiskebäckskil, Sweden, k.tonnesson@kmf.gu.se |
| Zervoudaki, T, , The National Center of Marine Research, Athens, Greece, Tanya@fl.ncmr.gr |
| Tiselius, P, , Kristineberg Marine Research Station, Fiskebäckskil, Sweden, p.tiselius@kmf.gu.se |
| Sell, A, , Kristineberg Marine Research Station, Fiskebäckskil, Sweden, a.sell@kmf.gu.se |
| Christou, E, , The National Center of Marine Research, Athens, Greece, edc@fl.ncmr.gr |
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| The role of the appendicularians versus copepods in grazing and vertical flux in the Skagerrak during summer |
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| The study was carried out in Skagerrak, August 2000, between Denmark and Norway. The aim of the project is to describe the vertical flux of carbon, nutrients and trace substances in the system. Skagerrak is characterised by a dome shaped pycnocline with occurrence of subsurface blooms during summer. The fate of primary production depends on the heterotrophic activities. Appendicularians mainly filtrate picoplankton through a mucus house, which they shed around 5 times a day. Copepods, on the other hand, prefer plankton >10 µm. Mesozooplankton grazing was estimated in grazing experiments as well as from egg and fecal pellet production and gut clearance rate of the dominant copepods and appendicularians. Sediment traps were deployed along the transect at two arrays to estimate the vertical flux of pigments, zooplankton fecal pellets and mucus houses. Based on the measurements, a carbon budget for the euphotic zone was established. The budget showed that appendicularians are very important for the sedimentation of biogenic carbon.
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