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Large-scale nutrient pattern in the Gulf of Bothnia with the hydrodynamic of its loads
Linköping University, The Tema Institute.
2006 (English)Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Eutrophication, which is the most important degradation in water bodies, has been traced to the imposed loading of nutrients. Of interest is the fact that the process is often accompanied with undesirable effects, one of which is primarily the increased algae production at the surface and accumulation of biomass at the bottom and the secondary responses, which include a., change in species composition b. change in the biogeochemical cycle c. shift in the seasonal pattern and magnitude variability.

The biogeochemical cycle in response to hydrodynamic alterations may occur internally; however external loading often fosters the process over large spatial scales. In the quest of validating the above statement, we hypothesized that there is no difference in the mean concentration of nutrients in the Gulf of Bothnia from the overall mean concentration.

The analysis was done with a probability mapping method, in which all stations were grouped into a lattice. The cells are constructed using a grid system, i.e. x and y axis (longitude and latitude). Basically the method statistically tested for variables deviating from the over mean concentration. The variables analyzed are DIN, DSi, DIP and DIN: DSi.

Results of the analysis showed significant spatial variations in the nutrient distribution in the Gulf of Bothnia; such differences were observed in the coastal to the deep zones of the Gulf.

Place, publisher, year, edition, pages
Institutionen för tema , 2006. , 53 p.
Keyword [en]
Spatial Variation, Probability Mapping and Primary Production.
National Category
Natural Sciences
URN: urn:nbn:se:liu:diva-6797ISRN: LIU-TEMA/ES-D--06/03--SEOAI: diva2:22001
Subject / course
Master of Science Thesis (Magisteruppsats från Affärsjuridiska programmet)
2006-06-02, 00:00
Available from: 2006-09-18 Created: 2006-09-18 Last updated: 2012-09-10

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