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| 3. |
- Nilsson, Jonas, et al.
(author)
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Havsmiljöns tillstånd : ur ett miljömåls perspektiv
- 2011
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In: Havet 2011. - Göteborg ; Stockholm : Havs-och vattenmyndigheten, Naturvårdsverket och Havsmiljöinstitutet. - 9789162012885 - 9789163397639 - 9789187025006 ; , s. 6-12
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Book chapter (other academic/artistic)
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| 4. |
- Nydahl, Anna, 1981-, et al.
(author)
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Increased microbial activity in a warmer and wetter climate enhances the risk of coastal hypoxia
- 2013
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In: FEMS Microbiology Ecology. - Hoboken : Wiley-Blackwell. - 0168-6496 .- 1574-6941. ; 85:2, s. 338-347
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Journal article (peer-reviewed)abstract
- The coastal zone is the most productive area of the marine environment and the area that is most exposed to environmental drivers associated with human pressures in a watershed. In dark bottle incubation experiments, we investigated the short-term interactive effects of changes in salinity, temperature and riverine dissolved organic matter (rDOM) on microbial respiration, growth and abundance in an estuarine community. An interaction effect was found for bacterial growth, where the assimilation of rDOM increased at higher salinities. A 3 °C rise in the temperature had a positive effect on microbial respiration. A higher concentration of DOM consistently enhanced respiration and bacterial abundance, while an increase in temperature reduced bacterial abundance. The latter result was most likely caused by a positive interaction effect of temperature, salinity and rDOM on the abundance of bacterivorous flagellates. Elevated temperature and precipitation, causing increased discharges of rDOM and an associated lowered salinity, will therefore primarily promote bacterial respiration, growth and bacterivore abundance. Our results suggest a positive net outcome for microbial activity under the projected climate change, driven by different, partially interacting environmental factors. Thus, hypoxia in coastal zones may increase due to enhanced respiration caused by higher temperatures and rDOM discharge acting synergistically.
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| 5. |
- Panigrahi, Satya, et al.
(author)
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Strong seasonal effect of moderate experimental warming on plankton respiration in a temperate estuarine plankton community
- 2013
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In: Estuarine, Coastal and Shelf Science. - : Academia Press. - 0272-7714 .- 1096-0015. ; 136, s. 269-279
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Journal article (peer-reviewed)abstract
- Climate change projections forecast a 1.1-6.4 °C global increase in surface water temperature and a 3 °C increase for the Baltic Sea. This study examined the short-term interactive effects of a realistic future temperature increase (3 °C) on pelagic respiration and bacterioplankton growth and phytoplanktonphotosynthesis in situ. This study was undertaken throughout a full seasonal cycle in the northern Baltic Sea. We found marked positive short-term effects of temperature on plankton respiration but no significant effect on bacterioplankton growth or phytoplankton photosynthesis. Absolute respiration rates remained similar to other comparable environments at the in situ temperature. With the 3 °C temperature increase, respiration rates in situ increased up to 5-fold during the winter and 2-fold during the summer. A maximum seasonal Q10 value of 332 was observed for respiration during the cold winter months (twater z 0 C), and summer Q10 values were comparatively high (9.1). Q10 values exhibited a significant inverse relationship to water temperature during winter. Our results thereby suggest that plankton respiration in this coastal zone is more temperature sensitive than previously reported. In addition, field data indicated that plankton respiration switched from being temperature limited to being limited by dissolved organic carbon (DOC) after the simulated temperature increase. Assuming that our observations are relevant over longer time scales, climate change may worsen hypoxia, increase CO2 emissions and create a more heterotrophic food web in coastal zones with a high load of riverine DOC.
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| 6. |
- Rogers, Stuart, et al.
(author)
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Marine strategy framework directive : Task Group 4 report : food webs
- 2010
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Reports (other academic/artistic)abstract
- The Marine Strategy Framework Directive (2008/56/EC) (MSFD) requires that the European Commis-sion (by 15 July 2010) should lay down criteria and methodological standards to allow consistency in approach in evaluating the extent to which Good Environmental Status (GES) is being achieved. ICES and JRC were contracted to provide scientific support for the Commission in meeting this obligation.A total of 10 reports have been prepared relating to the descriptors of GES listed in Annex I of the Directive. Eight reports have been prepared by groups of independent experts coordinated by JRC and ICES in response to this contract. In addition, reports for two descriptors (Contaminants in fish and other seafood and Marine Litter) were written by expert groups coordinated by DG SANCO and IFREMER respectively.A Task Group was established for each of the qualitative Descriptors. Each Task Group consisted of selected experts providing experience related to the four marine regions (the Baltic Sea, the North-east Atlantic, the Mediterranean Sea and the Black Sea) and an appropriate scope of relevant scientif-ic expertise. Observers from the Regional Seas Conventions were also invited to each Task Group to help ensure the inclusion of relevant work by those Conventions. This is the report of Task Group 4 Food webs.
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| 7. |
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| 8. |
- Wikner, Johan, 1961-, et al.
(author)
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Pelagial biologi : plankton
- 2012
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In: Havet 2012. - Stockholm / Göteborg : Havsmiljöinstitutet och Havs- och vattenmyndigheten. - 9789198064612 - 9789187025129 ; , s. 46-46
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Book chapter (other academic/artistic)
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| 9. |
- Wikner, Johan, 1961-, et al.
(author)
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Pelagial biologi : plankton
- 2011
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In: Havet 2011. - Stockholm : Naturvårdsverket, Havsmiljöinstitutet och Havs- och vattenmyndigheten. - 9789162012885 - 9789163397639 - 9789187025006 ; , s. 30-30
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Book chapter (other academic/artistic)
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| 10. |
- Wikner, Johan, 1961-, et al.
(author)
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Plankton
- 2010
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In: Havet. - Stockholm : Naturvårdsverket. - 9789162012816 - 9789163369469 ; , s. 30-30
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Book chapter (other academic/artistic)
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