FN Archimer Export Format
PT J
TI Seasonal variations in photosynthetic irradiance response curves of macrophytes from a Mediterranean coastal lagoon
BT 
AF PLUS, Martin
   AUBY, Isabelle
   VERLAQUE, Marc
   LEVAVASSEUR, Guy
AS 1:;2:;3:;4:;
FF 1:PDG-DOP-LER-LERAR;2:PDG-DOP-LER-LERAR;3:;4:;
C1 DEL AR, Lab IFREMER, F-33120 Arcachon, France.
   CNRS, UMR 6540, F-13288 Marseille, France.
   CNRS, Stn Biol Roscoff, UMR 7127, F-29682 Roscoff, France.
C2 DEL AR, FRANCE
   CNRS, FRANCE
   CNRS, FRANCE
SI ARCACHON
SE PDG-DOP-LER-LERAR
IN WOS Ifremer jusqu'en 2018
IF 1.344
TC 33
UR https://archimer.ifremer.fr/doc/2005/publication-465.pdf
LA English
DT Article
DE ;Thau lagoon;Phaeophyceae;Rhodophyceae;Chlorophyceae;Seagrasses;Seasonal variations;Oxygen method;Macrophytes;Light response curve;Photosynthesis
AB The main photosynthesis and respiration parameters (dark respiration rate, light saturated production rate, saturation irradiance, photosynthetic efficiency) were measured on a total of 23 macrophytes of the Than lagoon (2 Phanerogams, 5 Chlorophyceae, 10 Rhodophyceae and 6 Phaeophyceae). Those measurements were performed in vitro under controlled conditions, close to the natural ones, and at several seasons. Concomitantly, measurements of pigment concentrations, carbon, phosphorous and nitrogen contents in tissues were performed. Seasonal intra-specific variability of photosynthetic parameters was found very high, enlightening an important acclimatation capacity. The highest photosynthetic capacities were found for Chlorophyceae (e.g. Monostroma obscurum thalli at 17 degrees C, 982 mu mol O-2 g(-1) dw h(-1) and 9.1 mu mol O-2 g(-1) dw h(-1)/ mu mol photons m(-2) s(-1), respectively for light saturated net production rate and photosynthetic efficiency) and Phanerogams (e.g. Nanozostera noltii leaves at 25 degrees C, 583 mu mol O-2 g(-1) dw h(-1) and 2.6 mu mol O-2 g(-1) dw h(-1)/mu mol photons m(-2) s(-1) respectively for light saturated net production rate and photosynthetic efficiency). As expected, species with a high surface/volume ratio were found to be more productive than coarsely branched thalli and thick blades shaped species. Contrary to R-d (ranging 6.7-794 mu mol g(-1) dw h(-1), respectively for Rytiphlaea tinctoria at 7 degrees C and for Dasya sessilis at 25 degrees C) for which a positive relationship with water temperature was found whatever the species studied, the evolution of PII curves with temperature exhibited different responses amongst the species. The results allowed to show summer nitrogen limitation for some species (Gracilaria bursa-pastoris and Ulva spp.) and to propose temperature preferences based on the photosynthetic parameters for some others (N. noltii, Zostera marina, Chaetomorpha linum). 
PY 2005
PD FEB
SO Aquatic Botany
SN 0304-3770
PU Elsevier
VL 81
IS 2
UT 000227816100003
BP 157
EP 173
DI 10.1016/j.aquabot.2004.10.004
ID 465
ER

EF