Abundance patterns and isotopic signals of morphotypes of Globigerinoides ruber
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| Autores principales: | , , , , , , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
2009
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| _version_ | 1867170456499388416 |
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| author | Numberger, Lea Hemleben, Christoph Hoffmann, Ramona Mackensen, Andreas Schulz, Hartmut Wunderlich, Joern-Michael Kucera, Michal |
| author_facet | Numberger, Lea Hemleben, Christoph Hoffmann, Ramona Mackensen, Andreas Schulz, Hartmut Wunderlich, Joern-Michael Kucera, Michal |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The chemical composition of shells of the planktonic foraminifer Globigerinoides ruber (white) is frequently used to determine past sea surface conditions. Recently, it has been shown that arbitrarily defined morphotypes within this species exhibit different chemical and isotopic signatures. Here, we investigate the occurrence through time and in space of morphological types of G. ruber (white) in late Quaternary and Holocene sediments of the central and the eastern Mediterranean Sea. In 115 samples representing two distinct time intervals (MIS 1-2 and MIS 9-12) at ODP Site 964 and the piston core GeoTü-SL96, we have defined three morphological types within this species and determined their relative abundances and stable isotopic composition. A quantitative analysis of morphological variation within G. ruber (white) in four samples revealed that the subjectively defined morphotypes occupy separate segments of a continuous and homogenous morphospace. We further show that the abundance of the morphotypes changes significantly between glacials and interglacials and that the three morphotypes of G. ruber show significant offsets in their stable isotopic composition. These offsets are consistent within glacial and interglacial stages but their sign is systematically reversed between the two Sites. Since the isotopic shifts among the three G. ruber morphotypes are systematic and often exceed 1per mil, their understanding is essential for the interpretation of all G. ruber-based proxy records for the paleoceanographic development of the Mediterranean during the late Quaternary. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_729188 |
| institution | PANGAEA |
| language | en |
| publishDate | 2009 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Abundance patterns and isotopic signals of morphotypes of Globigerinoides ruber Numberger, Lea Hemleben, Christoph Hoffmann, Ramona Mackensen, Andreas Schulz, Hartmut Wunderlich, Joern-Michael Kucera, Michal 160-964A; DRILL; Drilling/drill rig; Eastern Basin; GeoTü; GeoTu_SL096; Gravity corer (Kiel type); Joides Resolution; Leg160; M51/3; Mediterranean Sea; Meteor (1986); Ocean Drilling Program; ODP; Paleoceanography at Tübingen University; SL The chemical composition of shells of the planktonic foraminifer Globigerinoides ruber (white) is frequently used to determine past sea surface conditions. Recently, it has been shown that arbitrarily defined morphotypes within this species exhibit different chemical and isotopic signatures. Here, we investigate the occurrence through time and in space of morphological types of G. ruber (white) in late Quaternary and Holocene sediments of the central and the eastern Mediterranean Sea. In 115 samples representing two distinct time intervals (MIS 1-2 and MIS 9-12) at ODP Site 964 and the piston core GeoTü-SL96, we have defined three morphological types within this species and determined their relative abundances and stable isotopic composition. A quantitative analysis of morphological variation within G. ruber (white) in four samples revealed that the subjectively defined morphotypes occupy separate segments of a continuous and homogenous morphospace. We further show that the abundance of the morphotypes changes significantly between glacials and interglacials and that the three morphotypes of G. ruber show significant offsets in their stable isotopic composition. These offsets are consistent within glacial and interglacial stages but their sign is systematically reversed between the two Sites. Since the isotopic shifts among the three G. ruber morphotypes are systematic and often exceed 1per mil, their understanding is essential for the interpretation of all G. ruber-based proxy records for the paleoceanographic development of the Mediterranean during the late Quaternary. |
| title | Abundance patterns and isotopic signals of morphotypes of Globigerinoides ruber |
| topic | 160-964A; DRILL; Drilling/drill rig; Eastern Basin; GeoTü; GeoTu_SL096; Gravity corer (Kiel type); Joides Resolution; Leg160; M51/3; Mediterranean Sea; Meteor (1986); Ocean Drilling Program; ODP; Paleoceanography at Tübingen University; SL |
| url | https://doi.org/10.1594/PANGAEA.729188 |