Wadden Sea Eutrophication: Long-Term Trends and Regional Differences
| Autor: | Onur Kerimoglu, Justus van Beusekom, Hermann Lenhart, Lena Rönn, Hans Ruiter, Jacob Carstensen, Richard Hofmeister, Annika Grage, Johannes Rick, Johannes Pätsch, Kerstin Kolbe, Tobias Dolch |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
DYNAMICS 010504 meteorology & atmospheric sciences lcsh:QH1-199.5 long-term trends NUTRIENT Oceanography 01 natural sciences submersed vegetation Wadden Sea chemistry.chemical_compound Nutrient Barrier island PHYTOPLANKTON lcsh:Science Water Science and Technology Global and Planetary Change geography.geographical_feature_category biology LIMITATION sediments COASTAL EUTROPHICATION PHOSPHORUS Seagrass NORTH-SEA WESTERNMOST INLET North Sea Chlorophyll a eutrophication indicators WATER DISCHARGE Intertidal zone Ocean Engineering Aquatic Science lcsh:General. Including nature conservation geographical distribution nutrients Phytoplankton 14. Life underwater 0105 earth and related environmental sciences geography 010604 marine biology & hydrobiology Inlet biology.organism_classification NITROGEN chemistry 13. Climate action phytoplankton Environmental science lcsh:Q Eutrophication |
| Zdroj: | Beusekom, J.E.E.van; Carstensen, J.; Dolch, T.; Grage, A.; Hofmeister, R.; Lenhart, H.; Kerimoglu, O.; Kolbe, K.; Paetsch, J.; Rick, J.; Roenn, L.; Ruiter, H.: Wadden Sea Eutrophication: Long-Term Trends and Regional Differences. In: Frontiers in Marine Science. Vol. 6 (2019) 370. (DOI: /10.3389/fmars.2019.00370) van Beusekom, J E E, Carstensen, J, Dolch, T, Grage, A, Hofmeister, R, Lenhart, H, Kerimoglu, O, Kolbe, K, Pätsch, J, Rick, J, Rönn, L & Ruiter, H 2019, ' Wadden Sea Eutrophication : Long-Term Trends and Regional Differences ', Frontiers in Marine Science, vol. 6, 370 . https://doi.org/10.3389/fmars.2019.00370 Frontiers in Marine Science, Vol 6 (2019) |
| ISSN: | 2296-7745 |
| DOI: | 10.3389/fmars.2019.00370) |
| Popis: | The Wadden Sea is a shallow intertidal coastal sea, largely protected by barrier islands and fringing the North Sea coasts of Netherlands, Germany, and Denmark. It is subject to influences from both the North Sea and major European rivers. Nutrient enrichment from these rivers since the 1950s has impacted the Wadden Sea ecology including loss of seagrass, increased phytoplankton blooms, and increased green macroalgae blooms. Rivers are the major source of nutrients causing Wadden Sea eutrophication. The nutrient input of the major rivers impacting the Wadden Sea reached a maximum during the 1980s and decreased at an average pace of about 2.5% per year for total Nitrogen (TN) and about 5% per year for total Phosphorus (TP), leading to decreasing nutrient levels but also increasing N/P ratios. During the past decade, the lowest nutrient inputs since 1977 were observed but these declining trends are leveling out for TP. Phytoplankton biomass (measured as chlorophyll a) in the Wadden Sea has decreased since the 1980s and presently reached a comparatively low level. In tidal inlet stations with a long-term monitoring, summer phytoplankton levels correlate with riverine TN and TP loads but stations located closer to the coast behave in a more complex manner. Regional differences are observed, with highest chlorophyll a levels in the southern Wadden Sea and lowest levels in the northern Wadden Sea. Model data support the hypothesis that the higher eutrophication levels in the southern Wadden Sea are linked to a more intense coastward accumulation of organic matter produced in the North Sea. |
| Databáze: | OpenAIRE |
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