Hermann F. Jungkunst

Hermann F. Jungkunst
Universität Koblenz-Landau · iES Landau Institute of Environmental Sciences

Professor of Geoecology & Physical Geography

About

112
Publications
50,471
Reads
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2,281
Citations
Citations since 2016
40 Research Items
1410 Citations
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2016201720182019202020212022050100150200250
Introduction
Interdisciplinary Landscape Biogeochemistry, Plant-Soil Interactions, Interfaces between pedosphere, hydrosphere and atmosphere - feedback to the anthroposhere
Additional affiliations
April 2012 - present
Universität Koblenz-Landau
Position
  • Head of Department
November 2007 - March 2012
Georg-August-Universität Göttingen
Position
  • Senior Researcher
Description
  • Independant research and teaching
November 2005 - October 2007
Georg-August-Universität Göttingen
Position
  • PostDoc Position
Description
  • Postdoctoral Coordinator of the DFG Research Training Group 1086
Education
August 2000 - July 2004
University of Hohenheim
Field of study
  • Soil Science
October 1992 - October 1999
University of Tuebingen
Field of study
  • Physical Geography

Publications

Publications (112)
Article
Full-text available
Soil organic carbon (SOC) holds the largest terrestrial carbon stock because of soil conditions and processes that favor soil carbon persistence. Vulnerable to climate change, SOC may cross a tipping point toward liberating carbon‐based greenhouse gases, implying massive self‐amplifying SOC‐ climate interactions. Estimates of SOC persistence are ch...
Chapter
Wetlands play a much greater role in the global carbon cycle than their area share would suggest. Plant biomass production and restricted decomposition due to continuous soil water saturation make them important atmospheric carbon sinks. This fragile stage can quickly tip towards being atmospheric sources by droughts and drainages. Therefore, they...
Article
Full-text available
Root-specific and leaf-specific biomarkers have been used for decades to identify the origin of organic materials in soils and sediments. However, quantitative approaches require appropriate knowledge about the fate of these indicator molecules during degradation. To clarify this issue, we performed a 1-year incubation experiment with fine root and...
Article
Full-text available
Phosphate fertilization contributes to an input of uranium (U) in agricultural soils. Although its accumulation and fate in agricultural soils have been previously studied, its colloidal transport and accumulation along slopes through erosion have been studied to a lesser extent in viticulture soils. To bridge this gap, the contents and potential m...
Article
Full-text available
Litter decomposition is a key process for carbon and nutrient cycling in terrestrial ecosystems and is mainly controlled by environmental conditions, substrate quantity, and quality as well as microbial community abundance and composition. In particular, the effects of climate and atmospheric nitrogen (N) deposition on litter decomposition and its...
Article
Full-text available
Background: Gaseous matter exchanges in soil are determined by the connectivity of the pore system which is easily clogged by fresh root exudates. However, it remains unclear how a hydrogel (e.g., mucilage) affects soil pore tortuosity and gas diffusion properties when drying. Aims: The aim of this viewpoint study is to extend the understanding of...
Article
Full-text available
Growing evidence suggests that climate classification facilitates the identification of zones that either agree or disagree with processes explaining soil organic carbon (SOC) persistence. Already forty years ago, Post et al. (1982) posited that the strict temperature and precipitation-based classification defining the Holdridge Life Zones (HLZ) pr...
Article
Full-text available
Growing evidence suggests that climate classification facilitates the identification of zones that either agree or disagree with processes explaining soil organic carbon (SOC) persistence. Already forty years ago, Post et al. (1982) posited that the strict temperature and precipitation‐based classification defining the Holdridge Life Zones (HLZ) pr...
Article
Full-text available
SAP 21608 Data do envio: 24/01/2019 Data do aceite: 31/03/2019 Sci. Agrar. Parana., Marechal Cândido Rondon, v. 18, n. 3, jul./set., p. 218-225, 2019 RESUMO-As alterações de uso e manejo do solo têm-se tornado pauta também, em ambientes de discussão sobre alterações do clima, sido apontada como causa dessas mudanças. Diante do exposto, objetivou-se...
Article
Full-text available
• New plant functions in the exchange of greenhouse gases between ecosystems and atmosphere have recently been discovered. We tested whether photosynthetic activity has an effect on N2O emission rates from incubated plant–soil systems. • Two laboratory experiments were performed. One to unravel possible effect of photosynthetic activity on the net...
Article
As alterações de uso e manejo do solo têm-se tornado pauta também, em ambientes de discussão sobre alterações do clima, sido apontada como causa dessas mudanças. Diante do exposto, objetivou-se com o presente trabalho avaliar se a adição do glifosato influencia o efluxo de dióxido de carbono (CO2) e metano (CH4) em manejos de solos. Amostras de 500...
Chapter
Within the chapter we review the knowledge and scientific gaps on how plant invaders influence soil carbon. We conclude • Invasive plants influence soil carbon storage and cycling but not in a unidirectional manner. • Differing effects depend on the specific invasive species, suppressed native vegetation type, soil characteristics, and hydrological...
Chapter
When one looks at the global distribution of soil organic carbon (SOC) stocks, a few patterns emerge (Figure 3.1). The SOC density is not uniformly distributed and nitrogen (N) is strongly associated with it. Hot spots of SOC density exist primarily in the northern higher latitudes and again in smaller pockets in the equatorial regions. But even th...
Article
Full-text available
Long-term environmental research networks are one approach to advancing local, regional, and global environmental science and education. A remarkable number and wide variety of environmental research networks operate around the world today. These are diverse in funding, infrastructure, motivating questions, scientific strengths, and the sciences th...
Article
Full-text available
Spatial or temporal forest–peatland transition zones were proposed as potential hot spots of methane (CH4) emissions. Consequently, paludified soils are an important component of boreal landscape biogeochemistry. However, their role in the regional carbon cycle remains unclear. This study presents CH4 fluxes from two forest–peatland transition zone...
Article
Full-text available
Through litter decomposition enormous amounts of carbon is emitted to the atmosphere. Numerous large-scale decomposition experiments have been conducted focusing on this fundamental soil process in order to understand the controls on the terrestrial carbon transfer to the atmosphere. However, previous studies were mostly based on site-specific litt...
Article
Studies on the impacts of land-use and land-cover change on stream hydrochemistry in active deforestation zones of the Amazon agricultural frontier are limited and have often used low-temporal-resolution datasets. Moreover, these impacts are not concurrently assessed in well-established agricultural areas and new deforestations hotspots. We aimed t...
Article
Full-text available
Through litter decomposition enormous amount of carbon is emitted to the atmosphere. Numerous large-scale decomposition experiments have been conducted focusing on this fundamental soil process in order to understand the controls on the terrestrial carbon transfer to the atmosphere. However, previous studies were mostly based on site-specific litte...
Article
Full-text available
Through litter decomposition enormous amounts of carbon is emitted to the atmosphere. Numerous large-scale decomposition experiments have been conducted focusing on this fundamental soil process in order to under-stand the controls on the terrestrial carbon transfer to the atmosphere. However, previous studies were mostly based on site-specific litt...
Preprint
Studies on the impacts of land-use and land-cover change on stream hydrochemistry in active deforestation zones of the Amazon agricultural frontier are limited and have often used low-temporalresolution datasets. We aimed to identify these impacts using an experimental setup to collect high-temporal-resolution hydrological and hydrochemical data in...
Article
Full-text available
The calculation of robust estimates of future greenhouse gas emissions due to agriculture is essential to support the framing of the Brazilian climate change mitigation policy. Information on the future development of land use and land cover change (LULCC) under the combination of various driving factors operating at different spatial scale levels,...
Article
Full-text available
This article describes the design of a new model-based assessment framework to identify and analyse possible future trajectories of agricultural development and their environmental consequences within the states of Mato Grosso and Pará in Southern Amazonia, Brazil. The objective is to provide a tool for improving the information basis for scientist...
Article
Full-text available
The superlative environmental conditions in Southern Amazonia, i.e. high temperatures and annual rainfall, create ideal conditions for high soil organic matter turnover rates and therewith the soil-atmosphere exchanges of greenhouse gases. In this study, we present daily observations of soil-related carbon dioxide (Co2), nitrous oxide (N2O), and me...
Article
Full-text available
What would current ecosystems be like without the impact of mankind? This question, which is critical for ecosystem management, has long remained unanswered due to a lack of present-day data from truly undisturbed ecosystems. Using mountaineering techniques, we accessed pristine relict ecosystems in the Peruvian Andes to provide this baseline data...
Article
Full-text available
Climate projections propose that drought stress will become challenging for establishing trees. The magnitude of stress is dependent on tree species, provenance, and most likely also highly influenced by soil quality. European Beech (Fagus sylvatica) is of major ecological and economical importance in Central European forests. The species has an es...
Article
Process-oriented models have become important tools in terms of quantification of environmental changes, for filling measurement gaps, and building of future scenarios. It is especially important to couple model application directly with measurements for remote areas, such as Southern Amazonia, where direct measurements are difficult to perform con...
Article
Full-text available
Managing ecosystems for carbon storage may also benefit biodiversity conservation, but such a potential 'win-win' scenario has not yet been assessed for tropical agroforestry landscapes. We measured above-and below-ground carbon stocks as well as the species richness of four groups of plants and eight of animals on 14 representative plots in Sulawe...
Article
Full-text available
Brazil typifies the land use changes happening in South America, where natural vegetation is continuously converted into agriculturally used lands, such as cattle pastures and croplands. Such changes in land use are always associated with changes in the soil nutrient cycles and result in altered greenhouse gas fluxes from the soil to the atmosphere...
Article
Full-text available
About 60% of the European wetlands are located in the European part of Russia. Nevertheless, data on methane emissions from wetlands of that area are absent. Here we present results of methane emission measurements for two climatically different years from a boreal peatland complex in European Russia. Winter fluxes were well within the range of wha...
Article
Bark pH is an essential parameter which partly governs the chemistry of the bark as well as its suitability as a microhabitat to a wide range of epiphytic organisms. Bark pH is known to vary with tree species, epiphytic cover, stemflow channelization, and anthropogenic influences. To date, reliable methods to quantify the spatial and temporal dimen...
Poster
Full-text available
It is an indisputable fact that human activities are affecting properties and development of ecosystems to such a degree that it is, nowadays, almost impossible to get baseline values from undisturbed ecosystems. This baseline data is crucial for settling preconceived ideas of what is ‘natural’, whilst providing information on the extent of human i...
Conference Paper
Full-text available
Human activity affects properties and development of ecosystems across the globe to such a degree that it is challenging to get baseline values for undisturbed ecosystems. This is especially true for soils, which are affected by land-use history and hold a legacy of past human interventions. Therefore, it is still largely unknown how soil would hav...
Article
Full-text available
Earthworms (EWs) and mycorrhizal fungi are key components of soil biota participating in N recycling from leaf litter. The extent to which their interactions impact leaf litter-derived N uptake by tree species colonized by different mycorrhizal types and the variation of these interactions with leaf litter quality is unknown. We used a greenhouse e...
Article
Als Folge des Klimawandels steigt vielerorts die Gefahr der Bodenerosion, insbesondere auf brachliegenden Ackerflächen. Dies resultiert v.a. aus höheren winterlichen Niederschlagssummen sowie aus einer Zunahme sommerlicher Starkniederschlagsereignisse auf ausgetrocknete Böden. Jugendliche erforschen im Gelände, Labor und Experiment/Modell das Ausma...
Conference Paper
Full-text available
Human activity affects properties and development of ecosystems across the globe to such a degree that it is challenging to get baseline values for undisturbed ecosystems. This is especially true for soils, which are affected by land-use history and hold a legacy of past human interventions. Therefore, it is still largely unknown how soil would hav...
Article
Full-text available
TThe process based soil loss model EROSION 2D is used for simulation of soil erosion, sediment transport and deposition on sloped cropland in Campo Verde region of Mato Grosso. Since contour banks and no-till measures are well established tools in local agricultural management, the study targets on estimating protection potential of both measures....
Article
Full-text available
Human activity affects properties and development of ecosystems across the globe, to such a degree that it is nowadays challenging to get baseline values for undisturbed ecosystems. This is especially true for soil development, which is potentially affected by land-use history and holds a legacy of past human interventions. Therefore, it is still l...
Conference Paper
Full-text available
Human activities affected ecosystems worldwide to such an extent that there is even discussion that we have entered a new geological epoch, the Anthropocene. Although numerous studies quantified human impact on varies ecosystem processes and properties, the natural state of many ecosystems and their soils remains unknown. Moreover, human influence...
Article
• Context Old-growth forests with natural forest development and complex stand structure have become extremely rare in Central Europe. Changes of biogeochemistry and the N cycle across a full forest development cycle are not well understood. • Aims We tested the hypothesis that net N mineralization and the relative importance of nitrification are i...
Article
Full-text available
Nitrous oxide (N 2 O) is a potent greenhouse gas, which has to be included in national inventories because it is contributing to global warming. It primarily originates from agriculturally managed soils. These represent area sources, which are much more difficult to account for than point sources, such as power plants or industrial sources. The Int...
Data
A video abstract is available for download at: http://iopscience.iop.org/1748-9326/9/1/014007/
Article
Full-text available
Forest soils contribute ca. 70 % to the global soil organic carbon (SOC) pool and thus are an important element of the global carbon cycle. Forests also harbour a large part of the global terrestrial biodiversity. It is not clear, however, whether tree species diversity affects SOC. By measuring the carbon concentration of different soil particle s...
Article
Full-text available
Wetland soils are an important pool in the global carbon cycle. The greenhouse gases carbon dioxide, methane and nitrous oxide exchange between the atmosphere and wetland soils and are highly controlled by the water table. We performed a soil incubation experiment with four different soils from the Drakensberg, South Africa. Under same conditions i...
Article
Full-text available
The global importance of wetlands in the carbon and nitrogen cycle are well documented, but the specific characteristics of South African wetlands are less known. The global importance of wetlands in the carbon and nitrogen cycles are well documented, but the specific greenhouse gas characteristics of South African wetlands are less well known. The...