TY - JOUR
T1 - Morphometry, biogeography and ecology of Calcidiscus and Umbilicosphaera in the South Atlantic
AU - Baumann, Karl Heinz
AU - Saavedra-Pellitero, Mariem
AU - Böckel, Babette
AU - Ott, Carola
N1 - Funding Information:
We are grateful to the officers and crew of the research vessels METEOR and POLARSTERN for their support and help in retrieving the samples. We greatly appreciate the comments and advice advanced by Mário Cachão and an anonymous reviewer, which have led to improvement of the manuscript. Marius Becker (Marum) is acknowledged for his help with MATLAB™ and Mathieu Martinez (Marum) for his assistance in the translation into French. This study was funded through the DFG-Research Center/Cluster of Excellence “The Ocean in the Earth System” (old subproject A9). The data presented in this study is archived in the PANGAEA database ( www.pangaea.de ) and will be available upon publication.
Publisher Copyright:
© 2016
PY - 2016/7/1
Y1 - 2016/7/1
N2 - Here we present morphometrical evaluation, biogeographical distribution patterns and ecological information for five coccolithophore taxa (Calcidiscus leptoporus, C. leptoporus small, C. quadriperforatus, Umbilicosphaera foliosa and U. sibogae). This information is based on data obtained from surface sediments from the South Atlantic. The three Calcidiscus taxa can easily been distinguished by a combination of size and qualitative characters of their distal shields. Mostly encountered in the temperate to sub-polar regions C. leptoporus is the most abundant taxon and exhibits a negative correlation to temperature and salinity. Both, C. leptoporus small and C. quadriperforatus reach their maximum abundances also at higher latitudes and in the SW-African upwelling area. Their distributions therefore suggest preference for nutrient-enriched waters, which is also indicated by CCA. The two circular Umbilicosphaera species exhibit significant differences in coccolith morphology and show little overlap in size. Highest abundances are encountered in sub-tropical latitudes and are mainly derived from U. sibogae. In contrast, U. foliosa is present in very low abundances. Both species exhibit a preference for warm and oligotrophic conditions. However, U. foliosa increases in relative proportion to U. sibogae at the southernmost locations and in the Benguela upwelling. This could be interpreted as an affinity for slightly cooler and nutrient-enriched environments.
AB - Here we present morphometrical evaluation, biogeographical distribution patterns and ecological information for five coccolithophore taxa (Calcidiscus leptoporus, C. leptoporus small, C. quadriperforatus, Umbilicosphaera foliosa and U. sibogae). This information is based on data obtained from surface sediments from the South Atlantic. The three Calcidiscus taxa can easily been distinguished by a combination of size and qualitative characters of their distal shields. Mostly encountered in the temperate to sub-polar regions C. leptoporus is the most abundant taxon and exhibits a negative correlation to temperature and salinity. Both, C. leptoporus small and C. quadriperforatus reach their maximum abundances also at higher latitudes and in the SW-African upwelling area. Their distributions therefore suggest preference for nutrient-enriched waters, which is also indicated by CCA. The two circular Umbilicosphaera species exhibit significant differences in coccolith morphology and show little overlap in size. Highest abundances are encountered in sub-tropical latitudes and are mainly derived from U. sibogae. In contrast, U. foliosa is present in very low abundances. Both species exhibit a preference for warm and oligotrophic conditions. However, U. foliosa increases in relative proportion to U. sibogae at the southernmost locations and in the Benguela upwelling. This could be interpreted as an affinity for slightly cooler and nutrient-enriched environments.
KW - Calcidiscus
KW - Coccolithophore
KW - Ecology
KW - Morphometry
KW - South Atlantic
KW - Umbilicosphaera
UR - http://www.scopus.com/inward/record.url?scp=84962672189&partnerID=8YFLogxK
U2 - 10.1016/j.revmic.2016.03.001
DO - 10.1016/j.revmic.2016.03.001
M3 - Article
AN - SCOPUS:84962672189
SN - 0035-1598
VL - 59
SP - 239
EP - 251
JO - Revue de Micropaléontologie
JF - Revue de Micropaléontologie
IS - 3
ER -