Ecological mechanisms explaining interactions within plant-hummingbird networks: morphological matching increases towards lower latitudesJesper Sonne, Jeferson Vizentin-Bugoni, Pietro K. Maruyama, Andréa C. Araújo, Edgar Chávez-González, Aline G. Coelho, Peter A. Cotton, Oscar H. Marín-Gómez, Carlos Lara, Liliana R. Lasprilla, Caio G. Machado, Maria A. Maglianesi, Tiago S. Malucelli, Ana M. Martín-González, Genilda M. Oliveira, Paulo E. Oliveira, Raul Ortiz-Pulido, Márcia A. Rocca, Licléia C. Rodrigues, Ivan Sazima, Benno I. Simmons, Boris Tinoco, Isabela G. Varassin, Marcelo F. Vasconcelos, Bob O’Hara … & Bo Dalsgaard
Interactions between species are influenced by different ecological mechanisms, such as morphological matching, phenological overlap, and species abundances. How these mechanisms explain interaction frequencies across environmental gradients remains poorly understood. Consequently, we also know little about the mechanisms that drive the geographical patterns in network structure, such as complementary specialization and modularity. Here, we use data on morphologies, phenologies and abundances to explain interaction frequencies between hummingbirds and plants at a large geographic scale. For...
Diurnal foraging ant–tree co-occurrence networks are similar between canopy and understorey in a Neotropical rain forestReuber Antoniazzi, Jose Garcia-Franco, Milan Janda, Maurice Leponce & Wesley Dáttilo
Discussion of the vertical stratification of organisms in tropical forests has traditionally focused on species distribution. Most studies have shown that, due to differences in abiotic conditions and resource distribution, species can be distributed along the vertical gradient according to their eco-physiological needs. However, the network structure between distinct vertical strata remains little-explored. To fill this gap in knowledge, we used baits to sample ants in the canopy and understorey trees of a Mexican tropical...
Data from: Searching for keystone plant resources in fruit-frugivore interaction networks across the NeotropicsJoão Vitor De S. Messeder, Tadeu J. Guerra, Wesley Dáttilo & Fernando A. O. Silveira
Identifying keystone plant resources (KPR) is a contentious issue in ecology and conservation. Despite recent advances provided by mutualistic networks, we still lack studies addressing large-scale identification of keystone plants. We developed a novel quantitative framework for the large-scale identification of KPR that combines centrality and effects of simulated removals on networks properties. We built a database with 38 fruit-frugivore networks comprising 6180 pairwise interactions from Neotropical forest and non-forest ecosystems ranging from sea level...
Species with genetically differentiated allopatric populations commonly differ in phenotypic traits due to drift and/or selection, which can be important drivers of reproductive isolation. Wedge-tailed sabrewing (Campylopterus curvipennis) is a species complex composed of three genetically and acoustically differentiated allopatric lineages which correspond to currently recognized subspecies in Mexico: C. c. curvipennis (Sierra Madre Oriental), C. c. pampa (Yucatán Peninsula), and C. c. excellens (Los Tuxtlas). Although excellens is taxonomically recognized as a distinct species,...
Data from: Evidence for spatial clines and mixed geographic modes of speciation for North American cherry-infesting Rhagoletis (Diptera:Tephritidae) fliesMeredith Doellman, Gilbert Saint Jean, Scott Egan, Thomas Powell, Glen Hood, Hannes Schuler, Daniel Bruzzese, Mary Glover, James Smith, Wee Yee, Robert Goughnour, Juan Rull, Martin Aluja & Jeffrey Feder
An important criterion for understanding speciation is the geographic context of population divergence. Three major modes of allopatric, parapatric, and sympatric speciation define the extent of spatial overlap and gene flow between diverging populations. However, mixed modes of speciation are also possible, whereby populations experience periods of allopatry, parapatry, and/or sympatry at different times as they diverge. Here, we report clinal patterns of variation for 21 nuclear-encoded microsatellites and a wing spot phenotype for cherry-infesting...
Data from: Spatiotemporal dynamics of the ant community in a dry forest differ by vertical strata but not by successional stageFrederico Neves, Reuber Antoniazzi, Flávio Camarota, Fábio Pacelhe & Scott Powell
Ants are diverse and ecologically important organisms in tropical forests, where their spatiotemporal distribution can be highly complex. This complexity arises mainly from marked differences in microclimatic conditions and resource availability through space and time that is even more evident in highly seasonal environments, such as tropical dry forests. However, it is unclear how seasonality interacts with other factors that might shape temporal variation of ant composition (β-diversity), like vertical strata and habitat disturbance. Our...
The sexes may have different optima in cognitive traits due to differences in life history strategies and the expense of investing in metabolically costly brain tissue. However, given genetic correlations, each sex could be constrained from reaching its cognitive optimum due to intralocus sexual conflict. We compared learning performance of two male alternative reproductive tactics and females from known genotypes (both sire and dam) in the livebearing fish Xiphophorus multilineatus. We predicted that females’ learning...
Discordant phylogenetic endemism patterns in a recently diversified Brassicaceae lineage from the Atacama Desert: when choices in phylogenetic and species distribution information matterOscar Toro-Nuñez & Andres Lira-Noriega
Aim: Phylogenetic endemism (PE) has become a useful estimator of evolutionary history in conservation, given its capacity to estimate diversity hotspots as the combination of phylogenetic diversity (PD) and range size distributions of co-occurring taxa. However, potential limitations could preclude a general assessment of PE, especially in the presence of incongruent phylogenetic signals and the use of different estimates of species distribution at fine spatial scales. Here, we assess the utility of using PE in...
Using niche centrality within the scope of the nearly neutral theory of evolution to predict genetic diversity in a tropical conifer species-pairJorge Cruz Nicolás, Gustavo Ibrahim Gilés Pérez, Andrés Lira Noriega, Norberto Martínez-Méndez, Erika Aguirre-Planter, Luis E. Eguiarte & Juan Pablo Jaramillo Correa
Aim: Estimating genetic diversity is key for understanging biogeographic and evolutionary processes. However, gathering genetic information is not feasible for all taxa or populations, particularly in the tropical regions. Identifying proxies for inferring such values has thus become essential. Here, we built on the niche centrality hypothesis (NCH; or central-abundance hypothesis) and the nearly neutral theory of evolution (NNT) to identify some of such proxies using a montane tropical conifer species-pair as model. The NCH...
Aim. High levels of species richness in mountains are associated with their hypothetical roles as cradles and/or museums of diversity but the generality of these roles remains unknown. To fill this gap, we tested these two hypotheses at a global scale and assessed the direct and indirect effects of abiotic regional features on the variation of montane amphibian richness worldwide. Location. Global Time period: Last 300 million years Major taxa studied. Amphibians Methods. Using an...
Vertical distribution of epiphytic lichens on Quercus laurina Humb. & Bonpl. in a remnant of cloud forest in the state of Veracruz, MéxicoGonzalo Castillo-Campos, Rosa Emilia Pérez-Pérez, Octavio Córdova-Chávez, José Guadalupe García-Franco & Marcela Eugenia Da Silva Cáceres
It is considered that in the tropics, lichen richness and cover tend to increase from the trunk base to the top of the crown of trees. In this study we calculate total beta diversity of the lichen community along a vertical gradient on Quercus laurina. By comparing the richness and cover of the lichens by zone, we will be able to prove that the foliose and fruticose forms will be the minor component of the...
Instituto de Ecología11
Universidade Federal de Minas Gerais3
National Autonomous University of Mexico3
Universidade Federal de Sergipe2
University of Notre Dame1
George Washington University1
Universidad Michoacana de San Nicolás de Hidalgo1