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Relations between Environmentally Disturbing Establishments and three Invertebrate Indicator Species in the Baltic Sea
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
2013 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In order to improve the knowledge about polluted areas in Sweden, Naturvårdsverket has

compiled a list of all establishments and other anthropological activities, so called MIFOobjects,

which emit harmful chemicals. Those activities which are placed on land might,

depending on factors such as closeness to the sea, water solubility, degradability and toxicity

of the chemicals have an impact on the biota in the Baltic Sea. In this study, spatial and

statistical methods were used to explore potential relations between the abundance of three

indicator organisms (Macoma balthica, Marenzelleria and Monoporeia affinis), closeness and

a second variable built risk class of MIFO-objects and local environmental factors (e.g., sea

depth, salinity) at the coast of Blekinge.

The impact of MIFO-objects on the abundance of the indicator organisms was analyzed with

both graphical and numerical multivariate analysis methods such as spearman analysis,

principal component analysis and canonical component analysis. Four types of variables

were created to enable the analysis. The first two variables were based one distance from

emission locations to the study sites. The other pair of variables comprised on variable built

on the cumulative risk assessment of the MIFO-objects given by Naturvårdsverket and

another that was based on a classification of the emitted pollutants according to their chemical


The analysis showed that the abundance of Marenzelleria was positively correlated with

MIFO-objects both in terms of risk assessment and chemical toxicity. This was probably a

result of the fact that Marenzelleria is less sensitive to pollutants and therefore more

competitive than other species in its habitat. Since the abundance of Macoma balthica

covaried a lot with environmental factors such as salinity it was difficult to distinguish the

impact of MIFO-object on the mussel. The statistical base of the abundance of Monoporeia

affinis was too small to make any conclusions about what is describing the abundance.

Place, publisher, year, edition, pages
UPTEC W, ISSN 1401-5765 ; 13016
Keyword [en]
MIFO-object, Macoma balthica, Monoporeia affinis, Marenzelleria spp
National Category
Environmental Sciences
URN: urn:nbn:se:uu:diva-201207OAI: diva2:626441
Educational program
Master Programme in Environmental and Water Engineering
Available from: 2013-12-13 Created: 2013-06-08 Last updated: 2013-12-13Bibliographically approved

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