第一个第四纪巴西洞穴花粉记录：形态描述、分类和生态数据

IF 0.7 4区地球科学 Q4 PALEONTOLOGY

Revista Brasileira De Paleontologia Pub Date : 2020-07-14 DOI:10.4072/rbp.2020.1.02

Aline Goncalves de Freitas, V. Gonçalves-Esteves, C. B. Mendonça, S. Fernández, J. Carrión

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引用次数: 1

摘要

本文介绍了从巴西北部托坎廷斯州Gruta do Urso洞穴第四纪沉积物中回收的被子植物花粉粒的描述、分类和生态数据。在回收的花粉中，鉴定出44种被子植物花粉。这里描述的大多数花粉类型与塞拉多生物群落植物群落中目前存在的现代土著灌木和草本亚灌木分类群有关：（i）森林形成（番荔枝科、蜘蛛目、冬青属、塞尔蒂斯属、银耳属、Tournefortia、Protium、Combretaceae Melamortaceae类型、Croton类型、Moraceae Urticaceae类型，参见。紫荆属（Bauhinia shortipes）、决明子属（Cassia）、皮氏菌属（Pithecellobium）、洋地黄属（Peixodoa）和雪松属（Cedrela）；（ii）稀树草原形成（Anacardium、Astronium、Astraceae Trib Eupatorieae、Caryocar、莎草科、Erioteca型、Ludwigia、Pseudobombax spp.、Ouratea、Qualea和Utricularia），以及（iii）草原（Poceae）。关于登记的花粉类型的多样性，最具代表性的植物科是：蚕豆科（8）、锦葵科（4）、大戟科（3）、Anacardiaceae（3），夹竹桃科（2）、大麻科（2。花粉数据显示了最后一次冰川盛期和全新世洞穴外的古植被，为古生态、古环境和古气候调查提供了可靠的来源。关键词：孢粉学，第四纪，古植被，巴西稀树草原。本文介绍了从巴西北部托坎廷斯州乌尔索岛第四纪沉积物中发现的被子植物花粉粒的形态描述、分类和生态数据。记录了与目前出现在塞拉多生物群落植被群落中的灌木-树木和灌木-草本分类单元相关的44种花粉类型：（i）森林形成（番荔枝科、蜘蛛目、冬青属、塞尔蒂斯属、银耳属、Tournefortia、Protium、Combretaceae Melamortaceae型、Croton型、Moraceae Urticaceae型，参见。紫荆属（Bauhinia shortipes）、决明子属（Cassia）、皮氏菌属（Pithecellobium）、洋地黄属（Peixodoa）和雪松属（Cedrela）；（ii）严格意义上的cerrado（Anacardium、Astronium、Astraceae Tribe Eupatorieae、Caryocar、莎草科、Erioteca型、Ludwigia、Pseudobombax spp.、Ouratea、Qualea和Utricularia）和（iii）禾本科（Poceae）。最具代表性的植物科是蚕豆科（8）、锦葵科（4）、大戟科（3。Polynic数据反映了Ultimo Maximo冰川和全新世洞穴周围的古植被，是古生态、古环境和古气候调查的可靠来源。关键词：孢粉学，第四纪，古植被，塞拉多。

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First Quaternary Brazilian cave pollen record: morphological descriptions, taxonomic and ecological data

This paper presents descriptions, and taxonomic and ecological data by the angiosperm pollen grains recovered from Quaternary sediments of the Gruta do Urso Cave, Tocantins State, Northern Brazil. Among recovered assemblage, 44 types of angiosperm pollen were identified. Most of the pollen types described here are related to the modern aboreal-shrub and herbaceous-subshrub taxa currently present in the plant communities of the Cerrado biome: (i) forest formations (Annonaceae, Aspidosperma, Ilex, Celtis, Trema, Tournefortia, Protium, Combretaceae-Melastomataceae type, Croton-type, Moraceae-Urticaceae type, cf. Bauhinia brevipes, Cassia, Pithecellobium, Peixotoa, and Cedrela); (ii) savannah formations (Anacardium, Astronium, Asteraceae Tribu Eupatorieae, Caryocar, Cyperaceae, Eriotheca-type, Ludwigia, Pseudobombax spp., Ouratea, Qualea, and Utricularia), and (iii) grasslands (Poaceae). Regarding the diversity of pollen types registered, the most representative botanical families were: Fabaceae (8), Malvaceae (4), Euphorbiaceae (3), Anacardiaceae (3), Apocynaceae (2), Cannabaceae (2), Sapindaceae (2) and Poaceae (2), which also occur in the Cerrado-Caatinga transition. Pollen data show paleovegetation during the Last Glacial Maximum and Holocene times out of the cave, and provides a reliable source for paleoecological, paleoenvironmental and paleoclimatic investigations. Keywords: palynology, Quaternary, paleovegetation, Brazilian savannah. Este artigo apresenta as descricoes morfologicas, dados taxonomicos e ecologicos de graos de polen de angiospermas recuperados de sedimentos quaternarios da Gruta do Urso, Estado do Tocantins, Norte do Brasil. Foram registrados 44 tipos polinicos que se relacionam com os taxons arbustivo-arboreos e arbustivo-herbaceos ocorrentes atualmente nas comunidades vegetacionais do bioma Cerrado: (i) formacoes florestais (Annonaceae, Aspidosperma, Ilex, Celtis, Trema, Tournefortia, Protium, Tipo Combretaceae-Melastomataceae, Tipo Croton, Tipo Moraceae-Urticaceae, cf. Bauhinia brevipes, Cassia, Pithecellobium, Peixotoa e Cedrela); (ii) cerrado sensu stricto (Anacardium, Astronium, Asteraceae Tribo Eupatorieae, Caryocar, Cyperaceae, Tipo Eriotheca, Ludwigia, Pseudobombax spp., Ouratea, Qualea e Utricularia) e (iii) gramineas (Poaceae). Quanto a diversidade polinica, as familias botânicas mais representativas foram: Fabaceae (8), Malvaceae (4), Euphorbiaceae (3), Anacardiaceae (3), Apocynaceae (2), Cannabaceae (2), Sapindaceae (2) e Poaceae (2), que tambem ocorrem na transicao dos biomas Cerrado-Caatinga. Os dados polinicos refletem a paleovegetacao do entorno da caverna durante o Ultimo Maximo Glacial e Holoceno, e constituem uma fonte confiavel para as investigacoes paleoecologicas, paleoambientais e paleoclimaticas. Palavras-chave: palinologia, Quaternario, paleovegetacao, Cerrado.

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来源期刊

Revista Brasileira De Paleontologia PALEONTOLOGY-

CiteScore

1.60

自引率

14.30%

发文量

审稿时长

>12 weeks

期刊介绍： It publishes original contributions on all aspects of Paleontology. Papers are written in English, Spanish, or Portuguese and are reviewed by international experts.