Seagrasses evolved from terrestrial plants into marine foundation species around 100 million years ago. Their ecological success, however, remains a mystery because natural organic matter accumulation within the beds should result in toxic sediment sulfide levels. Using a meta-analysis, a field study, and a laboratory experiment, we reveal how an ancient three-stage symbiosis between seagrass, lucinid bivalves, and their sulfide-oxidizing gill bacteria reduces sulfide stress for seagrasses. We found that the bivalve–sulfide-oxidizer symbiosis reduced sulfide...
Data from: Independence among physiological traits suggests flexibility in the face of ecological demands on phenotypesDeborah M. Buehler, Francois Vézina, Wolfgang Goymann, Ingrid Schwabl, Maaike Versteegh, B. Irene Tieleman & Theunis Piersma
Phenotypic flexibility allows animals to adjust their physiology to diverse environmental conditions encountered over the year. Examining how these varying traits covary gives insights into potential constraints or freedoms that may shape evolutionary trajectories. In this study we examined relationships among hematocrit, baseline corticosterone concentration, constitutive immune function and basal metabolic rate in red knot Calidris canutus islandica individuals subjected to experimentally manipulated temperature treatments over an entire annual cycle. If covariation among traits is...
Clonal organisms with occasional sex are important for our general understanding of the costs and benefits that maintain sexual reproduction. Cyclically parthenogenetic aphids are highly variable in their frequency of sexual reproduction and studies have mostly focused on free-living aphids above ground, whereas dispersal constraints and dependence on ant-tending may differentially affect the costs and benefits of sex in subterranean aphids. Here, we studied reproductive mode and dispersal in a community of root aphids that...
Data from: De novo characterization of the Timema cristinae transcriptome facilitates marker discovery and inference of genetic divergence.Aaron A. Comeault, Mathew Sommers, Tanja Schwander, C. Alex Buerkle, Timothy E. Farkas, Patrik Nosil & Thomas L. Parchman
Adaptation to different ecological environments can promote speciation. Although numerous examples of such ‘ecological speciation’ exist, the genomic basis of the process, and the role of gene flow in it, remains less understood. This is, at least in part, because systems that are well characterized in terms of their ecology often lack genomic resources. In this study we characterize the transcriptome of Timema cristinae stick insects, a system that has been researched intensively in terms...
Explaining variation in life expectancy between individuals of the same age is fundamental to our understanding of population ecology and life-history evolution. Variation in the length and rate of loss of the protective telomere chromosome caps has been linked to cellular lifespan. Yet, the extent to which telomere length and dynamics predict organismal lifespan in nature is still contentious. Using longitudinal samples taken from a closed population of Acrocephalus sechellensis (Seychelles warblers) studied for over...
Data from: Evolution of defense against depletion of local food resources in a mechanistic foraging modelMartin Hinsch, Ido Pen & Jan Komdeur
Abstract Models of resource defense are usually based on the assumption that individuals fight over the possession of discrete food items. In many territorial species however conflicts occur over access to an area in space that contains resources rather than the resources themselves. We investigate under which conditions defense against depletion of local resources instead of single resource items can evolve from a non-aggressive ancestral population using a spatially explicit mechanistic model with resource dynamics...
Data from: Do immunological, endocrine and metabolic traits fall on a single Pace-of-Life axis? Covariation and constraints among physiological systemsMaaike A. Versteegh, I. Schwabl, Sophie Jacqier, B. Irene Tieleman & S. Jaquier
Variation in demographic and physiological attributes of life-history is thought to fall on one single axis, a phenomenon termed the Pace-of-Life. A slow Pace-of-Life is characterized by low annual reproduction, long life span and low metabolic rate, a fast Pace-of-Life by the opposite characteristics. The existence of a single axis has been attributed to constraints among physiological mechanisms that are thought to restrict evolutionary potential. In that case, physiological traits should covary in the same...
Data from: Sex determination meltdown upon biological control introduction of the parasitoid Cotesia rubecula?Jetske G. De Boer, Bram Kuijper, George E. Heimpel & Leo W. Beukeboom
Natural enemies may go through genetic bottlenecks during the process of biological control introductions. Such bottlenecks are expected to be particularly detrimental in parasitoid Hymenoptera that exhibit complementary sex determination (CSD). CSD is associated with a severe form of inbreeding depression because homozygosity at one or multiple sex loci leads to the production of diploid males that are typically unviable or sterile. We observed that diploid males occur at a relatively high rate (8-13% of...
Data from: Within-clutch variation in yolk testosterone as an adaptive maternal effect to modulate avian sibling competition: evidence from a comparative studyMartina S. Muller, Ton G. G. Groothuis & Martina Muller
In many species, embryos are exposed to maternal hormones in utero, in the egg, or in the seed. In birds, mothers deposit substantial testosterone into their eggs, which enhances competitive ability of offspring. These maternal testosterone concentrations vary systematically within clutches in different patterns and may enable mothers to adaptively fine-tune competitive hierarchies within broods. We performed a comparative analysis to investigate this hypothesis using a broad set of avian species. We expected species with...
Data from: Telomere length reflects phenotypic quality and costs of reproduction in a long-lived seabirdChristina Bauch, Peter H. Becker & Simon Verhulst
Telomere length is associated with cellular senescence, lifestyle and ageing. Short telomeres indicate poor health in humans and reduced life expectancy in several bird species, but little is known about telomeres in relation to phenotypic quality in wild animals. We investigated telomere lengths in erythrocytes of known-age common terns (Sterna hirundo), a migratory seabird, in relation to arrival date and reproductive performance. Cross-sectional data revealed that, independent of age, individuals with short telomeres performed better:...
University of Groningen10
Max Planck Institute for Ornithology2
University of Wyoming1
Radboud University Nijmegen1
University of Minnesota1
Royal Netherlands Institute for Sea Research1
Center for Northern Studies1
University of East Anglia1
University of Florida1
Institute of Avian Research1