Blar i NIVA Open Access Archive på forfatter "de Wit, Heleen - Project manager"
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Biodiversity of macro-invertebrates in acid-sensitive waters: trends and relations to water chemistry and climate. ICP Waters report 127/2016
Velle, Gaute; Mahlum, Shad; Monteith, Don T.; de Wit, Heleen; Arle, Jens; Eriksson, Lars; Fjellheim, Arne; Frolova, Marina; Fölster, Jens; Grudule, Natalja; Halvorsen, Godtfred A.; Hildrew, Alan; Hruška, Jakub; Indriksone, Iveta; Kamasová, Lenka; Kopáček, Jiří; Krám, Pavel; Orton, Stuart; Senoo, Takaaki; Shilland, Ewan M.; Stuchlík, Evžen; Telford, Richard J.; Ungermanová, Lenka; Wiklund, Magda-Lena; Wright, Richard F. (NIVA-rapport;7077, Research report, 2016-09)This is a study of the international impact of acid emission reductions on vulnerable freshwater biodiversity of benthic macroinvertebrates. In order to properly attribute impacts it is necessary to also incorporate the ... -
Biological intercalibration. Invertebrates 1915 - ICP Waters report 124/2015
Fjellheim, Arne; Johannessen, Arne; Landås, Torunn Svanevik (NIVA-rapport;6940, Research report, 2015)Six European laboratories participated in the 19th ICP Waters biological intercalibration, which took place in 2015. The laboratories identified a very high portion of the individuals in the test samples, > 95% of the total ... -
Biological intercalibration: Invertebrates 1713 (ICP Waters report 118/2014)
Fjellheim, Arne; Johannessen, Arne; Landås, Torunn Svanevik; de Wit, Heleen (NIVA-rapport;6662, Research report, 2014-04)The 17th intercalibration of invertebrates in the ICP Waters programme had contribution from four laboratories. The laboratories identified a very high portion of the individuals in the test samples, usually > 95% of the ... -
Biological intercalibration: Invertebrates 2016. ICP Waters report 130/2016
Halvorsen, Godtfred Anker; Johannessen, Arne; Landås, Torunn Svanevik (NIVA-rapport;7089, Research report, 2016-11)Two European laboratories participated in the 20th ICP Waters biological intercalibration, which took place in 2016. The laboratories identified a high proportion of the individuals in the test samples, 93 % of the total ... -
Chemical and biological recovery in acid-sensitive waters: trends and prognosis (ICP Waters report 119/2015)
Garmo, Øyvind Aaberg; de Wit, Heleen; Fjellheim, A (NIVA-rapport;6847, Research report, 2015)We present a trend analysis of surface water chemistry in in acid-sensitive lakes and rivers in Europe and North America, for the period 2000 to 2011, combined with a prognosis for water chemistry in Europe in 2020. Also, ... -
Proceedings of the 29th Task Force meeting of the ICP Waters Programme in Český Krumlov, Czech Republic 1st –3rd October, 2013 (ICP Waters report 117/2014)
de Wit, Heleen; Wathne, Bente Margrethe; Hruska, Jakub (NIVA-rapport; 6643, Research report, 2014-03)The report contains Proceedings of the 29th Task Force meeting of the ICP Waters Programme in Český Krumlov, Czech Republic, October 1 – 3, 2013, including national contributions from Armenia, Canada, the Czech Republic, ... -
Proceedings of the 31st Task Force meeting of the ICP Waters Programme in Monte Verità, Switzerland, October 6-8, 2015. ICP Waters report 126/2016
Valinia, Salar; Steingruber, Sandra; de Wit, Heleen - Project manager (NIVA-rapport;7003, Research report, 2016)Proceedings of the 31st Task Force meeting of the ICP Waters Programme in Monte Verità, Norway, October 6 – 8, 2015. National contributions from Russia, Italy, Switzerland, Finland, Canada, Sweden, and Norway. -
Proceedings of the 32nd Task Force meeting of the ICP Waters Programme in Asker, Oslo, May 24-26, 2016. ICP Waters report 128/2016
Valinia, Salar; de Wit, Heleen; de Wit, Heleen - Project manager (NIVA-rapport;7090, Research report, 2016-11)Proceedings of the 32nd Task Force meeting of the ICP Waters Programme in Asker, Norway, May 24-26, 2016. National contributions from Russia and Norway. -
Spatial and temporal trends of mercury in freshwater fish in Fennoscandia (1965-2015)
Braaten, Hans Fredrik Veiteberg; Åkerblom, Staffan; de Wit, Heleen; Skotte, Gunnar; Rask, Martti; Vuorenmaa, Jussi; Kahilainen, Kimmo K.; Malinen, Tommi; Rognerud, Sigurd; Lydersen, Espen; Amundsen, Per-Arne; Kashulin, Nicholas; Kashulina, Tatiana; Terentyev, Petr; Christensen, Guttorm; Jackson-Blake, Leah Amber; Lund, Espen; Rosseland, Bjørn Olav (NIVA-rapport;7179, Research report, 2017-09)Mercury (Hg) emissions to the atmosphere cause elevated Hg levels in fish, even in many remote regions of the world. Here we present an extensive database of more than 50 000 measurements of Hg in fish, including 2 775 ... -
Trends in ecosystem and health responses to long-rangetransported atmospheric pollutants - ICP Waters report125/2015
de Wit, Heleen; Hettelingh, Jean-Paul; Harmens, Harry (NIVA-rapport;6946, Research report, 2015)The aim of this trend report is to assess the effectiveness of air pollution policies under the Convention on Long-range Transboundary Air Pollution (LRTAP), and to document progress and identify remaining challenges. ...