Plankton biomass, POC and PON concentrations, and sinking velocities during the 2008 spring diatom bloom in Disko Bay
Cobertura |
LATITUDE: 69.233300 * LONGITUDE: -53.433300 * DATE/TIME START: 2008-04-23T00:00:00 * DATE/TIME END: 2008-05-28T00:00:00 |
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Data(s) |
02/04/2010
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Resumo |
Phytoplankton and copepod succession was investigated in Disko Bay, western Greenland from February to July 2008. The spring phytoplankton bloom developed immediately after the breakup of sea ice and reached a peak concentration of 24 mg chl a/m**3 2 wk later. The bloom was analyzed during 3 phases: the developing, the decaying, and the post-bloom phases. Grazing impact by the copepod community was assessed by 4 methods; gut fluorescence, in situ faecal pellet production, and egg and faecal pellet production from bottle incubations. Calanus spp. dominated the mesozooplankton community. They were present from the initiation of the bloom but only had a small grazing impact on the phytoplankton. Consequently, there was a close coupling between the spring phytoplankton bloom and sedimentation of particulate organic carbon (POC). Out of 1836 ±180 mg C/m**2/d leaving the upper 50 m, 60 % was phytoplankton based carbon (PPC). The composition and quality of the sedimenting material changed throughout the bloom succession from PPC dominance in the initial phase with a POC/PON ratio close to 6.6 to a dominance of amorphous detritus with a higher POC/PON ratio (>10) in the post-bloom phase. The succession and fate of the phytoplankton spring bloom was controlled by nitrogen limitation and subsequent sedimentation, while grazing-mediated flux by the Calanus-dominated copepod community played a minor role in the termination of the spring bloom of Disko Bay. |
Formato |
application/zip, 3 datasets |
Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.809471 doi:10.1594/PANGAEA.809471 |
Idioma(s) |
en |
Publicador |
PANGAEA |
Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
Fonte |
Supplement to: Dünweber, Michael; Swalethorp, Rasmus; Kjellerup, Sanne; Nielsen, Torkel Gissel; Arendt, Kristine Engel; Hjorth, Morten; Tönnesson, Kajsa; Møller, Eva Friis (2010): Succession and fate of the spring diatom bloom in Disko Bay, western Greenland. Marine Ecology Progress Series, 419, 11-29, doi:10.3354/meps08813 |
Palavras-Chave | #amorphous detritus; amorphous detritus (=POC-PPC-FPC); average over all methods; bloom phase; Carbon, organic, particulate, per volume; Carbon, organic, particulate, per volume, standard deviation; Carbon, organic, particulate, standard deviation; Carbon, organic, particulate per area; Coefficient of determination; Copepoda, biomass, standard deviation; Copepoda, biomass as carbon, integrated; Copepoda C; Copepoda C std dev; copepod biomass; Date/Time; DATE/TIME; Date/time end; DEPTH, water; Depth water; Environment; FPC; FPC (faecal pellet-based POC); Grazing imp; Grazing impact; Ingestion rate, standard deviation; Ingestion rate of phytoplankton biomass per day; International Polar Year (2007-2008); IPY; IR phytopl biom; IR std dev; method (A); method (A); in % of phytoplankton biomass; method (B); method (B), in % of phytoplankton biomass; method (C); method (C), in % of phytoplankton biomass; method (D); method (D), in % of phytoplankton biomass; Nitrogen, organic, particulate; Nitrogen, organic, particulate, per volume; Nitrogen, organic, particulate, standard deviation; N subset; Particulate organic carbon/particulate organic nitrogen ratio; Particulate organic carbon/particulate organic nitrogen ratio, standard deviation; Phytoplankton, biomass, standard deviation; Phytoplankton, biomass as carbon, integrated; phytoplankton biomass; Phytopl biom std dev; Phytopl C int; POC; POC, sedimented; POC, suspended; POC/PON; POC/PON, sedimented; POC/PON, suspended; POC/PON std dev; POC (particulate organic carbon); POC std dev; PON; PON, sedimented; PON, suspended; PON std dev; PPC; PPC (chlorophyll a-based POC); R**2; Sample amount, subset; sedimented; Sinking rate; Sinking rate, standard deviation; SR; SR std dev; suspended |
Tipo |
Dataset |