Nitrogen Status and Dynamics in German Forest Soils

Fleck, Stefan; Eickenscheidt, Nadine; Ahrends, Bernd; Evers, Jan; Grüneberg, Erik; Ziche, Daniel; Höhle, Juliane; Schmitz, Andreas; Weis, Wendelin; Schmidt-Walter, Paul; Andreae, Henning; Wellbrock, Nicole

doi:10.1007/978-3-030-15734-0_5

Cited by 16 publications

(22 citation statements)

References 74 publications

(88 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The resulting atmospheric deposition of inorganic N to forests is an important determinant of tree growth (Etzold et al, 2020), rendering nitrogen deposition an essential input variable in decision support systems for forestry under environmental change (Panferov et al, 2011;Thiele et al, 2017) and carbon uptake (Du and De Vries, 2018). Accurate quantification of N deposition is also necessary for the estimation of nitrate leaching from forest ecosystems (MacDonald et al, 2002;Johnson et al, 2018;Vuorenmaa et al, 2018) and the calculation of N budget changes in forest soils (Fleck et al, 2019). On a political and administrative level, N deposition estimates are required to assess the success of clean air policy (Hettelingh et al, 2017), the exceedance of critical loads for eutrophication and acidification (De Vries et al, 2015) and in the context of licensing procedures for nitrogen emitting facilities.…”

Section: Introductionmentioning

confidence: 99%

“…For Germany, the German Environmental Agency has funded the development of an emission-based approach that yields features with a higher spatial resolution compared to some European scale models (Schaap et al, 2018). Approaches with higher spatial resolution have been used in Germany for many years (Gauger et al, 2008;Builtjes et al, 2011;Schaap et al, 2015Schaap et al, , 2017Schaap et al, , 2018 and its results have been included in numerous impact studies (Hauck et al, 2012;Fleck et al, 2017Fleck et al, , 2019Thiele et al, 2017). In Germany, the EBM approach integrates emission inventories and a large number of local measurements of wet or bulk deposition to TIN deposition estimates with complete spatial coverage.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparison of Methods for the Estimation of Total Inorganic Nitrogen Deposition to Forests in Germany

Ahrends

Schmitz

Prescher

et al. 2020

Front. For. Glob. Change

Self Cite

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of Methods for the Estimation of Total Inorganic Nitrogen Deposition to Forests in Germany

Ahrends

Schmitz

Prescher

et al. 2020

Front. For. Glob. Change

Self Cite

View full text Add to dashboard Cite

“…Recent observations at two forest sites proved the direct effect of S deposition as the main driver for N retention in forest soils. After emission control at the end of the 1990s and reduced atmospheric deposition, the C and N pools in the organic layer declined at the SOB site from 1.86 Mg N ha −1 in 1993 to 0.99 Mg N ha −1 in 2010 (Förster et al, 2017) as well as at a spruce stand in the Czech Republic (Oulehle et al, 2011), indicating a predominant effect of atmospheric deposition on microbial activity and N retention.…”

Section: N Fluxes and N Budgetsmentioning

confidence: 98%

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

View full text Add to dashboard Cite

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.

show abstract

“…KEYWORDS ammonium, Fagus sylvatica, fungi, metatranscriptome, mycorrhiza, nitrate, nitrogen stress, symbiosis Soil N availability is generally a main limiting factor for primary productivity across terrestrial ecosystems including temperate forests (1,2). In forest soil, soluble mineral N pools consist of nitrate and ammonium, whose quantities fluctuate in time and space, depending on soil properties, meteorological conditions, anthropogenic N inputs and biological processes such as mineralization, immobilization, and denitrification (3)(4)(5)(6)(7)(8)(9)(10)(11)(12).…”

mentioning

confidence: 99%

“…S oil N availability is generally a main limiting factor for primary productivity across terrestrial ecosystems including temperate forests (1, 2). In forest soil, soluble mineral N pools consist of nitrate and ammonium, whose quantities fluctuate in time and space, depending on soil properties, meteorological conditions, anthropogenic N inputs and biological processes such as mineralization, immobilization, and denitrification (3–12). While nitrate ions are highly mobile in soil solution and easily lost by leaching, ammonium cations are generally bound to soil colloids and retained in topsoil (13, 14).…”

mentioning

confidence: 99%

Transcriptional Landscape of Ectomycorrhizal Fungi and Their Host Provide Insight into N Uptake from Forest Soil

Perez

Janz

Schneider

et al. 2021

Preprint

View full text Add to dashboard Cite

Mineral nitrogen (N) is a major nutrient showing strong fluctuations in the environment due to anthropogenic activities. Acquisition and translocation of N to forest trees is achieved by highly diverse ectomycorrhizal fungi (EMF) living in symbioses with their host roots. Here, we examined colonized root tips to characterize the entire root-associated fungal community by DNA metabarcoding-Illumina sequencing of the fungal ITS2 molecular marker and used RNA sequencing to target metabolically active fungi and the plant transcriptome after N application. The study was conducted with beech (Fagus sylvatica L), a dominant tree species in central Europe, grown in native forest soil. We demonstrate strong enrichment of 15N from nitrate or ammonium in the ectomycorrhizal roots by stable isotope labeling. The relative abundance of the EMF members in the fungal community was correlated with their transcriptional abundances. The fungal metatranscriptome covered KEGG and KOG categories similar to model fungi and did not reveal significant changes related to N metabolization but species-specific transcription patterns, supporting trait stability. In contrast to the resistance of the fungal metatranscriptome, the transcriptome of the host exhibited dedicated nitrate- or ammonium-responsive changes with upregulation of transporters and enzymes required for nitrate reduction and drastic enhancement of glutamine synthetase transcript levels, indicating channeling of ammonium into the pathway for plant protein biosynthesis. Our results support that self-composed fungal communities associated with tree roots buffer nutritional signals in their own metabolism but do not shield plants from high environmental N.

show abstract

Nitrogen Status and Dynamics in German Forest Soils

Cited by 16 publications

References 74 publications

Comparison of Methods for the Estimation of Total Inorganic Nitrogen Deposition to Forests in Germany

Comparison of Methods for the Estimation of Total Inorganic Nitrogen Deposition to Forests in Germany

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

Transcriptional Landscape of Ectomycorrhizal Fungi and Their Host Provide Insight into N Uptake from Forest Soil

Contact Info

Product

Resources

About

Nitrogen Status and Dynamics in German Forest Soils

Cited by 16 publications

References 74 publications

Comparison of Methods for the Estimation of Total Inorganic Nitrogen Deposition to Forests in Germany

Comparison of Methods for the Estimation of Total Inorganic Nitrogen Deposition to Forests in Germany

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

Transcriptional Landscape of Ectomycorrhizal Fungi and Their Host Provide Insight into N Uptake from Forest Soil

Contact Info

Product

Resources

About

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