Till sidans topp

Sidansvarig: Webbredaktion
Sidan uppdaterades: 2012-09-11 15:12

Tipsa en vän
Utskriftsversion

Sedimentation following t… - Göteborgs universitet Till startsida
Webbkarta
Till innehåll Läs mer om hur kakor används på gu.se

Sedimentation following the spring bloom in Disko Bay, West Greenland, with special emphasis on the role of copepods

Artikel i vetenskaplig tidskrift
Författare T. Juul-Pedersen
T. G. Nielsen
C. Michel
E. F. Moller
Peter Tiselius
Peter Thor
M. Olesen
Erik Selander
S. Gooding
Publicerad i Marine Ecology-Progress Series
Volym 314
Sidor 239-255
ISSN 0171-8630
Publiceringsår 2006
Publicerad vid Institutionen för marin ekologi
Sidor 239-255
Språk en
Länkar dx.doi.org/10.3354/meps314239
Ämnesord arctic marine ecology, sedimentation, faecal pellet production, Calanus, spp., carbon flux, NORTHEAST WATER POLYNYA, MARGINAL ICE-ZONE, PLANKTON COMMUNITY, STRUCTURE, ZOOPLANKTON FECAL PELLETS, CENTRAL BARENTS SEA, CALANUS-FINMARCHICUS, VERTICAL FLUX, SEASONAL-VARIATION, BIOGENIC, MATTER, FEEDING HISTORY
Ämneskategorier Ekologi

Sammanfattning

The sedimentation of particulate organic material was investigated in Disko Bay, West Greenland, during June 2001. Post spring-bloom conditions were encountered, with seasonally decreasing phytoplankton biomass associated with the pycnocline. Calanus finmarchicus, C. glacialis, and C. hyperboreus dominated the zooplankton community, comprising up to 88% of the copepod biomass. Faecal pellet production by C. finmarchicus and C. glacialis was positively correlated to the available food (chlorophyll a > 10 mu m). Results from short-term sediment trap deployments (6 h) showed that particulate organic carbon (POC) sedimentation from the euphotic zone was, on average, 628 mg C m(-2) d(-1), with copepod faecal pellets contributing, on average, 29% of this amount. The faecal pellet contribution to the vertical sinking export of POC was equivalent to that of phytoplankton and amorphous detritus. Yet, on average, 35% of the copepod faecal pellet production was retained within the euphotic zone. The POC: PON (particulate organic nitrogen) ratio of the suspended material in the euphotic zone (8.1 +/- 0.4) was comparable to that of the material collected in the sediment traps just below the euphotic zone (8.0 +/- 0.9). In addition, the daily loss rates of POC and PON within each sampling depth were similar, and the carbon to nitrogen ratio in the sediment traps did not change with depth. These results indicate that the pelagic system had a low retention efficiency of nitrogen just after the spring bloom.

Sidansvarig: Webbredaktion|Sidan uppdaterades: 2012-09-11
Dela:

På Göteborgs universitet använder vi kakor (cookies) för att webbplatsen ska fungera på ett bra sätt för dig. Genom att surfa vidare godkänner du att vi använder kakor.  Vad är kakor?