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| Bonsdorff, E; Blomqvist, Em; Mattila, J; Norkko, A. |
| The coastal and archipelago waters of the northern Baltic Sea are influenced by increasing eutrophication (significantly increasing temporal trends in nutrient availability). Increased nutrient levels and pelagic primary production have led to decreased transparency in the water body, increased plankton biomass, and increased amounts of filamentous algae. Large-scale and long-term (15-30 years) comparisons have shown that zoobenthic communities have changed significantly (altered species diversity, increased total abundance and increased biomass). The stress in the ecosystem is also illustrated at the population level (Macoma balthica). An increasing trend is shown for a near-shore fish community, where the increase in biomass has been linear over the past... |
| Tipo: Text |
Palavras-chave: Baltic Sea; Eutrophication; Long-term changes; Nutrient; Zoobenthos. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00093/20402/18069.pdf |
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| Bonsdorff, E. |
| Benthic colonization following physical disturbance was studied in shallow brackish waters at the SW coast of Finland, northern Baltic Sea. Following sand suction and periodic stagnation an annual colonization pattern is described in relation to continuous succession following channel dredging. The importance of different colonization mechanisms is discussed. The number of species recovers faster than abundance and biomass, and recovery from dredging may take as long as 5 years. Experiments show the stock of colonizing species and the immigration distance to be major structuring factors in macrozoobenthic community development. |
| Tipo: Text |
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| Ano: 1983 |
URL: http://archimer.ifremer.fr/doc/00247/35776/34289.pdf |
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