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Composição florística de trepadeiras ocorrentes em bordas de fragmentos de floresta estacional, Santa Maria, Rio Grande do Sul, Brasil

Jaqueline Durigon, Thais Scotti do Canto-Dorow and Sônia Maria Eisinger
Rodriguésia
Vol. 60, No. 2 (2009), pp. 415-422
Stable URL: http://www.jstor.org/stable/23499998
Page Count: 8
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Composição florística de trepadeiras ocorrentes em bordas de fragmentos de floresta estacional, Santa Maria, Rio Grande do Sul, Brasil
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Abstract

Foi realizado o levantamento das espécies de trepadeiras ocorrentes em bordas de fragmentos de floresta estacional em Santa Maria, RS. As coletas foram quinzenais, durante o período de março de 2006 a março de 2007, e se restringiram às margens dos fragmentos florestais que se estendem ao longo das principais rodovias de acesso ao município. Com base no modo de ascensão, hábito e ocorrência, as espécies foram classificadas respectivamente em: trepadeiras volúveis, com gavinhas ou apoiantes; herbáceas ou lenhosas; raras, ocasionais ou abundantes. Foram registradas 73 espécies, distribuídas em 47 gêneros e 24 famílias. Apocynaceae (nove espécies), Sapindaceae (oito), Bignoniaceae (sete), Convolvulaceae (sete) e Passifloraceae (seis) foram as famílias de maior riqueza específica. Constatou-se o predomínio de trepadeiras volúveis, seguido pelas formas dotadas de gavinhas e das apoiantes. O hábito herbáceo prevaleceu sobre o lenhoso e, quanto à ocorrência, a maioria das espécies foi abundante, seguida pelas ocasionais e raras. A survey of climbing species growing along the edge of seasonal forest fragments in Santa Maria, RS, was carried out. Collections were made between March 2006 and March 2007, only at the edge of forest fragments found along main access roads. Based on climbing pattern, habit, and occurrence, the species were classified into: twiners, plants with tendrils or scandent; herbaceous or woody; rare, occasional or abundant. Seventy three species were registered, distributed in 47 genera, and 24 families. Apocynaceae (nine species), Sapindaceae (eight), Bignoniaceae (seven), Convolvulaceae (seven) and Passifloraceae (six) were the families with the highest species richness. Twiners were dominant, followed by forms with tendrils, and scandent forms. Herbaceous habit was predominant over woody and, regarding to the occurrence, most species were considered abundant, followed by occasional and rare.

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