Musgos (Bryophita) do nordeste Paranaense, Brasil -1. Zona Bragantina, microrregião do Salgado e município de Viseu

Abstract

Neste trabalho foram inventariadas as espécies de musgos que ocorrem nos diferentes tipos de vegetação dos municípios da Zona Bragantina, da Microrregião do Salgado e município de Viseu, todos localizados no Nordeste Paraense. Coletaram-se 632 amostras, que resultaram em 60 espécies e uma variedade, distribuídas em 30 gêneros e 16 famílias. Sematophyllaceae, Calymperaceae e Leucobryaceae destacaram-se em diversidade de espécies e número de ocorrências. Sematophyllum subsimplex (Hedw.) Mitt. e Calymperes lonchophyllum Schwaegr. são as espécies mais abundantes. Os resultados referentes à Microrregião do Salgado são comparados aos encontrados na Zona Bragantina e município de Viseu. Ocorre maior diversidade nas matas primárias, indicando que a substituição delas por vegetação secundária resulta no empobrecimento da diversidade das espécies de musgos.

Richness of Marchantiophyta and Bryophyta in a protected area of the Brazilian Amazon

“…1, the most widely colonized substrate was tree trunk (living or decomposing), supporting data in the literature on tropical forests, in which these are reported to be the substrates most widely used by bryophytes, due to their abundance and ability to retain moisture (Pócs 1982;Richards 1984;Germano & Pôrto 1998). This result was expected, because this pattern was the same as that reported in other studies of bryophytes in the Amazon, including those in northeastern Pará (Santos & Lisboa 2003Lisboa & Santos 2005;Lisboa & Tavares 2008;Ilkiu-Borges et al 2009;Tavares et al 2014).…”

“…The richness found in the Gurupi Biological Reserve was higher than that reported in most studies conducted in the Amazon in northeastern Pará, with the exception of Santos & Lisboa (2003) and Tavares et al (2014). In most of the studies compared in Tab.…”

“…The intermediate classes collectively accounted for 289 occurrences and were represented by four frequent species (6.5%), six constant species (9.7%) and ten infrequent species (16.1%). The predominance of rare species and the abundance of a few species in a site has been documented in tropical forests, for nonvascular plants (Santos & Lisboa 2003Souza & Lisboa 2005;Silva & Pôrto 2007;Alvarenga & Lisboa 2009;Ilkiu-Borges et al 2009) and vascular plants (Gotelli & Simberloff 1987;Collins & Glenn 1990;Rees 1995;Boecken & Shachak 1998;van Rensburg et al 2000).…”

“…), Santos & Lisboa (2003;, Lisboa & Santos (2005), Lisboa & Tavares (2008), Ilkiu-Borges et al (2009) and Tavares et al (2014).…”

“…) However, in a neighboring region that has a similar history of occupation, the northeastern portion of the state of Pará, much of the bryoflora has already been studied (Santos & Lisboa 2003Lisboa & Tavares 2008;Ilkiu-Borges et al 2009;Tavares et al 2014), revealing high species richness, which represents about a third of the bryophytes in the state of Pará.…”