Levantamento florístico e síndromes de dispersão em remanescentes de Floresta Ombrófila Mista na região centro-sul do estado do Paraná

Abstract

-(Floristic survey and dispersal syndromes in Araucaria Forest remnants of Parana state, Brazil). This study presents a list of plants found in three areas of Araucaria Forest along with their dispersal syndromes. We sampled monthly (August 2003 to December 2005) fi ve transects with 5 km each, collecting samples of fl owering and fruiting plants. We identifi ed 210 species, including 83 trees, 58 shrubs, 36 herbs, 23 vines, eight epiphytes and two parasites. Most species were zoochorous (68.6%), followed by anemochorous (21.9%) and autochorous (6.7%) ones. Comparisons with other fl orist surveys previously conducted in this forest type suggested that our study areas are poor, both when all species are taken into account or when just trees are. The results are discussed based on the history of degradation of the study region and on the abundance of bamboos in the understory. Key words: Araucaria Forest, conservation, fl oristic diversity, phytogeography RESUMO -(Levantamento fl orístico e síndromes de dispersão em remanescentes de Floresta Ombrófi la Mista na região centro-sul do estado do Paraná). O presente estudo apresenta a listagem das espécies vegetais de três áreas de Floresta com Araucária e as suas respectivas síndromes de dispersão. Foram percorridos mensalmente (agosto/2003 a dezembro/2005) cinco transectos com 5 km cada, ao longo dos quais foi coletado material fértil, resultando na identifi cação de 210 espécies: 83 árvores, 58 arbustos, 36 ervas, 23 trepadeiras, oito epífi tas e duas parasitas. A maioria (68,6%) das espécies possui dispersão zoocórica, seguidas pelas espécies anemocóricas (21,9%) e autocóricas (6,7%). Comparações fl orísticas com áreas recobertas pela mesma formação fl orestal sugerem que os remanescentes estudados apresentam baixa riqueza específi ca, tanto quando a comparação é realizada considerando todas as formas de vida como quando apenas as espécies arbóreas são consideradas. Os resultados são discutidos à luz do histórico de exploração da região de estudo e da abundância de taquaras no sub-bosque. Palavras-chave: conservação, diversidade fl orística, fi togeografi a,

Floristic composition and dispersal syndromes in Araucaria Forest remnants in the municipality of Colombo, Paraná state, Brazil

“…In fact, in this Brazilian state, Kozera et al (2006) have found 390 species in Curitiba, Britez et al (1995) 307 species in São Mateus do Sul, and Liebsch et al (2009) 210 species in Bituruna. It is interesting to observe that although several inventories ignore non-trees, this group might represent the majority of the species found in a particular area as in the present study.…”

“…It is interesting to observe that although several inventories ignore non-trees, this group might represent the majority of the species found in a particular area as in the present study. In fact, previous studies have shown that trees can represent only about half of terrestrial plant diversity (Ishara et al 2008;Gasper et al 2013), including FOM areas (Kozera et al 2006;Liebsch et al 2009). …”

“…Later the vouchers were deposited in the Herbarium Fernando Cardoso da Silva (HFC) of Embrapa Forestry, with duplicates sent also been found for FOM trees (Rondon Neto et al 2001;Liebsch and Acra 2007;Liebsch et al 2009). …”

“…Among the various floristic surveys in the FOM (Carvalho 1980;Oliveira and Rotta 1982;Galvão et al 1989;Negrelle and Silva 1992;Koehler et al 1998;Sanquetta et al 2001), few have collected all life forms (Britez et al 1995;Kozera et al 2006;Liebsch et al 2009), as pointed out by Liebsch et al (2009). It is notable that most studies give preference to tree species at the expense of other life forms, even if in some cases the trees represent less than half the local plant diversity (Kozera et al 2006;Liebsch et al 2009).…”

“…It is notable that most studies give preference to tree species at the expense of other life forms, even if in some cases the trees represent less than half the local plant diversity (Kozera et al 2006;Liebsch et al 2009). …”