11 Works

Taxonomy based on limited genomic markers may underestimates species diversity of rockhopper penguins and threaten their conservation

María José Frugone, Theresa Cole, María Eugenia López, Gemma Clucas, Pável Matos-Maraví, Nicolás Lois, Pierre Pistorius, Francesco Bonadonna, Phil Trathan, Andrea Polanowski, Barbara Wienecke, Andrea Raya-Rey, Klemens Pütz, Antje Steinfurth, Ke Bi, Cynthia Wang-Claypool, Rauri C. K. Bowie, Jonathan Waters, Elie Poulin & Juliana Vianna
Delimiting recently diverged species is challenging. During speciation, genetic differentiation may be distributed unevenly across the genome, as different genomic regions can be subject to different selective pressures and evolutionary histories. Reliance on limited numbers of genetic markers that may be underpowered can make species delimitation even more challenging, potentially resulting in taxonomic inconsistencies. Rockhopper penguins of the genus Eudyptes comprise three broadly recognized taxa: northern (E. moseleyi), southern (E. chrysocome), and eastern rockhopper (E....

Heat tolerance of marine ectotherms in a warming Antarctica

Enrico Rezende, Andres Molina, José Pulgar & Mauricio Carter
Global warming is affecting the Antarctic continent in complex ways. Because Antarctic organisms are specialized to living in the cold, they are vulnerable to increasing temperatures, though quantitative analyses of this issue are currently lacking. Here we compiled a total of 184 estimates of heat tolerance belonging to 39 marine species and quantified how survival is affected concomitantly by the intensity and duration of a thermal stress. Species exhibit thermal limits displaced towards colder temperatures,...

Data: Upper thermal limits and risk of mortality of coastal Antarctic ectotherms

Mauricio J Carter, M. Roberto Roberto García-Huidobro, Marcela Aldana, Enrico L. Rezende, Francisco Bozinovic, Cristobal Galban-Malagon & Jose Pulgar
Antarctic marine animals face one of the most extreme thermal environments, characterized by a stable and narrow range of low seawater temperatures. At the same time, the Antarctic marine ecosystems are threatened by accelerated global warming. Determining the upper thermal limits (CTmax) is crucial to project the persistence and distribution areas of the Antarctic marine species. Using thermal death time curves (TDT), we estimated CTmax at different temporal scales from 1 minute to daily and...

Thermal tolerance in Drosophila: repercussions for distribution, community coexistence and responses to climate change

José M. Alruiz, Ignacio Peralta-Maraver, Francisco Bozinovic, Mauro Santos & Enrico L. Rezende
Here we combined controlled experiments and field surveys to determine if estimates of heat tolerance predict distributional ranges and phenology of different Drosophila species in southern South America. We contrasted thermal death time curves, which consider both magnitude and duration of the challenge to estimate heat tolerance, against the thermal range where populations are viable based on field surveys in an 8-yr longitudinal study. We observed a strong correspondence of the physiological limits, the thermal...

Data from: The origins of global biodiversity on land, sea, and freshwater

Cristian Román-Palacios, Daniela Moraga-López & John Wiens
Many biodiversity studies focus on explaining high tropical species richness, but an equally dramatic yet understudied pattern involves the divergent richness of land, sea, and freshwater. Here, we reveal the origins of these richness differences among habitats across animals and plants. Most plant and animal species are terrestrial, although these habitats cover only ~28% of Earth’s surface. Marine habitats have fewer species over a larger area (~70%). Freshwater habitats have relatively high richness and exceptional...

Additional file 1 of Health and economic effects on patients with type 2 diabetes mellitus in the long run: predictions for the Chilean population

Manuel Antonio Espinoza, Tomas Abbott, Alvaro Passi & Carlos Balmaceda
Additional file 1: Expected costs and outcomes of the outcome based subgroup analysis.

Data from: Whiskers provide time-series of toxic and essential trace elements, Se:Hg molar ratios, and stable isotope values of an apex Antarctic predator, the leopard seal

Patrick Charapata, Casey Clark, Nathan Miller, Sarah Kienle, Daniel Costa, Michael Goebel, Heather Gunn, Emily Sperou, Shane Kanatous, Daniel Crocker, Renato Borras-Chavez & Stephen Trumble
In an era of rapid environmental change and increasing human presence, researchers need efficient tools for tracking contaminants to monitor the health of Antarctic flora and fauna. Here, we examined the utility of leopard seal whiskers as a biomonitoring tool that reconstructs time-series of significant ecological and physiological biomarkers. Leopard seals (Hydrurga leptonyx) are a sentinel species in the Western Antarctic Peninsula due to their apex predator status and top-down effects on several Antarctic species....

Alignments and phylogenetic tree from: A new endemic species of Loasa ser. Macrospermae from northern Chile

Ludovica Santilli, Nicolas Lavandero, Claire De Schrevel, Philippe Dandois & Rafael Acuña
Alignments used for the phylogenetic work and raw phylogenetic trees obtained. A new species of Loasa, endemic‌ ‌to‌ ‌the‌ ‌northern ‌Andes‌ ‌‌of‌ ‌Chile‌ is described and evaluated, under the IUCN criteria for conservation, as critically endangered. Molecular analyses based on plastid markers place the new species within the Loasa ser. Macrospermae, with high support, and specifically as sister to Loasa acerifolia. A key to and comparative plates including all the 13 known species of Loasa...

Data from: Pre-domestication bottlenecks of the cultivated seaweed Gracilaria chilensis

Oscar R. Huanel, Suany Quesada-Calderón, Cristian Ríos, Saraí Morales-González, Pablo Saenz-Agudelo, Wendy A. Nelson, Natalia Arakaki, Stéphane Mauger, Sylvain Faugeron & Marie-Laure Guillemin
Gracilaria chilensis is the main cultivated seaweed in Chile. The low genetic diversity observed in the Chilean population has been associated with the over-exploitation of natural beds and/or the founder effect that occurred during the post-glacial colonization from New Zealand. How these processes have affected its evolutionary trajectory before farming and incipient domestication is poorly understood. In this study, we used 2,232 SNPs to assess how the species' evolutionary history in New Zealand (its region...

Additional file 1 of Health and economic effects on patients with type 2 diabetes mellitus in the long run: predictions for the Chilean population

Manuel Antonio Espinoza, Tomas Abbott, Alvaro Passi & Carlos Balmaceda
Additional file 1: Expected costs and outcomes of the outcome based subgroup analysis.

Adaptive effects of parental and developmental environments on offspring survival, growth, and phenotype

Daphne Cortese, Amélie Crespel, Suzanne Mills, Tommy Norin, Shaun Killen & Ricardo Beldade
Phenotypic adjustments to environmental variation are particularly relevant to cope with putative environmental mismatches often imposed by natal dispersal. We used an inter-generational cross-transplant field-based experiment to evaluate the morphological and physiological effects of parental and post-settlement water flow environments on the orange-fin anemonefish Amphiprion chrysopterus through ontogeny (at pre- and post-settlement stages). Offspring born from parents under high water flow had an 18% higher caudal fin aspect ratio (a compound measure of shape) at...

Registration Year

  • 2022
    11

Resource Types

  • Dataset
    11

Affiliations

  • Pontifical Catholic University of Chile
    8
  • Pontificia Universidad Católica de Chile
    4
  • Baylor University
    1
  • University of Buenos Aires
    1
  • The University of Texas at Austin
    1
  • Universidad Mayor
    1
  • University of Glasgow
    1
  • University of California, Berkeley
    1
  • Instituto del Mar del Peru
    1
  • University of Otago
    1