152 Works

Data from: Field validation of radar systems for monitoring bird migration

Cecilia Nilsson, Adriaan M. Dokter, Baptiste Schmid, Martina Scacco, Liesbeth Verlinden, Johan Bäckman, Günther Haase, Giacomo Dell'Omo, Jason W. Chapman, Hidde Leijnse & Felix Liechti
1. Advances in information technology are increasing the use of radar as a tool to investigate and monitor bird migration movements. We set up a field campaign to compare and validate outputs from different radar systems. 2. Here we compare the pattern of nocturnal bird migration movements recorded by four different radar systems at a site in southern Sweden. Within the range of the weather radar (WR) Ängelholm, we operated a “BirdScan” (BS) dedicated bird...

Data from: The positive side of a negative reference: the delay between linguistic processing and common ground

Edmundo Kronmüller, Ira Noveck, Natalia Rivera, Francisco Jaume-Guazzini & Dale Barr
Interlocutors converge on names to refer to entities. For example, a speaker might refer to a novel looking object as the jellyfish and, once identified, the listener will too. The hypothesized mechanism behind such referential precedents is a subject of debate. The common ground view claims that listeners register the object as well as the identity of the speaker who coined the label. The linguistic view claims that, once established, precedents are treated by listeners...

Data from: The oldest actinopterygian highlights the cryptic early history of the hyperdiverse ray-finned fishes

Jing Lu, Sam Giles, Matt Friedman, Jan L. Den Blaauwen & Min Zhu
Osteichthyans comprise two divisions, each containing over 32,000 living species: Sarcopterygii (lobe-finned fishes and tetrapods) and Actinopterygii (ray-finned fishes). Recent discoveries from China highlight the morphological disparity of early sarcopterygians and extend their origin into the late Silurian. By contrast, the oldest unambiguous actinopterygians are roughly 30 million years younger, leaving a long temporal gap populated by fragments and rare body fossils of controversial phylogenetic placement. Here we reinvestigate the enigmatic osteichthyan Meemannia from the...

Data from: Seven common mistakes in population genetics and how to avoid them

Patrick Meirmans & Patrick G. Meirmans
As the data resulting from modern genotyping tools are astoundingly complex, genotyping studies require great care in the sampling design, genotyping, data analysis and interpretation. Such care is necessary because, with data sets containing thousands of loci, small biases can easily become strongly significant patterns. Such biases may already be present in routine tasks that are present in almost every genotyping study. Here, I discuss seven common mistakes that can be frequently encountered in the...

Data from: Active prey mixing as an explanation for polyphagy in predatory arthropods: synergistic dietary effects on egg production despite a behavioural cost

Renata Vieira Marques, Renato Almeida Sarmento, Felipe Lemos, Marçal Pedro-Neto, Maurice W. Sabelis, Madelaine Venzon, Angelo Pallini & Arne Janssen
1.Mixing of prey that differ in nutrient content or toxic compounds (dietary mixing) may allow synovigenic predatory arthropods to balance their diet or dilute toxins of different prey items to maximize performance: dietary mixing may therefore explain the prevalence of polyphagy in this functional group. 2.Several predatory arthropods can redress nutritional imbalances in their diet by actively mixing different diets, based on experiments with artificial diets or with prey that were manipulated to contain different...

Data from: Modelling flight heights of lesser black-backed gulls and great skuas from GPS: a Bayesian approach

Viola H. Ross-Smith, Chris B. Thaxter, Elizabeth A. Masden, Judy Shamoun-Baranes, Niall H. K. Burton, Lucy J. Wright, Mark M. Rehfisch & Alison Johnston
Wind energy generation is increasing globally, and associated environmental impacts must be considered. The risk of seabirds colliding with offshore wind turbines is influenced by flight height, and flight height data usually come from observers on boats, making estimates in daylight in fine weather. GPS tracking provides an alternative and generates flight height information in a range of conditions, but the raw data have associated error. Here, we present a novel analytical solution for accommodating...

Data from: Historical colonization and dispersal limitation supplement climate and topography in shaping species richness of African lizards (Reptilia: Agaminae)

W. Daniel Kissling, Anne Blach-Overgaard, Roelof E. Zwaan & Philipp Wagner
To what extent deep-time dispersal limitation shapes present-day biodiversity at broad spatial scales remains elusive. Here, we compiled a continental dataset on the distributions of African lizard species in the reptile subfamily Agaminae (a relatively young, Neogene radiation of agamid lizards which ancestors colonized Africa from the Arabian peninsula) and tested to what extent historical colonization and dispersal limitation (i.e. accessibility from areas of geographic origin) can explain present-day species richness relative to current climate,...

Plant dispersal strategies of high tropical alpine communities across the Andes

Carolina Tovar, Inga Melcher, Buntarou Kusumoto, Francisco Cuesta, Antoine Cleef, Rosa Isela Meneses, Stephan Halloy, Luis Daniel Llambi, Stephan Beck, Priscilla Muriel, Ricardo Jaramillo, Jorge Jacome & Julieta Carilla
• Dispersal is a key ecological process that influences plant community assembly. Therefore, understanding whether dispersal strategies are associated with climate is of utmost importance, particularly in areas greatly exposed to climate change. We examined alpine plant communities located in the mountain summits of the tropical Andes across a 4000 km latitudinal gradient. We investigated species dispersal strategies and tested their association with climatic conditions and their evolutionary history. • We used dispersal-related traits (dispersal...

Beyond the group: how food, mates and group size influence inter-group encounters in wild bonobos

Stefano Lucchesi, Leveda Cheng, Karline Janmaat, Roger Mundry, Anne Pisor & Surbeck Martin
In social-living animals, interactions between groups are frequently agonistic, but they can also be tolerant and even cooperative. Inter-group tolerance and cooperation are regarded as a crucial step in the formation of highly-structured multilevel societies. Behavioral ecological theory suggests that inter-group tolerance and cooperation can emerge either when the costs of hostility outweigh the benefits of exclusive resource access, or when both groups gain fitness benefits through their interactions. However, the factors promoting inter-group tolerance...

Data from: Projecting consequences of global warming for the functional diversity of fleshy-fruited plants and frugivorous birds along a tropical elevational gradient

Larissa Nowak, W. Daniel Kissling, Irene M. A. Bender, D. Matthias Dehling, Till Töpfer, Katrin Böhning-Gaese & Matthias Schleuning
Aim: Species in ecological communities are linked by biotic interactions. It is therefore important to simultaneously study the impacts of global warming on interdependent taxa from different trophic levels. Here, we quantify current and potential future associations of functional diversity (based on multiple traits) and functional identity (based on individual traits) between interacting taxa using projection models under climate change. Location: A tropical elevational gradient (500–3500 m a.s.l.) in the Manú biosphere reserve, southeast Peru...

Shorebird feeding specialists differ in how environmental conditions alter their foraging time

Henk-Jan Van Der Kolk, Bruno J. Ens, Kees Oosterbeek, Willem Bouten, Andrew M. Allen, Magali Frauendorf, Thomas K. Lameris, Thijs Oosterbeek, Symen Deuzeman, Kelly De Vries, Eelke Jongejans & Martijn Van De Pol
Feeding specialisation is a common cause of individual variation. Fitness payoffs of specialisation vary with environmental conditions, but the underlying behavioural mechanisms are poorly understood. Such mechanistic knowledge, however, is crucial to reliably predict responses of heterogeneous populations to environmental change. We quantified spatiotemporal allocation of foraging behaviour in wintering Eurasian oystercatchers (Haematopus ostralegus), a species in which feeding specialisation can be inferred from bill shape. We combined GPS and accelerometer data to quantify foraging...

Data from: Human occupation and ecosystem change on Upolu (Samoa) during the Holocene

William Gosling, David Sear, Jonathan Hassall, Pete Langdon, Mick Bönnen, Tessa Driessen, Zoë Van Kemenada, Kevin Noort, Melanie Leng, Ian Croudace, Anna Bourne & Crystal McMichael
Aim To track the peopling of the South Pacific and assess their impact on terrestrial and aquatic ecosystems. Location Upolu, Samoa. Taxon Ancient charcoal, pollen, sprores, algae and cyanobacteria types are recorded. Methods A sedimentary record covering the last c. 10,500 years was recovered from the volcanic crater that contains Lake Lanoto'o near the centre of Upolu Island. Information on past ecological change was obtained from microscopic and macroscopic remains extracted from the sediments: charcoal...

Data from: Aeroecology meets aviation safety: early warning systems in Europe and the Middle East prevent collisions between birds and aircraft

Hans Van Gasteren, Karen L. Krijgsveld, Nadine Klauke, Yossi Leshem, Isabel C. Metz, Michal Skakuj, Serge Sorbi, Inbal Schekler & Judy Shamoun-Baranes
The aerosphere is utilized by billions of birds, moving for different reasons and from short to great distances spanning tens of thousands of kilometres. The aerosphere, however, is also utilized by aviation which leads to increasing conflicts in and around airfields as well as en-route. Collisions between birds and aircraft cost billions of euros annually and, in some cases, result in the loss of human lives. Simultaneously, aviation has diverse negative impacts on wildlife. During...

Data from: Functional biogeography of dietary strategies in birds

Jean-Yves Barnagaud, Nathan Mazet, François Munoz, Matthias Grenié, Pierre Denelle, Mar Sobral, W. Daniel Kissling, Çağan H. Sekercioglu & Cyrille Violle
Aim: Diet is key to understanding species’ resource use, relationships with their environment and biotic interactions. We aimed to identify the major strategies that shape birds’ diet space, and to investigate their spatial distributions in association with biogeographic, bioclimatic and anthropogenic drivers. Location: Global Time period: Current Major taxa studied: Birds Methods: We analysed score-based assessments of eight diet categories for 8937 out of 10964 extant bird species. We constructed a multivariate diet space by...

Data from: No signal of deleterious mutation accumulation in conserved gene sequences of extant asexual hexapods

Alexander Brandt, Jens Bast, Stefan Scheu, Karen Meusemann, Alexander Donath, Kai Schütte, Ryuichiro Machida & Ken Kraaijeveld
Loss of sex and recombination is generally assumed to impede the effectiveness of purifying selection and to result in the accumulation of slightly deleterious mutations. Empirical evidence for this has come from several studies investigating mutational load in a small number of individual genes. However, recent whole transcriptome based studies have yielded inconsistent results, hence questioning the validity of the assumption of mutational meltdown in asexual populations. Here, we study the effectiveness of purifying selection...

Data and code for: Past and future extinctions shape the body size - fruit size relationship between palms and mammalian frugivores

Jun Ying Lim, Jens-Christian Svenning, Bastian Göldel, Søren Faurby & W. Daniel Kissling
The dispersal of seeds by mammalian frugivores influences the structure and composition of plant communities, but most ecosystems have undergone defaunation over thousands of years, a process that continues today. Understanding how past defaunation has affected fruit-frugivore interactions will thus provide insights into how ecosystems may respond to future frugivore loss. By integrating palm and mammalian frugivore trait and occurrence data worldwide, we reveal a global positive relationship between fruit size and body size of...

The brains of elite soccer players are subject to experience-dependent alterations in white matter connectivity

Zai-Fu Yao
Soccer is the only major sport with voluntary unprotected head-to-ball contact. It is crucial to determine if head impact through regular soccer sports training is manifested in brain structure and connectivity, and whether such alterations are due to sustained training per se. Using diffusion tensor imaging, we documented a comprehensive view of soccer players’ brains in a sample of twenty-five right-handed male elite soccer players aged from 18 to 22 years and twenty-five non-athletic controls...

Data from: Long-term ecological legacies in western Amazonia

Christine Åkesson, Crystal McMichael, Marco Raczka, Seringe Huisman, Johnny Vogel, Mona Palmeira, David Neill, Jason Veizaj & Mark Bush
1. Modifications of Amazonian forests by pre-Columbian peoples are thought to have left ecological legacies that have persisted to the modern day. Most Amazonian palaeoecological records do not, however, provide the required temporal resolution to document the nuanced changes of pre-Columbian disturbance or post-disturbance succession and recovery, making it difficult to detect any direct, or indirect, ecological legacies on tree species. 2. Here, we investigate the fossil pollen, phytolith, and charcoal history of Lake Kumpaka,...

Data from: A predictive model for improving placement of wind turbines to minimise collision risk potential for a large soaring raptor

Megan Murgatroyd, Willem Bouten & Arjun Amar
1. With the rapid growth of wind energy developments worldwide, it is critical that the negative impacts on wildlife are considered and mitigated. This includes minimising the numbers of large soaring raptors which are killed when they collide with wind turbines. 2. To reduce the likelihood of raptor collisions, turbines should be placed at locations which are least used by sensitive species. For resident or breeding species, this is often delineated crudely through the use...

Data from: Nocturnal foraging lifts time-constraints in winter for migratory geese but hardly speeds up fueling

Thomas Lameris, Adriaan Dokter, Henk Van Der Jeugd, Willem Bouten, Jasper Koster, Stefan Sand, Coen Westerduin & Bart Nolet
Climate warming advances the optimal timing of breeding for many animals. For migrants to start breeding earlier, a concurrent advancement of migration is required, including pre-migratory fueling of energy reserves. We investigate whether barnacle geese are time-constrained during pre-migratory fueling and whether there is potential to advance or shorten the fueling period to allow an earlier migratory departure. We equipped barnacle geese with GPS-trackers and accelerometers to remotely record birds’ behavior, from which we calculated...

2011 Machine Learning Data Set for NASA's Solar Dynamics Observatory - Atmospheric Imaging Assembly

David Fouhey, Meng Jin, Mark Cheung, Abndres Munoz-Jaramillo, Richard Galvez, Rajat Thomas, Paul Wright, Alexander Szenicer, Monica G. Bobra, Yang Liu & James Mason
We present a curated dataset from the NASA Solar Dynamics Observatory (SDO) mission in a format suitable for machine learning research. Beginning from level 1 scientific products we have processed various instrumental corrections, downsampled to manageable spatial and temporal resolutions, and synchronized observations spatially and temporally. We anticipate this curated dataset will facilitate machine learning research in heliophysics and the physical sciences generally, increasing the scientific return of the SDO mission. This work is a...

Data from: Multi-modal ultra-high resolution structural 7-Tesla MRI data repository

Birte U. Forstmann, Max C. Keuken, Andreas S. Schafer, Pierre-Louis Bazin, Anneke Alkemade & Robert Turner
Structural brain data is key for the understanding of brain function and networks, i.e., connectomics. Here we present data sets available from the ‘atlasing of the basal ganglia (ATAG)’ project, which provides ultra-high resolution 7Tesla (T) magnetic resonance imaging (MRI) scans from young, middle-aged, and elderly participants. The ATAG data set includes whole-brain and reduced field-of-view MP2RAGE and T2*-weighted scans of the subcortex and brainstem with ultra-high resolution at a sub-millimeter scale. The data can...

The role of deterministic succession during forest succession within a South African savanna

Samantha-Leigh Jamison-Daniels, Daniel Kissling, Monique Botha, Mathew Harris, Christopher Gordon & Michelle Greve
Bush encroachment can lead to a switch from open savannas to dense woodlands or forests. This has implications for both the composition of ecological communities and the provision of ecosystem services such as nutrient cycling and grazing capacity. The patterns and underlying drivers responsible for bush encroachment are not fully understood. Here, we investigate the underlying determinants of bush clump formation (a form of encroachment) in a South African savanna and explore whether bush clump...

Data from: Why time-limited individuals can make populations more vulnerable to disturbance

Henk-Jan Van Der Kolk, Bruno Ens, Magali Frauendorf, Eelke Jongejans, Kees Oosterbeek, Willem Bouten & Martijn Van De Pol
Individual variation in disturbance vulnerability (i.e. the likelihood that disturbance negatively affects an individual’s fitness) can affect how disturbance impacts animal populations, as even at low disturbance levels some individuals could be severely affected and die. Individual variation in vulnerability can arise due to different responses to disturbance. We propose a new hypothesis that even when individuals respond similarly to disturbance, time-limited individuals are more at risk that their condition deteriorates since they have limited...

Prediction of Cerebral Venous Thrombosis with a new clinical score and D-dimer levels

Mirjam R Heldner, Susanna M Zuurbier, Bojun Li, Rascha Von Martial, Joost CM Meijers, Rebekka Zimmermann, Bastian Volbers, Simon Jung, Marwan El-Koussy, Urs Fischer, Hans Peter Kohler, Verena Schroeder, Jonathan M Coutinho & Marcel Arnold
OBJECTIVE:To investigate prediction of cerebral venous thrombosis (CVT) by clinical variables and D-dimer levels. METHODS:This prospective multicentre study included consecutive patients with clinically possible CVT. On admission, patients underwent clinical examination, blood-sampling for D-dimers-measuring (ELISA-test), and MR-/CT-venography. Predictive value of clinical variables and D-dimers for CVT were calculated. A clinical score to stratify patients into groups with low, moderate, or high CVT risk was established using multivariate logistic regression. RESULTS:CVT was confirmed in 25.8% (94/359)...

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Resource Types

  • Dataset
    152

Affiliations

  • University of Amsterdam
    143
  • Nederlands Instituut voor Ecologie
    11
  • Hansen Experimental Physics Laboratory, Stanford University
    9
  • Electrical Engineering and Computer Science Department, University of Michigan
    9
  • SUPA School of Physics and Astronomy, University of Glasgow
    9
  • Aarhus University
    8
  • NASA Goddard Space Flight Center
    7
  • Wageningen University & Research
    7
  • Center for Data Science, New York University
    6
  • Lockheed Martin Solar & Astrophysics Laboratory
    6