UV-blocking chemicals in forest canopy and understory lichens


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UV-blocking chemicals in forest canopy and understory lichens

Material Information

Title:
UV-blocking chemicals in forest canopy and understory lichens
Translated Title:
Productos químicos para bloquear los rayos ultravioleta en el dosel del bosque y en los líquenes del sotobosque
Creator:
Heal, Katherine Rose
Publication Date:
Language:
Text in English

Subjects

Subjects / Keywords:
Lichens--Ecology ( lcsh )
Liquenes--Ecologia ( lcsh )
Lichen communities ( lcsh )
Comunidades de liquenes ( lcsh )
Cloud forest ecology ( lcsh )
Ecologia del bosque nuboso ( lcsh )
Costa Rica--Puntarenas--Monteverde Zone
Costa Rica--Puntarenas--Zona de Monteverde
CIEE Spring 2008
CIEE Primavera 2008
Genre:
Reports

Notes

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. ( ,,, )
Abstract:
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.
Biographical:
Student affiliation : Department of Chemistry, University of Minnesota Institute of Technology
Acquisition:
Born Digital

Record Information

Source Institution:
Monteverde Institute
Holding Location:
Monteverde Institute
Rights Management:
This item is licensed with the Creative Commons Attribution Non-Commercial No Derivative License. This license allows others to download this work and share them with others as long as they mention the author and link back to the author, but they can’t change them in any way or use them commercially.
Resource Identifier:
M39-00462 ( USFLDC DOI )
m39.462 ( USFLDC Handle )

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Format:
Book

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Full Text
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UV-blocking chemicals in forest canopy and understory lichens
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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 lquenes producen ms de ochocientas metabolitos secundarios, muchos de los cuales se encuentran en ningn otro lugar en la naturaleza. Muchas de estas sustancias tienen propiedades bloqueadoras de los rayos UV, incluyendo el cido snico y depsides muchos. Estos productos qumicos pueden afectar la colonizacin de xito entre los lquenes sotobosque y dosel. En Monteverde, Costa Rica, un total de 244 lquenes se extrajeron de seis rboles, la mitad de puntas de las ramas del dosel y la mitad del tronco en el sotobosque.
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Text in English.
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Lichens--Ecology--Costa Rica--Puntarenas--Monteverde Zone
Lichen communities--Costa Rica--Puntarenas--Monteverde Zone
Cloud forest ecology--Costa Rica
4
Lquenes--Ecologa-- Costa Rica--Puntarenas--Zona de Monteverde
Comunidades de lquenes--Costa Rica--Puntarenas--Zona de Monteverde
Ecologa del bosque nuboso--Costa Rica
653
Tropical Ecology 2008
Ecologa Tropical 2008
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Reports
720
CIEE
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t Monteverde Institute : Tropical Ecology
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u http://digital.lib.usf.edu/?m39.21




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