Palinologia de turfas do alto curso do Arroio Cará, Coxilha Rica, Santa Catarina, Brasil

IF 0.7 4区地球科学 Q4 PALEONTOLOGY

Revista Brasileira De Paleontologia Pub Date : 2021-09-26 DOI:10.4072/rbp.2021.3.07

Edenir Bagio Perin, Gisele Leite de Lima Primam, M. A. T. D. Oliveira

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Abstract

Palynology of peaty sediments from the high course of Cará Brook Creek, Coxilha Rica, Santa Catarina, Brazil. This paper presents the results of the palynological study of a sedimentary core collected in a bog in the upper part valley of Cará Brook Creek, in the cultural territory of Coxilha Rica, located in the Campos Gerais Plateau in Santa Catarina, Southern Brazil. The base of the core was dated in 6.900 14C years BP (7,845–7,690 cal years BP). The identification of the palynomorphs and the cluster analysis made possible to define two distinct palynological phases, despite the predominance of grassland vegetation throughout the whole core. From 34 cm, the frequency of bryophytes decreases, accompanied by the increase of the diversity of all vegetal taxa. Throughout the core, the most frequent families are Poaceae, Cyperaceae Apiaceae. The results indicate that the landscape of the upper course of the Brook Creek was characterized by grasslands from 6,900 14C years BP under a regional and humid climate, with a temperature increase in the historical period. Keywords: Middle Holocene, palynomorphs, grasslands, Araucaria forest, Highland.

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Arroio Cará，Coxilha Rica，Santa Catarina，巴西高地泥炭的Paliology

巴西圣卡塔琳娜省Coxilha Rica CaráBrook Creek高地泥炭沉积物的Palynology。本文介绍了在巴西南部圣卡塔琳娜Campos-Gerais高原的Coxilha Rica文化区CaráBrook Creek上游山谷沼泽中采集的沉积岩心的孢粉学研究结果。岩心底部的年代为6.900 14C年BP（7845–7690 cal年BP）。尽管整个核心地带的草原植被占主导地位，但对孢粉形态的鉴定和聚类分析使确定两个不同的孢粉学阶段成为可能。从34厘米开始，苔藓植物的频率降低，同时所有植物类群的多样性增加。纵观整个核心，最常见的科有蒲科、莎草科、Apiaceae。研究结果表明，在区域性湿润气候条件下，从公元6900年到公元14世纪，布鲁克溪上游的景观以草原为特征，历史时期气温升高。关键词：全新世中期，坡缕石，草原，南洋杉林，高地。

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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.