Glomospira Acme During the Paleocene-Eocene Thermal Maximum: Response to CaCO3 Dissolution or to Ecological Forces?

Abstract

The Paleocene-Eocene Thermal Maximum (PETM) event at ,55.5 Ma, is characterized by globally elevated temperatures, a negative d 13 C excursion and major biotic changes on land and in the oceans, including the major extinction of deepsea benthic foraminifera.

Variability in climate and productivity during the Paleocene–Eocene Thermal Maximum in the western Tethys (Forada section)

“…High ecological tolerance: occur in environments subjected to rapid changes with fluctuating ecological conditions. Arreguín-Rodríguez et al (2013, Galeotti et al (2004), Kaminski and Gradstein (2005), Kaminski et al (1996), Kuhnt and Collins (1996), Ortiz, 1995), Waśkowska (2011) Haplophragmoides spp.…”

Small-sized <i>Trochammina</i> assemblages in deep-water Eocene flysch deposits (Outer Carpathians, Poland) and their palaeoecological implications

“…In the Carpathian basins post-crisis assemblages are characteristic because they have low taxonomic diversity with numerous small forms of Glomospira, with two species dominating (Jurkiewicz, 1967;Bubik, , 1995bBąk et al, 1997;Waśkowska-Oliwa, 2000;Bąk, 2004;Oszczypko et al, 2005;Cieszkowski et al, 2011;Waśkowska, 2011a;Arreguin-Rodriguez et al, 2013). Glomospira assemblages are usually found in hemipelagic variegated deep-sea deposits (Morgiel & Olszewska, 1981Waśkowska-Oliwa, 2000;Bąk, 2004;Cieszkowski et al, 2004;Bąk & Barwicz-Piskorz, 2005) representing areas of low sedimentation rate (Kaminski et al, 1989).…”

Environmental stress in the northern Tethys during the Paleogene: a review of foraminiferal and geochemical records from the Polish Outer Carpathians

“…Foraminifera in clude taxa that tol er ate a wide range of en vi ron men tal con di tions. The dis tri bu tion of these or gan isms is de ter mined by ox y gen and food avail abil i ties (Gooday, 1990;Kuhnt et al, 1996;Stigter et al, 1998;Heinz et al, 2001;Thomas, 2009, 2013;Arreguín-Rodríguez et al, 2013). The ex tinc tion of spe cial ized forms with mas sive and or na mented tests, which be long to k-strat e gists, and the appear ance of low-ox y gen and acid i fi ca tion tol er ant dwarf r-strat egists can be iden ti fied as an ex am ple of adap tive ra di a tion as soci ated with dras tic eco log i cal changes that took place close to the Maastrichtian-Paleocene, Paleo cene-Eocene and EoceneOligo cene bound aries (MacLeod, 1993;Luciani et al, 2016).…”

“…1). The PETM event (~55.5 Ma) is char ac ter ized by glob ally el e vated tem per a tures and ma jor bi otic changes on land and in the oceans, in clud ing the ex tinc tion of deep-wa ter ben thic foraminifera (Galeotti et al, 2004;Arreguín --Rodríguez et al, 2013). At that time, ma rine plank ton and terres trial or gan isms were sig nif i cantly dif fer en ti ated, while nu merous spe cies of flysch-type as sem blages be came ex tinct Kelly et al, 1998;Kelly, 2002).…”

“…At that time, ma rine plank ton and terres trial or gan isms were sig nif i cantly dif fer en ti ated, while nu merous spe cies of flysch-type as sem blages be came ex tinct Kelly et al, 1998;Kelly, 2002). Ben thic foraminiferal sur vived in ho mo ge neous eutrophic as sem blages in clud ing spe cies of the Glomospira (Biofaces B) biofacies (Kaminski, 2005;Arreguín-Rodríguez et al, 2013;Fig. 1).…”