Modern planktic foraminifera

Schiebel, Ralf; Hemleben, Christoph

doi:10.1007/bf03021758

Cited by 209 publications

(149 citation statements)

References 80 publications

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“…ap peared abruptly, re flect ing rapid warm ing or the in flux of warm-wa ter masses to the Carpathian Foredeep. Both warm-wa ter gen era are symbiont-bear ing, shal low-dwellers oc cur ring in sub trop i cal and trop i cal ar eas (Bé, 1977;Reynolds and Thunell, 1985;Hemleben et al, 1989;Schiebel and Hemleben, 2005). The co-ex is tence of these two gen era may be ex plained us ing a Ca rib bean ex am ple: Globigerinoides spp.…”

Section: Interpretation Of Palaeoenvironmentmentioning

confidence: 99%

Recostruction of the unusual Mid Miocene (Badenian) palaeoenvironment of the Carpathian Foredeep (Lomnice/Tišnov denudational relict, Czech Republic)

Holcová

Brzobohatý

Kopecká

et al. 2015

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Multiproxy sedimentological, gamma-spec tro met ric, foraminiferal, cal car e ous nannoplankton, and otolith data were used for the re con struc tion of the Badenian (Mid dle Mio cene) his tory of the Moravian part of the Carpathian Foredeep. The study mate rial orig i nated from the new bore hole LOM-1, which drilled >20 metres of mo not o nous clayey siltstones with ex cep tion ally rich and well-pre served microfossil as sem blages. Dis tal parts of the Carpathian Foredeep (a forebulge depozone) are exposed in this suc ces sion. Gen er ally, a quiet en vi ron ment of outer shelf to up per bathyal of mo not o nous clayey silts was in terpreted, which is typ i cal for the prox i mal parts of a pe riph eral fore land ba sin. The sec tion stud ied can be sub di vided into six in ter vals, con firm ing the cy cli cal char ac ter of Mid dle Mio cene sed i men ta tion in the Cen tral Paratethys. Interannual os cil lations of nu tri ent con tent, tem per a ture and/or sa lin ity are in ter preted based on the os cil la tions of geo chem i cal as well as palaeo bio logi cal data. The turn over con nected with the ini ti a tion of the Mid dle Mio cene Cli ma tic Tran si tion is re corded above the LO (last oc cur rence) of Helicosphaera waltrans in agree ment with pre vi ous ob ser va tions in the Carpathian Foredeep. The changes in clude cool ing, a de crease in nu tri ents, a prob a ble in crease of the sa lin ity of sur face wa ter, and in crease of sea son al ity. Sea son al ity was man i fested by an al ter na tion of mixed and strat i fied wa ter col umns with a sea sonal in put of nutri ents. Con cern ing nu tri ents, sources of sea sonal riverine in put or sea sonal upwelling are both pos si ble.

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Section: Interpretation Of Palaeoenvironmentmentioning

confidence: 99%

Recostruction of the unusual Mid Miocene (Badenian) palaeoenvironment of the Carpathian Foredeep (Lomnice/Tišnov denudational relict, Czech Republic)

Holcová

Brzobohatý

Kopecká

et al. 2015

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“…We therefore argue that B. variabilis/S. globigerus most likely behaves like many other nonspinose planktic species in the open ocean, where juvenile stages calcify near the surface and adult chambers lower in the water column (9,24). More observations are clearly needed to fully understand the ecology, life cycle and geographic distribution of this distinctive species.…”

Section: Resultsmentioning

confidence: 93%

“…Such a lifestyle is known from diatoms, but until now has never been documented for foraminifera. Tychopelagic forms may well evolve into true pelagic forms: The fossil record shows convincingly that biserials are particularly abundant in the planktic foraminiferal assemblage at some time intervals, with isotopic as well as distributional evidence suggesting that they were truly pelagic forms, reproducing in situ (8,9,(28)(29)(30)(31). The tychopelagic mode of life differs fundamentally from that of the few documented meroplanktic benthics such as Tretomphalus (32), a generic name used for individuals of the genus Rosalina, which at a specific, late stage in their life cycle form a floating chamber containing gametes (32,33).…”

Section: Resultsmentioning

confidence: 99%

“…All survivor species have been described as living predominantly in coastal, relatively shallow waters (nerito-plankton) (4,5,8), and as being relatively rare in the more typical pelagic open ocean domain of planktic foraminifera (2,4,5). Biserial planktic foraminifera are intermittently abundant in fossil assemblages throughout the Upper Cretaceous and much of the Cenozoic (2)(3)(4)(5)8), with 2 biserial species, Streptochilus globigerus and Streptochilus globulosus living in the present oceans (9) [supporting information (SI) Text]. Their spatial and temporal distributions are poorly known, because of their sporadic stratigraphic and geographic occurrences and because they occur in the rarely studied small size fraction (63-125 m).…”

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confidence: 99%

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Surviving mass extinction by bridging the benthic/planktic divide

Darling

Thomas

Kasemann

et al. 2009

Proc. Natl. Acad. Sci. U.S.A.

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Evolution of planktic organisms from benthic ancestors is commonly thought to represent unidirectional expansion into new ecological domains, possibly only once per clade. For foraminifera, this evolutionary expansion occurred in the Early-Middle Jurassic, and all living and extinct planktic foraminifera have been placed within 1 clade, the Suborder Globigerinina. The subsequent radiation of planktic foraminifera in the Jurassic and Cretaceous resulted in highly diverse assemblages, which suffered mass extinction at the end of the Cretaceous, leaving an impoverished assemblage dominated by microperforate triserial and biserial forms. The few survivor species radiated to form diverse assemblages once again in the Cenozoic. There have, however, long been doubts regarding the monophyletic origin of planktic foraminifera. We present surprising but conclusive genetic evidence that the Recent biserial planktic Streptochilus globigerus belongs to the same biological species as the benthic Bolivina variabilis, and geochemical evidence that this ecologically flexible species actively grows within the open-ocean surface waters, thus occupying both planktic and benthic domains. Such a lifestyle (tychopelagic) had not been recognized as adapted by foraminifera. Tychopelagic are endowed with great ecological advantage, enabling rapid recolonization of the extinction-susceptible pelagic domain from the benthos. We argue that the existence of such forms must be considered in resolving foraminiferal phylogeny.end-Cretaceous ͉ foraminifera ͉ Mg/Ca ͉ plankton evolution ͉ SSU rRNA

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“…Ac cord ingly, the plank tonic foraminifera morphospecies have been grouped into broadly de fined cat e go ries based on ecologic crite ria, i.a. by Bé and Tolderlund (1971), Bé (1977), Bé and Hutson (1977), Bolto vskoy et al (1996), Simstich et al (2003), Schiebel and Hemleben (2005) and Wilke et al (2009). The ba sic hydro graphy in di ces of en vi ron ment are ex pressed in the stud ied ma te rial by the pro por tion of these cat e go ries (groups of taxa).…”

Section: Introductionmentioning

confidence: 99%

Coiling direction in Middle Miocene globorotaliids (Foraminiferida) – a case study in the Paratethys (Upper Silesia Basin, Poland)

Gonera

2018

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The pa per deals with sub-evaporite Badenian de pos its (Mid dle Mio cene, Paratethys) that dis play a sud den ap pear ance of globorotaliid taxa show ing pref er ences in the tax o nomic set and coil ing di rec tion. An in ter val of sinistrally coiled Jenkinsella mayeri with pro por tion ally coiled Globoconella bykovae is at the bot tom of the stud ied se quence. It is fol lowed by an in ter val of pro por tion ally coiled Jenkinsella transsylvanica. Pro por tion ally coiled Globoconella bykovae with a small num ber of propor tion ally coiled Jenkinsella transsylvanica are at the top of the Moravian (CPN 7) substage (Orbulina suturalis alias Lagenidae Zone). The sub-evaporite part of the Wielician (CPN 8) substage (Uvigerina costai alias Spiroplectammina Zone) be gan with a globorotaliid-bar ren in ter val (IIC biozone). It is fol lowed by biozone IID dis play ing three globorotallid peaks amongst globorotallid-bar ren de pos its. Only globoconellas are pres ent in all these three events. Pro por tion ally coiled Globoconella bykovae ap peared first. It is fol lowed by pro por tion ally coiled Globoconella minoritesta and sinistrally coiled Globoconella bykovae at the end of the biozone IID. Coil ing pref er ences of globorotaliids have been com pared to changes in the hy dro graphic re gime un fold ing dur ing the CPN 7 and CPN 8 in the stud ied area of the Paratethys. The study dis cov ers that the coil ing of globorotaliids re sponded se lec tively to the hy dro graphic changes. Globoconella bykovae is highly op por tunis tic and can tol er ate con sid er able tem per a ture changes. Spec i mens of this taxon per sist to coil pro por tion ally dur ing the sub-evaporite Badenian, ex cept for the shift to sinistral coil ing just prior to the Wielician evaporites. Sinistrally coiled Jenkinsella mayeri is the most sen si tive to hy dro graphic changes. This taxon re treated at the on set of the tem per a ture drop dur ing the mid-Moravian cryp tic cool ing. This cool ing is marked by the new jenkinsellid oc cur rence -pro por tion ally coiled Jenkinsella transsylvanica. Pro por tion ally coiled Globoconella minoritesta is pres ent in the mid dle of the IID globorotaliid peaks. The globorotaliid coil ing data, pre sented in this pa per, has been cal i brated to the global stra tig ra phy. The in te grated data (foraminifera, nannofossils, ox y gen and car bon sta ble iso topes, ra dio met ric mea sure ments) sup ports the view that the CPN 7/CPN 8 bound ary is co eval to the Langhian/Serravalian one. In the Pol ish part of the Carpathian Foredeep, the boundary runs within the Skawina For ma tion.

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Modern planktic foraminifera

Cited by 209 publications

References 80 publications

Recostruction of the unusual Mid Miocene (Badenian) palaeoenvironment of the Carpathian Foredeep (Lomnice/Tišnov denudational relict, Czech Republic)

Recostruction of the unusual Mid Miocene (Badenian) palaeoenvironment of the Carpathian Foredeep (Lomnice/Tišnov denudational relict, Czech Republic)

Surviving mass extinction by bridging the benthic/planktic divide

Coiling direction in Middle Miocene globorotaliids (Foraminiferida) – a case study in the Paratethys (Upper Silesia Basin, Poland)

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