Modern environmental conditions recorded in surface sediment samples off W and SW Indonesia: planktonic foraminifera and biogenic compounds analyses
A total of 69 surface sediment samples from several fore-arc basins located west and southwest of the Indonesian Archipelago was analyzed with respect to the faunal composition of planktonic foraminifera, the stable oxygen and carbon isotopic signal of a surface-dwelling ( Globigerinoides ruber ) an...
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Online Access: | https://doi.org/10.1016/j.marmicro.2007.06.004 http://ecite.utas.edu.au/145756 |
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ftunivtasecite:oai:ecite.utas.edu.au:145756 2023-05-15T18:00:34+02:00 Modern environmental conditions recorded in surface sediment samples off W and SW Indonesia: planktonic foraminifera and biogenic compounds analyses Mohtadi, M Max, L Hebbeln, D Baumgart, A Krueck, N Jennerjahn, T 2007 https://doi.org/10.1016/j.marmicro.2007.06.004 http://ecite.utas.edu.au/145756 en eng Elsevier Science Bv http://dx.doi.org/10.1016/j.marmicro.2007.06.004 Mohtadi, M and Max, L and Hebbeln, D and Baumgart, A and Krueck, N and Jennerjahn, T, Modern environmental conditions recorded in surface sediment samples off W and SW Indonesia: planktonic foraminifera and biogenic compounds analyses, Marine Micropaleontology, 65, (1-2) pp. 96-112. ISSN 0377-8398 (2007) [Refereed Article] http://ecite.utas.edu.au/145756 Biological Sciences Ecology Marine and estuarine ecology (incl. marine ichthyology) Refereed Article PeerReviewed 2007 ftunivtasecite https://doi.org/10.1016/j.marmicro.2007.06.004 2021-09-27T22:16:55Z A total of 69 surface sediment samples from several fore-arc basins located west and southwest of the Indonesian Archipelago was analyzed with respect to the faunal composition of planktonic foraminifera, the stable oxygen and carbon isotopic signal of a surface-dwelling ( Globigerinoides ruber ) and a thermocline-dwelling ( Neogloboquadrina dutertrei ) species, and the opal and CaCO 3 contents in bulk sediment. Our results show that the distribution pattern of opal in surface sediments corresponds well to the upwelling-induced chlorophyll concentration in the upper water column and thus, represents a reliable proxy for marine productivity in the coastal upwelling area off S and SW Indonesia. Present-day oceanography and marine productivity are also reflected in the tropical to subtropical and upwelling assemblages of planktonic foraminifera in the surface sediments, which in part differ from previous studies in this region probably due to different coring methods and dissolution effects. The average stable oxygen isotopic values ( δ 18 O) of G. ruber in surface sediments vary between 2.9 and 3.2 from basin to basin and correspond to the oceanographic settings during the SE monsoon (JulyOctober) off west Sumatra, whereas off southern Indonesia, they reflect the NW monsoon (DecemberMarch) or annual average conditions. The δ 18 O values of N. dutertrei show a stronger interbasinal variation between 1.6 and 2.2 and correspond to the upper thermocline hydrology in JulyOctober. In addition, the difference between the shell carbon isotopic values ( δ 13 C) of G. ruber and N. dutertrei (Δ δ 13 C) appears to be an appropriate productivity recorder only in the non-upwelling areas off west Sumatra. Consequently, joint interpretation of the isotopic values of these species is distinctive for different fore-arc basins W and SW of Indonesia and should be considered in paleoceanographic studies. Article in Journal/Newspaper Planktonic foraminifera eCite UTAS (University of Tasmania) Marine Micropaleontology 65 1-2 96 112 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Ecology Marine and estuarine ecology (incl. marine ichthyology) |
spellingShingle |
Biological Sciences Ecology Marine and estuarine ecology (incl. marine ichthyology) Mohtadi, M Max, L Hebbeln, D Baumgart, A Krueck, N Jennerjahn, T Modern environmental conditions recorded in surface sediment samples off W and SW Indonesia: planktonic foraminifera and biogenic compounds analyses |
topic_facet |
Biological Sciences Ecology Marine and estuarine ecology (incl. marine ichthyology) |
description |
A total of 69 surface sediment samples from several fore-arc basins located west and southwest of the Indonesian Archipelago was analyzed with respect to the faunal composition of planktonic foraminifera, the stable oxygen and carbon isotopic signal of a surface-dwelling ( Globigerinoides ruber ) and a thermocline-dwelling ( Neogloboquadrina dutertrei ) species, and the opal and CaCO 3 contents in bulk sediment. Our results show that the distribution pattern of opal in surface sediments corresponds well to the upwelling-induced chlorophyll concentration in the upper water column and thus, represents a reliable proxy for marine productivity in the coastal upwelling area off S and SW Indonesia. Present-day oceanography and marine productivity are also reflected in the tropical to subtropical and upwelling assemblages of planktonic foraminifera in the surface sediments, which in part differ from previous studies in this region probably due to different coring methods and dissolution effects. The average stable oxygen isotopic values ( δ 18 O) of G. ruber in surface sediments vary between 2.9 and 3.2 from basin to basin and correspond to the oceanographic settings during the SE monsoon (JulyOctober) off west Sumatra, whereas off southern Indonesia, they reflect the NW monsoon (DecemberMarch) or annual average conditions. The δ 18 O values of N. dutertrei show a stronger interbasinal variation between 1.6 and 2.2 and correspond to the upper thermocline hydrology in JulyOctober. In addition, the difference between the shell carbon isotopic values ( δ 13 C) of G. ruber and N. dutertrei (Δ δ 13 C) appears to be an appropriate productivity recorder only in the non-upwelling areas off west Sumatra. Consequently, joint interpretation of the isotopic values of these species is distinctive for different fore-arc basins W and SW of Indonesia and should be considered in paleoceanographic studies. |
format |
Article in Journal/Newspaper |
author |
Mohtadi, M Max, L Hebbeln, D Baumgart, A Krueck, N Jennerjahn, T |
author_facet |
Mohtadi, M Max, L Hebbeln, D Baumgart, A Krueck, N Jennerjahn, T |
author_sort |
Mohtadi, M |
title |
Modern environmental conditions recorded in surface sediment samples off W and SW Indonesia: planktonic foraminifera and biogenic compounds analyses |
title_short |
Modern environmental conditions recorded in surface sediment samples off W and SW Indonesia: planktonic foraminifera and biogenic compounds analyses |
title_full |
Modern environmental conditions recorded in surface sediment samples off W and SW Indonesia: planktonic foraminifera and biogenic compounds analyses |
title_fullStr |
Modern environmental conditions recorded in surface sediment samples off W and SW Indonesia: planktonic foraminifera and biogenic compounds analyses |
title_full_unstemmed |
Modern environmental conditions recorded in surface sediment samples off W and SW Indonesia: planktonic foraminifera and biogenic compounds analyses |
title_sort |
modern environmental conditions recorded in surface sediment samples off w and sw indonesia: planktonic foraminifera and biogenic compounds analyses |
publisher |
Elsevier Science Bv |
publishDate |
2007 |
url |
https://doi.org/10.1016/j.marmicro.2007.06.004 http://ecite.utas.edu.au/145756 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
http://dx.doi.org/10.1016/j.marmicro.2007.06.004 Mohtadi, M and Max, L and Hebbeln, D and Baumgart, A and Krueck, N and Jennerjahn, T, Modern environmental conditions recorded in surface sediment samples off W and SW Indonesia: planktonic foraminifera and biogenic compounds analyses, Marine Micropaleontology, 65, (1-2) pp. 96-112. ISSN 0377-8398 (2007) [Refereed Article] http://ecite.utas.edu.au/145756 |
op_doi |
https://doi.org/10.1016/j.marmicro.2007.06.004 |
container_title |
Marine Micropaleontology |
container_volume |
65 |
container_issue |
1-2 |
container_start_page |
96 |
op_container_end_page |
112 |
_version_ |
1766169700476125184 |