Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Importance of deep mixing and silicic acid in regulating phytoplankton biomass and community in the iron-limited Antarctic Polar Front region in summer
Cheah, W.; Soppa, M.A.; Wiegmann, S.; Ossebaar, S.; Laglera, L.M.; Strass, V.H.; Santos-Echeandía, J.; Hoppema, M.; Wolf-Gladrow, D.; Bracher, A. (2017). Importance of deep mixing and silicic acid in regulating phytoplankton biomass and community in the iron-limited Antarctic Polar Front region in summer. Deep-Sea Res., Part II, Top. Stud. Oceanogr. 138: 74-85. https://dx.doi.org/10.1016/j.dsr2.2016.05.019
In: Deep-Sea Research, Part II. Topical Studies in Oceanography. Pergamon: Oxford. ISSN 0967-0645; e-ISSN 1879-0100
|  |
| Author keywords |
Phytoplankton; Photophysiology; Nutrients; Antarctic Polar Front |
| Auteurs | | Top |
- Cheah, W.
- Soppa, M.A.
- Wiegmann, S.
- Ossebaar, S.
|
- Laglera, L.M.
- Strass, V.H.
- Santos-Echeandía, J.
|
- Hoppema, M.
- Wolf-Gladrow, D.
- Bracher, A.
|
| Abstract |
Phytoplankton community structure and their physiological response in the vicinity of the Antarctic Polar Front (APF; 44°S to 53°S, centred at 10°E) were investigated as part of the ANT-XXVIII/3 Eddy-Pump cruise conducted in austral summer 2012. Our results show that under iron-limited View the MathML source(<0.3μmolm−3) conditions, high total chlorophyll-a (TChl-a) concentrations View the MathML source(>0.6mgm−3) can be observed at stations with deep mixed layer View the MathML source(>60m) across the APF. In contrast, light was excessive at stations with shallower mixed layer and phytoplankton were producing higher amounts of photoprotective pigments, diadinoxanthin (DD) and diatoxanthin (DT), at the expense of TChl-a, resulting in higher ratios of (DD+DT)/TChl-a. North of the APF, significantly lower silicic acid (Si(OH)4) concentrations View the MathML source(<2mmolm−3) lead to the domination of nanophytoplankton consisting mostly of haptophytes, which produced higher ratios of (DD+DT)/TChl-a under relatively low irradiance conditions. The Si(OH)4 replete View the MathML source(>5mmolm−3) region south of the APF, on the contrary, was dominated by microphytoplankton (diatoms and dinoflagellates) with lower ratios of (DD+DT)/TChl-a, despite having been exposed to higher levels of irradiance. The significant correlation between nanophytoplankton and (DD+DT)/TChl-a indicates that differences in taxon-specific response to light are also influencing TChl-a concentration in the APF during summer. Our results reveal that provided mixing is deep and Si(OH)4 is replete, TChl-a concentrations higher than View the MathML source0.6mgm−3 are achievable in the iron-limited APF waters during summer. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
