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Coastal darkening exacerbates eutrophication symptoms through bottom-up and top-down control modification

Garnier, Aurélie (author)
Sveriges lantbruksuniversitet,Swedish University of Agricultural Sciences,Department of Aquatic Resources, Swedish University of Agricultural Sciences, Uppsala, Sweden,Institutionen för akvatiska resurser
Östman, Örjan (author)
Sveriges lantbruksuniversitet,Swedish University of Agricultural Sciences,Department of Aquatic Resources, Swedish University of Agricultural Sciences, Uppsala, Sweden,Institutionen för akvatiska resurser
Ask, Jenny, 1976- (author)
Umeå universitet,Umeå University,Institutionen för ekologi, miljö och geovetenskap,Umeå marina forskningscentrum (UMF),EcoChange; UMFpub
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Bell, Olivia (author)
Sveriges lantbruksuniversitet,Swedish University of Agricultural Sciences,Department of Aquatic Resources, Swedish University of Agricultural Sciences, Uppsala, Sweden,Institutionen för akvatiska resurser
Berggren, Martin (author)
Lund University,Lunds universitet,BECC: Biodiversity and Ecosystem services in a Changing Climate,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Institutionen för naturgeografi och ekosystemvetenskap,Centre for Environmental and Climate Science (CEC),Faculty of Science,Dept of Physical Geography and Ecosystem Science,Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden
Rulli, Mayra P.D. (author)
Lund University,Lunds universitet,BECC: Biodiversity and Ecosystem services in a Changing Climate,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Institutionen för naturgeografi och ekosystemvetenskap,Centre for Environmental and Climate Science (CEC),Faculty of Science,Dept of Physical Geography and Ecosystem Science,Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden
Younes, Hani (author)
Lund University,Lunds universitet,BECC: Biodiversity and Ecosystem services in a Changing Climate,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Institutionen för naturgeografi och ekosystemvetenskap,Centre for Environmental and Climate Science (CEC),Faculty of Science,Dept of Physical Geography and Ecosystem Science,Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden
Huss, Magnus (author)
Sveriges lantbruksuniversitet,Swedish University of Agricultural Sciences,Department of Aquatic Resources, Swedish University of Agricultural Sciences, Uppsala, Sweden,Institutionen för akvatiska resurser
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 (creator_code:org_t)
 
2023-01-27
2023
English.
In: Limnology and Oceanography. - : Wiley. - 1939-5590 .- 0024-3590. ; 68:3, s. 678-691
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Coastal eutrophication due to excessive anthropogenic nutrient loading is a major threat worldwide, and especially in estuaries and semi-enclosed waterbodies, like the brackish Baltic Sea. In addition, coastal waters may become darker (coastal darkening) due to increased input of colored compounds from terrestrial run-off and sediment resuspension. Still, the effects of darkening on coastal food web responses to eutrophication are unknown. In a mesocosm experiment with benthic and pelagic habitats, we manipulated nutrient loading, presence of fish and light availability to disentangle bottom-up and top-down control of eutrophication symptoms in ambient and darkened waters. Overall, we found higher pelagic Chlorophyll a concentrations (a proxy of algal biomass) with darkening and with nutrient enrichment in both clear and dark waters. Albeit fish had a strong impact on zooplankton and zoobenthos, they had no cascading effect on algae. We conclude that coastal darkening due to changes in land use and climate change can pose an additional challenge concerning the recovery of coastal waters from eutrophication.

Subject headings

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
NATURVETENSKAP  -- Biologi -- Ekologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Ecology (hsv//eng)

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