Controls on planktonic foraminifera apparent calcification depths for the northern equatorial Indian Ocean

Autor:	Silvia Spezzaferri, Andres Rüggeberg, Stephanie Stainbank, Erica S. de Leau, Dick Kroon, Jacek Raddatz, Manlin Zhang
Přispěvatelé:	Ganssen, Gerald
Rok vydání:	2019
Předmět:	Salinity 010504 meteorology & atmospheric sciences Marine and Aquatic Sciences Water Columns Foraminifera 010502 geochemistry & geophysics Oceanography 01 natural sciences Physical Chemistry Geographical Locations Water column Oceans ddc:550 ddc:630 Indian Ocean Deep chlorophyll maximum Minerals Multidisciplinary biology Calcite Temperature Calcinosis Eukaryota Plankton Mineralogy Chemistry Physical Sciences Medicine Geology Environmental Monitoring Research Article Calcium Isotopes Asia δ18O Science Species Specificity Indian Ocean Islands Sea Water Animals 14. Life underwater Ecosystem 0105 earth and related environmental sciences Ecology and Environmental Sciences Organisms Biology and Life Sciences Aquatic Environments Bodies of Water biology.organism_classification Invertebrates Marine Environments Sea surface temperature Light intensity Geochemistry Chemical Properties People and Places Maldives Earth Sciences Thermocline
Zdroj:	PLoS ONE PLoS ONE, Vol 14, Iss 9, p e0222299 (2019) Stainbank, S, Kroon, D, Raddatz, J, de Leau, E, Zhang, M, Spezzaferri, S & Rüggeberg, A 2019, ' Controls on planktonic foraminifera apparent calcification depths for the northern equatorial Indian Ocean ', PLoS ONE . https://doi.org/10.1371/journal.pone.0222299
ISSN:	1932-6203
Popis:	Within the world’s oceans, regionally distinct ecological niches develop due to differences in water temperature, nutrients, food availability, predation and light intensity. This results in differences in the vertical dispersion of planktonic foraminifera on the global scale. Understanding the controls on these modern-day distributions is important when using these organisms for paleoceanographic reconstructions. As such, this study constrains modern depth habitats for the northern equatorial Indian Ocean, for 14 planktonic foraminiferal species (G. ruber, G. elongatus, G. pyramidalis, G. rubescens, T. sacculifer, G. siphonifera, G. glutinata, N. dutertrei, G. bulloides, G. ungulata, P. obliquiloculata, G. menardii, G. hexagonus, G. scitula) using stable isotopic signatures (δ18O and δ13C) and Mg/Ca ratios. We evaluate two aspects of inferred depth habitats: (1) the significance of the apparent calcification depth (ACD) calculation method/equations and (2) regional species-specific ACD controls. Through a comparison with five global, (sub)tropical studies we found the choice of applied equation and δ18Osw significant and an important consideration when comparing with the published literature. The ACDs of the surface mixed layer and thermocline species show a tight clustering between 73–109 m water depth coinciding with the deep chlorophyll maximum (DCM). Furthermore, the ACDs for the sub-thermocline species are positioned relative to secondary peaks in the local primary production. We surmise that food source plays a key role in the relative living depths for the majority of the investigated planktonic foraminifera within this oligotrophic environment of the Maldives and elsewhere in the tropical oceans.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b3f029e8ce4b29e747cae1986b1ac28c https://pubmed.ncbi.nlm.nih.gov/31513624 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.