Riqueza e estratificação vertical de epífitas vasculares na Estação Ecológica de Jataí: área de Cerrado no Sudeste do Brasil

Abstract

-(Richness and vertical stratification of vascular epiphytes in Jataí Ecological Station -a Southeast Brazilian Cerrado area). The richness and vertical stratification of vascular epiphytes was studied in Jataí Ecological Station (EEJ), São Paulo State, Brazil. A total of 1,574 epiphytes were recorded, corresponding to 29 species, 20 genera, and seven families. Angiosperms were represented by 23 species and Pteridophytes by six species. The characteristic form, holoepiphytes, was dominant in the area (93.1%). Epiphytes specialists were most common in the area, contributing with about 55% of species (17% trunk epiphytes and 38% canopy epiphytes); generalist species contributed 42%, and hemiepiphytes, with 3%. The intermediate zones had the highest number of species and more number of records. There was a significant difference among species that comprise the lower zones and the upper zones in the host trees. The richness and distribution of epiphytes are determined by some climatic factors, but the moisture and light intensity are the most important regulatory factors in the cerrado area researched. Key words: Ecological types, growth form, hotspots, phytosociology of epiphytes RESUMO -(Riqueza e estratificação vertical de epífitas vasculares na Estação Ecológica de Jataí -área de Cerrado no Sudeste do Brasil). A riqueza e a estratificação vertical das epífitas vasculares foram estudadas na Estação Ecológica deJataí (EEJ), SP, Brasil. No total, 1.574 epífitas pertencentes a 29 espécies, 20 gêneros e sete famílias foram encontradas. As Angiospermas foram representadas por 23 espécies e as Samambaias, por seis espécies. Os holoepífitos característicos formam dominantes na área (93,1%). Epífitas especialistas foram predominantes na área, cerca de 55% das espécies (17% de epífitas de fuste e 38% de epífitas de copa); as espécies generalistas contribuíram com cerca de 42% e as hemiepífitas com 3%. As zonas intermediárias apresentaram maior número de espécies e maior número de registros. Houve diferença significativa entre as espécies que compõem as zonas inferiores e as zonas superiores nos forófitos. A riqueza e a distribuição de epífitas são determinadas pelos fatores microclimáticos, sendo a umidade e a intensidade luminosa os fatores reguladores mais importantes na área de Cerrado estudada. Palavras-chave: Fitossociologia de epífitas, forma de crescimento, hotspots, tipos ecológicos

Vascular epiphytes on Pseudobombax (Malvaceae) in rocky outcrops (inselbergs) in Brazilian Atlantic Rainforest: basis for conservation of a threatened ecosystem

“…(Werneck & Espírito-Santo 2002), were considered, or when the epiphyte flora associated with different species of phorophytes was considered (Alves et al 2008). In both cases, the factor that contributed most to the lower species richness in these environments seems to be related to the Cerrado Domain, which supports a lower epiphytic richness than is found in the Atlantic Domain (Bataghin et al 2012). However, trunks of Vellozia are colonised by specific epiphytes of inselbergs and rocky fields (Porembski 2005), supporting an endemic epiphytic flora of rupestrian ecosystems of Orchidaceae (e.g.…”

Flora of inland Atlantic riparian forests in southwestern Brazil

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Samambaias epífitas em trilhas do Parque Guairacá, município de Paula Freitas, Paraná

“…A riqueza de espécies de samambaias epífitas encontrada na área de estudo está de acordo com os valores encontrados em outros estudos (p.ex. Bataghin et al, (21) 6 espécies; Geraldino et al, (22) 10 espécies), embora alguns trabalhos tenham encontrado valores maiores de riqueza (p.ex. Barros et al (23) -16 espécies; Fraga et al (24) -20 espécies; Kersten & Kuniyoshi (25) -27 espécies).…”

“…(20,27,(30)(31)(32) Considerando as plantas coletadas nas trilhas do parque Guairacá, percebem-se tais características morfológicas nitidamente, na maioria das espécies. Somado a isto, Geraldino et al (21) citam espécies comuns a este estudo (p.ex. Microgramma squamulosa (Kaulf.)…”