Warming has stronger direct than indirect effects on benthic microalgae in a seaweed system in spring
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| Autores principales: | , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
2017
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| _version_ | 1867171370657382400 |
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| author | Werner, Franziska Julie Matthiessen, Birte |
| author_facet | Werner, Franziska Julie Matthiessen, Birte |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Using outdoor mesocosms we investigated the relative importance of the direct and indirect (here: altered grazing) effects of seawater warming on benthic microalgae in a Baltic Sea Fucus vesiculosus (Phaeophyceae) system during the spring season. Seawater warming had a direct positive effect on microalgal total biomass accrual and growth rate and on total mesograzer abundance and biomass. Moreover, under the existing resource-replete conditions in spring the direct positive effect of warming on microalgae was stronger than the indirect negative effect through enhanced grazing. The outcome of this study contrasts previous observations from the summer and winter season, where indirect effects of warming mediated by altered grazing were identified as an important driver of primary biomass in the Fucus system. In this context, the results from the spring season add mechanistic information to the overall understanding of the seasonal variability of climate change effects. They suggest that the relative importance of the underlying direct and indirect effective pathways of warming and the overall effect on the balance between production and consumption are influenced by the trophic state of the system, which in temperate regions is related to season. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_872416 |
| institution | PANGAEA |
| language | en |
| publishDate | 2017 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Warming has stronger direct than indirect effects on benthic microalgae in a seaweed system in spring Werner, Franziska Julie Matthiessen, Birte BIOACID; Biological Impacts of Ocean Acidification Using outdoor mesocosms we investigated the relative importance of the direct and indirect (here: altered grazing) effects of seawater warming on benthic microalgae in a Baltic Sea Fucus vesiculosus (Phaeophyceae) system during the spring season. Seawater warming had a direct positive effect on microalgal total biomass accrual and growth rate and on total mesograzer abundance and biomass. Moreover, under the existing resource-replete conditions in spring the direct positive effect of warming on microalgae was stronger than the indirect negative effect through enhanced grazing. The outcome of this study contrasts previous observations from the summer and winter season, where indirect effects of warming mediated by altered grazing were identified as an important driver of primary biomass in the Fucus system. In this context, the results from the spring season add mechanistic information to the overall understanding of the seasonal variability of climate change effects. They suggest that the relative importance of the underlying direct and indirect effective pathways of warming and the overall effect on the balance between production and consumption are influenced by the trophic state of the system, which in temperate regions is related to season. |
| title | Warming has stronger direct than indirect effects on benthic microalgae in a seaweed system in spring |
| topic | BIOACID; Biological Impacts of Ocean Acidification |
| url | https://doi.org/10.1594/PANGAEA.872416 |