Assessment of a subtropical riparian forest focusing on botanical, meteorological, ecological characterization and chemical analysis of rainwater

  • Vanessa Graeff Universidade FEEVALE (FEEVALE), Novo Hamburgo, RS, Brasil Programa de Pós-Graduação em Qualidade Ambiental (PPGQA)
  • Ivi Galetto Mottin Universidade FEEVALE (FEEVALE), Novo Hamburgo, RS, Brasil Programa de Pós-Graduação em Qualidade Ambiental (PPGQA)
  • Ledyane Rocha-Uriartt Universidade FEEVALE (FEEVALE), Novo Hamburgo, RS, Brasil Programa de Pós-Graduação em Qualidade Ambiental (PPGQA)
  • Daniela Montanari Migliavacca Osório Universidade FEEVALE (FEEVALE), Novo Hamburgo, RS, Brasil Programa de Pós-Graduação em Qualidade Ambiental (PPGQA)
  • Jairo Lizandro Schmitt Universidade FEEVALE (FEEVALE), Novo Hamburgo, RS, Brasil Programa de Pós-Graduação em Qualidade Ambiental (PPGQA)
Keywords: ecological characterization, environmental analysis, epiphytic ferns, rainwater

Abstract

Riparian forests are heterogeneous environments, in which epiphytes find ideal conditions to develop. These plants absorb the necessary nutrients for survival from the atmosphere, and their occurrence and distribution can be influenced by the quality and quantity of precipitation. The objective of this research was to perform an integrated analysis of botanical, meteorological and chemical precipitation parameters so as to compare them in fragments of the riparian forest in the lower (São Leopoldo-SL) and upper (Caraá-CA) stretches of the Rio dos Sinos Hydrographic Basin (RSHB), RS, Brazil. Rainwater was chemically analyzed, the community structure of epiphytic ferns was surveyed and the ecological characterization was evaluated through the Rapid Habitat Assessment Protocol (RHAP). The results showed that the chemical composition of rainwater is influenced by the environment of each area. In the upper stretch (CA), for instance, the main contribution is that of marine ions, while in the lower stretch (SL), the most impacting aspects are urbanization and industrialization. Similarly, the results depict a reduction of richness and a simplification of the community structure of epiphytic ferns and their environmental quality according to the RHAP categories, towards the base level of the RSHB. The integrated analysis, in which different methods were applied, proved to be an efficient tool to evaluate environmental quality. This analysis considers that a greater number of biotic and abiotic variables may be applied in different scenarios.


Published
09/04/2018
Section
Papers