Blar i USN Open Archive på forfatter "Lydersen, Espen"
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The influence of a submerged meadow on uptake and trophic transfer of legacy mercury from contaminated sediment in the food web in a brackish Norwegian fjord
Olsen, Marianne; Fjeld, Eirik; Lydersen, Espen (Journal article; Peer reviewed, 2019)There are contradicting results on the importance of legacy mercury (Hg) contaminated sediments to Hg fish tissue concentrations. Still, sediment remediation actions often aim at minimizing ecosystem exposure and human ... -
The influence of permanently submerged macrophytes on sediment mercury distribution, mobility and methylation potential in a brackish Norwegian fjord
Olsen, Marianne; Schaanning, Morten; Braaten, Hans Fredrik Veiteberg; Eek, Espen; Moy, Frithjof Emil; Lydersen, Espen (Journal article; Peer reviewed, 2018)Macrophytes are shown to affect the microbial activity in different aqueous environments, with an altering of the sediment cycling of mercury (Hg) as a potential effect. Here, we investigated how a meadow with permanently ... -
Tilførsler av næringsstoffer, metaller og andre miljøgifter til Grenlandsfjordene 2008
Lydersen, Espen; Trasti, Anne; Sageie, Jostein (HiT skrift, Research report, 2010-10-29)Hovedhensikten med denne rapporten har vært å oppdatere tilførselsberegningene av næringsstoffer, metaller og andre miljøgifter til grenlandsfjordene. Hovedfokus har vært på utslipp i 2008, og er derfor en oppdatering av ... -
Variation in macro parasites within and between three fish species in Lake Norsjø, southern Norway
Haukø, Mathias Leithe (Master thesis, 2021)I innsjøer som huser flere fiskearter er interspesifikk konkurranse blant fisk en kjent driver for bruk av habitat og fødevalg blant de ulike fiskeartene. Fødevalg og habitatbruk kan også se ut til å påvirke variasjon i ... -
Variations in macrochemistry, nutrients and heavy metals during hydrological events in a small Norwegian stream
Dahal, Nitish (Master thesis, 2020)This investigation has emphasized on transport of particles and nutrients during different hydrological events in a water course in Southern Norway, primarily draining agricultural areas. Two streams, Borjaevju and Prestevju, ... -
Water chemistry, zooplankton and benthos in small lakes within the distribution area of the rare European pool frog Pelophylax lessonae (Camerano) in Norway
Lydersen, Espen; Holtan, Marijanne; Korslund, Lars; Raddum, Gunnar; Dolmen, Dag; Wærvågen, Svein Birger; Fjeld, Eirik (Peer reviewed; Journal article, 2020)In June 2018, water chemistry, benthos and zooplankton were investigated in 7 small lakes/ponds within the key area of the European pool frog Pelophylax lessonae (Camerano) in Norway. The geographic distribution of the ...