Batiacasphaera micropapillataPalaeobiogeographic distribution and palaeoecological implications of a critical Neogene species complex
Published:January 01, 2013
M. Schreck, J. Matthiessen, 2013. "Batiacasphaera micropapillataPalaeobiogeographic distribution and palaeoecological implications of a critical Neogene species complex", Biological and Geological Perspectives of Dinoflagellates, J. M. Lewis, F. Marret, L. R. Bradley
Download citation file:
The extinct dinoﬂagellate cyst complex Batiacasphaera micropapillata (B. micropapillata, B. minuta) has been frequently reported from Neogene sediments of the North Atlantic region, but little is known about its palaeoecology. To utilize it for future palaeoenvironmental interpretations, distribution maps for Middle Miocene–Pliocene time slices have been generated by using new data from Ocean Drilling Program (ODP) Hole 907A (Iceland Sea) and Integrated ODP (IODP) Hole M0002A (Central Arctic Ocean) and recent publications. This species complex is adapted to outer-neritic to oceanic environments, judging by its abundance at many deep-water sites in comparison to marginal marine settings and the co-occurrence of well-known oceanic species. The centre of distribution is the high-latitude North Atlantic, but it tolerates a range of sea-surface temperatures from 7–10 °C to >20 °C. The relatively low concentration in the Arctic Ocean represents an occurrence close to its ecological limit, and suggests that it may occur in regions with pronounced seasonal gradients in temperature, sea-ice and light. Increased nutrient availability may be another important ecological factor under optimum living conditions. A distinct Late Miocene decline in the Iceland Sea and Arctic Ocean and a near-synchronous Pliocene disappearance in the North Atlantic suggest a response to Late Cenozoic cooling.
Figures & Tables
Biological and Geological Perspectives of Dinoflagellates
This volume provides an overview of current research on fossil and modern dinoflagellates, as well as highlighting research areas for future collaboration, following the DINO9 International Conference in Liverpool. The volume is organized into four themes, with a review paper for each theme written by the key-note speaker. Each theme also includes a future research foci note following discussion during the conference. The contributions are organized into the following sections: environmental change, ecology/palaeoecology, life cycles and diversity, and stratigraphy and evolution. Also included are notes from two workshops: culture experiments and dinocysts as palaeoceanographic tracers. This volume will be of interest to both the biological and Micropalaeontological communities.