Document of bibliographic reference 345473

BibliographicReference record

Type

Bibliographic resource

Type of document

Journal article

BibLvlCode

AS

Title

Biometric and biomass analysis of Quaternary Uvigerinidae (Foraminifera) from the Southern Brazilian continental slope

Abstract

The relative abundance, test size, elongation index, volume, and biomass variations of the Uvigerinidae species were analyzed in 1921 tests from 42 samples of two cores obtained from the continental slope of the Western South Atlantic. Variations in uvigerinid distribution and their test metrics are discussed based on the main climatic and oceanographic changes through the last glacial cycle. The higher dominance of Trifarina angulosa during the interglacial stages suggests that this species is favored by a stronger influence of the warm, nutrient-poor and oxygen-rich North Atlantic Deep Water (NADW), and near-bottom currents. Uvigerinid richness, the number of larger and less elongated tests and the accumulated biomass increased during the glacial stages, when the lower continental slope was more influenced by the Circumpolar Deep Water (CDW) close to the bottom and nutrient-enriched surface waters. In this sense, these biotic descriptors have the potential to be applied as proxies in studies on the paleocirculation and carbon flows to the seafloor through the late Quaternary in the South Atlantic. A regression model was also formulated to convert the test length to the total test volume for Uvigerinidae, which can facilitate data acquisition in future studies, expanding their use as paleoceanographical proxies.

WebOfScience code

https://www.webofscience.com/wos/woscc/full-record/WOS:000697736200005

Bibliographic citation

Santana, B.F.B.B.; Freitas, T.R.; Leonel, J.; Bonetti, C. (2021). Biometric and biomass analysis of Quaternary Uvigerinidae (Foraminifera) from the Southern Brazilian continental slope. Mar. Micropaleontol. 169: 102041. https://dx.doi.org/10.1016/j.marmicro.2021.102041

Topic

Marine

Is peer reviewed

true