33 Works

Data from: Tree diversity effects through a temporal lens: implications for the abundance, diversity, and stability of foraging birds

Luis Abdala-Roberts
1. Tree diversity can exert a strong influence on consumers, but most studies have involved short-term assessments. Consequently, we have a limited understanding of temporal variation in the effects of tree diversity on multi-trophic communities and thus how tree diversity impacts ecological function. 2. We conducted a year-long study in an experimental system in southern Mexico assessing the effects of tree diversity on the abundance and diversity of visiting birds. To this end, we recorded...

A meta‐analysis of insularity effects on herbivory and plant defences

Xoaquín Moreira, Bastien Castagneyrol, Carlos García‐Verdugo & Luis Abdala‐Roberts
Aim: Plants on islands are often subjected to lower levels of herbivory relative to those at mainland sites. As a consequence, island plants are predicted to exhibit lower levels of physical and chemical defences, which renders them more susceptible to introduced herbivores. Yet, instances of high pressure by superabundant herbivores native to islands have been reported in many insular systems, which presumably would result in heightened plant defences. To date, no quantitative review has been...

Data from: Flowering overlap and floral trait similarity help explain the structure of pollination network

Víctor Parra-Tabla, Alexander Suárez-Mariño, Gerardo Arceo-Gómez & Cristopher Albor
Co-flowering communities are usually characterized by high plant generalization but knowledge of the underlying factors leading to high levels of generalization and pollinator sharing, and how these may contribute to network structure is still limited. Flowering phenology and floral trait similarity are considered among the most important factors determining plant generalization and pollinator sharing. However, these have been evaluated independently even though they can act in concert with each other. Moreover, the importance of flowering...

Data from: Are tree species diversity and genotypic diversity effects on insect herbivores mediated by ants?

María José Campos-Navarrete, Luis Abdala-Roberts, Miguel A. Munguía-Rosas & Víctor Parra-Tabla
Plant diversity can influence predators and omnivores and such effects may in turn influence herbivores and plants. However, evidence for these ecological feedbacks is rare. We evaluated if the effects of tree species (SD) and genotypic diversity (GD) on the abundance of different guilds of insect herbivores associated with big-leaf mahogany (Swietenia macrophylla) were contingent upon the protective effects of ants tending extra-floral nectaries of this species. This study was conducted within a larger experiment...

Data from: Sweat bees on hot chillies: provision of pollination services by native bees in traditional slash-and-burn agriculture in the Yucatán Peninsula of tropical Mexico

Patricia Landaverde-González, José Javier G. Quezada-Euán, Panagiotis Theodorou, Tomás E. Murray, Martin Husemann, Ricardo Ayala, Humberto Moo-Valle, Rémy Vandame & Robert J. Paxton
Traditional tropical agriculture often entails a form of slash-and-burn land management that may adversely affect ecosystem services such as pollination, which are required for successful crop yields. The Yucatán Peninsula of Mexico has a >4000 year history of traditional slash-and-burn agriculture, termed ‘milpa’. Hot ‘Habanero’ chilli is a major pollinator-dependent crop that nowadays is often grown in monoculture within the milpa system. We studied 37 local farmers’ chilli fields (sites) to evaluate the effects of...

Data from: Differences in nitrogen cycling between tropical dry forests with contrasting precipitation revealed by stable isotopes of nitrogen in plants and soils

Anaitzi Rivero-Villar, Pamela H. Templer, Víctor Parra-Tabla, Julio Campo. & Julio Campo
Despite the known links between climate and biogeochemical cycling of N in tropical forests, fundamental knowledge of N cycling is still far from complete. Our objective was to ascertain differences in the N cycle of two tropical dry forests under contrasting precipitation regime (1240 or 642 mm of mean annual rainfall). To do so, we examined a short-term metric of N cycling (N concentration) and a more integrated metric of N cycling (natural abundance 15N)...

Data from: Traits underlying community consequences of plant intra-specific diversity

Luis Abdala-Roberts, Riley Pratt, Jessica D. Pratt & Kailen A. Mooney
A plant’s performance and interactions with other trophic levels are recorgnized to be contingent upon plant diversity and underlying associational dynamics, but far less is known about the plant traits driving such phenomena. We manipulated diversity in plant traits using pairs of plant and a substitutive design to elucidate the mechanisms underlying diversity effects operating at a fine spatial scale. Specifically, we measured the effects of diversity in sex (sexual monocultures vs. male and female...

Data from: Deltamethrin resistance in Aedes aegypti results in treatment failure in Merida, Mexico

Gonzalo M. Vazquez-Prokopec, Anuar Medina-Barreiro, Azael Che-Mendoza, Felipe Dzul-Manzanilla, Fabian Correa-Morales, Guillermo Guillermo-May, Wilbert Bibiano-Marin, Valentin Uc-Puc, Eduardo Geded-Moreno, Jose Vadillo-Sanches, Jorge Palacio-Vargas, Scott A. Ritchie, Audrey Lenhart, Pablo Manrique-Saide & José Vadillo-Sánchez
The operational impact of deltamethrin resistance on the efficacy of indoor insecticide applications to control Aedes aegypti was evaluated in Merida, Mexico. A randomized controlled trial quantified the efficacy of indoor residual spraying (IRS) against adult Ae. aegypti in houses treated with either deltamethrin (to which local Ae. aegypti expressed a high degree of resistance) or bendiocarb (to which local Ae. aegypti were fully susceptible) as compared to untreated control houses. All adult Ae. aegypti...

Integrating floral trait and flowering time distribution patterns help reveal a more dynamic nature of co-flowering community assembly processes

Victor Parra-Tabla, Cristopher Albor-Pinto & Gerardo Arceo-Gómez
Species’ floral traits and flowering times are known to be the major drivers of pollinator-mediated plant-plant interactions in diverse co-flowering communities. However, their simultaneous role in mediating plant community assembly and plant-pollinator interactions is still poorly understood. Since not all species flower at the same time, inference of facilitative and competitive interactions based on floral trait distribution patterns should account for fine phenological structure (intensity of flowering overlap) within co-flowering communities. Such an approach may...

Data from: Selection of floral traits by pollinators and seed predators during sequential life history stages

Diane Campbell, Mascha Bischoff, Robert Raguso, Heather Briggs & Paula Sosenski
Organismal traits often influence fitness via interactions with multiple species. That selection is not necessarily predictable from pairwise interactions, such as when interactions occur during different lifecycle stages. Theoretically, directional selection during two sequential episodes, e.g., pollination and seed survival, can generate quadratic or correlational selection for a set of traits that passes both selective filters. We compared strength of selection during pollination versus seed predation in the field and tested whether interactions with multiple...

Data from: Conservation genetics of Neotropical pollinators revisited: microsatellite analysis suggests that diploid males are rare in orchid bees

Rogério Souza, Marco Del Lama, Marcelo Cervini, Norma Mortari, Thomas Eltz, Yvonne Zimmermann, Carola Bach, Berry Brosi, Sevan Suni, Javier Quezada & Robert Paxton
Allozyme analyses have suggested that Neotropical orchid bee (Euglossini) pollinators are vulnerable because of putative high frequencies of diploid males, a result of loss of sex allele diversity in small hymenopteran populations with single locus complementary sex determination. Our analysis of 1010 males from 27 species of euglossine bees sampled across the Neotropics at 2-11 polymorphic microsatellite loci revealed only 5 diploid males at an overall frequency of 0.005 (95% CIs 0.002-0.010); errors through genetic...

Data from: Post-glacial habitat release and incipient speciation in the genus Delphinus

Iris Segura-García, Juan Pablo Gallo, Susan Chivers, Raúl Díaz-Gamboa & A. Rus Hoelzel
The role of ecological and changing environmental factors in the radiation of species diversity is a fundamental question in evolutionary biology. Of particular interest is the potential for these factors to determine the boundary between what we would consider differentiation among populations and incipient speciation. Dolphins in the genus Delphinus provide a useful test case, exhibiting morphological variation in beak length, coloration and body size across their wide geographic distribution, and in particular among coastal...

Data from: Interactions between plant defence signalling pathways: evidence from bioassays with insect herbivores and plant pathogens

Xoaquin Moreira, Luis Abdala-Roberts & Bastien Castagneyrol
1. Sequential damage by attackers is hypothesized to result in reciprocal antagonism (cross-talk) between jasmonic acid (JA) and salicylic acid (SA) defence signalling pathways in plants. However, evidence for this cross-talk is not universal and several studies have found positive (synergistic) or no interaction whatsoever between JA and SA pathways. 2. Here we conducted a meta-analysis of studies on plant-mediated effects of initial attackers on performance of subsequent attackers to test the hypothesis of cross-talk...

Data from: Larval density mediates knockdown resistance to pyrethroid insecticides in adult Aedes aegypti

Marissa K. Grossman, Valentin Uc-Puc, Adriana E. Flores, Pablo C. Manrique-Saide & Gonzalo M. Vazquez-Prokopec
Background: Understanding mechanisms driving insecticide resistance in vector populations remains a public health priority. To date, most research has focused on the genetic mechanisms underpinning resistance, yet it is unclear what role environmental drivers may play in shaping phenotypic expression. One of the key environmental drivers of Aedes aegypti mosquito population dynamics is resource-driven intraspecific competition at the larval stage. We experimentally investigated the role of density-dependent larval competition in mediating resistance evolution in Ae....

Data from: Extending null scenarios with Faddy distributions in a probabilistic randomization protocol for presence-absence data

Jorge Navarro Alberto, Bryan Manly & Kenneth Gerow
1. The analysis of species occurrences at discrete locations makes use of statistical methods intended to elucidate whether a random process can explain a particular observed pattern of presences-absences (1-0). Various statistical methods have contributed to the development of null model analysis of (1-0) data in community ecology using randomization tests. Frequentist techniques assuming probability distributions under the null scenarios have been proposed, as in the work by Navarro and Manly (2009) (NM), a protocol...

Transcriptomic signatures of ageing vary in solitary and social forms of an orchid bee

Alice Séguret, Eckart Stolle, Fernando Fleites-Ayil, Javier Quezada-Euán, Klaus Hartfelder, Karen Meusemann, Mark Harrison, Antonella Soro & Robert Paxton
Eusocial insect queens are remarkable in their ability to maximise both fecundity and longevity, thus escaping the typical trade-off between these two traits. Several mechanisms have been proposed to underlie the remoulding of the trade-off, such as reshaping of the juvenile hormone pathway, or caste-specific susceptibility to oxidative stress. However, it remains a challenge to disentangle the molecular mechanisms underlying the remoulding of the trade-off in eusocial insects from caste-specific physiological attributes that have subsequently...

Effects of soil salinity on the expression of direct and indirect defences in wild cotton (Gossypium hirsutum)

Luis Abdala-Roberts, Teresa Quijano-Medina, Ted Turlings, Paula Sosenski, Luca Grandi, Jose Cervera & Xoaquin Moreira
Previous studies have reported effects of abiotic factors on herbivore-induced plant defences based on effects on single plant traits. However, plants commonly express multiple defences simultaneously and these traits are often correlated. Thus, a fuller understanding of abiotic-context dependency in plant defence requires measuring multiple traits and addressing their patterns of correlated expression. We evaluated the effects of soil salinity on the induction of direct (phenolic compounds, gossypol gland density) and indirect (volatile organic compounds,...

Pollen transfer networks reveal alien species as main heterospecific pollen donors with fitness consequences for natives

Victor Parra-Tabla, Conchita Alonso, Tia-Lynn Ashman, Robert Raguso, Cristopher Albor, Paula Sosenski, Diego Carmona & Gerardo Arceo-Gómez
The ecological dynamics of co-flowering communities are largely mediated by pollinators. However, current understanding of pollinator-mediated interactions primarily relies on how co-flowering plants influence attraction of shared pollinators, and much less is known about plan-plant interactions that occur via heterospecific pollen (HP) transfer. Invaded communities in particular can be highly affected by the transfer of alien pollen, but the strength, drivers, and fitness consequences of these interactions at a community scale are not well understood....

Beyond leaf habit: generalities in plant function across 97 tropical dry forest tree species

German Vargas G., Tim J. Brodribb, Juan M. Dupuy, Roy González‐M., Catherine M. Hulshof, David Medvigy, Tristan A. P. Allerton, Camila Pizano, Beatriz Salgado‐Negret, Naomi B. Schwartz, Skip J. Van Bloem, Bonnie G. Waring & Jennifer S. Powers
Leaf habit has been hypothesized to define a linkage between the slow-fast plant economic spectrum and the drought resistance-avoidance trade-off in tropical forests (‘slow-safe versus fast-risky’). However, variation in hydraulic traits as a function of leaf habit has rarely been explored for a large number of species. We sampled leaf and branch functional traits of 97 tropical dry forest tree species from four sites to investigate whether patterns of trait variation varied consistently in relation...

Data from: Transcriptomic analysis of skin pigmentation variation in the Virginia opossum (Didelphis virginiana).

Sergio F. Nigenda-Morales, Yibo Hu, James Beasley, Hugo A. Ruiz-Piña, David Valenzuela-Galván, Robert K. Wayne & James C. Beasley
Skin and coat pigmentation are two of the best-studied examples of traits under natural selection given their quantifiable fitness interactions with the environment (e.g. camouflage) and signaling with other organisms (e.g. warning coloration). Previous morphological studies have found that skin pigmentation variation in the Virginia opossum (Didelphis virginiana) is associated with variation in precipitation and temperatures across its distribution range following Gloger’s rule (lighter pigmentation in temperate environments). To investigate the molecular mechanism associated with...

Data from: Tropical tree diversity mediates foraging and predatory effects of insectivorous birds

Colleen S. Nell, Luis Abdala-Roberts, Victor Parra-Tabla & Kailen A. Mooney
Biodiversity affects the structure of ecological communities, but little is known about the interactive effects of diversity across multiple trophic levels. We used a large-scale forest diversity experiment to investigate the effects of tropical tree species richness on insectivorous birds, and the subsequent indirect effect to predation rates by birds. Diverse plots (4 tree species) had higher bird abundance (61%), phylogenetic diversity (61%), and functional diversity (55%) than predicted based on single-species monocultures, which corresponded...

Data from: Genetic determinants for gestational diabetes mellitus and related metabolic traits in Mexican women

Alicia Huerta-Chagoya, Paola Vázquez-Cárdenas, Hortensia Moreno-Macías, Leonardo Tapia-Maruri, Rosario Rodríguez-Guillén, Erika López-Vite, Guadalupe García-Escalante, Fernando Escobedo-Aguirre, Adalberto Parra-Covarrubias, Roberto Cordero-Brieño, Lizette Manzo-Carrillo, Rogelio Zacarías-Castillo, Carlos Vargas-García, Carlos Aguilar-Salinas & Teresa Tusié-Luna
Epidemiological and physiological similarities among Gestational Diabetes Mellitus (GDM) and Type 2 Diabetes (T2D) suggest that both diseases, share a common genetic background. T2D risk variants have been associated to GDM susceptibility. However, the genetic architecture of GDM is not yet completely understood. We analyzed 176 SNPs for 115 loci previously associated to T2D, GDM and body mass index (BMI), as well as a set of 118 Ancestry Informative Markers (AIMs), in 750 pregnant Mexican...

Data from: Tree species diversity alters plant defence investment in an experimental forest plantation in Southern Mexico

Silvia Rosado-Sánchez, Víctor Parra-Tabla, David Betancur-Ancona, Xoaquín Moreira & Luis Abdala-Roberts
The effects of plant species diversity on plant traits conferring herbivore resistance (e.g., chemical defences), as well as the mechanisms underlying such effects, have received little attention. One potential mechanism for diversity effects on plant defences is that increased plant growth at high diversity could lead to reduced investment in defences via growth-defence trade-offs. We measured tree growth (diameter at breast height) and collected leaves for quantification of total phenolics on 2.5-year old plants of...

Data from: Latitudinal variation in plant chemical defences drives latitudinal patterns of leaf herbivory

Xoaquón Moreira, Bastien Castagneyrol, Luis Abdala-Roberts, Jorge C. Berny-Mier Y Terán, Bart G. H. Timmermans, Hans Henrik Kehlet Bruun, Felisa Covelo, Gaétan Glauser, Sergio Rasmann, Ayco J. M. Tack & Hans Henrik Bruun
A long-standing paradigm in ecology holds that herbivore pressure and thus plant defences increase towards lower latitudes. However, recent work has challenged this prediction where studies have found no relationship or opposite trends where herbivory or plant defences increase at higher latitudes. Here we tested for latitudinal variation in herbivory, chemical defences (phenolic compounds), and nutritional traits (phosphorus and nitrogen) in leaves of a long-lived tree species, the English oak Quercus robur. We further investigated...

Data from: Restoration of pyrethroid susceptibility in a highly resistant Aedes aegypti population

Marissa K. Grossman, Valentin Uc-Puc, Julian Rodriguez, David J. Culter, Levi T. Morran, Pablo Manrique-Saide, Gonzalo M. Vazquez-Prokopec & David J. Cutler
Insecticide resistance has evolved in disease vectors worldwide, creating the urgent need to either develop new control methods or restore insecticide susceptibility to regain the use of existing tools. Here we show that phenotypic susceptibility can be restored in a highly resistant field-derived strain of Aedes aegypti in only ten generations through rearing them in the absence of insecticide.

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  • 2010

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  • Autonomous University of Yucatán
  • Misión Biológica de Galicia
  • University of Neuchâtel
  • Emory University
  • Stanford University
  • Queen's University Belfast
  • Federal University of São Carlos
  • National Autonomous University of Mexico
  • Louis Bolk Instituut
  • Universidad Autónoma Metropolitana