Daniel Puppe

Daniel Puppe
Leibniz Centre for Agricultural Landscape Research | ZALF · Research Area 1 “Landscape Functioning“ Working Group "Silicon Biogeochemistry"

Dr. rer. nat.

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36
Publications
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592
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Publications

Publications (36)
Article
Full-text available
The relevance of biological Si cycling for dissolved silica (DSi) export from terrestrial biogeosystems is still in debate. Even in systems showing a high content of weatherable minerals, like Cambisols on volcanic tuff, biogenic Si (BSi) might contribute > 50% to DSi (Gerard et al., 2008). However, the number of biogeosystem studies is rather limi...
Article
Full-text available
The relevance of biological Si cycling for dissolved silica (DSi) export from terrestrial biogeosystems is still in debate. Even in systems showing a high content of weatherable minerals, like Cambisols on volcanic tuff, biogenic Si (BSi) might contribute > 50% to total DSi (Gerard et~al., 2008). However, the actual number of biogeosystem studies i...
Article
Anthropogenic peatland degradation is a global threat. As peatlands store large amounts of carbon (C) their potential for mitigation of climate change has been emphasized recently. Global C cycling is linked to silicon (Si) fluxes from the continents into the oceans. These fluxes in turn are driven by biosilicification, the incorporation of inorgan...
Article
Full-text available
The detection of auto-fluorescence in phytogenic, hydrated amorphous silica depositions (phytoliths) has been found to be a promising approach to verify if phytoliths were burnt or not, especially in archaeological contexts. However, it is unknown so far at what temperature and how auto-fluorescence is induced in phytoliths. We used fluorescence mi...
Chapter
The role of biota for silicon (Si) cycling in agricultural plant-soil systems has gained much attention in the last decades. Siliceous structures formed by organisms, that is, biogenic silica (BSi), play a key role in (i) linking global Si and carbon cycles and (ii) controlling bioavailability of Si in soils as BSi generally is much more soluble co...
Article
Full-text available
Purpose Silicon (Si) accumulation is an important strategy for plant defense against biotic and abiotic stress. Solid amorphous silica (ASi) deposits have been found to protect plants against different stressors (e.g., drought stress, ultraviolet radiation, herbivory, and pests). Most research on ASi deposits and their subsequent function is conduc...
Article
Full-text available
Various studies have been performed to quantify silicon (Si) stocks in plant biomass and related Si fluxes in terrestrial biogeosystems. Most studies are deliberately designed on the plot scale to ensure low heterogeneity in soils and plant composition, hence similar environmental conditions. Due to the immanent spatial soil variability, the transf...
Article
Full-text available
The policy and practice of ecological restoration and conservation in China obtained some remarkable results. For example, Sphagnum moss growing on abandoned farmland, which was peatland before agricultural use, has rapidly expanded the wetland area in SW China. Microorganisms such as testate amoebae are sensitive to environmental change and thus h...
Article
Due to the fact that silicon (Si) increases the resistance of plants against diverse abiotic and biotic stresses, Si nowadays is categorized as beneficial substance for plants. However, humans directly influence Si cycling on a global scale. Intensified agriculture and corresponding harvest-related Si exports lead to Si losses in agricultural soils...
Article
Full-text available
Plants’ ability to take up silicon from the soil, accumulate it within their tissues and then reincorporate it into the soil through litter creates an intricate network of feedback mechanisms in ecosystems. Here, we provide a concise review of silicon’s roles in soil chemistry and physics and in plant physiology and ecology, focusing on the process...
Preprint
Full-text available
Various studies have been performed to quantify silicon (Si) stocks in plant biomass and related Si fluxes in terrestrial biogeosystems. Most of these studies were performed at relatively small plots with an intended low heterogeneity in soils and plant canopy composition, and results were extrapolated to larger spatial units up to global scale imp...
Article
Altered fire regimes as a response to climate change are significantly affecting terrestrial ecosystems and biogeochemical cycles. In this context, not only natural fires but also anthropogenic fires like rice straw burning have to be considered. While heat effects of fire on some nutrient cycles (e.g., carbon, nitrogen, phosphorus) have been well-...
Article
Soil macropores serve as preferential pathways for water and solute transport as well as for root growth. They are often coated with organic material and known as "hotspots" of nutrient and C turnover. Differences in the SOM composition between macropores and soil matrix as well as between macropore types (biopores, cracks, pinhole fillings) imply...
Article
Full-text available
Silicon (Si) speciation and availability in soils is highly important for ecosystem functioning, because Si is a beneficial element for plant growth. Si chemistry is highly complex compared to other elements in soils, because Si reaction rates are relatively slow and dependent on Si species. Consequently, we review the occurrence of different Si sp...
Article
Full-text available
The dataset in the present article provides information on protozoic silicon (Si) pools represented by euglyphid testate amoebae (TA) in soils of initial and forested biogeosystems. Protozoic Si pools were calculated from densities of euglyphid TA shells and corresponding Si contents. The article also includes data on potential annual biosilicifica...
Article
Full-text available
In structured soils, clay-organic coatings are spatially distributed along macropore surfaces. Information on thickness and volume of coating material is essential for macropore-matrix mass exchange of water and solutes. However, their determination is difficult and fraught with uncertainty due to irregular shapes of macropore surfaces. The objecti...
Article
Many peatlands have been damaged by human activities like Sphagnum harvesting and draining reflected in reduced peatland areas and ecosystem functioning. Peatlands generally play an important role in global silicon (Si) cycling and maintain huge numbers of testate amoebae (TA). However, there is a lack of knowledge on (i) the quantity of protozoic...
Article
Biogenic silicon (BSi) has been found to play a fundamental role in the link between global Si and carbon cycles, because it represents a key factor in the control of Si fluxes from terrestrial to aquatic ecosystems. Furthermore, various beneficial effects of Si accumulation in plants have been revealed, i.e., increased plant growth and resistance...
Article
Testate amoebae are ubiquitous unicellular eukaryotic micro-organisms. They occur in high abundances in terrestrial habitats and contribute to important ecological and biogeochemical processes like silicon cycling. Little is known about the growth of testate amoeba populations under hyperosmotic stress, as caused by salinity pulses due to coastal f...
Article
Full-text available
Soil protists are rarely included in ecotoxicological investigations, despite their fundamental role in ecological processes. Moreover, testate amoebae and diatoms contribute considerably to silicon fluxes in soils. We investigated the effects of heavy metals on testate amoebae (species and individual densities) and diatoms (individual densities) i...
Article
The significance of phytoliths for the control of silicon (Si) fluxes from terrestrial to aquatic ecosystems has been recognized as a key factor. Humankind actively influences Si fluxes by intensified land use, i.e., agriculture and forestry, on a global scale. We hypothesized phytolith distribution and assemblages in soils of agricultural and fore...
Article
The dataset in the present article provides information on protozoic silicon (Si) pools represented by euglyphid testate amoebae (TA) in soils of initial and forested biogeosystems. Protozoic Si pools were calculated from densities of euglyphid TA shells and corresponding Si contents. The article also includes data on potential annual biosilicifica...
Article
The significance of biogenic silicon (BSi) for Si cycling in terrestrial biogeosystems has been acknowledged since decades. Its importance originates from the fact that BSi generally is more soluble than silicate minerals and thus i) controls Si fluxes from terrestrial to aquatic ecosystems and ii) plays an important role as source of readily- or p...
Chapter
Silicon (Si) is considered as a quasiessential element for higher plants as its uptake increases plant growth and resistance against abiotic as well as biotic stresses. Foliar application of fertilizers generally is assumed to be a comparably environment-friendly form of fertilization because only small quantities are needed. The interest in foliar...
Article
Full-text available
The significance of biogenic silicon (BSi) pools as a key factor for the control of Si fluxes from terrestrial to aquatic ecosystems has been recognized for decades. However, while most research has been focused on phytogenic Si pools, knowledge of other BSi pools is still limited. We hypothesized that different BSi pools influence short-term chang...
Article
Full-text available
The significance of biogenic silicon (BSi) pools as a key factor for the control of Si fluxes from terrestrial to aquatic ecosystems has been recognized since decades. However, while most research has been focused on phytogenic Si pools, knowledge on other BSi pools is still limited. We hypothesized different BSi pools to influence short-term chang...
Article
Testate amoebae with self-secreted siliceous shell platelets (“idiosomes”) play an important role in terrestrial silicon (Si) cycles. In this context, Si-dependent culture growth dynamics of idiosomic testate amoebae are of interest. Clonal cultures of idiosomic testate amoebae were analyzed under three different Si concentrations: low (50 μmol L⁻¹...
Article
Full-text available
Soil protists play fundamental roles in many earth system processes, yet we are only beginning to understand the true diversity of the organisms involved. In this study we used conventional (microscopy-based) methods to characterise the diversity and estimate protist population sizes in soils from a variety of distinct habitats within Mere Sands Wo...
Thesis
Auf globaler Ebene sind die biogeochemischen Kreisläufe von Silicium und Kohlenstoff hauptsächlich durch Verwitterungsprozesse und Stoffflüsse gelösten Siliciums aus terrestrischen in aquatische Ökosysteme miteinander verbunden. Diverse Organismen sind in der Lage, amorphe siliciumhaltige Strukturen zu synthetisieren (Biosilifikation), die in Böden...
Article
We hypothesized that at the very beginning of terrestrial ecosystem development, airborne testate amoebae play a pivotal role in facilitating organismic colonization and related soil processes. We, therefore, analyzed size and quantity of airborne testate amoebae and immigration and colonization success of airborne testate amoebae on a new land sur...
Article
Full-text available
The relevance of biological Si cycling for dissolved silica (DSi) export from terrestrial biogeosystems is still in debate. Even in systems showing a high content of weatherable minerals, like Cambisols on volcanic tuff, bio-genic Si (BSi) might contribute > 50 % to DSi (Gerard et al., 2008). However, the number of biogeosystem studies is rather li...
Article
Full-text available
A soil microcosm experiment was conducted in the laboratory with enchytraeids to assess the carbon (C) and nitrogen (N) turnover when feeding on barley straw. The straw originated from a field experiment where the crop was cultivated under elevated atmospheric CO 2 conditions (FACE = Free Air Carbondioxide Enrichment). The CO 2 concentration amount...

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Projects (3)
Project
Numerous studies have proven that biodiversity and ecosystem functioning (BEF) are closely linked. In this context, the interactions between biodiversity and ecosystem functions such as productivity, nutrient cycling, decomposition, and pollination have been in the focus of research. Based on this, we now know that biodiversity usually promotes biomass production and pollination success, for example. However, regarding other BEF relationships, the drawing of general conclusions is hampered by the fact that different studies often show inconsistent results. Thus, for a better understanding of BEF relationships, detailed research on the underlying mechanisms is urgently needed. This knowledge is crucial to harmonize research findings and to craft policies for the conservation of biodiversity, which is severely threatened by global warming and other anthropogenic environmental changes. We are inviting research articles and reviews dealing with all aspects of BEF relationships in terrestrial and aquatic communities. Papers on theoretical approaches, field and laboratory experiments as well as BEF studies in non-manipulated ecosystems are welcome. The aim of this Special Issue is to substantially deepen our understanding of BEF interactions and how to conserve biodiversity in a changing world. Journal: Biology (impact factor: 5.079) For more info see: https://www.mdpi.com/journal/biology/special_issues/biodiversity_ecosystem_communities
Project
We like to find out the effects of silicon on biogeochemical cycles.