Grãos de pólen de angiospermas do Holoceno (7908±30 anos AP-atual) da Planície Costeira sul-catarinense, Brasil

Abstract

RESUMO(Grãos de pólen de angiospermas do Holoceno (7908±30 anos AP-atual) da Planície Costeira sul-catarinense, Brasil). Este trabalho apresenta as descrições palinotaxonômicas, a partir da análise palinológica de sedimentos de duas seções turfáceas na Planície Costeira sul do estado de Santa Catarina, nos municípios de Santa Rosa do Sul e São João do Sul. Uma amostra da porção basal dos testemunhos foi datada em ( 14 C) em 7908±33 anos AP para Santa Rosa do Sul e 7817±41 anos AP para São João do Sul, ambos referente ao Holoceno inferior. Foram descritos 62 tipos de grãos de pólen relacionados a 49 famílias de angiospermas atuais, que expressam diferentes habitats e hábitos ecoló-gicos. O presente trabalho juntamente com a primeira parte, que trata das descrições palinotaxonômicas de fungos, criptógamas e outros palinomorfos recuperados de sedimentos, contribui com o reconhecimento da vegetação que abrigava a Planície Costeira sul-catarinense, durante o Holoceno. As análises palinotaxonômicas constituem a base das interpretações paleoambientais e paleoclimáticas neste setor da costa brasileira. Palavras-chave:Descrições polínicas, Quaternário, Holoceno, Planície Costeira, Santa Catarina ABSTRACT (Catalogue of angiosperm pollen from Holocene sediments of the Coastal Plain, Santa Catarina, Brazil). This paper presents palinotaxonomic descriptions, from a pollen analysis of sediments from two cores taken from the southern Coastal Plain of Santa Catarina State (in the municipalities of Santa Rosa do Sul and São João do Sul). A basal sample from the Santa Rosa do Sul and São João do Sul had a 14 C age of 7908±33 and 7817±41 yr BP for the Lower Holocene, respectively. Sixty-two types of pollen grains were described from 49 angiosperm families, which are associated with different habitats and ecological habits. This work is published in association with Part I, which comprises palinotaxonomic descriptions of fungi, cryptogams and other palynomorphs recovered from the sediments, and contributes to the identification of vegetation that occurred on the Coastal Plain of southern Santa Catarina during the Holocene. Palinotaxonomic analyses form the basis of paleoclimatic and paleoenvironmental interpretations in this region of the Brazilian coast.

Paleoenvironmental evolution of the coastal plain of Southern Brazil: palynological data from a Holocene core in Santa Catarina State

“…The Acritarch sp. 2, similar to specimens of the Sphaeromorphitae subgroup, and the specimes assigned to the genera Michrystridium are characteristic of shallow coastal water associations (Montenari andLeppig 2003, Félix andSouza 2012). The genera of dinoflagellate cysts Spiniferites and Operculodinium correspond to gonyaulacoids forms, which have a cosmopolitan character, being recorded in a wide range of environments, from internal neritic to open ocean, revealing tolerance to a large range of salinity, luminosity, nutrients and temperature (de Vernal et al 2001, Marret andZonneveld 2003).…”

“…The core was wrapped in plastic and aluminum film, taken to the laboratory and stored under refrigeration. , Colinvaux et al 1999, Borel and Gómez 2006, Leal and Lorscheitter 2006, Cancelli et al 2012. Percentage diagram and cluster analyses were constructed using the Tilia versions 1.7.16 (Grimm 2011).…”

Forest stability during the Holocene in Santa Catarina, southern Brazil revealed by small mammals from Gruta do Presépio

“…Palynological data from Santa Catarina State are concentrated in coastal plains (e.g. Behling and Negrelle, 2001; Cancelli et al, 2012a, 2012b; Kuhn et al, 2023; Val-Peón et al, 2019). For the highlands, there are studies from Northern Santa Catarina State Plateau (Oliveira et al, 2006), Serra Geral (Behling, 1995) and Serra do Tabuleiro State Park (de Oliveira et al, 2012; Jeske-Pieruschka et al, 2013), all of the sites having altitudes over 850 m. Jeske-Pieruschka et al (2013) pointed out that the dense ombrophilous forest moved from the lowlands over the slopes in the Early Holocene due to warmer and wetter conditions.…”