NFIWADS: the water budget, soil moisture, and drought stress indicator database for the German National Forest Inventory (NFI)

Schmidt-Walter, Paul; Ahrends, Bernd; Mette, Tobias; Puhlmann, Heike; Meesenburg, Henning

doi:10.1007/s13595-019-0822-2

Cited by 17 publications

(19 citation statements)

References 36 publications

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“…The water budget model LWF-Brook90 (Version 3.4; Hammel and Kennel, 2001) was used to simulate soil water fluxes for all study sites except NHB site, for which the CoupModel (Jansson and Karlberg, 2004) was applied. Both models demonstrated their potential in simulating unsaturated soil water fluxes using the Richard's equation in many studies 115 (Panferov et al 2009;Baumgarten et al 2014;Thiele et al 2017;Schmidt-Walter et al 2019). Due to a better fit between observed and modelled matrix potentials with CoupModel, we decided to choose the water fluxes from this model for the NHB site (Karl et al 2012).…”

Section: ∆S = Nd + Nf -Nl -Ne -Nu ;mentioning

confidence: 99%

Cycling and retention of nitrogen in European beech (Fagus sylvatica L.) ecosystems under elevated fructification frequency

Brumme¹,

Ahrends²,

Block³

et al. 2021

Preprint

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Abstract. Atmospheric deposition of nitrogen (N) has exceeded its demand for plant increment in forest ecosystems in Germany. High N inputs increased plant growth, the internal N cycling within the ecosystem, the retention of N in soils and plant compartments, and the N output by seepage water. But the processes involved are not fully understood, especially the role of fructification which has increased in its frequency. A field experiment using 15N labelled leaf litter exchange was carried out over a 5.5 years' period at seven long-term monitoring sites with European beech (Fagus sylvatica L.) ecosystems to study the impact of current mast frequency on N cycling. Mean annual leaf litterfall contained 35 kg N ha−1, but about one half of that was recovered in the soil 5.5 years after the establishment of the leaf litter 15N exchange experiment. Retention of leaf litter N in the soil was more closely related to the production of total litterfall than to the leaf litterfall indicating the role of fructification of beech trees in the amount of leaf N retained in the soil. In these forests fructification occurred commonly in intervals of 5 to 10 years, which has now changed to every two to three years as observed during this study period. Seed cupules contributed 51 % to the additional litterfall in mast years which caused a high nutrient demand during their decomposition due to their very high carbon (C) to N and C to phosphorus (P) ratios. Higher mast frequency increased the mass of mean annual litterfall by about 0.5 Mg ha−1 and of litterfall N by 8.7 kg ha−1. Mean net primary production (NPP) increased by about 4 %. Mean total N retention in soils calculated by input and output fluxes was unrelated to total litterfall indicating that mast events were not the primary factor controlling total N retention in soils. Despite reduced N deposition since the 1990s about 5.7 kg N ha−1 out of 20.7 kg N ha−1 deposited annually between 1994 and 2008 were retained in soils notably at acid sites with high N / P and C / P ratios in the organic layers and mineral soils. Ongoing N retention increased the N / P ratios in acid soils with moder type humus forms and reduced the availability of P for plant growth and litter decomposition. Trees retained twice as much N compared to soils by biomass increment particularly in less acid stands where the mineral soils had low C / N ratios.

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Section: ∆S = Nd + Nf -Nl -Ne -Nu ;mentioning

confidence: 99%

Cycling and retention of nitrogen in European beech (Fagus sylvatica L.) ecosystems under elevated fructification frequency

Brumme¹,

Ahrends²,

Block³

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…The water budget model LWF-Brook90 (Version 3.4; Hammel and Kennel, 2001) was used to simulate soil water fluxes for all study sites except the NHB site, for which the CoupModel (Jansson and Karlberg, 2004) was applied. Both models demonstrated their potential in simulating unsaturated soil water fluxes using Richards' equation in many studies (Panferov et al, 2009;Baumgarten et al, 2014;Thiele et al, 2017;Schmidt-Walter et al, 2019). Due to a better fit between observed and modeled matrix potentials with CoupModel, we decided to choose the water fluxes from this model for the NHB site (Karl et al, 2012).…”

Section: Measurements and Calculations Of N Fluxesmentioning

confidence: 99%

Cycling and retention of nitrogen in European beech (<i>Fagus sylvatica</i> L.) ecosystems under elevated fructification frequency

Brumme¹,

Ahrends

Block³

et al. 2021

Biogeosciences

Self Cite

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Abstract. Atmospheric deposition of nitrogen (N) has exceeded its demand for plant increment in forest ecosystems in Germany. High N inputs increased plant growth, the internal N cycling within the ecosystem, the retention of N in soil and plant compartments, and the N output by seepage water. But the processes involved are not fully understood, notably the effect of fructification in European beech (Fagus sylvatica L.) on N fluxes. The frequency of fructification has increased together with air temperature and N deposition, but its impact on N fluxes and the sequestration of carbon (C) and N in soils have been hardly studied. A field experiment using 15N-labeled leaf litter exchange was carried out over a 5.5-year period at seven long-term European beech (Fagus sylvatica L.) monitoring sites to study the impact of current mast frequency on N cycling. Mean annual leaf litterfall contained 35 kg N ha−1, but about one-half of that was recovered in the soil 5.5 years after the establishment of the leaf litter 15N exchange experiment. In these forests, fructification occurred commonly at intervals of 5 to 10 years, which has now changed to every 2 years as observed during this study period. Seed cupules contributed 51 % to the additional litterfall in mast years, which creates a high nutrient demand during their decomposition due to the very high ratios of C to N and C to phosphorus (P). Retention of leaf litter 15N in the soil was more closely related to the production of total litterfall than to the leaf litterfall, indicating the role of seed cupules in the amount of leaf N retained in the soil. Higher mast frequency increased the mass of mean annual litterfall by about 0.5 Mg ha−1 and of litterfall N by 8.7 kg ha−1. Mean net primary production (NPP) increased by about 4 %. Mean total N retention in soils calculated by input and output fluxes was unrelated to total litterfall, indicating that mast events were not the primary factor controlling total N retention in soils. Despite reduced N deposition since the 1990s, about 5.7 out of 20.7 kg N ha−1 deposited annually between 1994 and 2008 was retained in soils, notably at acid sites with high N/P and C/P ratios in the organic layers and mineral soils, indicating P limitation for litter decomposition. Trees retained twice as much N compared to soils by biomass increment, particularly in less acidic stands where the mineral soils had low C/N ratios. These results have major implications for our understanding of the C and N cycling and N retention in forest ecosystems. In particular the role of mast products in N retention needs more research in the future.

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“…They are extended to a maximum of 2.7 m soil depth, if not limited by bedrock. BK50's physical properties of soil (bulk density, soil textures of sandy loam and clay) with the help of pedotransfer can be used to describe soil hydraulic properties such as soil water retention and hydraulic conductivity functions [3], [46]. As suggested by Federer et al [38], the Clapp and Hornberger hydraulic parameters [40] were applied to describe water movement in soils.…”

Section: Soil Parameterizationmentioning

confidence: 99%

“…Spatiotemporal information of water balance components is important for many aspects of water management, hydrological modeling and forest management [1]- [3]. It often serves as initial information for hydrological models to describe discharge generation processes [4], [5] and thus can be applied in the impact assessment of flood events.…”

Section: Introductionmentioning

confidence: 99%

“…At point scale, a water balance simulation is often carried out only for a specific tree species or crop type [27]- [29]. In this field, Schmidt-Walter et al [3] contributed a remarkable work by establishing water budget simulations for 8800 inventory clusters in forests across Germany. However, the point scale approach is limited by its spatial distribution.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pseudo-Spatially-Distributed Modeling of Water Balance Components in the Free State of Saxony

Luong¹,

Poeschmann²,

Vorobevskii³

et al. 2020

Preprint

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Highly-resolved data on water balance components (like runoff or storage) are crucial to improve water management, e.g., in drought or flood situations. Because regional observations of these components cannot be acquired adequately, applying water balance models is a feasible solution. We developed an innovative approach using the physically-based lumped-parameter water balance model BROOK90 (R version) integrated into a sensor network platform to derive daily water budget components for catchments in the Free State of Saxony. The model is not calibrated but rather uses available information on soil, land use and precipitation only. We applied the hydro response units (HRUs) approach for 6175 small and medium-sized catchments. For the evaluation, model output was cross-evaluated in ten selected head catchments in a low mountain range in Saxony. The mean values of Kling-Gupta efficiency (KGE) for the period 2005-2019 to these catchments are 0.63 and 0.75 for daily and monthly discharge simulations, respectively. The simulated evapotranspiration and soil wetness are in good agreement with the SMAP_L4_GPH product in April 2015-2018. The study can be enhanced by using different data platforms as well as available information on study sites.

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NFIWADS: the water budget, soil moisture, and drought stress indicator database for the German National Forest Inventory (NFI)

Cited by 17 publications

References 36 publications

Cycling and retention of nitrogen in European beech (Fagus sylvatica L.) ecosystems under elevated fructification frequency

Cycling and retention of nitrogen in European beech (Fagus sylvatica L.) ecosystems under elevated fructification frequency

Cycling and retention of nitrogen in European beech (<i>Fagus sylvatica</i> L.) ecosystems under elevated fructification frequency

Pseudo-Spatially-Distributed Modeling of Water Balance Components in the Free State of Saxony

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NFIWADS: the water budget, soil moisture, and drought stress indicator database for the German National Forest Inventory (NFI)

Cited by 17 publications

References 36 publications

Cycling and retention of nitrogen in European beech (Fagus sylvatica L.) ecosystems under elevated fructification frequency

Cycling and retention of nitrogen in European beech (Fagus sylvatica L.) ecosystems under elevated fructification frequency

Cycling and retention of nitrogen in European beech (&lt;i&gt;Fagus sylvatica&lt;/i&gt; L.) ecosystems under elevated fructification frequency

Pseudo-Spatially-Distributed Modeling of Water Balance Components in the Free State of Saxony

Contact Info

Product

Resources

About

Cycling and retention of nitrogen in European beech (<i>Fagus sylvatica</i> L.) ecosystems under elevated fructification frequency