Essays about: "ekologi"

Showing result 31 - 35 of 762 essays containing the word ekologi.

1. 31. Historical mining of Fe-Ca ore in Garpenberg, Sweden. : A study based on lake sediment geochemistry from Finnhytte-dammsjön.

   University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Author : Morgan Eliasson; [2023]
   Keywords : Paleolimnology; Lake sediment; XRF; Garpenberg; Mining history;

   Abstract : It is well established that mining and metallurgy on a larger scale in Sweden originated in Bergslagen. The historical mining district Garpenberg in Bergslagen presently show the oldest signs of mining in Sweden (2300 BP) based on a study of a lake sediment profile from Gruvsjön. READ MORE

3. 32. Barium in the O horizon of soils near Sundsvall, northern Sweden : From local minerals or from anthropogenic emissions?

   University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Author : Mattias Åsberg Gencturk; [2023]
   Keywords : Barium; soil; organic horizon;

   Abstract : Concentrations of potentially toxic metals in surface soils are important to investigate before building new residential areas. Prior to development of a residential area in Sundsvall, northern Sweden, it was observed that barium (Ba) concentrations in the soil at the site exceeded the guideline value of 200 mg kg-1 outlined by the Swedish Environmental Protection Agency. READ MORE

4. 33. FOREST LANDSCAPE STRUCTURE OF CAPERCAILLIE (TETRAO UROGALLUS) LEK SITES IN NORTHERN SWEDEN : Analysis of lek site characteristics

   University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Author : Agnes Blomgren; [2023]
   Keywords : capercaillie Tetrao urogallus ; habitat selection; forest landscape structure; lek site;

   Abstract : The purpose of this study is to analyze which variables influence the capercaillie’s (Tetrao urogallus) selection of lek sites in northern Sweden by using remote sensing data. The lek site is a crucial area for the species’ reproductive success. READ MORE

5. 34. Mercury accumulation in lake sediments on different time scales – the influence of algal primary production

   University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Author : Anne Rebotzke; [2023]
   Keywords : mercury; lake sediment; primary productivity; algal scavenging; biogenic silica; diatom proxy; chlorophyll-a; organic matter;

   Abstract : The aim of this work is to test the proposed approach of algal scavenging as a driver of sediment mercury (Hg) on different time scales and to gain a better understanding of the mechanisms of Hg accumulation in lake sediments. A 3000-year sediment record from Nylandssjön in northern Sweden was analysed for this purpose, as well as a 20-year sediment record from the seasonal sediment traps of this lake. READ MORE

6. 35. Aluminum levels in the O-horizon of soils near Sundsvall, Sweden : Are levels of Al elevated due to smelter emission?

   University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Author : Mattias Sundin; [2023]
   Keywords : Aluminium; Smelter emissions; O-horizon; Al concentration; Scots’ pine needles;

   Abstract : Aluminum (Al) is a potentially toxic element for humans, animals, and plants. Al emitted from smelter plants is one source of Al that may be responsible for increased exposure to humans and the environment. READ MORE