科研之友
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摘要
this study was conducted in a transition area of approximately 30 hectares between semideciduous forest and araucaria forest located in the capela do calv芍rio, at campo mourˋo, paran芍. for the phytosociological analysis 80 phorophytes were selected. the survey found 61 species, 39 genera and 13 families of epiphytes (10 pteridophytes and 51 magnoliophytes). the richest families were: orchidaceae (38%), bromeliaceae and polypodiaceae (13%), cactaceae (11%) and piperaceae (8%), which together make up 83% of the sampled species. tillandsia (bromeliaceae) and peperomia (piperaceae) were the richest genera, each with five species. anemochory was found in 67% of the species and 86% were classified as true holoepiphytes. of the 61 species listed, 43 occurred in the sample area; the following five had the highest frequency: microgramma squamulosa, pleopeltis angusta, tillandsia loliacea, tillandsia recurvata and pecluma sicca. the shannon index (h＊) recorded for the area was 3.175 and evenness (j) 0.863. nine epiphytic species were restricted to just one phorophyte. microgramma squamulosa was the most important species over the entire sample area. the vegetation of the interfluvial area, in an advanced stage of development, was richer than the riverside vegetation.
