Epiphyte Diversity and Biomass in the Canopy of Lowland and Montane Forests in Ecuador

Epiphyte Diversity and Biomass in the Canopy of Lowland and Montane Forests in Ecuador

Epiphyte diversity as well as distribution and composition of epiphytic biomass was investigated in two lowland and two montane rain forests in Ecuador. Species numbers of epiphytes per tree were slightly higher in the montane (22-41 in Los Cedros, 33-54 in Otonga) than in the lowland forests (9-43...

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Veröffentlicht in:Journal of Tropical Ecology. - Cambridge University Press, 1985. - 16(2000), 5, Seite 673-688
1. Verfasser: Freiberg, Martin (VerfasserIn)
Weitere Verfasser: Freiberg, Elke
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2000
Zugriff auf das übergeordnete Werk:Journal of Tropical Ecology
Schlagworte:Biodiversity Biomass Canopy Ecuador Epiphytes Epiphyte Humus Tropical Rain Forest Biological sciences Physical sciences
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520 |a Epiphyte diversity as well as distribution and composition of epiphytic biomass was investigated in two lowland and two montane rain forests in Ecuador. Species numbers of epiphytes per tree were slightly higher in the montane (22-41 in Los Cedros, 33-54 in Otonga) than in the lowland forests (9-43 in Yasuni, 19-32 in Tiputini), however differences were not significant. In contrast, some epiphyte families did show significant altitudinal differences. The total epiphytic biomass per branch surface decreased from the centre of the crown to the periphery, and was generally higher in the montane (6.0 kg m-2 on central branches in Los Cedros, 1.8 kg m-2 in Otonga) than in the lowland forests (1.3 kg m-2 in Yasuni and 1.8 kg m-2 in Tiputini). Especially, dry weight of bryophytes and dead organic matter was higher in the mountains. In contrast, the biomass of green parts of vascular epiphytes on central branches was about the same in all four forests (0.4-0.6 kg m-2). A comparison with literature data from other study sites of tropical moist forests supports the observation that biomass of vascular epiphytes does not significantly change with altitude. It is discussed, that the high bryophytic biomass in montane compared to lowland forests is a major reason for differences in humus biomass between these forest types. 
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