%0 Journal Article
%T Microbial community production, respiration and structure of the microbial food web of an ecosystem in the northeastern Atlantic Ocean
%+ Laboratoire de MicrobiologiE de Géochimie et d'Ecologie Marines (LMGEM)
%+ Hellenic Centre for Marine Research (HCMR)
%+ Ecosystèmes Littoraux et Cotiers
%+ Laboratoire d'océanographie et de biogéochimie (LOB)
%+ Laboratoire d'océanographie de Villefranche (LOV)
%A Maixandeau, Anne
%A Lefèvre, Dominique
%A Karayanni, Hera
%A Christaki, Urania
%A van Wambeke, France
%A Thyssen, Melilotus
%A Denis, Michel
%A Fernandez, Camila I.
%A Uitz, Julia
%A Leblanc, Karine
%A Queguiner, Bernard
%< avec comité de lecture
%@ 2169-9275
%J Journal of Geophysical Research. Oceans
%I Wiley-Blackwell
%V 110
%N C7
%P C07S17
%8 2005
%D 2005
%R 10.1029/2004JC002694
%Z Sciences of the Universe [physics]/Earth Sciences/Oceanography
%Z Life Sciences [q-bio]/Microbiology and Parasitology
%Z Environmental Sciences/Biodiversity and EcologyJournal articles
%X Gross community production (GCP), dark community respiration (DCR), and the biomass of the different size classes of organisms in the microbial community were measured in the northeastern Atlantic basin as part of the Programme Océan Multidisciplinaire Méso Echelle (POMME) project. The field experiment was conducted during three seasons (winter, spring, and late summer–fall) in 2001. Samples were collected from four different mesoscale structures within the upper 100 m. GCP rates increased from winter (101 ± 24 mmol O2 m−2 d−1) to spring (153 ± 27 mmol O2 m−2 d−1) and then decreased from spring to late summer (44 ± 18 mmol O2 m−2 d−1). DCR rates increased from winter (−47 ± 18 mmol O2 m−2 d−1) to spring (−97 ± 7 mmol O2 m−2 d−1) and then decreased from spring to late summer (50 ± 7 mmol O2 m−2 d−1). The onset of stratification depended on latitude as well as on the presence of mesoscale structures (eddies), and this largely contributed to the variability of GCP. The trophic status of the POMME area was defined as net autotrophic, with a mean annual net community production rate of +38 ± 18 mmol O2 m−2 d−1, exhibiting a seasonal variation from +2 ± 20 mmol O2 m−2 d−1 to +57 ± 20 mmol O2 m−2 d−1. This study highlights that small organisms (picoautotrophs, nanoautotrophs, and bacteria) are the main organisms contributing to biological fluxes throughout the year and that episodic blooms of microphytoplankton are related to mesoscale structures.
%G English
%2 https://hal.science/hal-00092669/document
%2 https://hal.science/hal-00092669/file/Maixandeau%20et%20al%202005_JGR.pdf
%L hal-00092669
%U https://hal.science/hal-00092669
%~ SDE
%~ INSU
%~ UPMC
%~ CNRS
%~ UNIV-AMU
%~ MIO
%~ OSU-INSTITUT-PYTHEAS
%~ GIP-BE
%~ LOPB
%~ LMGEM
%~ LOV
%~ UPMC_POLE_3
%~ SORBONNE-UNIVERSITE
%~ SU-SCIENCES
%~ SU-SCI
%~ UMS-829
%~ SU-TI
%~ LOV_OMTAB
%~ ALLIANCE-SU
%~ TEST3-HALCNRS