FN Archimer Export Format
PT J
TI Phytoplankton strategies to exploit nutrients in coastal lagoons with different eutrophication status during re-oligotrophication
BT 
AF Leruste, A
   Guilhaumon, F
   De Wit, R
   Malet, Nathalie
   Collos, Y
   Bec, Beatrice
AS 1:1;2:3;3:4;4:2;5:4;6:1;
FF 1:;2:;3:;4:PDG-ODE-LITTORAL-LERPAC;5:;6:;
C1 MARine Biodiversity Exploitation and Conservation MARBEC, Université de Montpellier, IRD, Ifremer, CNRS. Bât. 24, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
   Ifremer, LEPAC-Corse, ZI Furiani, Im Agostini, 20600 Bastia, France
   MARine Biodiversity Exploitation and Conservation MARBEC, Université de Montpellier, IRD, Ifremer, CNRS. Bât. 24, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
   MARine Biodiversity Exploitation and Conservation MARBEC, Université de Montpellier, IRD, Ifremer, CNRS. Bât. 24, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
C2 UNIV MONTPELLIER, FRANCE
   IFREMER, FRANCE
   IRD, FRANCE
   CNRS, FRANCE
SI CORSE
SE PDG-ODE-LITTORAL-LERPAC
UM MARBEC
IN WOS Ifremer UPR
   WOS Cotutelle UMR
   copubli-france
   copubli-p187
   copubli-univ-france
IF 1.841
TC 10
UR https://archimer.ifremer.fr/doc/00508/61978/66084.pdf
   https://archimer.ifremer.fr/doc/00508/61978/66085.pdf
LA English
DT Article
DE ;Growth rate;Nutrient limitation;Dilution experiment;HPLC
AB We studied a mesotrophic and a hypertrophic Mediterranean coastal lagoon, both of which had been simultaneously subjected to a nutrient input reduction for 9 yr. We compared these 2 lagoons to an oligotrophic coastal lagoon. Using bioassays comprising 24 h incubations with added phosphorus and/or ammonium, we investigated the response of the phytoplankton communities to nutrient enrichment during summer in terms of biomass, size class structure, abundance and growth. For nitrogen and phosphorus, we identified which nutrient limited phytoplankton growth, and what strategies of nutrient exploitation the communities adopted to cope with these limitations. Ultraphytoplankton dominated the 3 communities, but it differed in composition among the lagoons. Green algae dominated in the hypertrophic lagoon, whereas the mesotrophic lagoon presented a higher diversity of phytoplankton groups. Picocyanobacteria and small diatoms were the most abundant groups in the oligotrophic lagoon, although they accounted for less biomass than green algae. The communities of the mesotrophic and the hypertrophic lagoons strongly responded to the nutrient pulse, showing that the re-oligotrophication trajectories of these lagoons were still very vulnerable to occasional eutrophication events. On the other hand, the oligotrophic lagoon marginally responded to the enrichment, indicating its adaptation to nutrient-depleted conditions. We observed a shift along the eutrophication gradient, from a co-limitation by N and P in the oligotrophic and the mesotrophic lagoons to a single and strong N limitation in the hypertrophic lagoon. Each community demonstrated specific use of internal, external or recycled nutrient pools under experimentally induced limitation.     
PY 2019
SO Aquatic Microbial Ecology
SN 0948-3055
PU Inter-Research Science Center
VL 83
IS 2
UT 000487116100003
BP 131
EP 146
DI 10.3354/ame01906
ID 61978
ER

EF