FN Archimer Export Format
PT J
TI Physiological and behavioral responses of phytoplankton communities to nutrient availability in a disturbed Mediterranean coastal lagoon
BT 
AF Leruste, A.
   Pasqualini, V.
   Garrido, M.
   Malet, Nathalie
   De Wit, R.
   BEC, Beatrice
AS 1:1,2;2:1;3:1,3;4:4;5:2;6:2;
FF 1:;2:;3:;4:PDG-ODE-LITTORAL-LERPAC;5:;6:;
C1 UMR SPE CNRS/UMS Stella Mare CNRS, Université de Corse, 20250, Corte, France
   MARine Biodiversity Exploitation and Conservation MARBEC, Université de Montpellier, IRD, Ifremer, CNRS. Bât. 24, Place Eugène Bataillon, 34095, Montpellier cedex 5, France
   Environmental Agency of Corsica, 7 Avenue Jean Nicoli, 20250, Corte, France
   Ifremer, Laboratoire Environment Resources Provence-Azur-Corse (LER/PAC), Station de Bastia, Z.I. Furiani, Immeuble Agostini, 20600, Bastia, France
C2 UNIV CORSE, FRANCE
   UNIV MONTPELLIER, FRANCE
   OFF ENVIRON CORSE, FRANCE
   IFREMER, FRANCE
SI CORSE
SE PDG-ODE-LITTORAL-LERPAC
UM MARBEC
IN WOS Ifremer UPR
   WOS Cotutelle UMR
   copubli-france
   copubli-univ-france
IF 2.333
TC 19
UR https://archimer.ifremer.fr/doc/00481/59238/61948.pdf
LA English
DT Article
DE ;Growth rate;Dilution experiment;Eutrophication;Functional traits
AB Short-term bioassays were conducted in Biguglia lagoon (Corsica) to study the physiological and behavioral responses of phytoplankton to N- and P-availability. Natural communities were collected in two stations representative of the two sub-basins, at three periods with contrasting environmental characteristics to address the impact of seasonal variability. These samples were separately enriched with a full N and P enrichment, and with enrichments minus N or minus P. Phytoplankton size structuration, diversity, and growth of the total phytoplankton, the micro-, nano- and ultraphytoplankton were evaluated using spectrofluorimetry, and optical microscopy. Results showed that the communities were fueled by NO3− in the wet periods (autumn and spring) and NH4+ in summer. The phytoplankton communities displayed highest cell size in autumn, with high abundances of nanoflagellates, and smallest cell size in summer with a large dominance of phycocyanin-rich picocyanobacteria. Blooms of dinoflagellates also occurred during the wet periods, coinciding with high N:P ratios. The full enrichment has not stimulated phytoplankton growth in autumn, suggesting the importance of other controlling factors such as light, a possible NH4+ inhibition or the use of mixotrophic abilities. In spring, communities have displayed single P-limitation in the northern basin and different N and P co-limitations in the southern basin. In summer, the full enrichment consistently stimulated the growth of all cell sizes. The communities showed high N and P co-limitations, which is consistent with growing observations in aquatic ecosystems, and reflects the different functional responses of phytoplankton communities to the nutrient availability. 
PY 2019
PD APR
SO Estuarine Coastal And Shelf Science
SN 0272-7714
PU Elsevier BV
VL 219
UT 000462100000018
BP 176
EP 188
DI 10.1016/j.ecss.2019.02.014
ID 59238
ER

EF