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Wahl, Martin; Werner, Franziska Julie; Buchholz, Björn; Raddatz, Stefanie; Graiff, Angelika; Matthiessen, Birte; Karsten, Ulf; Hiebenthal, Claas; Hamer, Jorin; Ito, Maysa; Gülzow, Elisa; Rilov, Gil; Guy-Haim, Tamar (2019): Experiment on impacts of ocean warming and biotic stress in a coastal seaweed ecosystem. PANGAEA, https://doi.org/10.1594/PANGAEA.906912, Supplement to: Wahl, M et al. (2020): Season affects strength and direction of the interactive impacts of ocean warming and biotic stress in a coastal seaweed ecosystem. Limnology and Oceanography, 65(4), 807-827, https://doi.org/10.1002/lno.11350

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Abstract:
The plea for using more “realistic,” community‐level, investigations to assess the ecological impacts of global change has recently intensified. Such experiments are typically more complex, longer, more expensive, and harder to interpret than simple organism‐level benchtop experiments. Are they worth the extra effort? Using outdoor mesocosms, we investigated the effects of ocean warming (OW) and acidification (OA), their combination (OAW), and their natural fluctuations on coastal communities of the western Baltic Sea during all four seasons. These communities are dominated by the perennial and canopy‐forming macrophyte Fucus vesiculosus—an important ecosystem engineer Baltic‐wide. We, additionally, assessed the direct response of organisms to temperature and pH in benchtop experiments, and examined how well organism‐level responses can predict community‐level responses to the dominant driver, OW. OW affected the mesocosm communities substantially stronger than acidification. OW provoked structural and functional shifts in the community that differed in strength and direction among seasons. The organism‐level response to OW matched well the community‐level response of a given species only under warm and cold thermal stress, that is, in summer and winter. In other seasons, shifts in biotic interactions masked the direct OW effects. The combination of direct OW effects and OW‐driven shifts of biotic interactions is likely to jeopardize the future of the habitat‐forming macroalga F. vesiculosus in the Baltic Sea. Furthermore, we conclude that seasonal mesocosm experiments are essential for our understanding of global change impact because they take into account the important fluctuations of abiotic and biotic pressures.
Coverage:
Latitude: 54.330000 * Longitude: 10.150000
Date/Time Start: 2016-11-16T00:00:00 * Date/Time End: 2016-11-30T00:00:00
Size:
13 datasets

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Datasets listed in this publication series

  1. Wahl, M; Werner, FJ; Buchholz, B et al. (2019): Bench-top experiment on Fucus antifeeding defense under different temperature levels. https://doi.org/10.1594/PANGAEA.907110
  2. Wahl, M; Werner, FJ; Buchholz, B et al. (2019): Bench-top experiment on Fucus antifouling defense assessed as settlement of the marine diatom Amphora on surfaces coated with extract of Fucus in comparison to surface coated with solvant only. https://doi.org/10.1594/PANGAEA.907350
  3. Wahl, M; Werner, FJ; Buchholz, B et al. (2019): Bench-top experiment on Fucus oxygen production under different levels of acidification. https://doi.org/10.1594/PANGAEA.906917
  4. Wahl, M; Werner, FJ; Buchholz, B et al. (2019): Bench-top experiment on Fucus relative growth of thallus tips in response to temperatures. https://doi.org/10.1594/PANGAEA.907108
  5. Wahl, M; Werner, FJ; Buchholz, B et al. (2019): Bench-top experiment on Fucus reproduction in response to temperature. https://doi.org/10.1594/PANGAEA.907132
  6. Wahl, M; Werner, FJ; Buchholz, B et al. (2019): Bench-top experiment on Fucus responses to temperatures in thermobaths. https://doi.org/10.1594/PANGAEA.906911
  7. Wahl, M; Werner, FJ; Buchholz, B et al. (2019): Bench-top experiment on Gammarus grazing response to temperature assessed as feces production while feeding on Fucus-based food pellets. https://doi.org/10.1594/PANGAEA.907133
  8. Wahl, M; Werner, FJ; Buchholz, B et al. (2019): Bench-top experiment on Idotea grazing response to acidification assessed as feces production while feeding on Fucus-based food pellets. https://doi.org/10.1594/PANGAEA.907349
  9. Wahl, M; Werner, FJ; Buchholz, B et al. (2019): Bench-top experiment on Idotea grazing response to temperature assessed as feces production while feeding on Fucus-based food pellets. https://doi.org/10.1594/PANGAEA.907134
  10. Wahl, M; Werner, FJ; Buchholz, B et al. (2019): Bench-top experiment on Littorina grazing response to temperature assessed biomass loss of Fucus-based food pellets. https://doi.org/10.1594/PANGAEA.907348
  11. Wahl, M; Werner, FJ; Buchholz, B et al. (2019): Bench-top experiment on fouling rate assessed on hard substrate in thermobaths using natural unfiltered sea water. https://doi.org/10.1594/PANGAEA.907347
  12. Wahl, M; Werner, FJ; Buchholz, B et al. (2019): Bench-top experiment on response of Fucus photosynthesis (oxygen production) to light intensity. https://doi.org/10.1594/PANGAEA.907359
  13. Wahl, M; Werner, FJ; Buchholz, B et al. (2019): Seasonal mesocosm community experiments with warming and acidification treatments in Kiel Outdoor Benthocosms. https://doi.org/10.1594/PANGAEA.907357