| 1. |
- Ahme, Antonia, et al.
(författare)
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Warming increases the compositional and functional variability of a temperate protist community
- 2024
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Ingår i: Science of the Total Environment. - 0048-9697 .- 1879-1026. ; 926
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Tidskriftsartikel (refereegranskat)abstract
- Phototrophic protists are a fundamental component of the world's oceans by serving as the primary source of energy, oxygen, and organic nutrients for the entire ecosystem. Due to the high thermal seasonality of their habitat, temperate protists could harbour many well-adapted species that tolerate ocean warming. However, these species may not sustain ecosystem functions equally well. To address these uncertainties, we conducted a 30-day mesocosm experiment to investigate how moderate (12 °C) and substantial (18 °C) warming compared to ambient conditions (6 °C) affect the composition (18S rRNA metabarcoding) and ecosystem functions (biomass, gross oxygen productivity, nutritional quality – C:N and C:P ratio) of a North Sea spring bloom community. Our results revealed warming-driven shifts in dominant protist groups, with haptophytes thriving at 12 °C and diatoms at 18 °C. Species responses primarily depended on the species' thermal traits, with indirect temperature effects on grazing being less relevant and phosphorus acting as a critical modulator. The species Phaeocystis globosa showed highest biomass on low phosphate concentrations and relatively increased in some replicates of both warming treatments. In line with this, the C:P ratio varied more with the presence of P. globosa than with temperature. Examining further ecosystem responses under warming, our study revealed lowered gross oxygen productivity but increased biomass accumulation whereas the C:N ratio remained unaltered. Although North Sea species exhibited resilience to elevated temperatures, a diminished functional similarity and heightened compositional variability indicate potential ecosystem repercussions for higher trophic levels. In conclusion, our research stresses the multifaceted nature of temperature effects on protist communities, emphasising the need for a holistic understanding that encompasses trait-based responses, indirect effects, and functional dynamics in the face of exacerbating temperature changes.
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| 2. |
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| 3. |
- Brunk, Katja H., et al.
(författare)
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Creating a Consumable Past: How Memory Making Shapes Marketization
- 2018
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Ingår i: Journal of consumer research. - : Oxford University Press (OUP). - 0093-5301 .- 1537-5277. ; 44:6, s. 1325-1342
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Tidskriftsartikel (refereegranskat)abstract
- Consumer researchers tend to equate successful marketization—the transition from a socialist to a capitalist economy—with the consensual acquiescence to an idealized definition of the socialist past. For this reason, little research has examined how memories about socialism influence marketization over time. To redress this gap, we bring prior consumer research on commercial mythmaking and popular memory to bear on an in-depth analysis of the marketization of the former German Democratic Republic. We find that, owing to a progressive sequence of conflicts between commercialized memories of socialism promoted by marketing agents and countermemories advocating socialism as a political alternative, definitions of the past, and by extension, capitalism’s hegemony are subject to ongoing contestation and change. Our theoretical framework of hegemonic memory making explains relationships among consumption, memory making, and market systems that have not been recognized by prior research on consumption and nostalgia.
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| 6. |
- Hartmann, Benjamin J., 1981, et al.
(författare)
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The Production and Consumption of Retro Brands Beyond Meaning Revival
- 2018
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Ingår i: Advances in Consumer Research. - 0098-9258. ; 46, s. 402-405
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Tidskriftsartikel (refereegranskat)abstract
- While past research articulates retro branding predominantly as brand meaning revival, our findings from a historical analysis of the production and consumption of retro brands in Germany reveal how these commercialized representations of the past operate also via brand meaning inversion (retroversion) and brand meaning invention (retrovention).
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| 7. |
- Humborg, Christoph, et al.
(författare)
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Environmental Impacts - Freshwater Biogeochemistry
- 2015
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Ingår i: Second Assessment of Climate Change for the Baltic Sea Basin. - Cham : Springer. - 9783319160054 - 9783319160061 ; , s. 307-336
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Bokkapitel (refereegranskat)abstract
- Climate change effects on freshwater biogeochemistry and riverine loads of biogenic elements to the Baltic Sea are not straight forward and are difficult to distinguish from other human drivers such as atmospheric deposition, forest and wetland management, eutrophication and hydrological alterations. Eutrophication is by far the most well-known factor affecting the biogeochemistry of the receiving waters in the various sub-basins of the Baltic Sea. However, the present literature review reveals that climate change is a compounding factor for all major drivers of freshwater biogeochemistry discussed here, although evidence is still often based on short-term and/or small-scale studies.
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| 8. |
- Humborg, Christoph, et al.
(författare)
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Environmental Impacts—Freshwater Biogeochemistry
- 2015
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Ingår i: Second Assessment of Climate Change for the Baltic Sea Basin. - Cham : Springer. - 9783319160054 - 9783319160061 ; , s. 307-336
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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