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Benthic foraminiferal response to orbital-scale variability in primary productivity off the Portuguese margin over the last 1.3 Myr
Guo, Qimei(郭启梅)1,2; Kim, Jin-Kyoung3; Singh, Arun D.4; Yu, Jing5; Li, Baohua(李保华)1,2,3
2021-09-01
Source PublicationPALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
Volume577Pages:13
Abstract

Detailed analyses of benthic foraminiferal fauna and planktonic foraminiferal stable carbon isotopes at IODP Site U1391 were performed to reconstruct orbital-scale variability in primary productivity off the Portuguese margin over the last 1.3 Myr. Q-mode factor analysis of benthic foraminiferal census data from the >250 mu m fraction reveals four assemblages, which is mainly controlled by the organic matter flux to the seafloor deriving from surface water productivity. The Sphaeroidina bulloides assemblage accounts for nearly half of the total variance, consisting of S. bulloides, the agglutinated taxa and Lenticulina as major components and Cibicidoides robertsonianus, Planulina ariminensis and Uvigerina peregrina parva as subsidiary species. Cibicidoides wuellerstorfi and Bulimina mexicana are important accessory species of the Cibicidoides pachyderma-dominated assemblage. The miliolids assemblage is dominated by miliolids and B. mexicana with Uvigerina mediterranea as the important associated species. The Praeglobobulimina ovata assemblage is represented by P. ovata along with Globobulimina affinis, Melonis pompiloides, Melonis barleeanum and U. peregrina parva as important accessory species. High productivity often occurs during the interglacial stages and is characterized by the S. bulloides assemblage with subsidiary P. ovata assemblage, while low productivity often occurs during the glacial stages and is marked by the miliolids assemblage and the C. pachyderma assemblage. In addition to the distinct glacial/interglacial variations, there is a long-term decreasing trend in primary productivity recorded by benthic foraminifera, which is supported by a broadly increasing trend in the sediment redness (a*). Continuous wavelet analysis of high productivity-related Factor 1 loading (the S. bulloides assemblage) suggests that variations in primary productivity have a middle Pleistocene transition (MPT)-related shift in cyclicity from the similar to 41-kyr dominant cycle prior to the MPT to the similar to 100-kyr dominant cycle after the MPT. Cross-spectral analyses between the Factor 1 loading record and delta O-18 of Globigerina bulloides reveal the control of global ice volume changes on primary productivity. The high coherency between the Factor 1 loading record and delta C-13 of G. bulloides on the glacial/interglacial timescale suggests that primary productivity off the Portuguese margin may be largely affected by nutrient availability which was related to the Iberian surface hydrographic changes associated with changes in global ice volume.

KeywordBenthic foraminiferal turnover Surface water productivity Western Iberian margin Middle-to-late Pleistocene High-latitude forcing
DOI10.1016/j.palaeo.2021.110532
Indexed BySCI
Language英语
WOS KeywordMEDITERRANEAN OUTFLOW WATER ; SURFACE OCEAN PRODUCTIVITY ; WESTERN IBERIAN MARGIN ; NORTH-ATLANTIC ; CONTINENTAL-MARGIN ; EARLY-PLEISTOCENE ; DISSOLVED-OXYGEN ; STABLE-ISOTOPE ; GULF ; DEEP
Funding ProjectChinese Academy of Sciences (CAS) Strategic Priority Project[XDB26000000] ; National Natural Science Foundation of China[41276044] ; National Natural Science Foundation of China[41776073] ; National Natural Science Foundation of China[41806069] ; State Key Laboratory of Palaeobiology and Stratigraphy[20182104] ; Ministry of Ocean and Fisheries Korea
WOS Research AreaPhysical Geography ; Geology ; Paleontology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS IDWOS:000678383100009
Funding OrganizationChinese Academy of Sciences (CAS) Strategic Priority Project ; National Natural Science Foundation of China ; State Key Laboratory of Palaeobiology and Stratigraphy ; Ministry of Ocean and Fisheries Korea
PublisherELSEVIER
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/38466
Collection中国科学院南京地质古生物研究所
Corresponding AuthorLi, Baohua(李保华)
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, 39 East Beijing Rd, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, 39 East Beijing Rd, Nanjing 210008, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
4.Banaras Hindu Univ, Ctr Adv Study Geol, Varanasi 221005, Uttar Pradesh, India
5.Jiangxi Bur Geol & Mineral Resources, Jiujiang 332000, Peoples R China
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Guo, Qimei,Kim, Jin-Kyoung,Singh, Arun D.,et al. Benthic foraminiferal response to orbital-scale variability in primary productivity off the Portuguese margin over the last 1.3 Myr[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2021,577:13.
APA Guo, Qimei,Kim, Jin-Kyoung,Singh, Arun D.,Yu, Jing,&Li, Baohua.(2021).Benthic foraminiferal response to orbital-scale variability in primary productivity off the Portuguese margin over the last 1.3 Myr.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,577,13.
MLA Guo, Qimei,et al."Benthic foraminiferal response to orbital-scale variability in primary productivity off the Portuguese margin over the last 1.3 Myr".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 577(2021):13.
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