Long- and short-term photoacclimation in epipsammon from non-tidal coastal shallows compared to epipelon from intertidal mudflat
Filip Pniewski , Pierre Richard , Adam Latała , Gerard Blanchard
AbstractLong- and short-term photoacclimation and their interaction were determined in two types of microphytobenthos assemblages, i.e. epipelon from an intertidal mudflat and epipsammon from non-tidal sandy coastal shallows collected during summer and autumn months. Microphytobenthos photophysiology was assessed from steady-state light curve (SSLC) and rapid light-response curves (RLC) of variable chlorophyll fluorescence. The epipelon was low light acclimated, whereas in the epipsammon high light acclimation was observed. The epipelon turned out to be more susceptible to high light and in autumn a dear down turn in the relative electron transport rates was recorded. Long-term photoacclimation strongly affected both microphytobenthos types' short-term light responses. The epipelon acclimated to high ambient light intensities through the decreased light absorption and energy dissipation. The epipsammon, on the other hand, developed physiological flexibility allowing efficient use of the absorbed light and thus providing protection against higher irradiance.
|Journal series||Journal of Sea Research, ISSN 1385-1101, (A 30 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||photoacclimation, microphytobenthos, Chlorophyll fluorescence, rapid light curves, non-photochemical quenching, Baltic Sea|
|ASJC Classification||; ;|
|Score||= 30.0, 30-09-2019, ArticleFromJournal|
|Publication indicators||= 1; : 2016 = 0.931; : 2017 = 1.729 (2) - 2017=1.986 (5)|
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