Record Details

Seasonality of phytoplankton growth limitation by iron and manganese in subantarctic waters

CSIRO RDS Repository

View Archive Info
 
 
Field Value
 
Title Seasonality of phytoplankton growth limitation by iron and manganese in subantarctic waters
 
Creator Pauline Latour
 
Subject Biological oceanography
 
Description This record describes data products produced by Latour et al. (2023) from Marine National Facility data collected on board RV Investigator. The data products were used in research looking at the seasonality of phytoplankton growth limitation by iron and manganese in subantarctic waters.

Phytoplankton indirectly influence climate through their role in the ocean biological carbon pump. In the Southern Ocean, the subantarctic zone represents an important carbon sink, yet variables limiting phytoplankton growth are not fully constrained. Using three shipboard bioassay experiments on three separate voyages, Latour et al. evaluated the seasonality of iron (Fe) and manganese (Mn) co-limitation of subantarctic phytoplankton growth south of Tasmania, Australia. They observed a strong seasonal variation in a phytoplankton Fe limitation signal, with a summer experiment showing the greatest response to Fe additions. An autumn experiment suggested that other factors co-limited phytoplankton growth, likely low silicic acid concentrations. The phytoplankton responses to Mn additions were subtle and readily masked by the responses to Fe. Using flow cytometry, they observed that Mn may influence the growth of some small phytoplankton taxa in late summer/autumn, when they represent an important part of the phytoplankton community. In addition, Mn induced changes in the bulk photophysiology signal of the spring community. These results suggest that the importance of Mn may vary seasonally, and that its control on phytoplankton growth may be associated with specific taxa.

For more details please refer to the cited article (download link provided below): Latour, P, Strzepek, RF, Wuttig, K, van der Merwe, P, Eggins, S, Bach, LT, Boyd, PW, Ellwood, MJ, Pinfold, TL, Bowie, AR. 2022. Seasonality of phytoplankton growth limitation by iron and manganese in subantarctic waters. Earth and Space Science Open Archive [Preprint]. DOI: 10.1002/essoar.10511502.1
 
Publisher CSIRO
 
Date 2023-06-06
 
Type —
 
Format —
 
Identifier csiro:59191
 
Language —
 
Coverage —
 
Rights —