Levantamento florístico das comunidades de macroalgas da bacia do Rio das Pedras, região centro-sul do estado do Paraná, sul do Brasil

Abstract

-(Floristic survey of macroalgal of the Pedras River Basin, mid-southern region of Paraná State, Southern Brazil). Nineteen stream segments of the Pedras River basin, (25º13'-25º26'S and 51º13'-51º28'W) were examined for the presence of macroalgae, of which 16 were visited once during the period of July 26 to August 21 2004 and three monthly from April 2004 to May 2005. Twenty nine infrageneric taxa and five "vegetative groups" were found. Cyanobacteria and Chlorophyta were the best represented divisions, followed by Rhodophyta and Heterokontophyta. Despite predominance of blue-green and green algae has been previously reported in several studies, the macroalgal flora of the Pedras River Basin showed, in general way, significant differences to other Brazilian regions. These results suggest that macroalgal communities are still little known, reflecting, basically, the scarcity of studies focusing these important primary producers in lotic ecosystem from Southern Brazil, particularly in Paraná State.

The Northernmost Populations of Tetraspora Gelatinosa (Chlorophyta) from Spitsbergen

“…The majority of data concern only the size of vegetative cells, sometimes also the size and shape of the thalli. Actually, using the Krupek et al 2008). In the temper− ate zones they are between 6-12-(14) μm (Desvaux 1818;Korshikow 1953;Prescott 1962;Downing 1970;Lakshminarayana 1976;Komarenko and Vasileva 1978;Starmach 1986;Ettl and Gärtner 1988;John et al 2002).…”

“…It is most often observed in temperate climates (Korshikov 1953;Prescott 1962;Rhodes 1967;Lakshminarayana 1976;Komarenko and Vasil'eva 1978;Starmach 1986;Sheath et al 1986Sheath et al , 1989John et al 2002;Simić et al 2002;Cărăuş 2003;Caisová et al 2009;Lukavský 2009,) but its habitats are also located in the equatorial and subtropical zones (Woodhead and Tweed 1957;Rhodes 1967;Cambra et al 1998;Ghazala et al 2004;Branco et al 2005;Islam and Irfanullah 2005;Valeem and Shameel 2005;Krupek et al 2007Krupek et al , 2008. There is limited information on T. gelatinosa from polar regions.…”

Ecballocystis pulvinata Bohlin (Hormotilaceae, Chlorophyta): morfologia externa e ocorrência em ambientes lóticos da região Sudeste do Brasil

“…No entanto, todas ocorreram em hábitats cuja luz penetrava com facilidade (aberto), com substrato rochoso, profundidade média de 3 a 15 cm e de correnteza rápida (38,5 -75,0 cm s -1 ). Dados ecológicos sobre essa espécie são escassos, contudo essas informações concordam com as investigações realizadas por Branco & Necchi Junior (1996), Necchi Junior et al(2000, Krupek et al (2008), Peres et al (2008) e Branco et al (2009).…”

The genera Chara and Nitella (Chlorophyta, Characeae) in the subtropical Itaipu Reservoir, Brazil

“…Chara guairensis was described by Bicudo (1972Bicudo ( , 1974 for the Guaíra region, N. subglomerata was recorded for the mid-western region of the state (Branco et al 2009), the genus Nitella was recorded for the mid-southern region (Krupek et al 2008), and N. furcata recorded for the Upper Paraná river floodplain (Thomaz et al 2009). Species recorded for the Itaipu Reservoir include C. braunii, C. guairensis, Chara sp., Nitella sp., N. acuminata, N. furcata, N. furcata subsp.…”