Modern pollen rain analysis from Itapuã State Park (Parque Estadual Itapuã), RS, Brazil

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 fi elds vegetation, coastal forest, "vassoural," mixed grassland, moist, bathed and juncal plains. Artifi cial pollen traps were installed inside the park, between forest and human-modifi ed fi eld. 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of 34 plant families, represented by 47 different pollen grains and monilophyte spores (including exotic taxa), unpublished data for the park's palinofl ora. 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 nonarboreal pollen grains. Non-arboreal pollen grains, especially Poaceae, dominated in all the traps, even those located in forest areas. The dominance of the human-modifi ed fi elds around collectors and winds from the northeast infl uenced 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.

Representation of the Hyrcanian forest (northern Iran) in modern pollen rain revealed by palynological and DNA-metabarcoding data

“…Modern pollen rain studies are providing important data with different aims, such as generating environmental and paleoenvironmental parameters or providing insight in the current plant diversity of the area. Furthermore, modern pollen rain data can be used in studies related to paleogeographic reconstruction, allergic diseases (hay fever) and occurrence of plant communities in a region (Gomes et al, 2021).…”

Long-term vegetation dynamics along altitudinal and longitudinal gradients in the Hyrcanian forest region (northern Iran)

“…Modern pollen rain studies are providing important data with different aims such as generating environmental and paleoenvironmental parameters or providing inside in the current plant diversity of the area. Furthermore, the modern pollen rain data can be used in studies related to paleogeographic studies, allergic diseases (hay fever), and occurrence of plant communities in a region (Gomes et al, 2021).…”