239 Works

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...

Data from: Parallel diversifications of Cremastosperma and Mosannona (Annonaceae), tropical rainforest trees tracking Neogene upheaval of South America

Michael D. Pirie, Paul J.M. Maas, Rutger A. Wilschut, Heleen Melchers-Sharrott & Lars W. Chatrou
Much of the immense present day biological diversity of Neotropical rainforests originated from the Miocene onwards, a period of geological and ecological upheaval in South America. We assess the impact of the Andean orogeny, drainage of lake Pebas, and closure of the Panama Isthmus on two clades of tropical trees (Cremastosperma, c. 31 spp.; and Mosannona, c. 14 spp.; both Annonaceae). Phylogenetic inference revealed similar patterns of geographically restricted clades and molecular dating showed diversifications...

Data from: Personality and gonadal development as sources of individual variation in response to GnRH challenge in female great tits

Samuel P. Caro, Charlotte A. Cornil, Kees Van Oers & Marcel E. Visser
Seasonal timing of reproduction is a key life-history trait, but we know little about the mechanisms underlying individual variation in female endocrine profiles associated with reproduction. In birds, 17β-estradiol is a key reproductive hormone that links brain neuroendocrine mechanisms, involved in information processing and decision making, to downstream mechanisms in the liver, where egg-yolk is produced. Here we test, using a simulated induction of the reproductive system through a GnRH-challenge, whether the ovary of pre-breeding...

Data from: Glacial history of the European marine mussels Mytilus, inferred from distribution of mitochondrial DNA lineages

Artur Burzyński, Beata Śmietanka, Roman Wenne & Herman Hummel
Mussels of the genus Mytilus have been used to assess the circumglacial phylogeography of the intertidal zone. These mussels are representative components of the intertidal zone and have rapidly evolving mitochondrial DNA, suitable for high resolution phylogeographic analyses. In Europe, the three Mytilus species currently share mitochondrial haplotypes, owing to the cases of extensive genetic introgression. Genetic diversity of Mytilus edulis, Mytilus trossulus and Mytilus galloprovincialis was studied using a 900-bp long part of the...

Concurrent shifts in wintering distribution and phenology in migratory swans

Rascha Nuijten, Kevin Wood, Eileen Rees & Bart Nolet
Range shifts and phenological change are two processes by which organisms respond to environmental warming. Understanding the mechanisms that drive these changes is key for optimal conservation and management. Here we study both processes in the migratory Bewick’s swan (Cygnus columbianus bewickii) using different methods, analysing nearly 50 years of resighting data (1970-2017). In this period the wintering area of the Bewick’s swans shifted eastwards (“short-stopping”) at a rate of >12.5 km y-1, thereby shortening...

Species identity and diversity effects on invasion resistance of tropical freshwater plant communities

Antonella Petruzzella, Tauany A. Da S. S. R. Rodrigues, Casper H. A. Van Leeuwen, Francisco De Assis Esteves, Marcos Paulo Figueiredo-Barros & Elisabeth S. Bakker
Biotic resistance mediated by native plant diversity has long been hypothesized to reduce the success of invading plant species in terrestrial systems in temperate regions. However, still little is known about the mechanisms driving invasion patterns in other biomes or latitudes. We help to fill this gap by investigating how native plant community presence and diversity, and the presence of native phylogenetically closely related species to an invader, would affect invader Hydrilla verticillata establishment success...

Data from: Connecting the data landscape of long-term ecological studies: the SPI-Birds data hub

Antica Culina, Zuzana Zajkova, Stefan Vriend, Chloé Nater & Liam Bailey
1. The integration and synthesis of the data in different areas of science is drastically slowed and hindered by a lack of standards and networking programmes. Long-term studies of individually marked animals are not an exception. These studies are especially important as instrumental for understanding evolutionary and ecological processes in the wild. Further, their number and global distribution provides a unique opportunity to assess the generality of patterns and to address broad-scale global issues (e.g....

Exogenous application of plant hormones in the field alters aboveground plant–insect responses and belowground nutrient availability, but does not lead to differences in plant–soil feedbacks

Robin Heinen, Katja Steinauer, Jonathan De Long, Renske Jongen, Arjen Biere, Jeffrey Harvey & Martijn Bezemer
Plant–soil feedbacks of plants that are exposed to herbivory have been shown to differ from those of plants that are not exposed to herbivores. Likely, this process is mediated by jasmonic acid (JA) and salicylic acid (SA) defense pathways, which are induced by aboveground herbivory. Furthermore, exogenous application of these phytohormones to plants alters belowground communities, but whether this changes plant–soil feedbacks in natural systems is unknown. We applied exogenous sprays of JA and SA...

Data from: Plant community composition steers grassland vegetation via soil legacy effects

Robin Heinen, Emilia Hannula, Jonathan De Long, Martine Huberty, Renske Jongen, Anna Kielak, Katja Steinauer, Feng Zhu & Martijn Bezemer
Soil legacy effects are commonly highlighted as drivers of plant community dynamics and species co-existence. However, experimental evidence for soil legacy effects of conditioning plant communities on responding plant communities under natural conditions is lacking. We conditioned 192 grassland plots using six different plant communities with different ratios of grasses and forbs and for different durations. Soil microbial legacies were evident for soil fungi, but not for soil bacteria, while soil abiotic parameters did not...

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...

Data from: A critical assessment of the stoichiometric knife-edge: no evidence for artefacts caused by the experimental P-supplementation of algae

Steven Declerck & Libin Zhou
The stoichiometric knife-edge refers to the reduced performance of consumers encountering food with excess phosphorus (P) relative to carbon (C) or nitrogen (N). Studies that provide evidence for such knife-edge in aquatic systems often apply phosphate supplementation to create P-rich food treatments. However, this method may suffer from artefacts, because after uptake algae may store P in a form different from the P-rich biomolecules typically consumed by zooplankton. Our aim was to test if P...

Impact of cellulose-rich organic soil amendments on growth dynamics and pathogenicity of Rhizoctonia solani

Anna Clocchiatti, Emilia Hannula, Muhammad Syamsu Rizaludin, Maria Hundscheid, Paulien Klein Gunnewiek, Mirjam Schilder, Joeke Postma & Wietse De Boer
Cellulose-rich amendments stimulate saprotrophic fungi in arable soils. This may increase competitive and antagonistic interactions with root-infecting pathogenic fungi, resulting in lower disease incidence. However, cellulose-rich amendments may also stimulate pathogenic fungi with saprotrophic abilities, thereby increasing plant disease severity. The current study explores these scenarios, with a focus on the pathogenic fungus Rhizoctonia solani. Saprotrophic growth of R. solani on cellulose-rich materials was tested in vitro. This confirmed paper pulp as a highly suitable...

Steering the soil microbiome by repeated litter addition

Ciska Veen, Freddy Ten Hooven, Carolin Weser & Emilia Hannula
1. Microbial communities drive plant litter breakdown. Litters originating from different plant species are often associated with specialized microbiomes that accelerate the breakdown of that litter, known as home-field advantage. Yet, how and how fast microbial communities specialize towards litter inputs is not known. 2. Here we study effects of repeated litter additions on soil microbial community structure and functioning. We set up a nine-month, full-factorial, reciprocal litter transplant experiment with soils and litters from...

Stimulated saprotrophic fungi in arable soil extend their activities to the rhizosphere and root microbiomes of crop seedlings

Anna Clocchiatti, Emilia Hannula, Maria Hundscheid, Paulien Klen Gunnewiek & Wietse De Boer
Saprotrophic fungi play an important role in ecosystem functioning and plant performance, but their abundance in intensively managed arable soils is low. Saprotrophic fungal biomass in arable soils can be enhanced with amendments of cellulose-rich materials. Here we examined if sawdust-stimulated saprotrophic fungi extend their activity to the rhizosphere of crop seedlings and influence the composition and activity of other rhizosphere and root inhabitants. After growing carrot seedlings in sawdust-amended arable soil, we determined fungal...

Data from: Severance of arbuscular mycorrhizal networks in restoration grasslands enhances seedling biomass

Dassen Sigrid, Wim Van Der Putten & Gerlinde De Deyn
1. Establishment and growth of grassland plant species is generally promoted by arbuscular mycorrhizal fungi (AMF) when grown in isolation. However, in grassland communities AMF form networks that may connect individual plants of different ages within and between species. Here, we use an in-growth core approach to examine how mycorrhizal networks influences performance of seedlings in grasslands. 2. We selected 4 grass and 4 forb species with known negative or neutral-positive plant-soil feedback and grew...

Plant traits shape soil legacy effects on individual plant-insect interactions

Robin Heinen, Arjen Biere & Martijn Bezemer
Plant-mediated soil legacy effects can be important determinants of the performance of plants and their aboveground insect herbivores, but so far, soil legacy effects on plant-insect interactions have been tested for only a limited number of host plant species and soils. Here, we tested the performance of a polyphagous aboveground herbivore, caterpillars of the cabbage moth, Mamestra brassicae on twelve host plant species that were grown on a set of soils conditioned by each of...

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: Recent and dynamic transposable elements contribute to genomic divergence under asexuality

Julie Ferreira De Carvalho, Victor De Jager, Thomas P. Van Gurp, Niels C.A.M. Wagemaker & Koen J.F. Verhoeven
Background: Transposable elements (TEs) are mobile pieces of genetic information with high mutagenic potential for the host genome. Transposition is often neutral or deleterious but may also generate potentially adaptive genetic variation. This additional source of variation could be especially relevant in non-recombining species reproducing asexually. However, evidence is lacking to determine the relevance of TEs in plant asexual genome evolution and their associated effects. Here, we characterize the repetitive fraction of the genome of...

Data from: Plant quantity affects development and survival of a gregarious insect herbivore and its endoparasitoid wasp

Minghui Fei, Rieta Gols, Feng Zhu & Jeffrey A. Harvey
Virtually all studies of plant-herbivore-natural enemy interactions focus on plant quality as the major constraint on development and survival. However, for many gregarious feeding insect herbivores that feed on small or ephemeral plants, the quantity of resources is much more limiting, yet this area has received virtually no attention. Here, in both lab and semi-field experiments using tents containing variably sized clusters of food plants, we studied the effects of periodic food deprivation in a...

Data from: A plant pathogen modulates the effects of secondary metabolites on the performance and immune function of an insect herbivore

Elena Rosa, Luisa Woestmann, Arjen Biere & Marjo Saastamoinen
Host plant chemical composition critically shapes the performance of insect herbivores feeding on them. Some insects have become specialized on plant secondary metabolites, and even use them to their own advantage such as defense against predators. However, infection by plant pathogens can seriously alter the interaction between herbivores and their host plants. We tested whether the effects of the plant secondary metabolites, iridoid glycosides (IGs), on the performance and immune response of an insect herbivore...

Data from: Population growth in a wild bird is buffered against phenological mismatch

Thomas E. Reed, Vidar Grotan, Stephanie Jenouvrier, Bernt-Erik Saether & Marcel E. Visser
Broad-scale environmental changes are altering patterns of natural selection in the wild, but few empirical studies have quantified the demographic cost of sustained directional selection in response to these changes. We tested whether population growth in a wild bird is negatively affected by climate change–induced phenological mismatch, using almost four decades of individual-level life-history data from a great tit population. In this population, warmer springs have generated a mismatch between the annual breeding time and...

Data from: Costs and benefits of admixture between foreign genotypes and local populations in the field

Jun Shi, Jasmin Joshi, Katja Tielborger, Koen J. F. Verhoeven & Mirka Macel
Admixture is the hybridization between populations within one species. It can increase plant fitness and population viability by alleviating inbreeding depression and increasing genetic diversity. However, populations are often adapted to their local environments and admixture with distant populations could break down local adaptation by diluting the locally adapted genomes. Thus, admixed genotypes might be selected against and be outcompeted by locally adapted genotypes in the local environments. To investigate the costs and benefits of...

Data from: Methods in field chronobiology

Davide Michelangelo Dominoni, Susanne Åkesson, Raymond Klaassen, Kamiel Spoelstra & Martin Bulla
Chronobiological research has seen a continuous development of novel approaches and techniques to measure rhythmicity at different levels of biological organization from locomotor activity (e.g. migratory restlessness) to physiology (e.g. temperature and hormone rhythms, and relatively recently also in genes, proteins and metabolites). However, the methodological advancements in this field have been mostly and sometimes exclusively used only in indoor laboratory settings. In parallel, there has been an unprecedented and rapid improvement in our ability...

Data from: Modeling winter moth Operophtera brumata egg phenology: nonlinear effects of temperature and developmental stage on developmental rate

Lucia Salis, Marjolein Lof, Margriet Van Asch & Marcel E. Visser
Understanding the relationship between an insect's developmental rate and temperature is crucial to forecast insect phenology under climate change. In the winter moth Operophtera brumata timing of egg-hatching has severe fitness consequences on growth and reproduction as egg-hatching has to match bud burst of the host tree. In the winter moth, as in many insect species, egg development is strongly affected by ambient temperatures. Here we use laboratory experiments to show for the first time...

Data from: Root-lesion nematodes suppress cabbage aphid population development by reducing aphid daily reproduction

Wilhelmina H. G. Hol, Ciska E. Raaijmakers, Ilse Mons, Katrin M. Meyer & Nicole M. Van Dam
Empirical studies have shown that belowground feeding herbivores can affect the performance of aboveground herbivores in different ways. Often the critical life-history parameters underlying the observed performance effects remain unexplored. In order to better understand the cause for the observed effects on aboveground herbivores, these ecological mechanisms must be better understood. In this study we combined empirical experiments with a modelling approach to analyse the effect of two root feeding endoparasitic nematodes with different feeding...

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