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Article
Altitudinal and Latitudinal Variations of Snowpack N Concentration over the French Alps
The aim of the study was to get a picture of the geographical variations of N deposition in the snowpack over the French Alps. Using a collaborative research approach, we sampled 139 snow cores along 27 altitu...
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Article
Low nitrogen use efficiency and high nitrate leaching in a highly fertilized Coffea arabica–Inga densiflora agroforestry system: a 15N labeled fertilizer study
In intensive cultivation of coffee (Coffea arabica L.), large N fertilizer inputs are thought to increase nitrate (NO3 −) water contamination and greenhouse gas emissions. This study was carried o...
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Article
N deposition, N transformation and N leaching in acid forest soils
Nitrogen deposition, mineralisation, uptake and leaching were measured on a monthly basis in the field during 2 years in six forested stands on acidic soils under mountainous climate. Studies were conducted in...
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Article
Decomposition of 15N-labelled beech litter and fate of nitrogen derived from litter in a beech forest
The decomposition and the fate of 15N- labelled beech litter was monitored in a beech forest (Vosges mountains, France) over 3 years. Circular plots around beech trees were isolated from neighbouring tree roots b...
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Chapter
Spatial Variability and Long-Term Trends in Mass Balance of N and S in Central European Forested Catchments
Acid deposition linked to SO2 emissions has provoked a large-scale acidification of soils and waters in Europe. Losses of nutrients caused by soil acidification, enhancement of forest growth by nitrogen depositio...
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Chapter
The Fate of 15N-Labelled Nitrogen Inputs to Coniferous and Broadleaf Forests
Nitrogen in forest soils is mainly composed of organic N compounds originating from litterfall. During leaf senescence of the forest vegetation, N compounds are either allocated to perennial tissues or remain ...
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Chapter
Soil Nitrogen Turnover — Mineralisation, Nitrification and Denitrification in European Forest Soils
Mineralisation, nitrification and denitrification are major processes in the soil nitrogen cycle (see Schulze, Fig. 1.2, this Vol. Chap. 1). Nitrogen (N) mineralisation is by definition the biotic conversion o...
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Chapter
Model Analysis of Carbon and Nitrogen Cycling in Picea and Fagus Forests
The CANIF project experimentally investigates the carbon and nitrogen flows in Picea abies and Fagus sylvatica forest stands. The experimental subprojects encompass a large diversity of research subjects ranging ...
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Chapter
Experimental Sites in the NIPHYS/CANIF Project
The NIPHYS/CANIF sites Fig. 2.1 were chosen to represent a latitudinal, climatic and deposition transect through Europe containing conifer and broadleaf stands. The main species are Norway spruce, Picea abies L. ...
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Article
δ15N of forest soil and understorey vegetation reflect the former agricultural land use
Since the middle of the 19th century, the area covered by forests in France has doubled. These new forests grow on previous agricultural lands. We have studied the influence of this agricultural history on the 15
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Article
Evidence of Springwater Acidification in the Vosges Mountains (North-East of France): Influence of Bedrock Buffering Capacity
Investigations on springwater acidity were carried out in the Vosges mountains (north-eastern France). Acid or poorly buffered spring and streamwaters were detected in the same area. The proportion of acid spr...
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Article
Base Cation Supply in Spruce and Beech Ecosystems of the Strengbach Catchment (Vosges Mountains, N-E France)
In spruce and beech stands, mineral budgets for a rotation period were calculated from measured element fluxes. The release of base cations by mineral weathering was calculated with the steady state soil chemi...
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Article
Critical loads of acidity to surface waters in the Vosges massif (north-east of France)
Acid clearwater fishless streams have been identified in the Vosges mountains. In order to evaluate the relatipnships between acidifying factors (such as atmospheric deposition), buffering factors (such as bed...
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Chapter and Conference Paper
Atmospheric Deposition, Forest Management and Soil Nutrient Availability: A Modelling Exercise
Soil and stream water acidification modelling has become a major research topic for soil scientists and ecologists during the last decade. Relations between acidifying factors, soil and water acidification and...
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Chapter and Conference Paper
Water Regime and Magnesium Deficiency: Manipulative Experiments in Young Norway Spruce Stands
Two main symptoms are typical of silver fir (Abies alba Mill., hereafter shortened to “fir”) and Norway spruce (Picea abies (L.) Karst., hereafter shortened to “spruce”) decline in Europe: (a) crown thinning; and...
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Chapter and Conference Paper
Atmospheric Deposition in France and Possible Relation with Forest Decline
With the exception of a few pioneering studies such as the work of Albert Levy (1877-1907, in Ulrich and Williot 1993) at the turn of the last century, precipitation chemistry monitoring in rural areas really ...
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Chapter and Conference Paper
Cycling and Budgets of Acidity and Nutrients in Norway Spruce Stands in Northeastern France and the Erzgebirge (Czech Republic)
In order to analyse the mechanisms by which acid deposition is acting in soils, and its effects on soil chemistry and stand nutrition, a set of field studies were initiated or extended in coniferous stands in ...
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Chapter and Conference Paper
Potential Role of Aluminium Toxicity in Nutrient Deficiencies as Related to Forest Decline: An Assessment of Soil Solution Data from the Vosges Mountains
Two of the most striking features of acid soils are their high exchangeable Al content and their low base cation status. Although acid soils have proved to be unsuitable for a number of agricultural species, m...
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Article
Effects of drought on the yellowing status and the dynamics of mineral elements in the xylem sap of declining spruce (Picea abies L.)
In order to test the effects of drought on the occurrence of spruce yellowing, in the Vosges Mountains (northeastern France), the soil of a plot of a 30-year-old spruce stand was protected from throughfall inp...
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Article
Hydrochemical budgets of a small forested granitic catchment exposed to acid deposition: The strengbach catchment case study (Vosges massif, France)
Hydrochemical budgets have been obtained for the 3-yr period 1986–89 at Strengbach, a small granitic basin in the Vosges mountains (north-eastern France). Here, the spruce forest shows both yellowing and crown...