Patterns of petiole abundance and diversity in bark beetles (Scolytinae) of Cecropia trees in Monteverde, Costa Rica


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Patterns of petiole abundance and diversity in bark beetles (Scolytinae) of Cecropia trees in Monteverde, Costa Rica

Material Information

Title:
Patterns of petiole abundance and diversity in bark beetles (Scolytinae) of Cecropia trees in Monteverde, Costa Rica
Translated Title:
Patrones de abundancia del pecíolo y diversidad de los escarabajos de corteza (Scolytinae) de los árboles de Cecropia en Monteverde, Costa Rica
Creator:
Gandhi, Sonali
Publication Date:
Language:
Text in English

Subjects

Subjects / Keywords:
Bark beetles--Behavior ( lcsh )
Escarabajos de corteza--Comportamiento ( lcsh )
Interspecific interactions ( lcsh )
Interacciones interspecificas ( lcsh )
Climatic changes ( lcsh )
Cambios climaticos ( lcsh )
Monteverde Cloud Forest Reserve (Costa Rica)
Reserva Biologica Bosque Nuboso Monteverde (Costa Rica)
CIEE Summer 2008
CIEE Verano 2008
Genre:
Reports

Notes

Abstract:
Cecropia trees regularly shed their woody, large petioles year round. This provides bark beetles from the family Scolytinae with a dependable and stable microhabitat. Bark beetles bore into the petioles, lay their eggs, and feed on the pith (Wood 1983). This study was conducted in Monteverde, Costa Rica. It examined the abundance and diversity of bark beetles between Cecropia polyphlebia in the Monteverde Cloud Forest (1550 meters) and an intermediary phenotype at Bajo del Tigre (1400 meters). It also investigated the percent of petioles colonized, species richness, evenness, and the influence of petiole moisture and length on the abundance and diversity of beetles. I analyzed 90 dead, woody petioles from the ground and from hanging vegetation from each site. Petioles were dissected and beetles were removed and identified by one of six Scolytinae morphospecies. Differences in the abundance and diversity of beetles between the two species were then compared. This study suggests that there was no difference in species diversity between the two tree species (p > 0.05). However, a difference in abundance between the hybrid phenotype and C. polyphlebia was observed. The hybrid phenotype possessed a higher abundance of beetles. Also moisture content (ANCOVA, F = 4.93, df = 2, p = 0.0083), the species of Cecropia (ANCOVA, F = 11.2, df = 1, p =0.001), and petiole length with Cecropia species (ANCOVA, F = 5.16, df = 1, p = 0.0244) had an influence on the abundance of beetles. The higher abundance of beetles in the hybrid phenotype could indicate differences in interspecific competition due to phenotypic traits of the Cecropia species. Differences in moisture content and petiole length between the two Cecropia species may reflect petiole preference and favorability of tree hosts. Furthermore, the higher abundance of beetles in the lower elevation hybrid phenotype could indicate that the majority of bark beetles may not be affected by climate change unlike many other species of animals and plants that are being severely impacted by the increasing temperatures. ( ,,,,, )
Abstract:
Este estudio se realizó en Monteverde, Costa Rica. Examinó la abundancia y la diversidad de los escarabajos de corteza entre Cecropia polyphlebia (1550 metros) en el Bosque Nuboso de Monteverde y un fenotipo intermedio en el Bajo del Tigre (1400 metros). También investigó el porcentaje de pecíolos colonizados, riqueza de especies, igualdad y la influencia de la humedad del pecíolo y la longitud de la abundancia y diversidad de escarabajos.
Biographical:
Student affiliation: Department of Biology, University of Southern Indiana
General Note:
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:
M39-00444 ( USFLDC DOI )
m39.444 ( USFLDC Handle )

Postcard Information

Format:
Book

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Gandhi, Sonali
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Patrones de abundancia del pecolo y diversidad de los escarabajos de corteza (Scolytinae) de los rboles de Cecropia en Monteverde, Costa Rica
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Patterns of petiole abundance and diversity in bark beetles (Scolytinae) of Cecropia trees in Monteverde, Costa Rica
260
c 2008-08
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Born Digital
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Cecropia trees regularly shed their woody, large petioles year round. This provides bark beetles from the
family Scolytinae with a dependable and stable microhabitat. Bark beetles bore into the petioles, lay their
eggs, and feed on the pith (Wood 1983). This study was conducted in Monteverde, Costa Rica. It examined
the abundance and diversity of bark beetles between Cecropia polyphlebia in the Monteverde Cloud Forest
(1550 meters) and an intermediary phenotype at Bajo del Tigre (1400 meters). It also investigated the
percent of petioles colonized, species richness, evenness, and the influence of petiole moisture and length
on the abundance and diversity of beetles. I analyzed 90 dead, woody petioles from the ground and from
hanging vegetation from each site. Petioles were dissected and beetles were removed and identified by one
of six Scolytinae morphospecies. Differences in the abundance and diversity of beetles between the two
species were then compared. This study suggests that there was no difference in species diversity between
the two tree species (p > 0.05). However, a difference in abundance between the hybrid phenotype and C.
polyphlebia was observed. The hybrid phenotype possessed a higher abundance of beetles. Also moisture
content (ANCOVA, F = 4.93, df = 2, p = 0.0083), the species of Cecropia (ANCOVA, F = 11.2, df = 1, p
=0.001), and petiole length with Cecropia species (ANCOVA, F = 5.16, df = 1, p = 0.0244) had an
influence on the abundance of beetles. The higher abundance of beetles in the hybrid phenotype could
indicate differences in interspecific competition due to phenotypic traits of the Cecropia species.
Differences in moisture content and petiole length between the two Cecropia species may reflect petiole
preference and favorability of tree hosts. Furthermore, the higher abundance of beetles in the lower
elevation hybrid phenotype could indicate that the majority of bark beetles may not be affected by climate
change unlike many other species of animals and plants that are being severely impacted by the increasing
temperatures.
Este estudio se realiz en Monteverde, Costa Rica. Examin la abundancia y la diversidad de los escarabajos de corteza entre Cecropia polyphlebia (1550 metros) en el Bosque Nuboso de Monteverde y un fenotipo intermedio en el Bajo del Tigre (1400 metros). Tambin investig el porcentaje de pecolos colonizados, riqueza de especies, igualdad y la influencia de la humedad del pecolo y la longitud de la abundancia y diversidad de escarabajos.
546
Text in English.
650
Bark beetles--Behavior--Costa Rica--Monteverde Cloud Forest Reserve
Interspecific interactions--Cecropia
4
Escarabajos de corteza--Comportamiento--Costa Rica--Reserva Bosque Nuboso Monteverde
Interacciones interspecficas--Cecropia
653
Tropical Ecology 2008
Interspecific competition--Cecropia
Bark beetle feeding preferences
Ecologa Tropical 2008
Preferencias alimenticias del escarabajo de corteza
Competencia interspecfica--Cecropia
655
Reports
720
CIEE
773
t Monteverde Institute : Tropical Ecology
856
u http://digital.lib.usf.edu/?m39.8


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