FN Archimer Export Format PT J TI Poor correlation between phytoplankton community growth rates and nutrient concentration in the sea BT AF REGAUDIE-DE-GIOUX, Aurore SAL, S. LOPEZ-URRUTIA, A. AS 1:1;2:1;3:1; FF 1:;2:;3:; C1 Inst Oceanog Espanol, Gijon 33212, Spain. C2 IEO, SPAIN IN DOAJ IF 3.7 TC 5 UR https://archimer.ifremer.fr/doc/00419/53071/54039.pdf LA English DT Article AB Nutrient availability is one of the major factors regulating marine productivity and phytoplankton community structure. While the response of phytoplankton species to nutrient variation is relatively well known, that of phytoplankton community remains unclear. We question whether phytoplankton community growth rates respond to nutrient concentration in a similar manner to phytoplankton species composing the community, that is, following Monod's model. Data on in situ marine community growth rates in relation to nutrient concentration and the behaviour of a simple multi-species community model suggest that community growth rate does not respond to nutrient concentration according to the Monod equation. Through a simulation study we show this can be explained as a consequence of changes in size structure. Marine biogeochemical models must not parameterize phytoplankton community growth rate response to nutrient concentration using a single Monod equation but rather involve different phytoplankton functional groups each with different equation parameters. PY 2015 SO Biogeosciences SN 1726-4170 PU Copernicus Gesellschaft Mbh VL 12 IS 6 UT 000352112900020 BP 1915 EP 1923 DI 10.5194/bg-12-1915-2015 ID 53071 ER EF