Succession and fate of the spring diatom bloom in Disko Bay, western Greenland

Autor:	Eva Friis Møller, Kajsa Tönnesson, Sanne Kjellerup, Michael Dünweber, Rasmus Swalethorp, Torkel Gissel Nielsen, Morten Hjorth, Kristine Engel Arendt
Rok vydání:	2010
Předmět:	Ecology Greenland Aquatic Science Plankton Spring bloom Biology calanus spp biology.organism_classification Zooplankton Algal bloom spring bloom faecal pellets Arctic Oceanography Phytoplankton Calanus grazing sedimentation Bloom Bay Ecology Evolution Behavior and Systematics
Zdroj:	Dünweber, M, Swalethorp, R, Hansen, S K, Nielsen, T G, Arendt, K E, Hjorth, M, Tönnesson, K & Møller, E F 2010, ' Succession and fate of the spring diatom bloom in Disko Bay, western Greenland ', Marine Ecology-Progress Series, vol. 419, pp. 11-29 . https://doi.org/10.3354/meps08813
ISSN:	1616-1599 0171-8630
DOI:	10.3354/meps08813
Popis:	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 dur- ing 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 commu- nity. They were present from the initiation of the bloom but only had a small grazing impact on the phyto- plankton. Consequently, there was a close coupling between the spring phytoplankton bloom and sed- imentation of particulate organic carbon (POC). Out of 1836 ± 180 mg C m -2 d -1 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 ra- tio 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 lim- itation 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9010aacc1be83ad7afa89addd078c694 https://doi.org/10.3354/meps08813 Zobrazit plný text záznamu