Functional structure and specialization in three tropical plant-hummingbird interaction networks across an elevational gradient in Costa Rica

Ecography ◽  
2015 ◽  
Vol 38 (11) ◽  
pp. 1119-1128 ◽  
Author(s):  
María A. Maglianesi ◽  
Nico Blüthgen ◽  
Katrin Böhning-Gaese ◽  
Matthias Schleuning
Keyword(s):  
Costa Rica ◽  
Elevational Gradient ◽  
Interaction Networks ◽  
Functional Structure ◽  
Tropical Plant

scholarly journals Topography and Three-Dimensional Structure Can Estimate Tree Diversity along a Tropical Elevational Gradient in Costa Rica

2018 ◽  
Vol 10 (4) ◽  
pp. 629 ◽  
Author(s):  
Chelsea Robinson ◽  
Sassan Saatchi ◽  
David Clark ◽  
Johanna Hurtado Astaiza ◽  
Anna Hubel ◽  
...  
Keyword(s):  
Costa Rica ◽  
Three Dimensional ◽  
Elevational Gradient ◽  
Tree Diversity ◽  
Dimensional Structure ◽  
Three Dimensional Structure

scholarly journals Microsatellite DNA Evidence for Gene Flow in Neotropical Lek-Mating Long-Tailed Manakins

The Condor ◽  
2003 ◽  
Vol 105 (3) ◽  
pp. 580-586 ◽  
Author(s):  
David B. McDonald
Keyword(s):  
Sexual Selection ◽  
Gene Flow ◽  
Costa Rica ◽  
Clustering Analysis ◽  
Elevational Gradient ◽  
Dna Evidence ◽  
Lek Mating ◽  
Rapid Divergence ◽  
Para Determinar ◽  
Single Cluster

Abstract I genotyped lek-mating Long-tailed Manakins (Chiroxiphia linearis) at Monteverde and Santa Rosa, Costa Rica, 115 km apart. Cavalli-Sforza distance was 0.04, DLR was 0.18, and RST and θ were both 0.02. Bayesian clustering analysis indicated that both populations were part of a single cluster rather than from distinct clusters. I present a binomial test for probability of allelic absence as a function of sample size. Genotypic likelihood tests assigned 50% of Monteverde birds to Santa Rosa, versus 26% of Santa Rosa birds to Monteverde. Two lines of evidence supported the idea of asymmetric gene flow up the elevational gradient from Santa Rosa to Monteverde. Low differentiation at this spatial scale, despite intense sexual selection, suggests that sexual selection alone is unlikely to promote rapid divergence leading to speciation. Reduced gene flow, produced by geographic barriers or behavioral factors, may also be required. Evidencia de Flujo Génico Mediante ADN Microsatelital en Chiroxiphia linearis, un Ave Neotropical con Estrategia Reproductiva Tipo “Lek” Resumen. Determiné el genotipo de individuos de Chiroxiphia linearis en dos poblaciones separadas por 115 km, Monteverde y Santa Rosa en Costa Rica. La distancia de Cavalli-Sforza fue 0.04, DLR fue 0.18, y tanto el valor de RST como el de θ fue 0.02. Un análisis de agrupamiento bayesiano indicó que ambas poblaciones pertenecen a un mismo grupo y no a dos grupos diferentes. Presento una prueba binomial para determinar la probabilidad de ausencia alélica como una función del tamaño muestral. La prueba de probabilidad genotípica asignó al 50% de los individuos de Monteverde a la población de Santa Rosa, mientras que un 26% de los individuos de Santa Rosa fue asignado a Monteverde. Dos líneas de evidencia apoyan la idea de flujo génico asimétrico hacia arriba del gradiente altitudinal entre Santa Rosa y Monteverde. A pesar de la intensa presión selectiva sexual, la baja diferenciación a esta escala espacial sugiere que probablemente la selección sexual por sí sola no promueve la rápida divergencia que conduce a la especiación. También se requeriría reducción del flujo génico a través de barreras geográficas y factores conductuales.

scholarly journals On the Life Cycle and Natural History of Hymenitis Nero (Lepidoptera: Ithomiinae) in Costa Rica

1972 ◽  
Vol 79 (4) ◽  
pp. 284-294 ◽  
Author(s):  
Allen M. Young
Keyword(s):  
Life Cycle ◽  
Costa Rica ◽  
Natural History ◽  
Population Biology ◽  
Distribution Patterns ◽  
Broad Distribution ◽  
Tropical Plant ◽  
History Of ◽  
Local Patterns ◽  
Tropical Plant Communities

A knowledge of life cycle and natural history are often important prerequisites to studies of population biology in butterflies. Although studies on the systematics and broad distribution patterns of that familiar New World Tropical group, the Ithomiinae, have been conducted (Seitz, 194; Fox, 1956; Fox, 1968), a lot remains to be known about the biology of many species in Central America. This is surprising in light of the considerable interest in these butterflies as members of mimicry complexes. In this spirit, this paper summarizes life cycle and natural history data on a clear wing ithoreiine Hymenitis nero (Hewitson) (Nymphalidae: Ithomiinae) in Costa Rica. Similar studies of several other sympatric ithomiines have either been completed (Young, in prep.) or begun, as a preliminary step towards understanding the local patterns of diversity of this family in selected tropical plant communities.

Temporal Variation in Birds and Fruits Along an Elevational Gradient in Costa Rica

Ecology ◽  
1991 ◽  
Vol 72 (1) ◽  
pp. 180-193 ◽  
Author(s):  
Bette A. Loiselle ◽  
John G. Blake
Keyword(s):  
Costa Rica ◽  
Temporal Variation ◽  
Elevational Gradient

scholarly journals Spatiotemporal shifts in the role of floral traits in shaping tropical plant-pollinator interactions

2020 ◽  
Author(s):  
Yannick Klomberg ◽  
Robert Tropek ◽  
Jan E.J. Mertens ◽  
Ishmeal N. Kobe ◽  
Jiří Hodeček ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Elevational Gradient ◽  
Floral Traits ◽  
Pollination Syndrome ◽  
Floral Trait ◽  
Mount Cameroon ◽  
Tropical Plant ◽  
Random Forest Models ◽  
Pollination Systems ◽  
Plant Pollinator

AbstractThe pollination syndrome hypothesis predicts that plants pollinated by the same pollinator group bear convergent combinations of specific floral traits. Nevertheless, some studies have shown relatively low predictive power for these floral trait combinations. This discrepancy may be caused by changes in the importance of specific floral traits for shaping interactions under different environmental conditions and for different pollinator groups. To test this, we studied pollination systems and floral traits along an elevational gradient on Mount Cameroon during wet and dry seasons. Using Random Forest models, allowing the ranking of traits by significance, we demonstrated that some floral traits are more important than others in shaping interactions and that these traits predict pollinators relatively well. However, the distribution and importance of traits varies under different environmental conditions. Our results imply the need to improve our trait-based understanding of plant-pollinator interactions to better inform the debate surrounding pollination syndrome hypothesis.

Species richness and distribution of ferns along an elevational gradient in Costa Rica

2006 ◽  
Vol 93 (1) ◽  
pp. 73-83 ◽  
Author(s):  
James E. Watkins ◽  
Catherine Cardelús ◽  
Robert K. Colwell ◽  
Robbin C. Moran
Keyword(s):  
Species Richness ◽  
Costa Rica ◽  
Elevational Gradient

scholarly journals Fish assemblages and their ecological traits along an elevational gradient in the Río Pacuare, Costa Rica

2018 ◽  
Vol 66 (1-1) ◽  
pp. 132
Author(s):  
Jorge Picado Barboza ◽  
Gerardo Umaña Villalobos
Keyword(s):  
Costa Rica ◽  
Fish Assemblages ◽  
Species Turnover ◽  
Habitat Preferences ◽  
Elevation Gradient ◽  
Fish Fauna ◽  
River Mouth ◽  
Elevational Gradient ◽  
Abundant Species ◽  
Alpha And Beta Diversity

Between May 2004 and May 2005, we sampled fish in 19 sites, grouped in four elevations, ranging from the river mouth to 650 m.a.s.l. in the Río Pacuare, Caribbean versant of Costa Rica. Changes in the distribution and composition of the fish fauna, as well as patterns of alpha and beta diversity along an elevational gradient were assessed. Additional analyses of habitat preferences, trophic guilds, functional groups and general ecology for the most abundant species are included. All fish captured were classified into 22 families, 43 genera and 53 species. The most abundant family was Characidae, followed by Gobiidae, Mugilidae, Poeciliidae and Heptateridae, which together comprise 87.9 % of all sampled individuals. Elevation shows an inverse effect on species diversity, we observed a monotonic decrease in species richness with increasing elevation (p < 0.05), as reported in other tropical rivers. According to our results, in the Río Pacuare the total fish fauna diversity is found within the first 500 m.a.s.l. Species turnover increases with elevation, while nestedness decreases. Turnover was dominated by the loss of species rather than gain; the higher species loss was registered between the river mouth and the lower river reach (< 100 m.a.s.l.). Seven species can be classified as typical or core species (Astyanax aeneus, Sicydium altum, Agonostomus monticola, Poecilia gillii, Brycon costaricensis, Rhamdia laticauda and Joturus pichardi) along the elevation gradient. The habitat availability and the integration of ecomorphological, feeding and reproductive traits help to explain better the elevation distribution of the complete set of species observed. Although it is possible to identify groups of species characteristic of each reach of river, this does not mean that they are isolated from each other. Natural drift and movement along the river of some species during their life cycle, especially S. altum, A. monticola and J. pichardi, are key processes linking the whole watershed. The present study constitutes a first step in documenting and understanding the distribution and composition of fish assemblages in a watershed that is relatively intact and well-conserved in the Caribbean versant of Costa Rica.

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