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Wamelink GWW, Goedhart PW, Roelofsen HD, Bobbink R, Posch M, van Dobben HF, Biurrun I, Bonari G, Dengler J, Dítě D, Garbolino E, Jansen J, Jašková AK, Lenoir J, Peterka T. A novel method to estimate the response of habitat types to nitrogen deposition. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 349:123844. [PMID: 38580065 DOI: 10.1016/j.envpol.2024.123844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 03/20/2024] [Accepted: 03/21/2024] [Indexed: 04/07/2024]
Abstract
Increasing nitrogen depositions adversely affect European landscapes, including habitats within the Natura2000 network. Critical loads for nitrogen deposition have been established to quantify the loss of habitat quality. When the nitrogen deposition rises above a habitat-specific critical load, the quality of the focal habitat is expected to be negatively influenced. Here, we investigate how the quality of habitat types is affected beyond the critical load. We calculated response curves for 60 terrestrial habitat types in the Netherlands to the estimated nitrogen deposition (EMEP-data). The curves for habitat types are based on the occurrence of their characteristic plant species in North-Western Europe (plot data from the European Vegetation Archive). The estimated response curves were corrected for soil type, mean annual temperature and annual precipitation. Evaluation was carried out by expert judgement, and by comparison with gradient deposition field studies. For 39 habitats the response to nitrogen deposition was judged to be reliable by five experts, while out of the 41 habitat types for which field studies were available, 25 showed a good agreement. Some of the curves showed a steep decline in quality and some a more gradual decline with increasing nitrogen deposition. We compared the response curves with both the empirical and modelled critical loads. For 41 curves, we found a decline already starting below the critical load.
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Affiliation(s)
- G W W Wamelink
- Wageningen Environmental Research, Wageningen University & Research, Wageningen, the Netherlands.
| | - P W Goedhart
- Biometris, Wageningen University & Research, Wageningen, the Netherlands
| | - H D Roelofsen
- Wageningen Environmental Research, Wageningen University & Research, Wageningen, the Netherlands
| | - R Bobbink
- B-WARE Research Centre, Radboud University, Nijmegen, the Netherlands
| | - M Posch
- International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria
| | - H F van Dobben
- Wageningen Environmental Research, Wageningen University & Research, Wageningen, the Netherlands
| | - I Biurrun
- Department of Plant Biology and Ecology, University of the Basque Country UPV/EHU, Bilbao, Spain
| | - G Bonari
- University of Siena, Siena, Italy
| | - J Dengler
- Vegetation Ecology Research Group, Institute for Natural Resource Management (IUNR), Zurich University of Applied Sciences (ZHAW), Wädenswil, Switzerland; Bayreuth Center for Ecology and Environmental Research (BayCEER), University of Bayreuth, Bayreuth, Germany
| | - D Dítě
- Slovak Academy of Sciences, Bratislava, Slovakia
| | | | - J Jansen
- Radboud University, Nijmegen, the Netherlands
| | - A K Jašková
- Department of Botany and Zoology, Faculty of Science, Masaryk Univerzity, Brno, Czech Republic
| | - J Lenoir
- UMR CNRS, "Ecologie et Dynamique des Systèmes Anthropisés" (EDYSAN), Université de Picardie Jules Verne, 7058, Amiens, France
| | - T Peterka
- Department of Botany and Zoology, Faculty of Science, Masaryk Univerzity, Brno, Czech Republic
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2
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Chai Y, Hu Y. Characteristics and drivers of vegetation productivity sensitivity to increasing CO 2 at Northern Middle and High Latitudes. Ecol Evol 2024; 14:e11467. [PMID: 38799397 PMCID: PMC11116762 DOI: 10.1002/ece3.11467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 05/01/2024] [Accepted: 05/08/2024] [Indexed: 05/29/2024] Open
Abstract
Understanding and accurately predicting how the sensitivity of terrestrial vegetation productivity to rising atmospheric CO2 concentration (β) is crucial for assessing carbon sink dynamics. However, the temporal characteristics and driving mechanisms of β remain uncertain. Here, observational and CMIP6 modeling evidence suggest a decreasing trend in β at the Northern Middle and High Latitudes during the historical period of 1982-2015 (-0.082 ± 0.005% 100 ppm-1 year-1). This decreasing trend is projected to persist until the end of the 21st century (-0.082 ± 0.005% 100 ppm-1 year-1 under SSP370 and -0.166 ± 0.006% 100 ppm-1 year-1 under SSP585). The declining β indicates a weakening capacity of vegetation to mitigate warming climates, posing challenges for achieving the temperature goals of the Paris Agreement. The rise in vapor pressure deficit (VPD), that triggers stomata closure and weakens photosynthesis, is considered as the dominated factor contributing to the historical and future decline in β, accounting for 62.3%-75.2% of the effect. Nutrient availability and water availability contribute 15.7%-21.4% and 8.5%-16.3%, respectively. These findings underscore the significant role of VPD in shaping terrestrial carbon sink dynamics, an aspect that is currently insufficiently considered in many climate and ecological models.
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Affiliation(s)
- Yuanfang Chai
- State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical ScienceBeijing Normal UniversityBeijingChina
| | - Yong Hu
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth EnvironmentChinese Academy of SciencesXi'anChina
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3
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Zhou Y, Chang S, Huang X, Wang W, Hou F, Wang Y, Nan Z. Assembly of typical steppe community and functional groups along the precipitation gradient from 1985 to 2022. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167545. [PMID: 37793455 DOI: 10.1016/j.scitotenv.2023.167545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 09/27/2023] [Accepted: 09/30/2023] [Indexed: 10/06/2023]
Abstract
Long-term observations have shown that structure and function of grasslands have changed due to climate change over the past decades. However, little is known about how grasslands respond to climate change along the precipitation gradient, and potential mechanisms remain elusive. Here, we utilize a long-term experiment in typical steppe to explore universal and differential mechanisms of community and functional groups assembly along the precipitation gradient. Our results indicated that the sensitivity of community and functional groups assembly to climate change was related to local precipitation. The strength of the positive effects of climate change on aboveground biomass, species richness, and their relationship of community decreased modestly with local precipitation. The mechanism behind this was the change in plant community composition of the precipitation-induced, annuals that was more responsive to climate change decreased as increased local precipitation. Furthermore, current and past climate both drove community and functional group assembly, and the role of past climate diminished with increasing local precipitation. Among them, climate fluctuation, average climate and current climate were the most critical climate indicators affecting community and functional groups assembly in low, medium and high precipitation sites, respectively. In conclusion, climatic change do not always exert identical effects on grasslands along the precipitation gradient. This could be critical importance for improving our ability to predict future changes in grassland ecosystems.
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Affiliation(s)
- Yi Zhou
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China; Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, Lanzhou University, Lanzhou 730020, China
| | - Shenghua Chang
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China; Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, Lanzhou University, Lanzhou 730020, China
| | - Xiaojuan Huang
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China; Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, Lanzhou University, Lanzhou 730020, China
| | - Wenjun Wang
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China; Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, Lanzhou University, Lanzhou 730020, China
| | - Fujiang Hou
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China; Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, Lanzhou University, Lanzhou 730020, China.
| | - Yanrong Wang
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China; Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, Lanzhou University, Lanzhou 730020, China
| | - Zhibiao Nan
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China; Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, Lanzhou University, Lanzhou 730020, China
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De Marco A, Sicard P, Feng Z, Agathokleous E, Alonso R, Araminiene V, Augustatis A, Badea O, Beasley JC, Branquinho C, Bruckman VJ, Collalti A, David‐Schwartz R, Domingos M, Du E, Garcia Gomez H, Hashimoto S, Hoshika Y, Jakovljevic T, McNulty S, Oksanen E, Omidi Khaniabadi Y, Prescher A, Saitanis CJ, Sase H, Schmitz A, Voigt G, Watanabe M, Wood MD, Kozlov MV, Paoletti E. Strategic roadmap to assess forest vulnerability under air pollution and climate change. GLOBAL CHANGE BIOLOGY 2022; 28:5062-5085. [PMID: 35642454 PMCID: PMC9541114 DOI: 10.1111/gcb.16278] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 03/02/2022] [Accepted: 05/18/2022] [Indexed: 05/13/2023]
Abstract
Although it is an integral part of global change, most of the research addressing the effects of climate change on forests have overlooked the role of environmental pollution. Similarly, most studies investigating the effects of air pollutants on forests have generally neglected the impacts of climate change. We review the current knowledge on combined air pollution and climate change effects on global forest ecosystems and identify several key research priorities as a roadmap for the future. Specifically, we recommend (1) the establishment of much denser array of monitoring sites, particularly in the South Hemisphere; (2) further integration of ground and satellite monitoring; (3) generation of flux-based standards and critical levels taking into account the sensitivity of dominant forest tree species; (4) long-term monitoring of N, S, P cycles and base cations deposition together at global scale; (5) intensification of experimental studies, addressing the combined effects of different abiotic factors on forests by assuring a better representation of taxonomic and functional diversity across the ~73,000 tree species on Earth; (6) more experimental focus on phenomics and genomics; (7) improved knowledge on key processes regulating the dynamics of radionuclides in forest systems; and (8) development of models integrating air pollution and climate change data from long-term monitoring programs.
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Affiliation(s)
| | | | - Zhaozhong Feng
- Key Laboratory of Agro‐Meteorology of Jiangsu Province, School of Applied MeteorologyNanjing University of Information Science & TechnologyNanjingChina
| | - Evgenios Agathokleous
- Key Laboratory of Agro‐Meteorology of Jiangsu Province, School of Applied MeteorologyNanjing University of Information Science & TechnologyNanjingChina
| | - Rocio Alonso
- Ecotoxicology of Air Pollution, CIEMATMadridSpain
| | - Valda Araminiene
- Lithuanian Research Centre for Agriculture and ForestryKaunasLithuania
| | - Algirdas Augustatis
- Faculty of Forest Sciences and EcologyVytautas Magnus UniversityKaunasLithuania
| | - Ovidiu Badea
- “Marin Drăcea” National Institute for Research and Development in ForestryVoluntariRomania
- Faculty of Silviculture and Forest Engineering“Transilvania” UniversityBraşovRomania
| | - James C. Beasley
- Savannah River Ecology Laboratory and Warnell School of Forestry and Natural ResourcesUniversity of GeorgiaAikenSouth CarolinaUSA
| | - Cristina Branquinho
- Centre for Ecology, Evolution and Environmental Changes, Faculdade de CiênciasUniversidade de LisboaLisbonPortugal
| | - Viktor J. Bruckman
- Commission for Interdisciplinary Ecological StudiesAustrian Academy of SciencesViennaAustria
| | | | | | - Marisa Domingos
- Instituto de BotanicaNucleo de Pesquisa em EcologiaSao PauloBrazil
| | - Enzai Du
- Faculty of Geographical ScienceBeijing Normal UniversityBeijingChina
| | | | - Shoji Hashimoto
- Department of Forest SoilsForestry and Forest Products Research InstituteTsukubaJapan
| | | | | | | | - Elina Oksanen
- Department of Environmental and Biological SciencesUniversity of Eastern FinlandJoensuuFinland
| | - Yusef Omidi Khaniabadi
- Department of Environmental Health EngineeringIndustrial Medial and Health, Petroleum Industry Health Organization (PIHO)AhvazIran
| | | | - Costas J. Saitanis
- Lab of Ecology and Environmental ScienceAgricultural University of AthensAthensGreece
| | - Hiroyuki Sase
- Ecological Impact Research DepartmentAsia Center for Air Pollution Research (ACAP)NiigataJapan
| | - Andreas Schmitz
- State Agency for Nature, Environment and Consumer Protection of North Rhine‐WestphaliaRecklinghausenGermany
| | | | - Makoto Watanabe
- Institute of AgricultureTokyo University of Agriculture and Technology (TUAT)FuchuJapan
| | - Michael D. Wood
- School of Science, Engineering and EnvironmentUniversity of SalfordSalfordUK
| | | | - Elena Paoletti
- Department of Forest SoilsForestry and Forest Products Research InstituteTsukubaJapan
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5
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McDonnell T, Clark C, Reinds G, Sullivan T, Knees B. Modeled Vegetation Community Trajectories: Effects from Climate Change, Atmospheric Nitrogen Deposition, and Soil Acidification Recovery. ENVIRONMENTAL ADVANCES 2022; 9:1-13. [PMID: 36969089 PMCID: PMC10031515 DOI: 10.1016/j.envadv.2022.100271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Forest understory plant communities in the United States harbor most of the vegetation diversity of forests and are often sensitive to changes in climate and atmospheric deposition of nitrogen (N). As temperature increases from human-caused climate change and soils recover from long term atmospheric deposition of N and sulfur (S), it is unclear how these important ecosystem components will respond. We used the newly developed US-PROPS model - based on species response functions for over 1,500 species - to evaluate the potential impacts of atmospheric N deposition and climate change on species occurrence probability for a case study in the forested ecosystems of the Great Smoky Mountains National Park (GRSM), an iconic park in the southeastern United States. We evaluated six future scenarios from various combinations of two potential recoveries of soil pH (no change, +0.5 pH units) and three climate futures (no change, +1.5, +3.0 deg C). Species critical loads (CLs) of N deposition and projected responses for each scenario were determined. Critical loads were estimated to be low (< 2 kg N/ha/yr) to protect all species under current and expected future conditions across broad regions of GRSM and these CLs were exceeded at large spatial extents among scenarios. Northern hardwood, yellow pine, and chestnut oak forests were among the most N-sensitive vegetation map classes found within GRSM. Potential future air temperature conditions generally led to decreases in the maximum occurrence probability for species. Therefore, CLs were considered "unattainable" in these situations because the specified level of protection used for CL determination (i.e., maximum occurrence probability under ambient conditions) was not attainable. Although some species showed decreases in maximum occurrence probability with simulated increases in soil pH, most species were favored by increased pH. The importance of our study is rooted in the methodology described here for establishing regional CLs and for evaluating future conditions, which is transferable to other national parks in the U.S. and in Europe where the original PROPS model was developed.
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Affiliation(s)
- T.C. McDonnell
- E&S Environmental Chemistry, Inc., PO Box 609, Corvallis, OR 97339
| | - C.M. Clark
- US EPA, Office of Research and Development, National Center for Environmental Assessment, Washington DC, 20460, USA
| | - G.J. Reinds
- Wageningen University and Research, Environmental Research (Alterra), P.O. Box 47, 6700 AA, Wageningen, The Netherlands
| | - T.J. Sullivan
- E&S Environmental Chemistry, Inc., PO Box 609, Corvallis, OR 97339
| | - B. Knees
- E&S Environmental Chemistry, Inc., PO Box 609, Corvallis, OR 97339
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6
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Lu P, Hao T, Li X, Wang H, Zhai X, Tian Q, Bai W, Stevens C, Zhang W. Ambient nitrogen deposition drives plant‐diversity decline by nitrogen accumulation in a closed grassland ecosystem. J Appl Ecol 2021. [DOI: 10.1111/1365-2664.13858] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Peng Lu
- State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Beijing China
| | - Tianxiang Hao
- College of Resources and Environmental Sciences Key Laboratory of Plant–Soil Interactions of the Ministry of Education China Agricultural University Beijing China
| | - Xin Li
- State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Beijing China
- College of Resource and Environment University of Chinese Academy of Sciences Beijing China
| | - Hong Wang
- Mountain Area Research Institute Agricultural University of Hebei Baoding China
| | - Xiufeng Zhai
- State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Beijing China
- College of Resource and Environment University of Chinese Academy of Sciences Beijing China
| | - Qiuying Tian
- State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Beijing China
| | - Wenming Bai
- State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Beijing China
| | - Carly Stevens
- Lancaster Environment Centre Lancaster University Lancaster UK
| | - Wen‐Hao Zhang
- State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Beijing China
- College of Resource and Environment University of Chinese Academy of Sciences Beijing China
- Inner Mongolia Research Center for Prataculture Chinese Academy of Sciences Beijing China
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7
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Forsius M, Posch M, Holmberg M, Vuorenmaa J, Kleemola S, Augustaitis A, Beudert B, Bochenek W, Clarke N, de Wit HA, Dirnböck T, Frey J, Grandin U, Hakola H, Kobler J, Krám P, Lindroos AJ, Löfgren S, Pecka T, Rönnback P, Skotak K, Szpikowski J, Ukonmaanaho L, Valinia S, Váňa M. Assessing critical load exceedances and ecosystem impacts of anthropogenic nitrogen and sulphur deposition at unmanaged forested catchments in Europe. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 753:141791. [PMID: 32890870 DOI: 10.1016/j.scitotenv.2020.141791] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 08/13/2020] [Accepted: 08/17/2020] [Indexed: 06/11/2023]
Abstract
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 describe the sensitivity of ecosystems to atmospheric deposition. The CL methodology has been a key science-based tool for assessing the environmental consequences of air pollution. We computed CLs for eutrophication and acidification using a European long-term dataset of intensively studied forested ecosystem sites (n = 17) in northern and central Europe. The sites belong to the ICP IM and eLTER networks. The link between the site-specific calculations and time-series of CL exceedances and measured site data was evaluated using long-term measurements (1990-2017) for bulk deposition, throughfall and runoff water chemistry. Novel techniques for presenting exceedances of CLs and their temporal development were also developed. Concentrations and fluxes of sulphate, total inorganic nitrogen (TIN) and acidity in deposition substantially decreased at the sites. Decreases in S deposition resulted in statistically significant decreased concentrations and fluxes of sulphate in runoff and decreasing trends of TIN in runoff were more common than increasing trends. The temporal developments of the exceedance of the CLs indicated the more effective reductions of S deposition compared to N at the sites. There was a relation between calculated exceedance of the CLs and measured runoff water concentrations and fluxes, and most sites with higher CL exceedances showed larger decreases in both TIN and H+ concentrations and fluxes. Sites with higher cumulative exceedance of eutrophication CLs (averaged over 3 and 30 years) generally showed higher TIN concentrations in runoff. The results provided evidence on the link between CL exceedances and empirical impacts, increasing confidence in the methodology used for the European-scale CL calculations. The results also confirm that emission abatement actions are having their intended effects on CL exceedances and ecosystem impacts.
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Affiliation(s)
- Martin Forsius
- Finnish Environment Institute (SYKE), Latokartanonkaari 11, FI-00790 Helsinki, Finland.
| | - Maximilian Posch
- International Institute for Applied Systems Analysis (IIASA), A-2361 Laxenburg, Austria
| | - Maria Holmberg
- Finnish Environment Institute (SYKE), Latokartanonkaari 11, FI-00790 Helsinki, Finland
| | - Jussi Vuorenmaa
- Finnish Environment Institute (SYKE), Latokartanonkaari 11, FI-00790 Helsinki, Finland
| | - Sirpa Kleemola
- Finnish Environment Institute (SYKE), Latokartanonkaari 11, FI-00790 Helsinki, Finland
| | - Algirdas Augustaitis
- Forest Monitoring Laboratory, Vytautas Magnus University, Studentu 13, Kaunas distr. LT-53362, Lithuania
| | - Burkhard Beudert
- Bavarian Forest National Park, Freyunger Str. 2, D-94481 Grafenau, Germany
| | - Witold Bochenek
- Institute of Geography and Spatial Organization, Polish Academy of Sciences, Szymbark 430, 38-311 Szymbark, Poland
| | - Nicholas Clarke
- Norwegian Institute of Bioeconomy Research, PO Box 115, NO-1431 Ås, Norway
| | - Heleen A de Wit
- Norwegian Institute for Water Research, Gaustadalléen 21, NO-0349 Oslo, Norway
| | - Thomas Dirnböck
- Environment Agency Austria, Department for Ecosystem Research and Data Information Management, Spittelauer Lände 5, A-1090 Vienna, Austria
| | - Jane Frey
- Tartu University, Institute of Ecology and Earth Sciences, Vanemuise St. 46, EE-51014 Tartu, Estonia
| | - Ulf Grandin
- Swedish University of Agricultural Sciences, PO Box 7050, SE-75007 Uppsala, Sweden
| | - Hannele Hakola
- Finnish Meteorological Institute, PO Box 503, FI-00101 Helsinki, Finland
| | - Johannes Kobler
- Environment Agency Austria, Department for Ecosystem Research and Data Information Management, Spittelauer Lände 5, A-1090 Vienna, Austria
| | - Pavel Krám
- Czech Geological Survey, Department of Geochemistry, Klárov 3, CZ-118 21 Prague 1, Czech Republic
| | - Antti-Jussi Lindroos
- Natural Resources Institute Finland (Luke), Latokartanonkaari 9, FI-00790 Helsinki, Finland
| | - Stefan Löfgren
- Swedish University of Agricultural Sciences, PO Box 7050, SE-75007 Uppsala, Sweden
| | - Tomasz Pecka
- Institute of Environmental Protection - National Research Institute, ul. Kolektorska 4, 01-692 Warsaw, Poland
| | - Pernilla Rönnback
- Swedish University of Agricultural Sciences, PO Box 7050, SE-75007 Uppsala, Sweden
| | - Krzysztof Skotak
- Institute of Environmental Protection - National Research Institute, ul. Kolektorska 4, 01-692 Warsaw, Poland
| | - Józef Szpikowski
- Adam Mickiewicz University in Poznan, Storkowo 32, 78-450 Grzmiąca, Poland
| | - Liisa Ukonmaanaho
- Natural Resources Institute Finland (Luke), Latokartanonkaari 9, FI-00790 Helsinki, Finland
| | - Salar Valinia
- Swedish Environmental Protection Agency, Climate Department- Air Unit, SE-106 48 Stockholm, Sweden
| | - Milan Váňa
- Czech Hydrometeorological Institute, Observatory Košetice, CZ-394 22 Košetice, Czech Republic
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