dc.date.accessioned | 2020-09-10T18:21:47Z | |
dc.date.available | 2020-09-10T18:21:47Z | |
dc.date.created | 2020-09-03T10:38:28Z | |
dc.date.issued | 2020 | |
dc.identifier.citation | Lundsør, Elisabeth Stige, Leif Christian Sørensen, Kai Edvardsen, Bente . Long-term coastal monitoring data show nutrient-driven reduction in chlorophyll. Journal of Sea Research. 2020, 164 | |
dc.identifier.uri | http://hdl.handle.net/10852/79334 | |
dc.description.abstract | In this study we have compiled a long-term monitoring dataset from the inner Oslofjorden and supplemented it with short-term research data from the same station. Using generalized additive models analysing the data from this time series, we have examined how chlorophyll-a, hydrography, and various nutrient concentrations have changed during 1973–2017 and how they correlate. We describe the seasonality in chlorophyll-a, nitrogen, phosphorus, Secchi-depth, temperature and salinity and how the levels of each variable have changed the last forty years. The results show specifically how levels of chlorophyll-a have decreased significantly and how this correlates with decrease in nitrogen and phosphorus levels. Our results show a significantly positive correlation between chlorophyll-a and phosphorus during spring bloom and between chlorophyll-a and nitrogen during autumn bloom. However, phosphorus levels have increased again during the last 20 years, but chlorophyll-a levels are still low, indicating that the chlorophyll-a level currently may be controlled by the continuous decreasing trend in nitrogen. If nitrogen increase again, the chlorophyll-a level may also begin to increase. The impact of increasing temperature and possible change in starting point for the growing season should be studied further. | |
dc.language | EN | |
dc.publisher | Nederlands Instituut voor Onderzoek der Zee | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | Long-term coastal monitoring data show nutrient-driven reduction in chlorophyll | |
dc.type | Journal article | |
dc.creator.author | Lundsør, Elisabeth | |
dc.creator.author | Stige, Leif Christian | |
dc.creator.author | Sørensen, Kai | |
dc.creator.author | Edvardsen, Bente | |
cristin.unitcode | 185,15,29,0 | |
cristin.unitname | Institutt for biovitenskap | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 1826994 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Sea Research&rft.volume=164&rft.spage=&rft.date=2020 | |
dc.identifier.jtitle | Journal of Sea Research | |
dc.identifier.volume | 164 | |
dc.identifier.pagecount | 13 | |
dc.identifier.doi | https://doi.org/10.1016/j.seares.2020.101925 | |
dc.identifier.urn | URN:NBN:no-82437 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 1385-1101 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/79334/2/Lunds%25C3%25B8r_2020_Article.pdf | |
dc.type.version | PublishedVersion | |
cristin.articleid | 101925 | |
dc.relation.project | NFR/280468 | |
dc.relation.project | NFR/262960 | |