Abstract
Itapuã State Park is located in the municipality of Viamão, between the 30º 20 'and 30º 27' S and between 50º 50' and 51º 05' W, in the state of Rio Grande do Sul, southern Brazil. The Park is one of the state conservation units, maintaining remnants of the Atlantic forest, rocky fields vegetation, coastal forest, "vassoural," mixed grassland, moist, bathed and juncal plains. Artificial pollen traps were installed inside the park, between forest and human-modified field. The study presents a morphological description of 34 plant families, represented by 47 different pollen grains and monilophyte spores (including exotic taxa), unpublished data for the park's palinoflora. Quantitative data revealed the presence of 77% of non-arboreal pollen grains, 20% of arboreal pollen grains, 2% of monilophyte spores and 1% of other that can be both arboreal and non-arboreal pollen grains. Non-arboreal pollen grains, especially Poaceae, dominated in all the traps, even those located in forest areas. The dominance of the human-modified fields around collectors and winds from the northeast influenced the dispersion of these grains. Exotic pollen grains of the Betulaceae family, of Andean origin, also occurred in the pollen rain, resulting from dispersion by atmospheric currents of long distances.
Highlights
Pollen analysis is an excellent tool for studying reconstitutions of paleoenvironments and paleoclimates, especially when associated with isotopic dating methods
This study presents the results of modern pollen rain analysis in the Itapuã State Park, in the municipality of Viamão, in the State of Rio Grande do Sul aiming to provide new data for palinoflora and pollen diversity in an area that involves different physiognomies and types of vegetation
The Itapuã State Park is located in the municipality of Viamão in the State of Rio Grande do Sul, it has a total area of 5,566.50ha and it is located about 57km from the centre of Porto Alegre
Summary
Pollen analysis is an excellent tool for studying reconstitutions of paleoenvironments and paleoclimates, especially when associated with isotopic dating methods. Descriptions and illustrations of modern palynomorphs and their ecological correlations are fundamental resources capable of providing comparisons with elements in the environmental and paleoenvironmental register. Modern pollen rain analysis is important because as well as providing parameters for environmental and/or paleoenvironmental studies, it generates data about the current pollen diversity of an area, and may support studies related to allergic diseases (hay fever), paleoecological, paleogeographic and paleoclimatic data and to the dynamics of plant communities in a region. In Brazil, there is still little data on modern pollen rain analysis, highlighting studies by, Silva (2002) for the mangroves in the Northeast, Behling & Negrelle (2006) for the Atlantic forest in Paraná, Chaves (2013) for the National Park Serra da Capivara (Piauí), Guimarães et al (2017) for the Amazon rain forest and Silva et al (2017) for the State Park Itutinga-Pilões (São Paulo).
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
