12 Works

Data from: High spatiotemporal variability of methane concentrations challenges estimates of emissions across vegetated coastal ecosystems

Florian Roth, Xiaol Sun, Marc Geibel, John Prytcherch, Volker Brüchert, Stefano Bonaglia, Elias Broman, Francisco Nascimento, Christoph Humborg & Alf Norkko
Coastal methane (CH4) emissions dominate the global ocean CH4 budget and can offset the “blue carbon” storage capacity of vegetated coastal ecosystems. However, current estimates lack systematic, high-resolution, and long-term data from these intrinsically heterogeneous environments, making coastal budgets sensitive to statistical assumptions and uncertainties. Using continuous CH4 concentrations, δ13C-CH4 values, and CH4 sea-air fluxes across four seasons in three globally pervasive coastal habitats, we show that the CH4 distribution is spatially patchy over meter-scales...

UGU-data till projektet: Elevers motivation, välbefinnande och prestationer från mellanstadiet till gymnasiet

Combining population genomics with demographic analyses highlights habitat patchiness and larval dispersal as determinants of connectivity in coastal fish species

Halvor Knutsen, Diana Catarino, Lauren Rogers, Marte Sodeland, Morten Mattingsdal, Marlene Jahnke, Jeffrey Hutchings, Ida Mellerud, Sigurd Espeland, Kerstin Johanneson, Olivia Roth, Michael Hansen, Sissel Jentoft, Carl Andre & Per Erik Jorde
Gene flow shapes spatial genetic structure as well as the potential for local adaptation of populations. Among marine animals with non-migratory adults, the presence or absence of a pelagic larval stage is thought to be a key determinant in shaping gene flow and the genetic structure of populations. In addition, the spatial distribution of suitable habitats will influence the distribution of biological populations and their pattern of gene flow. We used whole genome sequencing to...

The role of spatial structure in multi-deme models of evolutionary rescue

Matteo Tomasini & Stephan Peischl
Genetic variation and population sizes are critical factors for successful adaptation to novel environmental conditions. Gene flow between sub-populations is a potent mechanism to provide such variation and can hence facilitate adaptation, for instance by increasing genetic variation or via the introduction of beneficial variants. On the other hand, if gene flow between different habitats is too strong, locally beneficial alleles may not be able to establish permanently. In the context of evolutionary rescue, intermediate...

Expectation-Driven Term Structure of Equity and Bond Yields

Ming Zeng & Guihai Zhao
Recent findings on the term structure of equity and bond yields pose serious challenges to existing models of equilibrium asset pricing. This paper presents a new equilibrium model of subjective expectations to explain the joint historical dynamics of equity and bond yields (and their yield spreads). The movements of equity and bond yields are driven mainly by subjective expectations of dividend and gross domestic product (GDP) growth. Yields on short-term dividend claims are more volatile...

The biogeography of community assembly: latitude and predation drive variation in community trait distribution in a guild of epifaunal crustaceans

Collin Gross, Collin Gross, J Duffy, Kevin Hovel, Melissa Kardish, Pamela Reynolds, Christoffer Boström, Katharyn Boyer, Mathiew Cusson, Johan Eklöf, Aschwin Engelen, Klemens Eriksson, Joel Fodrie, John Griffin, Clara Hereu, Masakazu Hori, A Randall Hughes, Mikhail Ivanov, Pablo Jorgensen, Claudia Kruschel, Kun-Seop Lee, Jonathan Lefcheck, Karen McGlathery, Per-Olav Moksnes, Masahiro Nakaoka … & Jay Stachowicz
While considerable evidence exists of biogeographic patterns in the intensity of species interactions, the influence of these patterns on variation in community structure is less clear. Using a model selection approach on measures of trait dispersion in crustaceans associated with eelgrass (Zostera marina) spanning 30º of latitude in two oceans, we found that dispersion strongly increased with increasing predation and decreasing latitude. Ocean and epiphyte load appeared as secondary predictors; Pacific communities were more overdispersed...

Data from: Sperm longevity and salinity – the overlooked importance of spawning environment for alternative reproductive tactics

Ola Svensson, Charlotta Kvarnemo & Leon Green
Studies on adaptive responses to sperm competition have focused on mating modes and mating roles. The main mating modes studied are external and internal fertilization and spermcasting. The focus of male mating roles assumes one advantageous ‘bourgeois’ role and another disadvantageous ‘parasitic’ role regarding the probability of fertilization. However, sperm longevity between teleost fishes spawning in hypoosmotic freshwater and species spawning in hyperosmotic saltwater differs markedly. We argue that this can have major impacts on...

Linking Laser-Ablation ICP-MS analysis and sulfide textures in identifying gold remobilization and enrichment processes in modern seafloor massive sulfides, Kolumbo arc volcano, Greece

Stephanos P. Kilias , Evangelia Zygouri , Nikolaos Zegkinoglou , Manuel Keith , Thomas Zack , Daniel J. Smith , Paraskevi Nomikou & Paraskevi Polymenakou
Target settings to secure sustainable access to raw materials include seafloor massive sulphide (SMS) resources. Gold-rich SMS deposits, are often the result of complex interplay of multiple Au enrichment events. Recent studies have shown that high-grade Au ores result from Au remobilization from preexisting mineralization, driven by fluid-induced coupled dissolution-reprecipitation (CDR) reactions; however investigations into this process in modern Au-rich SMS, are lacking. To tackle this issue, Au-rich [AuBULK≤32ppm; Au/(Cu+Zn+Pb)=1.9], polymetallic (Sb, Tl, Hg, Ag,...

Simulation code for: The role of phenotypic plasticity in the establishment of range margins

Martin Eriksson & Marina Rafajlovic
It has been argued that adaptive phenotypic plasticity may facilitate range expansions over spatially and temporally variable environments. However, plasticity may induce fitness costs. This may hinder the evolution of plasticity. Earlier modelling studies examined the role of plasticity during range expansions of populations with fixed genetic variance. However, genetic variance evolves in natural populations. This may critically alter model outcomes. We ask: How does the capacity for plasticity in populations with evolving genetic variance...

UGU data till projektet: Växelvis boende i Sverige

Data from: High methane emissions from an anoxic fjord driven by mixing and oxygenation

Stefano Bonaglia, Tobias Rütting, Kononets Mikhail, Anders Stigebrandt, Isaac R. Santos & Per O. J. Hall
Tracking sources, sinks and long-term trends of methane emissions is imperative under climate change. Marine methane fluxes remain elusive and uncertain even though the ocean plays a major role in global budgets. High-latitude fjord ecosystems are widespread, store large amounts of sediment carbon, and undergo cycles of water column mixing, making them potential but still overlooked sources of methane to the atmosphere. Here, state-of-the-art benthic lander robots and multi annual observations revealed that anoxic fjords...

Natal dispersal does not entail survival costs but is linked to breeding dispersal in a migratory shorebird, the southern dunlin Calidris alpina schinzii

Veli-Matti Pakanen, Veli-Matti Pakanen, Kari Koivula, Blandine Doligez, Lars-Åke Flodin, Angela Pauliny, Nelli Rönkä & Donald Blomqvist
The costs and benefits of dispersal are often assessed by comparing fitness between dispersing and non-dispersing individuals. Importantly, individuals that disperse between their natal and first breeding site may subsequently be more likely to disperse between breeding sites compared to those that remained philopatric to their natal site. Such within-individual consistency in dispersal behaviour can bias local survival estimation, and thus the survival comparison between dispersing and non-dispersing individuals, if breeding dispersal leads to permanent...

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