A5049621737- Marine and coastal plant biology
- Genetic diversity and population structure
- Marine Biology and Ecology Research
- Marine Bivalve and Aquaculture Studies
- Marine and fisheries research
- Coastal wetland ecosystem dynamics
- Fish Ecology and Management Studies
- Microbial Community Ecology and Physiology
- Identification and Quantification in Food
- Isotope Analysis in Ecology
- Genomics and Phylogenetic Studies
- Marine Ecology and Invasive Species
- Marine and coastal ecosystems
- Plant and animal studies
- Cephalopods and Marine Biology
- Methane Hydrates and Related Phenomena
- Aquatic Invertebrate Ecology and Behavior
- Comparative International Legal Studies
- Ecology and Vegetation Dynamics Studies
- Coral and Marine Ecosystems Studies
- Echinoderm biology and ecology
- Aquatic Ecosystems and Biodiversity
- Renal and Vascular Pathologies
- Law, Ethics, and AI Impact
- Nosocomial Infections in ICU
University of Gothenburg
2015-2025
Linnaeus University
2022
Cenim - Centro Nacional de Investigaciones Metalurgicas
2018
Swinburne University of Technology
2013
University of East Anglia
2004-2009
Marine Biological Laboratory
2007
Center for Scientific Research and Higher Education at Ensenada
2004
Theory predicts that speciation can be quite rapid. Previous examples comprise a wide range of organisms such as sockeye salmon, polyploid hybrid plants, fruit flies and cichlid fishes. However, few studies have shown natural rapid evolution giving rise to new species in marine environments. Using microsatellite markers, we show the brown macroalga (Fucus radicans) Baltic Sea last 400 years, well after formation this brackish water body ~8–10 thousand years ago. Sympatric individuals F....
Information on spatial and temporal patterns of genetic diversity is a prerequisite to understanding the demography populations, fundamental successful management conservation species. In sea, it has been observed that oceanographic other physical forces can constitute barriers gene flow may result in similar population structures different Such similarities among species would greatly simplify biodiversity. Here, we tested for shared complex marine area, Baltic Sea. We assessed...
ABSTRACT During periods of environmental change, genetic diversity in foundation species is critical for ecosystem function and resilience, but it remains overlooked monitoring. In the Baltic Sea, a key monitoring brown seaweed Fucus vesiculosus , which forms sublittoral 3D habitats providing shelter food fish invertebrates. Ecological distribution models predict significant loss F. due to ocean warming, unless populations can adapt. Genetic variation recombination during sexual reproduction...
Abstract Recent substantial declines in northeastern Atlantic cod stocks necessitate improved biological knowledge and the development of techniques to complement standard stock assessment methods (which largely depend on accurate commercial catch data). In 2003, an ichthyoplankton survey was undertaken Irish Sea subsamples ‘cod‐like’ eggs were analysed using a TaqMan multiplex, PCR (polymerase chain reaction) assay (with specific probes for cod, haddock whiting). The method readily applied...
Parallel evolution has been invoked as a forceful mechanism of ecotype and species formation in many animal taxa. However, parallelism may be difficult to separate from recently monophyletically diverged that are likely show complex genetic relationships result considerable shared ancestral variation secondary hybridization local areas. Thus, species' degrees reproductive isolation, barriers dispersal and, particular, limited capacities for long-distance will affect demographical structures...
Asexual reproduction by cloning may affect the genetic structure of populations, their potential to evolve, and, among foundation species, contributions ecosystem functions. Macroalgae genus Fucus are known produce attached plants only sexual recruitment. Recently, however, clones recruited asexual were observed in a few populations radicans Bergström et L. Kautsky and F. vesiculosus inside Baltic Sea. Herein we assess distribution prevalence clonality fucoids using nine polymorphic...
Closely related taxa provide significant case studies for understanding evolution of new species but may simultaneously challenge identification and definition. In the Baltic Sea, two dominant perennial brown algae share a very recent ancestry. Fucus vesiculosus invaded this recently formed postglacial sea 8000 years ago shortly thereafter radicans diverged from lineage as an endemic species. Sea both reproduce sexually also recruit fully fertile individuals by asexual fragmentation. Earlier...
Abstract In dioecious species with both sexual and asexual reproduction, the spatial distribution of individual clones affects potential for reproduction local adaptation. The seaweed Fucus radicans , endemic to Baltic Sea, has separate sexes, but new attached thalli may also form asexually. We mapped (multilocus genotypes, MLGs) over macrogeographic (>500 km) microgeographic (<100 m) scales in Sea assess relationship between clonal structure, recruitment, natural selection. Sexual...
Why species that in their core areas mainly reproduce sexually become enriched with clones marginal populations ("geographic parthenogenesis") remains unclear. Earlier hypotheses have emphasized selection might promote clonality because it protects locally adapted genotypes. On the other hand, also hampers recombination and adaptation to changing conditions. The aim of present study was investigate early stages range expansion a partially clonal what drives an increase cloning during such...
In species reproducing both sexually and asexually clones are often more common in recently established populations. Earlier studies have suggested that this pattern arises from natural selection favouring asexual recruitment young Alternatively, as we show here, may result stochastic processes during species-range expansions. We model a dioecious expanding into new area which all individuals capable of sexual reproduction, equal survival rates dispersal distances. Even under conditions...
Abstract Incorporating species' eco‐evolutionary responses to human‐caused disturbances remains a challenge in marine management efforts. A prerequisite is knowledge of geographic structure and scale genetic diversity connectivity—the so‐called seascape patterns. The Baltic Sea an excellent model system for studies linking genetics with effects anthropogenic stress. However, patterns this area are only described few species completely unknown invertebrate herbivores, which constitute...
Our study explores genomic signs of adaptation in A. lixula to different water pH conditions. To achieve this, we analysed the genomics variation individuals living across a natural gradient Canary Islands, Spain. We use 2b-RADseq protocol with 74 samples from sites varying levels (from 7.3 7.9 during low tide) and included control site. identified 14,883 SNPs, 432 as candidate SNPs under selection variations through redundancy analysis. While all indicated homogeneity, displayed differences...
Abstract Population structuring in the northern shrimp (Pandalus borealis) North Sea area (including Fladen and Skagerrak) was studied by microsatellite DNA analyses. Screening 20 sample locations open ocean Skagerrak fjords for nine loci revealed low, but significant genetic heterogeneity. The spatial structure among oceanic samples of eastern weak non-significant, consistent with current management regime one single stock. However, fjord generally displayed elevated levels differentiation,...
Climate change related effects threaten species worldwide; within populations may react differently to climate-induced stress due local adaptation and partial isolation, particularly in areas with steep environmental gradients. Populations of the marine foundation seaweed Fucus vesiculosus are established over a salinity gradient at entrance brackish water Baltic Sea (NE Atlantic). First, we analyzed genetic differentiation among using thousands markers. Second, measured physiological...
Abstract Several studies have demonstrated strong population structuring over small distances in the rocky‐shore mbuna cichlid fishes from Lake Malawi, suggesting potential for allopatric speciation. However, many endemic Malawi cichlids are neither mbuna, nor confined to rocky shores. Using microsatellites, we investigated structure three species of non‐mbuna genus Protomelas . The P. taeniolatus showed high levels even less than 1 km, while sandy‐shore similis no significant up 21 km....
Interactions between plants and their biotic environment can drastically change during range‐expansion result in rapid adaptive evolution of plant traits. According to the influential increased competitive ability (EICA) hypothesis escape from specialist natural enemies will lead a reduction defense levels, but way which generalist consumers new ranges affect defenses remains poorly understood. We conducted four month controlled experiment examine if high densities herbivore Idotea baltica...
Establishing populations in ecologically marginal habitats may require substantial phenotypic changes that come about through plasticity, local adaptation, or both. West-Eberhard's "plasticity-first" model suggests plasticity allows for rapid colonisation of a new environment, followed by directional selection develops adaptation. Two predictions from this are (i) individuals the original population have high enough to survive and reproduce (ii) show evidence Individuals macroalga Fucus...
In order to provide further evidence of damage mechanisms predicted by the recent solid-state transformation creep (SSTC) model, direct observation accumulation during Al–3.85Mg was made using synchrotron X-ray refraction. refraction techniques detect internal specific surface ( i.e. per unit volume) on a length scale comparable specimen size, but with microscopic sensitivity. A significant rise in increasing time observed, providing for creation fine grain substructure, as SSTC model. This...
Abstract Background Rockweeds are among the most important foundation species of temperate rocky littoral shores. In Baltic Sea, rockweed Fucus vesiculosus is distributed along a decreasing salinity gradient from North Atlantic entrance to low-salinity regions in north-eastern margins, thus, demonstrating remarkable tolerance hyposalinity. The underlying mechanisms for this still poorly understood. Here, we exposed F. two range-margin populations hyposaline (2.5 PSU - practical unit)...
Sandy beaches are biogeochemical hotspots that bridge marine and terrestrial ecosystems via the transfer of organic matter, such as seaweed (termed wrack). A keystone this unique ecosystem is microbial community, which helps to degrade wrack re-mineralize nutrients. However, little known about community. Here, we characterize wrackbed microbiome well a primary consumer, fly Coelopa frigida, examine how they change along one most studied ecological gradients in world, transition from North...
Zostera marina (eelgrass) is a foundation species in coastal zones the northern hemisphere. Eelgrass declining across its distribution, trend likely to accelerate under climate change. In Sweden, eelgrass of particular concern management and conservation. Here, we provide information on genetic variation, an important component for potential persistence adaptation any changing environment. particular, steep salinity gradient over which distributed along Swedish coast (26 psu west 5 east...
Most species of brown macroalgae recruit exclusively sexually. However, Fucus radicans, a dominant in the northern Baltic Sea, recruits new attached thalli both sexually and asexually. The level asexual recruitment varies among populations from complete sexual to almost (> 90%) monoclonal populations. If phenotypic traits have substantial inherited variation, low levels activity will decrease population variation these traits, which may affect function resilience species. We assessed nine by...