Tropical Ecology and Conservation [Monteverde Institute]

Alternative Title

Productos químicos para bloquear los rayos ultravioleta en el dosel del bosque y en los líquenes del sotobosque

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Publication Date

May 2008

Abstract

Lichens produce over eight hundred secondary metabolites, many of which are found nowhere else in nature. Many of these chemicals have UV-blocking properties, including usnic acid and many depsides. These chemicals could affect colonization success between understory and canopy lichens. In Monteverde, Costa Rica, a total of 244 lichens were extracted from six trees, half from canopy branch tips and half from the trunk in the understory. Canopy coverage was significantly higher in the understory (t-test, F = 88.78, p < 0.05). In the pooled population, usnic acid was present in the branch tips more often than on the trunks (after Yates correction factor X2 c = 26.23, df = 1, p = 3.03E-07). Conversely, depsides were present more often on the trunks (after Yates correction factor X2 c = 26.23, df = 1, p = 3.02E-07). The differences in the chemical constituents, which are associated with differences in lichen community composition, may reflect adaptations that allow niche partitioning along light gradients. Los líquenes producen más de ochocientas metabolitos secundarios, muchos de los cuales se encuentran en ningún otro lugar en la naturaleza. Muchas de estas sustancias tienen propiedades bloqueadoras de los rayos UV, incluyendo el ácido úsnico y depsides muchos. Estos productos químicos pueden afectar la colonización de éxito entre los líquenes sotobosque y dosel. En Monteverde, Costa Rica, un total de 244 líquenes se extrajeron de seis árboles, la mitad de puntas de las ramas del dosel y la mitad del tronco en el sotobosque.

Keywords

Lichens--Ecology, Liquenes--Ecologia, Lichen communities, Comunidades de liquenes, Cloud forest ecology, Ecologia del bosque nuboso, Costa Rica--Puntarenas--Monteverde Zone, Costa Rica--Puntarenas--Zona de Monteverde, CIEE Spring 2008, CIEE Primavera 2008

Description

Student affiliation : Department of Chemistry, University of Minnesota Institute of Technology Born Digital

Subject: topical

Lichens--Ecology; Liquenes--Ecologia; Lichen communities; Comunidades de liquenes; Cloud forest ecology; Ecologia del bosque nuboso; CIEE Spring 2008; CIEE Primavera 2008

Subject: geographic

Costa Rica--Puntarenas--Monteverde Zone; Costa Rica--Puntarenas--Zona de Monteverde

Genre

Reports

Holding Location

Monteverde Institute MVI

Identifier

M39-00462

UV-blocking chemicals in forest canopy and understory lichens

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