FN Archimer Export Format
PT J
TI Microscale imaging sheds light on species‐specific strategies for photo‐regulation and photo‐acclimation of microphytobenthic diatoms
BT 
AF Jesus, Bruno
   Jauffrais, Thierry
   Trampe, Erik
   Méléder, Vona
   Ribeiro, Lourenço
   Bernhard, Joan M.
   Geslin, Emmanuelle
   Kühl, Michael
AS 1:1;2:2,3;3:4;4:1;5:5;6:6;7:3;8:4;
FF 1:;2:PDG-RBE-LEADNC;3:;4:;5:;6:;7:;8:;
C1 Nantes Université, Institut des Substances et Organismes de la Mer, ISOMer, UR2160 Nantes, France
   Ifremer, IRD, Univ Nouvelle‐Calédonie Univ La Réunion, CNRS, UMR 9220 ENTROPIE, RBE/LEAD Noumea, New Caledonia
   Université d'Angers Nantes Université, Le Mans Université Angers, France
   Marine Biological Section, Department of Biology University of Copenhagen Helsingør ,Denmark
   MARE – Marine and Environmental Sciences Centre/ARNET – Aquatic Research Network Associated Laboratory, Faculty of Sciences University of Lisbon Lisbon ,Portugal
   Geology and Geophysics Department Woods Hole Oceanographic Institution Woods Hole Massachusetts, USA
C2 UNIV NANTES, FRANCE
   IFREMER, FRANCE
   UNIV ANGERS, FRANCE
   UNIV COPENHAGEN, DENMARK
   UNIV LISBON, PORTUGAL
   WHOI, USA
SI NOUMEA
SE PDG-RBE-LEADNC
UM ENTROPIE
IN WOS Ifremer UMR
   copubli-france
   copubli-europe
   copubli-univ-france
   copubli-int-hors-europe
IF 5.1
TC 5
UR https://archimer.ifremer.fr/doc/00853/96459/104775.pdf
   https://archimer.ifremer.fr/doc/00853/96459/104776.jpg
   https://archimer.ifremer.fr/doc/00853/96459/104777.jpg
   https://archimer.ifremer.fr/doc/00853/96459/104778.jpg
   https://archimer.ifremer.fr/doc/00853/96459/104779.docx
LA English
DT Article
AB Intertidal microphytobenthic (MPB) biofilms are key sites for coastal primary production, predominantly by pennate diatoms exhibiting photo‐regulation via non‐photochemical quenching (NPQ) and vertical migration. Movement is the main photo‐regulation mechanism of motile (epipelic) diatoms and because they can move from light, they show low‐light acclimation features such as low NPQ levels, as compared to non‐motile (epipsammic) forms. However, most comparisons of MPB species‐specific photo‐regulation have used low light acclimated monocultures, not mimicking environmental conditions. Here we used variable chlorophyll fluorescence imaging, fluorescent labelling in sediment cores and scanning electron microscopy to compare the movement and NPQ responses to light of four epipelic diatom species from a natural MPB biofilm. The diatoms exhibited different species‐specific photo‐regulation features and a large NPQ range, exceeding that reported for epipsammic diatoms. This could allow epipelic species to coexist in compacted light niches of MPB communities. We show that diatom cell orientation within MPB can be modulated by light, where diatoms oriented themselves more perpendicular to the sediment surface under high light vs. more parallel under low light, demonstrating behavioural, photo‐regulatory response by varying their light absorption cross‐section. This highlights the importance of considering species‐specific responses and understanding cell orientation and photo‐behaviour in MPB research. 
PY 2023
PD DEC
SO Environmental Microbiology
SN 1462-2912
PU Wiley
VL 25
IS 12
UT 001062247400001
BP 3087
EP 3103
DI 10.1111/1462-2920.16499
ID 96459
ER

EF