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The study investigates the morphological variability of the dinoflagellate cyst Operculodinium centrocarpum (resting cyst of Protoceratium reticulatum) in core-top samples distributed over the Southern Hemisphere and the tropics in relation to sea-surface temperature (SST) and sea-surface salinity (SSS) at the corresponding sites. The process lengths show a moderate inverse relationship to summer SST (sSST) (R² = 0.44) and sSSS/sSST (R² = 0.4), however, lateral transport of cysts probably produced noise in the plots. After excluding tropical and Southern Hemisphere sites considered to have been affected by long distance lateral transport, the relationship between process length and density follows the equation sD = 0.8422x + 1016.9 (R² = 0.55) with a Root Mean Square Error = 0.63 kg m^− 3, while the negative correlation with sSST increases up to R² = 0.79. Next to salinity, this study thus highlights the importance of a second factor, temperature, affecting process length in the topics and the Southern Hemisphere oceans.

Item Type:	Refereed Article
Keywords:	paleosalinity dinoflagellate cysts, Operculodinium centrocarpum, process length, salinity, temperature, density, Southern Hemisphere, tropics
Research Division:	Biological Sciences
Research Group:	Ecology
Research Field:	Marine and estuarine ecology (incl. marine ichthyology)
Objective Division:	Environmental Management
Objective Group:	Coastal and estuarine systems and management
Objective Field:	Coastal or estuarine biodiversity
UTAS Author:	McMinn, A (Professor Andrew McMinn)
ID Code:	76939
Year Published:	2012
Web of Science® Times Cited:	20
Deposited By:	IMAS Research and Education Centre
Deposited On:	2012-03-15
Last Modified:	2015-07-28
Downloads:	2 View Download Statistics