Changing diets over time: knock-on effects of marine megafauna overexploitation on their competitors in the South-Western Atlantic OceanMaria Bas, Angélica M. Tivoli, Ivan Briz I Godino, Mónica Salemme, Fernando Santiago, Juan Bautista Belardi, Florencia Borella, Damián G. Vales, Enrique A. Crespo & Luis Cardona
This study compares the δ15N values and the trophic position of two seabird species throughout the Late Holocene in three regions in the South-Western Atlantic Ocean to assess the hypothesis that the decimation of megafauna lead to changes in the trophic position of mesopredators. Modern and ancient mollusc shells were also analysed to account for changes in the isotopic baseline through time. Results revealed that modern Magellanic penguins have higher δ15N values than their ancient...
The Inter-Sectoral Impact Model Intercomparison Project (ISIMIP) provides a framework for the collation of a set of consistent, multi-sector, multi-scale climate-impact simulations, based on scientifically and politically relevant historical and future scenarios. This framework serves as a basis for robust projections of climate impacts, as well as facilitating model evaluation and improvement, allowing for advanced estimates of the biophysical and socio-economic impacts of climate change at different levels of global warming. It also provides a...
Large migrant inflows have in the past spurred anti-immigrant sentiment, but is there a way small inflows can have a different impact? In this paper, we exploit the redistribution of migrants in the aftermath of the dismantling of the “Calais Jungle” in France to study the impact of the exposure to few migrants. Using an instrumental variables approach, we find that in the presence of a migrant center (CAO), the percentage growth rate of vote...
The non-dereliction in evolution: Trophic specialisation drives convergence in the radiation of red devil spiders (Araneae: Dysderidae) in the Canary IslandsAdrià Bellvert, Silvia Adrián-Serrano, Nuria Macías-Hernández, Søren Toft, Antigoni Kaliontzopoulou & Miquel A. Arnedo
Natural selection plays a key role in deterministic evolution, as clearly illustrated by adaptive radiations. Unlike most spiders, Dysdera species display a high variability of cheliceral morphologies, which has been suggested to reflect different levels of specialisation to feed on isopods. In this study, we integrate geometric morphometrics and experimental trials with a fully resolved phylogeny of the highly diverse endemic species from the Canary Islands to (1) characterize cheliceral morphologies, (2) unravel their dietary...
Insulin secretion from pancreatic β-cells is essential for glucose homeostasis. An insufficient response to the demand for insulin results in diabetes. We previously showed that β-cell-specific deletion of Zfp148 (β-Zfp148KO) improves glucose tolerance and insulin secretion in mice. Here, we performed Ca2+ imaging of islets from β‑Zfp148KO and control mice on both a chow and a Western-style diet. β-Zfp148KO islets demonstrate improved sensitivity and sustained Ca2+ oscillations in response to elevated glucose. β-Zfp148KO islets also...
Dugesia (Tricladida, Platyhelminthes) Cox1, 18S, 28S, ITS-1, DUNUC3, DUNUC5 datasets for worldwide biogeographic studyMarta Riutort & Eduard Solà
Aim: Freshwater planarians may have a wide geographic range despite their assumed low vagility. Found across four continents, Dugesia may have either an ancient origin on a large paleo landmass, followed by colonisation in different regions before continental fragmentation, or a more recent origin and subsequent transoceanic dispersal. We seek to resolve between these two hypotheses. Location: Africa, Eurasia, and Australasia Taxon: Genus Dugesia (Platyhelminthes: Tricladida: Dugesiidae) Methods: We used data from the sequencing of...
The climate variability hypothesis posits that increased environmental thermal variation should promote species with broader thermal tolerance breadths, while stable environments should promote thermal specialists. This hypothesis has been tested on large spatial scales, such as latitude and elevation, but less so on smaller scales which reflect the experienced microclimate. Here, we estimated thermal tolerance limits of 75 species of amphibian tadpoles from an aseasonal tropical mountain range of the Ecuadorian Andes, distributed along a...
Human impacts, particularly nutrient pollution and land-use change, have caused significant declines in the quality and quantity of freshwater resources. Most global assessments have concentrated on species diversity and composition, but effects on the multifunctionality of streams and rivers remain unclear. Here, we analyse the most comprehensive compilation of stream ecosystem functions to date to provide an overview of the responses of nutrient uptake, leaf litter decomposition, ecosystem productivity, and food web complexity to six...
Tree growth response to drought partially explains regional-scale growth and mortality patterns in Iberian forestsAntonio Gazol, J. Julio Camarero, Raúl Sánchez-Salguero, Miguel A. Zavala, Xavier Serra-Maluquer, Emilia Gutiérrez, Martín De Luis, Gabriel Sangüesa-Barreda, Klemen Novak, Vicente Rozas, Pedro A. Tíscar, Juan C. Linares, Edurne Martínez Del Castillo, Montse Ribas, Ignacio García-González, Fernando Silla, Álvaro Camison, Mar Génova, José M. Olano, Ana-Maria Hereş, Jorge Curiel Yuste, Luis A. Longares, Andrea Hevia, J. Diego Galván & Paloma Ruiz-Benito
To quantify responses to drought from different data sources we take advantage of an extensive network of cross-dated tree-ring data with increment cores from 16 tree species sampled across the Spanish Iberian Peninsula (hereafter abbreviated as RWI-net), and of the Spanish National Forest Inventory (hereafter abbreviated as NFI) sampling tree and plot level data each km in forested areas. We selected the five most severe droughts that have affected each selected RWI-net population in the...
University of Barcelona10
Helmholtz Centre for Environmental Research2
German Institute for Global and Area Studies1
Estación Biológica de Doñana1
Basque Centre for Climate Change1
National Institute of Environmental Health Sciences1
Technical University in Zvolen1
Centre for Ecology & Hydrology1
University of Zaragoza1
Radboud University Nijmegen1