Environmental changes of the last three centuries indicated by siliceous microfossil records from the southwestern Baltic Sea
Bibliographic Data
| ID | 12268179 |
|---|---|
| Authors | Elinor Andrén (0000-0002-6763-1697, Stockholm University, corresponding author), Graham Shimmield (Dunstaffnage Marine Laboratory, Oban, Argyll PA37 4AD, UK), Timothy Brand (University of Edinburgh) |
| Year | 1999 |
| Volume | 9 |
| Issue | 1 |
| Pages | 25-38 |
| Publication date | 1999-01-01 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | The Holocene (JOURNAL) |
| Journal identifiers | ISSN: 0959-6836 • E-ISSN: 1477-0911 |
| Publisher | SAGE Publishing (PUBLISHER • US) |
| DOI | 10.1191/095968399676523977 |
| OpenAlex | W2048573778 |
| Language | EN |
| Citations received | 7 |
| References cited | 36 |
Four short sediment cores from the southwestern Baltic Sea were analysed with respect to their content of siliceous microfossils. The aim was to detect and date changes in the composition of the diatom flora and to link these changes to variations in the anthropogenic load of nutrients during the last century. The study shows that the most significant change in the diatom assemblages occurred 130-140 years ago. The change is recorded in the sediments as a shift from periphytic diatom taxa to a predominance of planktonic taxa. This indicates that the photic layer has decreased in depth, probably due to eutrophication of the Baltic Sea, which consequently began to affect the area investigated approximately AD 1850. To support the results of a changing ratio of periphytic to planktonic diatoms, diatom accumulation rates were calculated. In general, the diatom accumulation rate data show a decrease in the periphytic accumulation rates and an increase in the planktonic accumulation rates towards the sediment surface. Some indications of a colder climate are recorded in the sediments approximately 230 years ago. These results are in accordance with the record of maximum extent of sea ice in the same area and are suggested to represent a late stage in the ‘Little Ice Age’
Biology · Climate change · Diatom · Eutrophication · Nutrient · Photic zone · Phytoplankton · Plankton · Sediment · Environmental Science · Geology and Paleoclimatology Research · Isotope Analysis in Ecology · Marine and environmental studies · Ecology · Geology · Oceanography · Paleontology
Environmental changes during isolation processes from the Litorina Sea as reflected by diatoms and geochemical parameters -a case study
Silicon Retention in River Basins
Quantifying Background Nutrient Concentrations in Coastal Waters
Holocene history of the Baltic Sea as a background for assessing records of human impact in the sediments of the Gotland Basin
Silicon Retention in River Basins
Impacts of Eutrophication on Diatom Life Forms and Species Richness in Coastal Waters of the Baltic Sea
Quantifying Background Nutrient Concentrations in Coastal Waters
| Citations per year | 0.27 |
|---|---|
| Citation span | 2000 - 2007 (8) |
| Highly cited | No |