Does irradiance influence the tolerance of marine phytoplankton to high pH?
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Does irradiance influence the tolerance of marine phytoplankton to high pH? / Nielsen, Lasse T; Lundholm, Nina; Hansen, Per Juel.
In: Marine Biology Research, Vol. 3, No. 6, 2007, p. 446-453.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Does irradiance influence the tolerance of marine phytoplankton to high pH?
AU - Nielsen, Lasse T
AU - Lundholm, Nina
AU - Hansen, Per Juel
N1 - Keywords: DIC; growth; Heterocapsa triquetra; light; Nitzschia navis-varingica; pH
PY - 2007
Y1 - 2007
N2 - The effect of irradiance on the tolerance to high pH of the two marine protists Heterocapsa triquetra and Nitzschia navis-varingica were investigated by conducting a series of pH drift experiments. In order to select appropriate levels of irradiance for the pH drift experiments, the photosynthetic activity and the growth rates of the two species were investigated at irradiances from 5 to 250 µmol photons m-2 s-1. Irradiances of 20, 35, 80 and 250 µmol photons m-2 s-1 were subsequently selected for further studies, because they represented conditions from severely light limited to fully light saturated with respect to photosynthesis and growth. At all four light levels, the pH limits for growth were 9.29-9.42 for H. triquetra and 9.54-9.77 for N. navis-varingica. The pH limit for growth was not positively correlated to irradiance in either of the species. We therefore conclude that low light does not reduce the pH tolerance of the protists studied
AB - The effect of irradiance on the tolerance to high pH of the two marine protists Heterocapsa triquetra and Nitzschia navis-varingica were investigated by conducting a series of pH drift experiments. In order to select appropriate levels of irradiance for the pH drift experiments, the photosynthetic activity and the growth rates of the two species were investigated at irradiances from 5 to 250 µmol photons m-2 s-1. Irradiances of 20, 35, 80 and 250 µmol photons m-2 s-1 were subsequently selected for further studies, because they represented conditions from severely light limited to fully light saturated with respect to photosynthesis and growth. At all four light levels, the pH limits for growth were 9.29-9.42 for H. triquetra and 9.54-9.77 for N. navis-varingica. The pH limit for growth was not positively correlated to irradiance in either of the species. We therefore conclude that low light does not reduce the pH tolerance of the protists studied
U2 - 10.1080/17451000701711820
DO - 10.1080/17451000701711820
M3 - Journal article
VL - 3
SP - 446
EP - 453
JO - Marine Biology Research
JF - Marine Biology Research
SN - 1745-1000
IS - 6
ER -
ID: 9391470