Two independent methods for mapping bulk deposition in France

Croisé, Luc; Ulrich, Erwin; Duplat, Pierre; Jaquet, Olivier

doi:10.1016/j.atmosenv.2005.03.021

Cited by 30 publications

(30 citation statements)

References 7 publications

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“…In summary, total and stand deposition of SO 4 2− , H + , Mn 2+ and NH 4 + reported in this paper were much lower than those reported in the above-mentioned studies, whereas total and stand deposition of K + , Ca 2+ and Mg 2+ were approximately the same as or also much lower than those reported in the abovementioned studies. This agrees with the fact that the quantity of bulk precipitation of the investigated forest plots was either the same as or up to 35% lower than that reported in the other studies (Bredemeier 1988;Nordén 1991;Matzner and Meiwes 1994;Meesenburg et al 2009), which is known to influence the deposition quantity of several ions (Croisé et al 2005). In addition, not only the reduced emission of sulphur and to a lesser extent nitrogen during the last years, but also the remote location of the study area contributed to the low deposition of sulphur and nitrogen.…”

Section: +supporting

confidence: 74%

Deposition and canopy exchange processes in central-German beech forests differing in tree species diversity

et al. 2010

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Atmospheric deposition is an important nutrient input to forests. The chemical composition of the rainfall is altered by the forest canopy due to interception and canopy exchange. Bulk deposition and stand deposition (throughfall plus stemflow) of Na 2+ and PO 4 3− was higher in mixed species plots than in pure beech plots due to higher canopy leaching rates in the mixed species plots. The acid input to the canopy and to the soil was higher in pure beech plots than in mixed species plots. The high canopy leaching rates of Mn 2+ in pure beech plots indicated differences in soil properties between the plot types. Indeed, pH, effective cation exchange capacity and base saturation were lower in pure beech plots. This may have contributed to the lower leaching rates of K + , Ca 2+ and Mg 2+ compared to the mixed species plots. However, foliar analyses indicated differences in the ion status among the tree species, which may additionally have influenced canopy exchange. In conclusion, the nutrient input to the soil resulting from deposition and canopy leaching was higher in mixed species plots than in pure beech plots, whereas the acid input was highest in pure beech plots.

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Section: +supporting

confidence: 74%

Deposition and canopy exchange processes in central-German beech forests differing in tree species diversity

et al. 2010

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“…monitored in the CATANEAT network over the period 1993-1998 have been modelled as functions of elevation, monthly precipitation and period of the year. These models have been validated against deposition data for the period 1999-2001 and they have shown a good predictive ability (Croisé et al 2005). We applied these models to the 1993-1998 CRU climate data extracted for each stand pair sampled, and plot elevations.…”

Section: Regional Chronologies Of Environmental Factorsmentioning

confidence: 99%

“…We selected the north-western Atlantic area (sample 2) of common beech distribution in France to complement the initial north-eastern sampling area (sample 1), because soils of the Atlantic area have lower nutritional status (European Commission 2005) and because current rates of total atmospheric nitrogen deposition (4-7 kg ha -1 year -1 ) in western France are lower than in eastern areas (8-13 kg ha -1 year -1 ) (Croisé et al 2005).…”

Section: Study Area and Forest Speciesmentioning

confidence: 99%

“…Recent NO 3 -/NH 4 ? bulk deposition in the open field and throughfall deposition have been monitored on a monthly basis in France on the CATA-NEAT forest network, a subset of the RENECOFOR network (French level-II plots of the ICP forests network; Croisé et al 2005;Ulrich 1999). Bulk deposition is defined as the total deposition of material (wet-only deposition, dry particles, gases and fine aerosols) to a continuously open sampler, and it is generally lower than the total deposition intercepted by vegetated surfaces (Dämmgen et al 2005).…”

Section: Regional Chronologies Of Environmental Factorsmentioning

confidence: 99%

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Nitrogen footprint in a long-term observation of forest growth over the twentieth century

Bontemps

Hervé²,

Leban

et al. 2010

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Environmental drivers of forest productivity increases have been much debated. Evidence for the suggested role of increasing nitrogen supply is lacking over long-term time scales. Tracking the footprint of environmental factors by using long-term growth records may thus prove decisive. We analysed growth chronologies of common beech in two areas of contrasting nutritional status in France. Dominant height growth was used as a proxy for productivity. Growth was compared between old and young paired stands sampled at the same sites to factor out effects of ageing and site. Growth chronologies were estimated with a statistical modelling procedure. The environmental causality of growth changes was addressed by combining (1) a comparison of growth changes between regions, (2) a regional comparison of growth chronologies with chronologies of environmental factors and (3) growth-environment relationships established from climate/soil data. Historical growth increases followed very similar courses in the two areas. Remarkably, the magnitude of change was 50% lower in the area that had reduced nutritional status and nitrogen deposition. Historical variations in environmental factors and growth were congruent with the roles of nitrogen availability and deposition, and of atmospheric CO 2 increase. Low-frequency variations in climate and growth were not coincident. However, our analysis demonstrated the role of climatic anomalies in short-term growth variations. Growth-environment relationships further indicated a nitrogen constraint. These observations corroborate the enhancing role of increased nitrogen availability on forest biomass accumulation previously reported in ecosystem experiments and processbased modelling explorations.

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“…Nitrate and ammonium are deposited in similar proportions in European mountains (Camarero andCatalan, 1993, 1996;Rogora et al, 2001;Croisé et al, 2005). However, NO − 3 is the most common form of N that enters lakes from catchments (Hood et al, 2003;Kopacek et al, 2005).…”

mentioning

confidence: 99%

Isotopic composition of dissolved inorganic nitrogen in high mountain lakes: variation with altitude in the Pyrenees

2010

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Abstract. Nitrogen deposition in remote areas has increased, but the effect on ecosystems is still poorly understood. For aquatic systems, knowledge of the main processes driving the observed variation is limited, as is knowledge of how changes in nitrogen supply affect lake biogeochemical and food web processes. Differences in dissolved inorganic nitrogen (DIN) between lakes cannot be understood without considering catchment characteristics. In mountains, catchment features (e.g., thermal conditions, land cover) vary considerably with elevation. The isotopic composition of nitrogen (δ 15 N) is increasingly used to study aquatic ecosystem dynamics. Here we explore the variability of δ 15 N in DIN in high mountain lakes and show that environmental conditions that change with altitude can affect the isotopic ratio.We measured ammonium and nitrate δ 15 N values in atmospheric deposition, epilimnetic water, deep chlorophyll maximum water (DCMW) and sediment pore water (SPW) from eight mountain lakes in the Pyrenees, both above and below the treeline. Lakes showed relatively uniform δ 15 N-NH + 4 values in SPW (2.2±1.6‰), with no variation corresponding to catchment or lake characteristics. We suggest that organic matter diagenesis under similar sediment conditions is responsible for the low variation between the lakes.In the water column, the range of δ 15 N values was larger for ammonium (−9.4‰ to 7.4‰) than for nitrate (−11.4‰ to −3.4‰), as a result of higher variation both between and within lakes (epilimnetic vs. DCM water). ForCorrespondence to: M. Bartrons (mbartrons@ceab.csic.es) both compounds part of the difference correlated with altitude or catchment features (e.g., scree proportion). Based on concentration, chemical and isotopic tendencies, we suggest that patterns arise from the distinct relative contributions of two types of water flow paths to the lakes: one from snowpack melting, with little soil interaction; and another highly influenced by soil conditions. The snow-type flow path contributes low DIN concentrations depleted in 15 N, whereas the soil-type flow path contributes high nitrate concentrations with higher δ 15 N. The proportion of these two types of source correlates with average catchment features when there is extensive snow cover during spring and early summer and probably becomes more dependent on local characteristics around the lake as summer advances. Lake depth and pore water ammonium concentrations, among other features, introduce secondary variation. In the context of nitrogen deposition studies, lakes with higher snow-type influence will probably register changes in N deposition and pollution sources better, whereas lakes with higher soil-type influence may reflect long-term effects of vegetation and soil dynamics.

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Two independent methods for mapping bulk deposition in France

Cited by 30 publications

References 7 publications

Deposition and canopy exchange processes in central-German beech forests differing in tree species diversity

Deposition and canopy exchange processes in central-German beech forests differing in tree species diversity

Nitrogen footprint in a long-term observation of forest growth over the twentieth century

Isotopic composition of dissolved inorganic nitrogen in high mountain lakes: variation with altitude in the Pyrenees

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