Data from: Rapid shifts in the thermal sensitivity of growth but not development rate causes temperature-size response variability during ontogeny in arthropodsCurtis R. Horne, Andrew G. Hirst, David Atkinson, Rodrigo Almeda & Thomas Kiørboe
Size at maturity in ectotherms commonly declines with warming. This near-universal phenomenon, formalised as the temperature-size rule, has been observed in over 80% of tested species, from bacteria to fish. The proximate cause has been attributed to the greater temperature dependence of development rate than growth rate, causing individuals to develop earlier but mature smaller in the warm. However, few studies have examined the ontogenetic progression of the temperature-size response at high resolution. Using marine...
Data from: Trophic interactions drive the emergence of diel vertical migration patterns: a game-theoretic model of copepod communitiesJérôme Pinti, Thomas Kiørboe, Uffe H. Thygesen & Andre W. Visser
Diel Vertical Migration (DVM), the daily movement of organisms through oceanic water columns, is mainly driven by spatio-temporal variations in light affecting the intensity of predator-prey interactions. Migration patterns of an organism are intrinsically linked to the distribution of its conspecifics, its prey, and its predators, each with their own fitness seeking imperatives. We present a mechanistic, trait-based model of DVM for the different components of a pelagic community. Specifically we consider size, sensory mode,...
Collapses and regime changes are pervasive in complex systems (such as marine ecosystems) governed by multiple stressors. The demise of Atlantic cod (Gadus morhua) stocks constitutes a text book example of the consequences of overexploiting marine living resources, yet the drivers of these nearly synchronous collapses are still debated. Moreover, it is still unclear why rebuilding of collapsed fish stocks such as cod is often slow or absent. Here we apply the stochastic cusp model,...
The aim of this report is to provide insights into the uncertainty faced by manufacturers when developing Product-Service Systems (PSS), and how to navigate this uncertainty better through agile management practices. PSS are compound offerings comprising of an artefact (the tangible or intangible product), and supporting engineering services. To provide these insights, this report describes the results of a study undertaken in the American aerospace and defence industry. An in-depth case study of a large-scale...
A fundamental challenge in ecology is to understand why species are found where they are and predict where they are likely to occur in the future. Trait-based approaches may provide such understanding, because it is the traits and adaptations of species that determine which environments they can inhabit. It is therefore important to identify key traits that determine species distributions and investigate how these traits relate to the environment. Based on scientific bottom-trawl surveys of...
Speciation history of European (Anguilla anguilla) and American eel (A. rostrata), analyzed using genomic dataNatacha Nikolic, Shenglin Liu, Magnus W. Jacobsen, Bjarni Jónsson, Louis Bernatchez, Pierre-Alexandre Gagnaire & Michael M. Hansen
Speciation in the ocean could differ from terrestrial environments due to fewer barriers to gene flow. Hence, sympatric speciation might be common, with American and European eel being candidates for exemplifying this. They show disjunct continental distributions on both sides of the Atlantic, but spawn in overlapping regions of the Sargasso Sea from where juveniles are advected to North American, European and North African coasts. Hybridization and introgression is known to occur, with hybrids almost...
Male peacock spiders (Maratus, Salticidae) compete to attract female mates using elaborate, sexually-selected displays. They evolved both brilliant color and velvety black. Here we use scanning electron microscopy (SEM), hyperspectral imaging, and finite-difference time-domain (FDTD) optical modeling to investigate the deep black surfaces of peacock spiders. We found that super black regions reflect <0.5% of light (for a 30° collection angle) in Maratus speciosus (0.44%) and Maratus karrie (0.35%) due to microscale structures. Both species...
Body size, light intensity and nutrient supply determine plankton stoichiometry in mixotrophic plankton food websPei-Chi Ho, Chun-Wei Chang, Fuh-Kwo Shiah, Pei-Ling Wang, Chih-Hao Hsieh & Ken H. Andersen
Trophic strategy determines stoichiometry of plankton. In general, heterotrophic zooplankton have lower and more stable C:N and C:P ratios than photoautotrophic phytoplankton whereas mixotrophic protists, which consume prey and photosynthesize, have stoichiometry between zooplankton and phytoplankton. As trophic strategies change with cell size, body size may be a key trait influencing eukaryotic plankton stoichiometry. However, the relationship between body size and stoichiometry remains unclear. Here, we measured plankton size-fractionated C:N ratios under different intensities of...
Data from: Temperature-dependence of minimum resource requirements alters competitive hierarchies in phytoplanktonLeah Lewington-Pearce, Anita Narwani, Mridul K. Thomas, Colin Kremer, Helena Vogler & Pavel Kratina
1. Resource competition theory is a conceptual framework that provides mechanistic insights into competition and community assembly of species with different resource requirements. However, there has been little exploration of how resource requirements depend on other environmental factors, including temperature. Changes in resource requirements as influenced by environmental temperature would imply that climate warming can alter the outcomes of competition and community assembly. 2. We experimentally demonstrate that environmental temperature alters the minimum light and...
Data from: Genomic analyses suggest adaptive differentiation of Northern European native cattle breedsAstrid V. Stronen, Cino Pertoldi, Laura Iacolina, Haja N. Kadarmideen & Torsten N. Kristensen
Native domestic breeds represent important cultural heritage and genetic diversity relevant for production traits, environmental adaptation and food security. However, risks associated with low effective population size, such as inbreeding and genetic drift, have elevated concerns over whether unique within-breed lineages should be kept separate or managed as one population. As a conservation genomic case study of the genetic diversity represented by native breeds, we examined native and commercial cattle (Bos taurus) breeds including the...
Technical University of Denmark13
University of Hamburg2
Spanish Institute of Oceanography1
Swiss Federal Institute of Aquatic Science and Technology1
The Arctic University of Norway1
Geological Survey of Denmark and Greenland1
University of Oslo1