How to Cite

Heatwole, H. (1993). DISTRIBUTION OF EPIPHYTES ON TRUNKS OF THE ARBORESCENT FERN, BLECHNUM PALMIFORME, AT GOUGH ISLAND, SOUTH ATLANTIC. Selbyana, 14, 46–58. Retrieved from https://ojs.test.flvc.org/selbyana/article/view/122793


A total of25 species ofepiphyte was recorded from trunks ofthe arborescent fern, Blechnum
palmiforme, on Gough Island; many ofthese also occurred on other hosts and/or on the ground. Number
of species of epiphytes was positively correlated with trunk height, whereas their total percentage cover
showed no such relation. There were no significant vertical or radial differences in size ofpatch for any of
the species abundant enough to be tested. Ferns were the dominant group; bryophytes and lichens also
were important, but angiosperms were ofminor significance. Frequencies oftrunks occupied differed with
trunk height for many species, but did not differ radially.
Microdistributional patterns included (a) species characteristic ofthe bottom ofthe trunk, (b) those found
primarily near the top, and (c) those more uniformly distributed; some species favored certain sides ofthe
trunk over others. Patterns ofindividual species variously canceled or enhanced each other and collective
total cover of some larger taxa maintained significant vertical (bryophytes) or radial (ferns) differences;
lichens as a group tended to be sparsely but uniformly distributed.


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