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  • 1.
    Delling, Bo
    Naturhistoriska riksmuseet, Enheten för zoologi.
    Evolution and disappearance of sympatric Coregonus albula ina changing environment—A case study of the only remainingpopulation pair in Sweden2019Inngår i: Ecology and Evolution, ISSN 2045-7758, E-ISSN 2045-7758, Vol. 9, nr 22, s. 12727-12753Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    During the past 50 years, Fennoscandian populations of spring‐spawning Baltic cisco

    (

    Coregonus albula), sympatric to common autumn‐spawners, have declined or disappeared;

    for example, three out of four known spring‐spawning populations in Sweden

    are regarded as extinct. Over the same period, the climate has changed and populations

    have been subject to other anthropogenic stressors. We compared historic

    (1960s) and recent (1990–000s) morphological data from the still‐existent sympatric

    cisco populations in Lake Fegen, Sweden. Phenotypic changes were found for

    spring‐spawners making them more similar to the sympatric autumn‐spawners that

    had remained virtually unchanged. Based on results for other salmoniform fishes,

    a phenotypically plastic response to increased temperature during early development

    appears unlikely. The recent material was also analyzed with microsatellite

    markers; long‐term effective population size in spring‐spawners was estimated to

    be about 20 times lower than autumn‐spawners, with signs of long‐term gene flow

    in both directions and a recent genetic bottleneck in spring‐spawners. We suggest

    the change toward a less distinct phenotype in spring‐spawners to reflect a recent

    increase in gene flow from autumn‐spawners. Time since divergence was estimated

    to only

    c. 1,900 years (95% CI: 400–5,900), but still the Fegen populations represent

    the most morphologically and genetically distinct sympatric populations studied.

    Consequently, we hypothesize that less distinct population pairs can be even

    younger and that spring‐spawning may have repeatedly evolved and disappeared in

    several lakes since the end of the last glaciation, concurrent with changed environmental

    conditions.

  • 2.
    Delling, Bo
    et al.
    Naturhistoriska riksmuseet, Enheten för zoologi.
    Palm, Stefan
    Palkopoulou, Eleftheria
    Prestegaard, Tore
    Genetic signs of multiple colonization events in Baltic ciscoes with radiation into sympatric spring- and autumnspawners confined to early postglacial arrival2014Inngår i: Ecology and Evolution, ISSN 2045-7758, E-ISSN 2045-7758, Vol. 4, nr 22, s. 4346-4360Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Presence of sympatric populations may reflect local diversification or secondary contact of already distinct forms. The Baltic cisco (Coregonus albula) normally spawns in late autumn, but in a few lakes in Northern Europe sympatric autumn and spring- or winter-spawners have been described. So far, the evolutionary relationships and taxonomic status of these main life history forms have remained largely unclear. With microsatellites and mtDNA sequences, we analyzed extant and extinct spring- and autumn-spawners from a total of 23 Swedish localities, including sympatric populations. Published sequences from Baltic ciscoes in Germany and Finland, and Coregonus sardinella from North America were also included together with novel mtDNA sequences from Siberian C. sardinella. A clear genetic structure within Sweden was found that included two population assemblages markedly differentiated at microsatellites and apparently fixed for mtDNA haplotypes from two distinct clades. All sympatric Swedish populations belonged to the same assemblage, suggesting parallel evolution of spring-spawning rather than secondary contact. The pattern observed further suggests that postglacial immigration to Northern Europe occurred from at least two different refugia. Previous results showing that mtDNA in Baltic cisco is paraphyletic with respect to North American C. sardinella were confirmed. However, the inclusion of Siberian C. sardinella revealed a more complicated pattern, as these novel haplotypes were found within one of the two main C. albula clades and were clearly distinct from those in North American C. sardinella. The evolutionary history of Northern Hemisphere ciscoes thus seems to be more complex than previously recognized.

  • 3.
    Ersmark, Erik
    et al.
    Naturhistoriska riksmuseet, Enheten för bioinformatik och genetik.
    Baryshnikov, Gennady
    Higham, Thomas
    Argant, Alain
    Castanos, Pedro
    Doeppes, Doris
    Gasparik, Mihaly
    Germonpre, Mietje
    Liden, Kerstin
    Lipecki, Grzegorz
    Marciszak, Adrian
    Miller, Rebecca
    Moreno-Garcia, Marta
    Pacher, Martina
    Robu, Marius
    Rodriguez-Varela, Ricardo
    Rojo Guerra, Manuel
    Sabol, Martin
    Spassov, Nikolai
    Stora, Jan
    Valdiosera, Christina
    Villaluenga, Aritza
    Stewart, John R.
    Dalen, Love
    Naturhistoriska riksmuseet, Enheten för bioinformatik och genetik.
    Genetic turnovers and northern survival during the last glacial maximum in European brown bears2019Inngår i: Ecology and Evolution, ISSN 2045-7758, E-ISSN 2045-7758, Vol. 9, nr 10, s. 5891-5905Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The current phylogeographic pattern of European brown bears (Ursus arctos) has commonly been explained by postglacial recolonization out of geographically distinct refugia in southern Europe, a pattern well in accordance with the expansion/contraction model. Studies of ancient DNA from brown bear remains have questioned this pattern, but have failed to explain the glacial distribution of mitochondrial brown bear clades and their subsequent expansion across the European continent. We here present 136 new mitochondrial sequences generated from 346 remains from Europe, ranging in age between the Late Pleistocene and historical times. The genetic data show a high Late Pleistocene diversity across the continent and challenge the strict confinement of bears to traditional southern refugia during the last glacial maximum (LGM). The mitochondrial data further suggest a genetic turnover just before this time, as well as a steep demographic decline starting in the mid-Holocene. Levels of stable nitrogen isotopes from the remains confirm a previously proposed shift toward increasing herbivory around the LGM in Europe. Overall, these results suggest that in addition to climate, anthropogenic impact and inter-specific competition may have had more important effects on the brown bear's ecology, demography, and genetic structure than previously thought.

  • 4. Hambäck, Peter A.
    et al.
    Weingartner, Elisabeth
    Dalén, Love
    Naturhistoriska riksmuseet, Enheten för bioinformatik och genetik.
    Wirta, Helena
    Roslin, Tomas
    Spatial subsidies in spider diets vary with shoreline structure: Complementary evidence from molecular diet analysis and stable isotopes2016Inngår i: Ecology and Evolution, ISSN 2045-7758, E-ISSN 2045-7758, Vol. 6, nr 23, s. 8431-8439Artikkel i tidsskrift (Fagfellevurdert)
  • 5.
    Kadin, Martina
    Naturhistoriska riksmuseet, Enheten för miljöforskning och övervakning.
    Niiranen, Susa
    Converse, Sarah J
    Linking demographic and food‐web models to understand management trade‐offs2019Inngår i: Ecology and Evolution, ISSN 2045-7758, E-ISSN 2045-7758Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Alternatives in ecosystem‐based management often differ with respect to trade‐offs between ecosystem values. Ecosystem or food‐web models and demographic models are typically employed to evaluate alternatives, but the approaches are rarely integrated to uncover conflicts between values. We applied multistate models to a capture–recapture dataset on common guillemots Uria aalge breeding in the Baltic Sea to identify factors influencing survival. The estimated relationships were employed together with Ecopath‐with‐Ecosim food‐web model simulations to project guillemot survival under six future scenarios incorporating climate change. The scenarios were based on management alternatives for eutrophication and cod fisheries, issues considered top priority for regional management, but without known direct effects on the guillemot population. Our demographic models identified prey quantity (abundance and biomass of sprat Sprattus sprattus) as the main factor influencing guillemot survival. Most scenarios resulted in projections of increased survival, in the near (2016–2040) and distant (2060–2085) future. However, in the scenario of reduced nutrient input and precautionary cod fishing, guillemot survival was projected to be lower in both future periods due to lower sprat stocks. Matrix population models suggested a substantial decline of the guillemot population in the near future, 24% per 10 years, and a smaller reduction, 1.1% per 10 years, in the distant future. To date, many stakeholders and Baltic Sea governments have supported reduced nutrient input and precautionary cod fishing and implementation is underway. Negative effects on nonfocal species have previously not been uncovered, but our results show that the scenario is likely to negatively impact the guillemot population. Linking model results allowed identifying trade‐offs associated with management alternatives. This information is critical to thorough evaluation by decision‐makers, but not easily obtained by food‐web models or demographic models in isolation. Appropriate datasets are often available, making it feasible to apply a linked approach for better‐informed decisions in ecosystem‐based management.

  • 6. Kuhn, Kerstin
    et al.
    Schwenk, Klaus
    Both, Christiaan
    Canal, David
    Johansson, Ulf S.
    Naturhistoriska riksmuseet, Enheten för zoologi.
    van der Mije, Steven
    Töpfer, Till
    Päckert, Martin
    Differentiation in neutral genes and a candidate gene in the pied flycatcher: using biological archives to track globalclimate change2013Inngår i: Ecology and Evolution, ISSN 2045-7758, E-ISSN 2045-7758, Vol. 3, nr 14, s. 4799-4799Artikkel i tidsskrift (Fagfellevurdert)
  • 7. Naud, Lucy
    et al.
    Masviken, Johannes
    Naturhistoriska riksmuseet, Enheten för bioinformatik och genetik.
    Freire, Susana
    Angerbjorn, Anders
    Dalen, Love
    Naturhistoriska riksmuseet, Enheten för bioinformatik och genetik.
    Dalerum, Fredrik
    Altitude effects on spatial components of vascular plant diversity in a subarctic mountain tundra2019Inngår i: Ecology and Evolution, ISSN 2045-7758, E-ISSN 2045-7758, Vol. 9, nr 8, s. 4783-4795Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Environmental gradients are caused by gradual changes in abiotic factors, which affect species abundances and distributions, and are important for the spatial distribution of biodiversity. One prominent environmental gradient is the altitude gradient. Understanding ecological processes associated with altitude gradients may help us to understand the possible effects climate change could have on species communities. We quantified vegetation cover, species richness, species evenness, beta diversity, and spatial patterns of community structure of vascular plants along altitude gradients in a subarctic mountain tundra in northern Sweden. Vascular plant cover and plant species richness showed unimodal relationships with altitude. However, species evenness did not change with altitude, suggesting that no individual species became dominant when species richness declined. Beta diversity also showed a unimodal relationship with altitude, but only for an intermediate spatial scale of 1km. A lack of relationships with altitude for either patch or landscape scales suggests that any altitude effects on plant spatial heterogeneity occurred on scales larger than individual patches but were not effective across the whole landscape. We observed both nested and modular patterns of community structures, but only the modular patterns corresponded with altitude. Our observations point to biotic regulations of plant communities at high altitudes, but we found both scale dependencies and inconsistent magnitude of the effects of altitude on different diversity components. We urge for further studies evaluating how different factors influence plant communities in high altitude and high latitude environments, as well as studies identifying scale and context dependencies in any such influences.

  • 8. von Rönn, Jan A. C.
    et al.
    Grüebler, Martin U.
    Fransson, Thord
    Naturhistoriska riksmuseet, Enheten för miljöforskning och övervakning.
    Köppen, Ulrich
    Korner-Nievergelt, Fränzi
    Integrating stable isotopes, parasite, and ring-reencounterdata to quantify migratory connectivity—A case study with Barn Swallows breeding in Switzerland, Germany, Sweden, andFinland2020Inngår i: Ecology and Evolution, ISSN 2045-7758, E-ISSN 2045-7758Artikkel i tidsskrift (Fagfellevurdert)
  • 9. Williams, Laura
    et al.
    Colesie, C
    Ullmann, A
    Westberg, Martin
    Naturhistoriska riksmuseet, Enheten för botanik.
    Wedin, Mats
    Naturhistoriska riksmuseet, Enheten för botanik.
    Büdel, B.
    Corrigendum to: Lichen acclimation to changing environments: Photobiont switching vs. climate-specific uniqueness in Psora decipiens2017Inngår i: Ecology and Evolution, ISSN 2045-7758, E-ISSN 2045-7758, Vol. 7, s. 7130-Artikkel i tidsskrift (Fagfellevurdert)
  • 10. Williams, Laura
    et al.
    Colesie, C
    Ullmann, A
    Westberg, Martin
    Naturhistoriska riksmuseet, Enheten för botanik.
    Wedin, Mats
    Naturhistoriska riksmuseet, Enheten för botanik.
    Büdel, B
    Lichen acclimation to changing environments:photobiont switching vs. climate specific uniqueness in Psora decipiens.2017Inngår i: Ecology and Evolution, ISSN 2045-7758, E-ISSN 2045-7758, Vol. 7, s. 2560-2574Artikkel i tidsskrift (Fagfellevurdert)
  • 11. Zanatta, Florian
    et al.
    Vanderpoorten, Alain
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Johansson, Victor
    Patiño, Jairo
    Lönnell, Niklas
    Hylander, Kristoffer
    Under which humidity conditions are moss spores released? A comparison between species with perfect and specialized peristomes2018Inngår i: Ecology and Evolution, ISSN 2045-7758, E-ISSN 2045-7758, Vol. 8, s. 11484-11491Artikkel i tidsskrift (Fagfellevurdert)
1 - 11 of 11
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