8 Works

The more the merrier: evaluating managed pollinators in highbush blueberry

Walter Farina, Maria Estravis Barcala, Florencia Palottini, Ivana Macri, Denise Nery & Walter Farina
As the global stock of Apis mellifera colonies is growing slower than agricultural demands for pollination services, there is great interest in managing alternative species. Highbush blueberry floral morphology limits the access of bees to nectar and pollen, requiring growers to rent a considerable number of beehives. Recently, the South American bumblebee Bombus pauloensis is increasingly managed alongside honeybees. Herein, we evaluated their foraging patterns, in relation to the potential pollen transfer between two blueberry...

Mowing does not redress the negative effect of nutrient addition on alpha and beta diversity in a temperate grassland

Cecilia Denisse Molina
Species loss due to an increasing number of added nutrients has been explained by both light competition through biomass increase and by niche dimension reduction as a result of species specific limiting soil resources trade-offs. Disturbances, by reducing community biomass, species dominance and increasing light availability, may counteract above ground nutrient effects. However, it is unknown if diversity loss at local or spatial scales generated by increasing number of added nutrients can be redressed with...

Protection offered by leaf fungal endophytes to an invasive species against native herbivores depends on soil nutrients

Pamela Graff, Pedro Gundel, Adriana Salvat, Diego Cristos & Enrique Chaneton
1. Natural grassland ecosystems are increasingly threatened by excessive loadings of nutrients and by the presence of species bred for high productivity. By manipulating grazing regimes and nutrient availability, agricultural practices facilitate the establishment and spread of certain forage plant species outside managed landscapes, challenging local biodiversity. The ecological success of some species in the invaded range sometimes seems to be associated with the symbiosis with foliar fungal endophytes. Symbiotic fungi may increase the competitiveness...

Song parameters, repertoire size and song sharing within and across age classes in the saffron finch

Maria Juliana Benitez Saldivar, Carolina Isabel Miño & Viviana Massoni
Birds sing mostly to attract partners or to defend territories or resources. In relation to the first function, song can vary with age if older experienced males signal their quality through their vocal output. Regarding the second function, song can also vary with age if singing behavior helps mediate social interactions through repertoire sharing with neighbors. Here, we investigate whether song parameters change with age, and in which direction, in saffron finches Sicalis flaveola pelzelni,...

Global patterns of rainfall partitioning by invasive woody plants

Juan Ignacio Whitworth-Hulse, Patricio N. Magliano, Sebastián R. Zeballos, Sebastián Aguiar & Germán Baldi
Aim: Invasive species have the potential to alter hydrological processes by changing the local water balance. However, general patterns of how rainfall is partitioned into interception, throughfall and stemflow for invasive species worldwide have been seldom explored. We (a) describe the percentage of interception, throughfall and stemflow for the invasive woody plant species; (b) analyse the influence of morphological attributes (i.e., life-form, bark roughness, leaf type, leaf phenology and leaf area index) of invasive species...

Data from: Selection on fruit traits is mediated by the interplay between frugivorous birds, fruit flies, parasitoid wasps, and seed-dispersing ants

Facundo Palacio, Adam Siepielski, Mariela Lacoretz & Mariano Ordano
Every organism on Earth must cope with a multitude of species interactions both directly and indirectly throughout its life cycle. However, how selection from multiple species occupying different trophic levels affects diffuse mutualisms has received little attention. As a result, how a given species amalgamates the combined effects of selection from multiple mutualists and antagonists to enhance its own fitness remains little understood. We investigated how multispecies interactions (frugivorous birds, ants, fruit flies, and parasitoid...

Species complex diversification by host plant use in an herbivorous insect: The source of Puerto Rican cactus mealybug pest and implications for biological control

Daniel Poveda-Martínez, María Aguirre, Guillermo Logarzo, Stephen D. Hight, Serguei Triapitsyn, Hilda Diaz-Soltero, Marcelo Vitorino & Esteban Hasson
Cryptic taxa have often been observed in the form of host‐associated species that diverged as the result of adaptation to alternate host plants. Untangling cryptic diversity in species complexes that encompass invasive species is a mandatory task for pest management. Moreover, investigating the evolutionary history of a species complex may help to understand the drivers of their diversification. The mealybug Hypogeococcus pungens was believed to be a polyphagous species from South America and has been...

Metapopulation dynamics and foraging plasticity in a highly vagile seabird, the southern rockhopper penguin

Nicolas Lois, Leonardo Campagna, Ulises Balza, Michael Polito, Klemens Pütz, Juliana Vianna, Annick Morgenthaler, Esteban Frere, Ricardo Saenz-Samaniego, Andrea Raya Rey & Bettina Mahler
Population connectivity is driven by individual dispersal potential and modulated by natal philopatry. In seabirds, high vagility facilitates dispersal yet philopatry is also common, with foraging area overlap often correlated with population connectivity. We assess the interplay between these processes by studying past and current connectivity and foraging niche overlap among southern rockhopper penguin colonies of the coast of southern South America using genomic and stable isotope analyses. We found two distinct genetic clusters and...

Registration Year

  • 2020
    8

Resource Types

  • Dataset
    8

Affiliations

  • University of Buenos Aires
    8
  • National University of Córdoba
    2
  • National University of San Luis
    1
  • United States Department of Agriculture
    1
  • National University of La Plata
    1
  • National University of Austral Patagonia
    1
  • National Scientific and Technical Research Council
    1
  • University of California, Riverside
    1
  • Instituto de Biología Subtropical
    1
  • Fundación Miguel Lillo
    1