A Check-List on the Invasive Species of Forestry Plantations in Lower Amazon, Nw.

Abstract

RESUMOFoi feito um levantamento das plantas invasoras ocorrentes durante os primeiros seis meses de plantações florestais em segunda e terceira rotação, na região do Jari, NW Pará.A lista resultante mostrou dois tipos de plantas invasoras: (1) plantas daninhas propriamente ditas -aquelas espécies cosmopolitas típicas de ambientes perturbados; e (2) espécies pioneiras -aquelas prováveis remanescentes da vegetação original da área estudada.

Ferns and lycophytes from Serra dos Carajás, an Eastern Amazonian mountain range

“…In the state of Pará, until the beginning of last decade, little was known about the composition of the fern and lycophyte flora, besides the pioneering studies of Huber (1898Huber ( , 1902Huber ( , 1906, Sampaio (1930), Cain et al (1956) and Pires (1992). However, from 2003 on, there was a great advance in the knowledge about seedless vascular plants in Pará state due to several floristic and taxonomic studies carried out in forest fragments located around the state capital, Belém (Rodrigues et al 2004;Costa et al 2006;Costa & Pietrobom 2007Maciel et al 2007;Ferreira et al 2009;Miranda 2009;Silva 2009), and also in Castanhal (Tavares 2009), Tomé-Açu (Maciel 2008;Maciel & Pietrobom 2010a,b), Portel (Silva & Rosário 2008;Pietrobom et al 2009), Salgado (Costa 2009), Tucuruí (Fernandes et al 2012), Redenção (Fonseca 2010), Monte Alegre (Silva 2010), and in the protected areas of "Calha Norte" (Góes-Neto 2011), as well as new records and other studies (Góes-Neto & Pietrobom 2012a,b;Almeida & Salino 2015;Pallos et al 2016), which have contributed significantly to improve the knowledge on the fern and lycophyte flora in Pará and in the Amazon region.…”