气候变化领域集成服务门户(CCPortal): Palynological analysis of dental calculus from Pleistocene proboscideans of southern Brazil: A new approach for paleodiet and paleoenvironmental reconstructions

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DOI	10.1016/j.palaeo.2019.109523
	Palynological analysis of dental calculus from Pleistocene proboscideans of southern Brazil: A new approach for paleodiet and paleoenvironmental reconstructions
	Asevedo L.; D'Apolito C.; Misumi S.Y.; Barros M.A.D.; Barth O.M.; Avilla L.D.S.
发表日期	2020
ISSN	0031-0182
卷号	540
英文摘要	The proboscidean Notiomastodon platensis is widely recognized in the Pleistocene of Brazil, but direct evidence for its feeding behavior is scant. In this paper, we report palynological assemblages preserved in dental calculi to infer dietary preferences and habitats. Molar specimens (m1 and M3/m3) with significant calculus accumulation were examined from localities along the Coastal Plain (CPRS) and the Campanha region (western state in Pampa biome) in Rio Grande do Sul state, southern Brazil. Palynomorphs obtained from calculus were identified with light microscopy, and we applied species distribution modelling (SDM) for arboreal/shrub pollen taxa to investigate the environmental contexts for proboscideans during the Last Interglacial (LIG, 120 ka BP) and Last Glacial Maximum (LGM, 21 ka BP). Pollen assemblages indicate a generalist diet for N. platensis, and corroborate previous paleoecological studies. N. platensis from CPRS showed two patterns: the subadult individual was a specialized browser in wooded habitats, inferred from pollen taxa dominated by arboreal species (mainly Myrtaceae), while mature/senile adult individuals were dominantly grazers to mixed-feeders in open habitats inferred from herbaceous pollen (mainly Cyperaceae) mixed with woody elements. For the Campanha region, diet interpretation is difficult due to the absence of pollen; however, Poaceae phytoliths indicate that grasses may have been important food items, notably pooid C3 grasses. N. platensis potentially accessed a more heterogeneous environment with mixed open grasslands and forests around the LIG interval because of the larger extension of forest at the time. Grassland landscapes could have been more foraged by proboscideans around the LGM given the dry and cold climate conditions, which resulted in a northward retraction of forest. © 2019 Elsevier B.V.
英文关键词	Megafauna; Paleoecology; Quaternary; South America; Species distribution modelling
语种	英语
scopus关键词	accumulation; arboreal species; dominance; feeding behavior; fossil assemblage; fossil record; generalist; grassland; Last Glacial Maximum; mammal; paleoecology; tooth; Argentina; Brazil; Campanha; Pampas; Rio Grande do Sul; Cyperaceae; Myrtaceae; Poaceae
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150619
作者单位	Programa de Pós-graduação em Ecologia e Conservação, PPEC, Universidade Federal de Sergipe, São Cristóvão, Av. Marechal Rondon s/n, Jardim Rosa Elze, São Cristóvão, Sergipe 49100-000, Brazil; Laboratório de Paleontologia e Palinologia de Mato Grosso, Faculdade de Geociências, Universidade Federal de Mato Grosso, Av. Fernando Corrêa da Costa 2387, sala 154, Boa Esperança, Cuiabá, Mato Grosso 78060-900, Brazil; Laboratório de Palinologia, Departamento de Geologia, IGEO, Universidade Federal do Rio de Janeiro, Av. Athos da Silveira Ramos 274, Ilha do Fundão - Cidade Universitária, Rio de Janeiro, 21941-916, Brazil; Programa de Pós-Graduação em Geologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil; Laboratório de Mastozoologia, Departamento de Zoologia, Universidade Federal do Estado do Rio de Janeiro, Av. Pasteur 458, sala 501, Rio de Janeiro, 22290-240, Brazil; Programa de Pós-graduação em Ciências Biológicas (Biodiversidade Neotropical), Universidade Federal do Estado do Rio de Janeiro...
推荐引用方式 GB/T 7714	Asevedo L.,D'Apolito C.,Misumi S.Y.,et al. Palynological analysis of dental calculus from Pleistocene proboscideans of southern Brazil: A new approach for paleodiet and paleoenvironmental reconstructions[J],2020,540.
APA	Asevedo L.,D'Apolito C.,Misumi S.Y.,Barros M.A.D.,Barth O.M.,&Avilla L.D.S..(2020).Palynological analysis of dental calculus from Pleistocene proboscideans of southern Brazil: A new approach for paleodiet and paleoenvironmental reconstructions.Palaeogeography, Palaeoclimatology, Palaeoecology,540.
MLA	Asevedo L.,et al."Palynological analysis of dental calculus from Pleistocene proboscideans of southern Brazil: A new approach for paleodiet and paleoenvironmental reconstructions".Palaeogeography, Palaeoclimatology, Palaeoecology 540(2020).