FN Archimer Export Format
PT J
TI Re-oligotrophication trajectories of macrophyte assemblages in Mediterranean coastal lagoons based on 17-year time-series
BT 
AF LE FUR, Ines
   DE WIT, Rutger
   PLUS, Martin
   OHEIX, Jocelyne
   DEROLEZ, Valerie
   SIMIER, Monique
   MALET, Nathalie
   OUISSE, Vincent
AS 1:1;2:2;3:3;4:1;5:1;6:5;7:4;8:1;
FF 1:PDG-ODE-LITTORAL-LERLR;2:;3:PDG-ODE-DYNECO-PELAGOS;4:PDG-ODE-LITTORAL-LERLR;5:PDG-ODE-LITTORAL-LERLR;6:;7:PDG-ODE-LITTORAL-LERPAC;8:PDG-ODE-LITTORAL-LERLR;
C1 Univ Montpellier, CNRS, MARBEC, Ifremer,IRD,CS 30171, F-34203 Sete, France.
   Univ Montpellier, CNRS, MARBEC, Ifremer,IRD,CC093, F-34095 Montpellier, France.
   IFREMER, Lab Ecol Pelag DYNECO PELAGOS, Ctr Bretagne, ZI Pointe Diable,CS 10070, F-29280 Plouzane, France.
   IFREMER, Lab Environm Ressources Provence Azur Corse, Stn Corse, F-20600 Zi Furiani, Bastia, France.
C2 IFREMER, FRANCE
   CNRS, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
   IRD, FRANCE
SI SETE
   BREST
   CORSE
SE PDG-ODE-LITTORAL-LERLR
   PDG-ODE-DYNECO-PELAGOS
   PDG-ODE-LITTORAL-LERPAC
UM MARBEC
IN WOS Ifremer UPR
   WOS Ifremer UMR
   WOS Cotutelle UMR
   copubli-france
   copubli-p187
IF 2.326
TC 27
UR https://archimer.ifremer.fr/doc/00474/58555/61110.pdf
   https://archimer.ifremer.fr/doc/00474/58555/61111.pdf
LA English
DT Article
DE ;Submerged aquatic vegetation;Recovery;Nutrient reduction;Restoration;Long-term data series;Resilience;Regime shift;Coastal lagoon
AB Since the mid-20th century, Mediterranean lagoons have been affected by eutrophication, leading to significant changes in primary producers. In the early 2000s, management actions have been implemented to reduce nutrient inputs with the aim to achieve a good ecological status as requested by the EU water framework directive. As a result of these actions, a sharp decline in nutrient loads has been recorded in several lagoons leading to an oligotrophication of the water column. The analyses of a long-term data set (1998-2015) of 21 polyhaline and euhaline lagoons with contrasting trophic status allowed us to infer a general scheme for the changes in macrophyte assemblages during the oligotrophication process. Placing hypertrophic and oligotrophic conditions end to end, we inferred that the general pattern for the re-oligotrophication trajectory in Mediterranean coastal lagoons is described by the following sequence, with regime shifts between each state: (1) bare non-vegetated sediments, phytoplankton-dominated state; (2) opportunistic macroalgae; (3) seagrass and perennial macroalgae dominated state. However, we did not observe the latter regime shift for the most eutrophicated lagoons, which, so far, remained stuck in the opportunistic macroalgae state. So far, the shift from dominance of opportunistic macroalgae to a system dominated by seagrasses was only observed in a single lagoon where seagrasses had never completely disappeared, which possibly relates to resilience. More generally, the conditions favoring regime shifts from opportunistic macroalgae to seagrasses are still poorly understood. In conclusion, we describe a generic pattern for re-oligotrophication of Mediterranean coastal lagoons, although a full recovery from highly eutrophied to oligotrophic conditions may require more than a decade and may include conditions that remain so far poorly recognized. 
PY 2019
PD JAN
SO Marine Ecology Progress Series
SN 0171-8630
PU Inter-research
VL 608
UT 000456206700002
BP 13
EP 32
DI 10.3354/meps12814
ID 58555
ER

EF