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  • 1
    Language: English
    In: Environmental Monitoring and Assessment, 2011, Vol.174(1), pp.65-89
    Description: This study evaluates the acidification status and trends in streams of forested mountain ranges in Germany in consequence of reduced anthropogenic deposition since the mid 1980s. The analysis is based on water quality data for 86 long-term monitored streams in the Ore Mountains, the Bavarian Forest, the Fichtelgebirge, the Harz Mountains, the Spessart, the Black Forest, the Thuringian Forest, and the Rheinisches Schiefergebirge of Germany and the Vosges of France. Within the observation period, which starts for the individual streams between 1980 and 2001 and ends between 1990 and 2009, trends in chemical water quality were calculated with the Seasonal Mann Kendall Test. About 87% of the streams show significant ( p 〈 0.05) negative trends in sulfate. The general reduction in acid deposition resulted in increased pH values (significant for 66% of the streams) and subsequently decreased base cation concentrations in the stream water (for calcium significant in 58% and magnesium 49% of the streams). Reaction products of acidification such as aluminum (significant for 50%) or manganese (significant for 69%) also decreased. Nitrate (52% with significant decrease) and chloride (38% with significant increase) have less pronounced trends and more variable spatial patterns. For the quotient of acidification, which is the ratio of the sum of base cations and the sum of acid anions, no clear trend is observed: in 44% of the monitored streams values significantly decreased and in 23% values significantly increased. A notable observation is the increasing DOC concentration, which is significant for 55% of the observed streams.
    Keywords: Water quality ; Acidification ; Forested catchments ; Deposition ; Germany
    ISSN: 0167-6369
    E-ISSN: 1573-2959
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  • 2
    Language: English
    In: Annals of Forest Science, 2019, Vol.76(2), pp.1-9
    Description: Key message The NFIWADS database contains aggregated results for the German National Forest Inventory (NFI) plots based on process-based water balance simulations. More than 150 water budget, soil moisture, and drought stress indicators were derived for mature, closed-canopy beech and spruce stands, and provide a basis for the assessment of forest productivity and risks. Dataset is available in the Open Agrar repository (Schmidt-Walter et al 2018) athttps://www.openagrar.de/receive/openagrar_mods_00044576. Associated metadata is available athttps://metadata-afs.nancy.inra.fr/geonetwork/srv/fre/catalog.search#/metadata/2f09d81c-b663-48a0-8b84-0b247bba6d35.
    Keywords: Forest inventory ; Soil water availability ; Water balance ; Drought stress ; Climate change
    ISSN: 1286-4560
    E-ISSN: 1297-966X
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