Search Results - "Espen Lydersen"

Novel terrestrial haul-out behaviour by ringed seals (Pusa hispida) in Svalbard, in association with harbour seals (Phoca vitulina) by Lydersen, Christian, Vaquie-Garcia, Jade, Lydersen, Espen, Christensen, Guttorm N., Kovacs, Kit M.

“…Ringed seals (Pusa hispida) are the most ice-associated of all Arctic pinnipeds. In the Svalbard area, this species has always given birth, moulted and rested…”
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Factors determining parasite abundance in European perch, Perca fluviatilis, European whitefish, Coregonus lavaretus, and Arctic charr, Salvelinus alpinus, in an oligotrophic lake, southern Norway by Olk, Tom Robin, Henriksen, Ann-Cecilie, Dolven, Solveig Irene, Haukø, Mathias Leithe, Lydersen, Espen, Mo, Tor Atle

“…Time and spatial variations in macroparasite status were investigated in European perch, Perca fluviatilis, European whitefish, Coregonus lavaretus, and Arctic…”
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Seasonal variation of mercury and δ15N in fish from Lake Heddalsvatn, southern Norway by Moreno, Clara E., Fjeld, Eirik, Deshar, Min K., Lydersen, Espen

“…Seasonal variations of mercury (Hg) concentration in muscle tissue of northern pike - Esox lucius L, European whitefish - Coregonus lavaretus L and European…”
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Seasonal Variations in the Use of Profundal Habitat among Freshwater Fishes in Lake Norsjø, Southern Norway, and Subsequent Effects on Fish Mercury Concentrations by Tom Robin Olk, Tobias Karlsson, Espen Lydersen, Asle Økelsrud

“…This study is based on monthly sampling of fish from grates mounted at an industrial water intake, located at a depth of 50 m in Lake Norsjø (Southern Norway)…”
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Acid deposition and its effects in China: an overview by Larssen, Thorjørn, Seip, Hans Martin, Semb, Arne, Mulder, Jan, Muniz, Ivar P., Vogt, Rolf D., Lydersen, Espen, Angell, Valter, Dagang, Tang, Eilertsen, Odd

“…Acid rain is an increasing environmental problem in China. At present SO 2 emission is about 20–22 million tons. However with a growing number of large power…”
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Fifty years of freshwater monitoring in Sweden by 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 by Olsen, Marianne, Fjeld, Eirik, Lydersen, Espen

“…There are contradicting results on the importance of legacy mercury (Hg) contaminated sediments to Hg fish tissue concentrations. Still, sediment remediation…”
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Biomagnification of mercury and selenium in two lakes in southern Norway by Økelsrud, Asle, Lydersen, Espen, Fjeld, Eirik

“…We have investigated bioaccumulation and trophic transfer of both mercury (Hg) and selenium (Se) in two lakes in southern Norway to reveal a suggested…”
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Mercury and selenium in free-ranging brown trout (Salmo trutta) in the River Skienselva watercourse, Southern Norway by Økelsrud, Asle, Lydersen, Espen, Moreno, Clara, Fjeld, Eirik

“…Selenium (Se), mercury (Hg), and stable isotopes of nitrogen (δ15N) and carbon (δ13C) have been investigated in free-ranging brown trout (Salmo trutta) from…”
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Environmental factors influencing mercury speciation in Subarctic and Boreal lakes by Braaten, Hans Fredrik V., de Wit, Heleen A., Fjeld, Eirik, Rognerud, Sigurd, Lydersen, Espen, Larssen, Thorjørn

“…Environmental drivers of total mercury (TotHg) concentrations, methylmercury (MeHg) concentrations, and MeHg fractions (a proxy for methylation potential,…”
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The influence of permanently submerged macrophytes on sediment mercury distribution, mobility and methylation potential in a brackish Norwegian fjord by Olsen, Marianne, Schaanning, Morten Thorne, Braaten, Hans Fredrik Veiteberg, Eek, Espen, Moy, Frithjof E., Lydersen, Espen

“…Macrophytes are shown to affect the microbial activity in different aqueous environments, with an altering of the sediment cycling of mercury (Hg) as a…”
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effects of wildfire on mercury and stable isotopes (δ15N, δ13C) in water and biota of small boreal, acidic lakes in southern Norway by Moreno, Clara E, Fjeld, Eirik, Lydersen, Espen

“…Effects of wildfire on main water chemistry and mercury (Hg) in water and biota were studied during the first 4 post-fire years. After severe water chemical…”
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Brood‐stock management and early hatchery rearing of Arctic charr (Salvelinus alpinus (Linnaeus)) by Olk, Tom Robin, Jeuthe, Henrik, Thorarensen, Helgi, Wollebæk, Jens, Lydersen, Espen

“…Arctic charr (Salvelinus alpinus (Linnaeus)) is a stenothermic cold‐water fish, which has been cultured in Northern Europe and North America since the 1980s…”
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An In Situ Experimental Study of Effects on Submerged Vegetation After Activated Carbon Amendment of Legacy Contaminated Sediments by Olsen, Marianne, Moy, Frithjof E., Mjelde, Marit, Lydersen, Espen

“…Activated carbon (AC) amendment has been shown to reduce bioavailability of hydrophobic contaminants in the bioactive layer of sediment. Unwanted secondary…”
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Improved Environmental Status: 50 Years of Declining Fish Mercury Levels in Boreal and Subarctic Fennoscandia by Braaten, Hans Fredrik Veiteberg, Åkerblom, Staffan, Kahilainen, Kimmo K, Rask, Martti, Vuorenmaa, Jussi, Mannio, Jaakko, Malinen, Tommi, Lydersen, Espen, Poste, Amanda E, Amundsen, Per-Arne, Kashulin, Nicholas, Kashulina, Tatiana, Terentyev, Petr, Christensen, Guttorm, de Wit, Heleen A

“…Temporally (1965–2015) and spatially (55°–70°N) extensive records of total mercury (Hg) in freshwater fish showed consistent declines in boreal and subarctic…”
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The effects of wildfire on mercury and stable isotopes (δ(15)N, δ(13)C) in water and biota of small boreal, acidic lakes in southern Norway by Moreno, Clara E, Fjeld, Eirik, Lydersen, Espen

“…Effects of wildfire on main water chemistry and mercury (Hg) in water and biota were studied during the first 4 post-fire years. After severe water chemical…”
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Acid Rain in China by Larssen, Thorjorn, Lydersen, Espen, Tang, Dagang, He, Yi, Gao, Jixi, Liu, Haiying, Duan, Lei, Seip, Hans M, Vogt, Rolf D, Mulder, Jan, Shao, Min, Wang, Yanhui, Shang, He, Zhang, Xiaoshan, Solberg, Svein, Aas, Wenche, Okland, Tonje, Eilertsen, Odd, Angell, Valter, Li, Quanru, Zhao, Dawei, Xiang, Renjun, Xiao, Jinshong, Luo, Jiahai

“…Acid rain emerged as an important environmental problem in China in the late 1970s. The current situation and what to expect in the future, based largely on…”
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Molecular responses to toxicological stressors: Profiling microRNAs in wild Atlantic salmon (Salmo salar) exposed to acidic aluminum-rich water by Kure, Elin H., Sæbø, Mona, Stangeland, Astrid M., Hamfjord, Julian, Hytterød, Sigurd, Heggenes, Jan, Lydersen, Espen

“…•Young Atlantic salmon (Salmo salar) were exposed for 3 days to acidic water (pH≈5.6) with inorganic aluminum (100μgL−1).•Besides loss of plasma ions and…”
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The effects of ionic strength on the toxicity of aluminium to Atlantic salmon (Salmo salar) under non-steady state chemical conditions by LYDERSEN, Espen, ØXNEVAD, Sigurd, ØSTBYE, Kjartan, ANDERSEN, Ronny A., BJERKELY, Frode, VØLLESTAD, Leif Asbjørn, POLÉO, Antonio B.S.

“…We have tested the influence of water ionic strength on the toxicity of aluminium in fish by comparing the mortality of Atlantic salmon (Salmo salar) parr…”
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Seasonal variation in mortality of brown trout (Salmo trutta) in an acidic aluminium-rich lake by LYDERSEN, Espen, RUKKE, Nina W.A., JENSEN, Jannike G.B., KJELSBERG, Birgitte M., TORNSJØ, Bente, VOGT, Rolf D., VØLLESTAD, Asbjørn L., POLÉO, Antonio B.S.

“…We have studied the seasonal variation in aluminium toxicity in caged brown trout (Salmo trutta), during one year (October 1994 to September 1995) in a small…”
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