Photoadaptive response during the development of a coustal Antarctic diatom bloom and relationship to water column stability
The raio of the xanthophylll pigments diadinoxanthin and diatoxanthin to chlorophyll a [(DD+DT}:Chl a ] was used as a photoadaptive index during the development of a large Antarctic diatom bloom. This index was found to track fluctuations in the incident solar irradiance and the in situ light field...
Published in: | Limnology and Oceanography |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
1998
|
Subjects: | |
Online Access: | http://dx.doi.org/10.4319/lo.1998.43.1.0146 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1998.43.1.0146 https://onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1998.43.1.0146 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1998.43.1.0146 |
Summary: | The raio of the xanthophylll pigments diadinoxanthin and diatoxanthin to chlorophyll a [(DD+DT}:Chl a ] was used as a photoadaptive index during the development of a large Antarctic diatom bloom. This index was found to track fluctuations in the incident solar irradiance and the in situ light field over a 3 order magnitude change in the water column biomass. Depth profiles of the (DD+DT}:Chl a ratio showed that the upper mixed layer, assessed by physical data, was in fact stable over the course of the month. Diel experiments conducted over the same period showed a delayed (5–8 h) response of the DD+DT pool to the instantaneous Q par (400–700 nm) irradiance. These time series results illustrate the potential use of xanthophyll pigmnents in assessing phytoplankton light histories and the degree of water column stability. |
---|