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Photoprotection capacity differs among diatoms: Possible consequences on the spatial distribution of diatoms related to fluctuations in the underwater light climate
Author(s) -
Lavaud Johann,
Strzepek Robert F.,
Kroth Peter G.
Publication year - 2007
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.2007.52.3.1188
Subject(s) - photoinhibition , photoprotection , diatom , phytoplankton , irradiance , range (aeronautics) , adaptation (eye) , ecology , environmental science , photosynthesis , biology , estuary , acclimatization , climate change , species distribution , habitat , algae , oceanography , photosystem ii , botany , physics , nutrient , materials science , quantum mechanics , neuroscience , composite material , geology
In this study, we show a fundamental difference between diatom species from different marine habitats in their ability to cope with changes in irradiance. Estuarine species show a higher and more flexible capacity for photoprotection than oceanic and coastal species, and when exposed to excess light, the impairment of their photosynthetic capacity because of photoinhibition was reduced. This resulted in maintenance of growth in a fluctuating light regime, conferring the estuarine species an adaptive advantage. The ability of diatoms, and to a larger extent other phytoplankton, to occupy a wide range of ecological niches depends critically on their capacity to exploit the differences in underwater light climate. These results might explain how diatoms adapt to the challenge of maintaining optimal photosynthetic production in turbulent waters, in which the rate of light change is high.