Blar i Vitenskapelige artikler på forfatter "Clarke, Nicholas"
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Assessing critical load exceedances and ecosystem impacts of anthropogenic nitrogen and sulphur deposition at unmanaged forested catchments in Europe
Forsius, Martin; Posch, Maximilian; Holmberg, Maria; Vuorenmaa, Jussi; Kleemola, Sirpa; Augustaitis, Algirdas; Beudert, Burkhard; Bochenek, Witold; Clarke, Nicholas; de Wit, Heleen; Dirnböck, Thomas; Frey, Jane; Grandin, Ulf; Hakola, Hannele; Kobler, Johannes; Krám, Pavel; Lindroos, Antti-Jussi; Löfgren, Stefan; Pecka, Tomasz; Rönnback, Pernilla; Skotak, Krzysztof; Szpikowski, Józef; Ukonmaanaho, Liisa; Valinia, Salar; Váňa, Milan (Peer reviewed; Journal article, 2021-01-20)Anthropogenic emissions of nitrogen (N) and sulphur (S) compounds and their long-range transport have caused widespread negative impacts on different ecosystems. Critical loads (CLs) are deposition thresholds used to ... -
Climate change drives substantial decline of understorey species richness and abundance in Norway spruce forests during 32 years of vegetation monitoring
Økland, Tonje; Halvorsen, Rune; Lange, Holger; Nordbakken, Jørn-Frode; Clarke, Nicholas (Peer reviewed; Journal article, 2023-05-31)Questions Observations in permanent forest vegetation plots in Norway and elsewhere indicate that complex changes have taken place over the period 1988–2020. These observations are summarised in the “climate-induced ... -
Climate mitigation and intensified forest management in Norway: To what extent are surface waters safeguarded?
Sundnes, Frode; Karlsson, Marianne; Platjouw, Froukje Maria; Clarke, Nicholas; Kaste, Øyvind; Valinia, Salar (Peer reviewed; Journal article, 2020-09-12)While the role of forestry in mitigating climate change is increasingly subject to political commitment, other areas, such as water protection, may be at risk. In this study, we ask whether surface waters are sufficiently ... -
Conflicting interests of ecosystem services: Multi-criteria modelling and indirect evaluation of trade-offs between monetary and non-monetary measures
Wam, Hilde Karine; Bunnefeld, Nils; Clarke, Nicholas; Hofstad, Ole (Journal article; Peer reviewed, 2016-10-19)Ecosystems provide services for many stakeholder groups, often with a conflict of interests that hampers sustainability. Core to these conflicts is the challenge of trading-off monetary and non-monetary measures. Using the ... -
Contrasting impact of whole-tree-harvesting on chemical quality of plant foliage in coastal versus inland forest
Fjære, Sigmund; Clarke, Nicholas; Nybakken, Line; Wam, Hilde K (Journal article; Peer reviewed, 2016-02-09)Whole-tree-harvesting (WTH) is gaining support as a means to obtain more bioenergy from forests. One aspect that is scarcely addressed is its impact on the chemical quality of post-harvest plant growth, which may initiate ... -
Deep Learning in Hyperspectral Image Reconstruction from Single RGB images—A Case Study on Tomato Quality Parameters
Zhao, Jiangsan; Kechasov, Dmitry; Rewald, Boris; Bodner, Gernot; Verheul, Michel; Clarke, Nicholas; Clarke, Jihong Liu (Peer reviewed; Journal article, 2020-10-07)Hyperspectral imaging has many applications. However, the high device costs and low hyperspectral image resolution are major obstacles limiting its wider application in agriculture and other fields. Hyperspectral image ... -
Effects of intensive biomass harvesting on forest soils in the Nordic countries and the UK: A meta-analysis
Clarke, Nicholas; Kiær, Lars Pødenphant; Kjønaas, O. Janne; Bárcena, Teresa G.; Vesterdal, Lars; Stupak, Inge; Finér, Leena; Jacobson, Staffan; Armolaitis, Kestutis; Lazdina, Dagnija; Stefánsdóttir, Helena Marta; Sigurdsson, Bjarni D. (Peer reviewed; Journal article, 2021-02-15)The use of biomass from forest harvesting residues or stumps for bioenergy has been increasing in the northern European region in the last decade. The present analysis is a regional review from Nordic and UK coniferous ... -
Fertilization of Norway spruce forest with wood ash and nitrogen affected both tree growth and composition of chemical defence
Hanssen, Kjersti Holt; Asplund, Johan; Clarke, Nicholas; Selmer, Ruben; Nybakken, Line (Peer reviewed; Journal article, 2020-10-05)We fertilized a Norway spruce (Picea abies (L.) Karst.) stand on rich mineral soil with 3 t ha−1 of wood ash (ASH), 150 kg ha−1 of nitrogen (N) or a combination of wood ash and nitrogen (ASH + N), in addition to unfertilized ... -
Impact of phosphorus on rhizosphere organic anions of wheat at different growth stages under field conditions
Wang, Yanliang; Krogstad, Tore; Clarke, Nicholas; Øgaard, Anne K. Falk; Clarke, Jihong (Journal article; Peer reviewed, 2017-02-28)Phosphorus (P) is one of the main limiting factors for crop productivity while rhizosphere organic anions have been hypothesized to play an important role in P acquisition. Sampling in a long-term field experiment was ... -
Long-term changes (1990–2015) in the atmospheric deposition and runoff water chemistry of sulphate, inorganic nitrogen and acidity for forested catchments in Europe in relation to changes in emissions and hydrometeorological conditions
Vuorenmaa, Jussi; Augustaitis, Algirdas; Beudert, Burkhard; Bochenek, Witold; Clarke, Nicholas; de Wit, Heleen A; Dirnböck, Thomas; Frey, Jane; Hakola, Hannele; Kleemola, Sirpa; Kobler, Johannes; Krám, Pavel; Lindroos, Antti-Jussi; Lundin, Lars; Löfgren, Stefan; Marchetto, Aldo; Pecka, Tomasz; Schulte-Bisping, Hubert; Skotak, Krzysztof; Srybny, Anatoly; Szpikowski, Józef; Ukonmaanaho, Liisa; Váňa, Milan; Åkerblom, Staffan; Forsius, Martin (Journal article; Peer reviewed, 2018-01-12)The international Long-Term Ecological Research Network (ILTER) encompasses hundreds of long-term research/monitoring sites located in a wide array of ecosystems that can help us understand environmental change across the ... -
Managing sustainability risks of bioenergy in four Nordic countries
Hansen, Anders Chr.; Clarke, Nicholas; Hegnes, Atle Wehn (Peer reviewed; Journal article, 2021-06-07)Background Bioenergy plays a key role in the transition to a sustainable economy in Europe, but its own sustainability is being questioned. We study the experiences of Sweden, Finland, Denmark and Norway, to find out whether ... -
Reviews and syntheses: Greenhouse gas exchange data from drained organic forest soils – a review of current approaches and recommendations for future research
Jauhiainen, Jyrki; Alm, Jukka; Bjarnadottir, Brynhildur; Callesen, Ingeborg; Christiansen, Jesper R; Clarke, Nicholas; Dalsgaard, Lise; He, Hongxing; Jordan, Sabine; Kazanaviciute, Vaiva; Klemedtsson, Leif; Laurén, Ari; Lazdiņš, Andis; Lehtonen, Aleksi; Lohila, Annalea; Lupikis, Ainars; Mander, Ülo; Minkkinen, Kari; Kasimir, Åsa; Olsson, Mats; Ojanen, Paavo; Óskarsson, Hlynur; Sigurdsson, Bjarni D.; Søgaard, Gunnhild; Soosaar, Kaido; Vesterdal, Lars; Laiho, Raija (Journal article; Peer reviewed, 2019-12-10)Drained organic forest soils in boreal and temperate climate zones are believed to be significant sources of the greenhouse gases (GHGs) carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O), but the annual fluxes ... -
Rhizosphere Organic Anions Play a Minor Role in Improving Crop Species' Ability to Take Up Residual Phosphorus (P) in Agricultural Soils Low in P Availability
Wang, Yanliang; Krogstad, Tore; Clarke, Jihong; Hallama, Moritz; Øgaard, Anne K. Falk; Eich-Greatorex, Susanne; Kandeler, Ellen; Clarke, Nicholas (Peer reviewed; Journal article, 2016)Many arable lands have accumulated large reserves of residual phosphorus (P) and a relatively large proportion of soil P is less available for uptake by plants. Root released organic anions are widely documented as a key ... -
Short-term effects of hardened wood ash and nitrogen fertilisation on understory vegetation in a Norway spruce forest in south-east Norway
Økland, Tonje; Nordbakken, Jørn-Frode; Clarke, Nicholas; Hanssen, Kjersti Holt (Peer reviewed; Journal article, 2022-07-26)In a fertiliser experiment in a Norway spruce forest in SE Norway, four treatments were applied in a block design with three replicates per treatment. Treatments included 3 t wood ash ha−1 (Ash), 150 kg nitrogen ha−1 (N), ... -
Short-term effects of whole-tree harvesting on understory plant species diversity and cover in two Norway spruce sites in southern Norway
Økland, Tonje; Nordbakken, Jørn-Frode; Lange, Holger; Røsberg, Ingvald; Clarke, Nicholas (Journal article; Peer reviewed, 2016-04-06)Effects of clear-cut harvesting on ground vegetation plant species diversity and their cover are investigated at two Norway spruce sites in southern Norway, differing in climate and topography. Experimental plots at these ... -
Spatial and Temporal Patterns in Atmospheric Deposition of Dissolved Organic Carbon
Liptzin, Daniel; Boy, Jens; Campbell, John L.; Clarke, Nicholas; Laclau, Jean-Paul; Godoy, Roberto; Johnson, Sherri L.; Kaiser, Klaus; Likens, Gene E.; Karlsson, Gunilla Pihl; Markewitz, Daniel; Rogora, Michela; Sebestyen, Stephen D.; Shanley, James B.; Vanguelova, Elena; Verstraeten, Arne; Wilcke, Wolfgang; Worrall, Fred; McDowell, William H. (Peer reviewed; Journal article, 2022-10-11)Atmospheric deposition of dissolved organic carbon (DOC) to terrestrial ecosystems is a small, but rarely studied component of the global carbon (C) cycle. Emissions of volatile organic compounds (VOC) and organic particulates ... -
Sustainable forest biomass: a review of current residue harvesting guidelines
Titus, Brian D.; Brown, Kevin; Helmisaari, Heljä-Sisko; Vanguelova, Elena; Stupak, Inge; Evans, Alexander; Clarke, Nicholas; Guidi, Claudia; Bruckman, Viktor J.; Varnagiryte-Kabasinskiene, Iveta; Armolaitis, Kestutis; de Vries, Wim; Hirai, Keizo; Kaarakka, Lilli; Hogg, Karen; Reece, Pam (Peer reviewed; Journal article, 2021-04-14)Forest biomass harvesting guidelines help ensure the ecological sustainability of forest residue harvesting for bioenergy and bioproducts, and hence contribute to social license for a growing bioeconomy. Guidelines, typically ... -
Towards a transnational system of supersites for forest monitoring and research in Europe - an overview on present state and future recommendations
Fischer, Richard; Aas, Wenche; De Vries, W.; Clarke, Nicholas; Cudlin, Pavel; Leaver, David; Lundin, Lars; Matteucci, Giorgio; Matyssek, Rainer; Mikkelsen, Teis Nørgaard; Mirtl, Michael; Öztürk, Yasemin; Papale, Dario; Potocic, Nenad; Simpson, David; Tuovinen, Juha Pekka; Vesala, Timo; Wieser, Gerhard; Paoletti, Elena (Peer reviewed; Journal article, 2011-08)Science-based approaches in addressing future risks and challenges for forests require close collaboration among the communities operating different monitoring and research networks as well as experts in process and ...