40 Works

Dynamic feedbacks among tree functional traits, termite populations and deadwood turnover

Chao Guo, Bin Tuo, Ci Hang, Enrong Yan & Johannes H. C. Cornelissen
1. Changes in the composition of plant functional traits may affect ecosystem processes through influencing trophic interactions. Bottom-up control by plant species through food availability to animals may vary with time. However, such dynamics and their consequences for deadwood turnover are poorly known for detrital food webs. 2. We introduce a dynamic conceptual model of the feedback of (deadwood-feeding) termite populations, tree functional traits and deadwood decomposition. We hypothesized that tree functional diversity (in terms...

ISIMIP3 geographical lakes input data

Inne Vanderkelen & Jacob Schewe
The Inter-Sectoral Impact Model Intercomparison Project (ISIMIP) provides a framework for the collation of a consistent set of climate impact data across sectors and scales. It also provides a unique opportunity for considering interactions between climate change impacts across sectors through consistent scenarios.
The ISIMIP3a part of the third simulation round is dedicated to i) impact model evaluation and improvement and ii) detection and attribution of observed impacts according to the framework of IPCC AR5 Working...

Data from: Children in the Syrian civil war: the familial, educational, and public health impact of ongoing violence

Abdallah Mohamed Elsafti, Gerlant Van Berlaer, Mohammad Al Safadi, Michel Debacker, Ronald Buyl, Atef Redwan & Ives Hubloue
The Syrian civil war since 2011 has led to one of the most complex humanitarian emergencies in history. The objective of this study was to document the impact of the conflict on the familial, educational, and public health state of Syrian children. A cross-sectional observational study was conducted in May 2015. Health care workers visited families with a prospectively designed data sheet in 4 Northern Syrian governorates. The 1001 children included in this study originated...

Data from: A ketocarotenoid-based color polymorphism in the Sira poison frog Ranitomeya sirensis indicates novel gene interactions underlying aposematic signal variation

Evan Twomey, James Johnson, Santiago Castroviejo-Fisher & Ines Van Bocxlaer
The accumulation of red ketocarotenoids is an important component of coloration in many organisms, but the underlying mechanisms are poorly understood. In some organisms, ketocarotenoids are sequestered from the diet and can accumulate when enzymes responsible for carotenoid breakdown are disrupted. In other organisms, ketocarotenoids are formed endogenously from dietary precursors via oxidation reactions carried out by carotenoid ketolase enzymes. Here, we study the genetic basis of carotenoid coloration in an amphibian. We demonstrate that...

Microsatellite data of Avicennia marina from Gazi Bay, Kenya

Ludwig Triest
Mangrove ecosystems along the East African coast are often characterized by a disjunct zonation of seaward and landward Avicennia marina. This disjunct zonation may be maintained through different positions in the tidal frame, yielding different dispersal settings. The spatial configuration of the landscape and coastal processes such as tides and waves are expected to largely influence the extent of propagule transport and subsequent regeneration. We hypothesized that landward sites would keep a stronger genetic structure...

EURADOS Intercomparison on Compartmental Model for 18F-FDG Developed by Hays and Segall

Wei Bo Li, David Broggio, Augusto Giussani, Tomáš Vrba, Kerstin Hürkamp, Alexandra Kamp, Dietmar Noßke, Lara Struelens & Peter Covens
Abstract: This report was originated from the analysis of the results of a joint EURADOS-EANM project about the assessment of the external radiation dose rate to comforters and caregivers exposed to patients undergoing nuclear medical diagnostics and therapy. The compartmental model for 18F-FDG developed by Hays and Segall in 1999 was applied by EURADOS members for predicting the time activity curves (TAC) in the source organs and tissues, and the urinary excretion. Inconsistencies have been...

Data from: Nutrient availability controls the impact of mammalian herbivores on soil carbon and nitrogen pools in grasslands

Judith Sitters, E.R. Jasper Wubs, Elisabeth S. Bakker, Thomas W. Crowther, Peter B. Adler, Sumanta Bagchi, Jonathan D. Bakker, Lori Biederman, Elizabeth T. Borer, Elsa E. Cleland, Nico Eisenhauer, Jennifer Firn, Laureano Gherardi, Nicole Hagenah, Yann Hautier, Sarah E. Hobbie, Johannes M.H. Knops, Andrew S. MacDougall, Rebecca L. McCulley, Joslin L. Moore, Brent Mortensen, Pablo L. Peri, Suzanne M. Prober, Charlotte Riggs, Anita C. Risch … &
Grasslands have been subject to considerable alteration due to human activities globally, including widespread changes in populations and composition of large mammalian herbivores and elevated supply of nutrients. Grassland soils remain important reservoirs of carbon (C) and nitrogen (N). Herbivores may affect both C and N pools and these changes likely interact with increases in soil nutrient availability. Given the scale of grassland soil fluxes, such changes can have striking consequences for atmospheric C concentrations...

Microsatellite data of 14 Avicennia marina populations from Mozambique Channel area

Ludwig Triest
Mangrove forests are dynamic ecosystems found along sheltered low-lying coastal plains in warm-temperate, tropical and subtropical regions, predominantly on tidal flats, deltas, estuaries, bays, but also on oceanic atolls. These landforms present varied hydrodynamic and geomorphological settings for mangroves to establish and could influence the extent of propagule transport and subsequent regeneration. In this study, we examined whether these landform characteristics influence the genetic diversity and structure of Avicennia marina, one of the most abundant...

Timing uncertainty in collective risk dilemmas encourages group reciprocation and polarization

Elias Fernandez Domingos, Jelena Grujić, Francisco C. Santos, Juan C. Burguillo Rial, Georg Kirchsteiger, Francisco C. Santos & Tom Lenaerts
Social dilemmas are often shaped by actions involving uncertain returns only achievable in the future, such as climate action or voluntary vaccination. In this context, uncertainty may produce non-trivial effects. Here, we assess experimentally — through a collective risk dilemma — the effect of timing uncertainty, i.e. how uncertainty about when a target needs to be reached affects the participants’ behaviours. We show that timing uncertainty prompts not only early generosity but also polarised outcomes,...

Data from: Parallel tagged amplicon sequencing of transcriptome-based genetic markers for Triturus newts with the Ion Torrent next-generation sequencing platform

Ben Wielstra, Elza Duijm, Patricia Lagler, Youri Lammers, Willem R. M. Meilink, Janine M. Ziermann & Jan W. Arntzen
Next-generation sequencing is a fast and cost-effective way to obtain sequence data for non-model organisms for many markers and for many individuals. We describe a protocol through which we obtain orthologous markers for the crested newts (Amphibia: Salamandridae: Triturus), suitable for analysis of interspecific hybridization. We use transcriptome data of a single Triturus species and design 96 primer pairs that amplify c. 180 bp fragments positioned in 3-prime untranslated regions. Next these markers are tested...

Data from: Functional advantages of conserved intrinsic disorder in RNA-binding proteins

Mihaly Varadi, Fruzsina Zsolyomi, Mainak Guharoy & Peter Tompa
Proteins form large macromolecular assemblies with RNA that govern essential molecular processes. RNA-binding proteins have often been associated with conformational flexibility, yet the extent and functional implications of their intrinsic disorder have never been fully assessed. Here, through large-scale analysis of comprehensive protein sequence and structure datasets we demonstrate the prevalence of intrinsic structural disorder in RNA-binding proteins and domains. We addressed their functionality through a quantitative description of the evolutionary conservation of disordered segments...

Data from: Socio-demographic, social-cognitive, health-related and physical environmental variables associated with context-specific sitting time in Belgian adolescents: a one-year follow-up study

Cedric Busschaert, Nicola D. Ridgers, Ilse De Bourdeaudhuij, Greet Cardon, Jelle Van Cauwenberg & Katrien De Cocker
Introduction: More knowledge is warranted about multilevel ecological variables associated with context-specific sitting time among adolescents. The present study explored cross-sectional and longitudinal associations of ecological domains of sedentary behaviour, including socio-demographic, social-cognitive, health-related and physical-environmental variables with sitting during TV viewing, computer use, electronic gaming and motorized transport among adolescents. Methods: For this longitudinal study, a sample of Belgian adolescents completed questionnaires at school on context-specific sitting time and associated ecological variables. At baseline,...

Data from: Mutation accumulation is still potentially problematic, despite declining paternal age: a comment on Arslan et al. (2017).

Michael A. Woodley Of Menie, Matthew A. Sarraf & Heitor B. F. Fernandes
Icelandic mutation accumulation modelIcelandic mutation accumulation model (Ibs 0.5-0.99 and Ibs 0.35) - secondary analysis of data from Kong et al. (2012) Rate of de novo mutations and the importance of father’s age to disease risk. Nature 488, 471–475. (doi:10.1038/nature11396), Fig. 4, p.474.

Proton-transfer-reaction time-of-flight mass spectrometry (PTR-TOF-MS) as a tool for studying animal volatile organic compound (VOC) emissions

Miguel Portillo-Estrada, Charlotte Van Moorleghem, Sunita Janssenswillen, Richard Joseph Cooper, Claudia Birkemeyer, Kim Roelants & Raoul Van Damme
1. Chemical sensing in vertebrates is crucial in their lives, and efforts are undertaken towards deciphering their chemical language. Volatile organic compounds (VOCs) is a group of chemicals believed to play an essential role in a wide variety of animal interactions. Therefore, understanding what animals sense themselves and untangling the ecological role of their volatile cues can be accomplished by analysing VOC emissions. A Proton-Transfer Reaction Time-of-Flight Mass Spectrometer (PTR-TOF-MS) is an instrument that measures...

Belgium (Flanders)

Jonathan  Hendrickx , Pauljan Truyens, Karen  Donders  & Ike  Picone

Data from: Integrative taxonomy of root-knot nematodes reveals multiple independent origins of mitotic parthenogenesis

Toon Janssen, Gerrit Karssen, Olivera Topalović, Danny Coyne & Wim Bert
During sampling of several Coffea arabica plantations in Tanzania severe root galling, caused by a root-knot nematode was observed. From pure cultures, morphology and morphometrics of juveniles and females matched perfectly with Meloidogyne africana, whereas morphology of the males matched identically with those of Meloidogyne decalineata. Based on their Cox1 sequence, however, the recovered juveniles, females and males were confirmed to belong to the same species, creating a taxonomic conundrum. Adding further to this puzzle,...

Data from: What caused over a century of decline in general intelligence? Testing predictions from the genetic selection and neurotoxin hypotheses

Michael A. Woodley Of Menie, Matthew A. Sarraf, Mateo Peñaherrera-Aguirre, Heitor B.F. Fernandes & David Becker
Several converging lines of evidence indicate that general intelligence (g) has declined in Western populations. The causes of these declines are debated. Here, two hypotheses are tested: (1) selection acting against genetic variants that promote g causes the decline and (2) the presence of neurotoxic pollution in the environment causes the decline. A linear mixed model was devised to test (1) and (2), in which the secular decline in a “heritable g” (g.h) chronometric factor...

Data from: A refugee camp in the center of Europe: clinical characteristics of asylum seekers arriving in brussels

Gerlant Van Berlaer, Francisca Bohle Carbonell, Sofie Manantsoa, Xavier De Béthune, Ronald Buyl, Michel Debacker & Ives Hubloue
Background In the summer of 2015, the exodus of Syrian war refugees and saturation of refugee camps in neighboring countries led to the influx of asylum-seekers in European countries, including Belgium. This study aims to describe the demographic and clinical characteristics of asylum-seekers that arrived in a huddled refugee camp, in the center of a well-developed country with all medical facilities. Methods Using a descriptive cross-sectional study design, physicians of Médecins du Monde prospectively registered...

Data from: Functional diversity and structural disorder in the human ubiquitination pathway

Pallab Bhowmick, Rita Pancsa, Mainak Guharoy & Peter Tompa
The ubiquitin-proteasome system plays a central role in cellular regulation and protein quality control (PQC). The system is built as a pyramid of increasing complexity, with two E1 (ubiquitin activating), few dozen E2 (ubiquitin conjugating) and several hundred E3 (ubiquitin ligase) enzymes. By collecting and analyzing E3 sequences from the KEGG BRITE database and literature, we assembled a coherent dataset of 563 human E3s and analyzed their various physical features. We found an increase in...

Hidden hybridization and habitat differentiation ina Mediterranean macrophyte, the euryhaline genus Ruppia

Lise Beirinckx, Bram Vanschoenwinkel & Ludwig Triest
In many aquatic plant taxa, classification and identification based on morphology has always been difficult. Molecular markers revealed that the complexity in several of these aquatic taxa could be addressed to recurrent hybridization events and cryptic species diversity. The submerged macrophyte genus Ruppia is one of these aquatic genera with a complex taxonomy due to the absence of clear distinguishable traits and several hybridization events. Two species co-exist throughout Europe, R. maritima and R. spiralis...

Data from: Do people imitate when making decisions? - evidence from a spatial prisoners dilemma experiment

Jelena Grujic & Tom Lenaerts
How do people decide which action to take? This question is best answered using Game Theory, which has proposed a series of decision mechanisms that people potentially use. In network simulations, wherein games are repeated and payoff differences can be observed, those mechanisms rely often on imitation of successful behavior. Surprisingly, little to no evidence has been provided about whether, how and what people actually use to alter their actions in that context. By comparing...

Microsatellite genotypes and ITS2 DNA sequence data for Seriatopora hystrix

Rosa Maria Van Der Ven, Jean-François Flot, Carol Buitrago-López & Marc Kochzius
Coral reefs provide essential goods and services but are degrading at an alarming rate due to local and global anthropogenic stressors. The main limitation that prevents the implementation of adequate conservation measures is that connectivity and genetic structure of populations are poorly known. Here, the genetic diversity and connectivity of the brooding scleractinian coral, Seriatopora hystrix were assessed at two scales by genotyping ten microsatellite markers for 356 individual colonies. Seriatopora hystrix showed high differentiation,...

Robustness and Prediction Accuracy of Machine Learning for Objective Visual Quality Assessment

Andrew Hines, Paul Kendrick, Adriaan Barri, Manish Narwaria & Judith Redi

Data from: Thriving in a hostile world: insights from the dietary strategy of two allopatric, closely-related tepui summit endemic amphibians

Philippe Kok, Tessa Broholm & Dietrich Mebs
To date, there has been no published investigation on the trophic diversity in any tepui summit vertebrate. In this paper we analysed the dietary composition of a tepui summit endemic toad, Oreophrynella quelchii from Roraima-tepui, and compared it with that of O. nigra, to examine to what extent diet differs between these two sister species across isolated, although neighbouring, tepui tops. The digestive tracts of a total of 197 toads were dissected: 111 from O....

Mechanisms for color convergence in a mimetic radiation of poison frogs

Evan Twomey, Morgan Kain, Myriam Claeys, Kyle Summers, Santiago Castroviejo-Fisher & Ines Van Bocxlaer
In animals, bright colors often evolve to mimic other species when a resemblance is selectively favored. Understanding the proximate mechanisms underlying such color mimicry can give insights into how mimicry evolves, for example, whether color convergence evolves from a shared set of mechanisms or through the evolution of novel color production mechanisms. We studied color production mechanisms in poison frogs (Dendrobatidae), focusing on the mimicry complex of Ranitomeya imitator. Using reflectance spectrometry, skin pigment analysis,...

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  • Vrije Universiteit Brussel
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