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Late Quaternary environmental changes in Helambu Himal, Central Nepal, recorded in the diatom flora assemblage composition and geochemistry of Lake Panch Pokhari
This study presents changes in diatom flora assemblage composition, TOC, TOC/N and biogenic opal in a 450 cm core of Lake Panch Pokhari, Central Nepal (4,050 m asl), indicating Late Quaternary environmental fl...
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Impact of forest organic farming change on soil microbial C turnover using 13C of phospholipid fatty acids
Situated in the fast-develo** country of Brazil, the Atlantic rainforest Mata Atlântica faces risks generated by population growth-derived problems. Conversion of forest to agriculture has led to a mosaic la...
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Long term effects of manure, charcoal and mineral fertilization on crop production and fertility on a highly weathered Central Amazonian upland soil
Application of organic fertilizers and charcoal increase nutrient stocks in the rooting zone of crops, reduce nutrient leaching and thus improve crop production on acid and highly weathered tropical soils. In ...
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TOC, TON, TOS and TOP in Rainfall, Throughfall, Litter Percolate and Soil Solution of a Montane Rainforest Succession at Mt. Kilimanjaro, Tanzania
Organic nutrients have proven to contribute significantly to nutrient cycling in temperate forest ecosystems. Still, little is known about their relevance in the tropics. In the present study, organic C, N, S ...
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Dissolved Nitrogen, Phosphorus, and Sulfur forms in the Ecosystem Fluxes of a Montane Forest in Ecuador
The N, P, and S cycles in pristine forests are assumed to differ from those of anthropogenically impacted areas, but there are only a few studies to support this. Our objective was therefore to assess the cont...
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Palynological investigations on vegetation and climate change in the Late Quaternary of Lake Rukche area, Gorkha Himal, Central Nepal
Palynological data and pedological investigations including stable isotopes and lignin biomarkers (Glaser et al. in press) from a 4 m core of Lake Rukche (3500 m a.s.l.) enhance our palaeoecological knowledge of ...
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Slash and Char: An Alternative to Slash and Burn Practiced in the Amazon Basin
The forested area in the tropics continues to decrease. It is a challenge to preserve large areas of tropical forest to counteract the accelerating climate change and loss of biodiversity. The cumulative defor...
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History, Current Knowledge and Future Perspectives of Geoecological Research Concerning the Origin of Amazonian Anthropogenic Dark Earths (Terra Preta)
Soil degradation is one of the most severe problems of land use in the lowland humid tropics (Zech 1997) largely due to the fact that soil organic matter (SOM) is mineralized rapidly under the optimum growth t...
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Identifying the Pre-Columbian Anthropogenic Input on Present Soil Properties of Amazonian Dark Earths (Terra Preta)
Soil degradation is one of the most serious problems of land use in the tropics, in particular the Neotropics, because the majority of the soils are very old, deeply weathered, and rather infertile (Zech 1997)...
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Microbial Response to Charcoal Amendments of Highly Weathered Soils and Amazonian Dark Earths in Central Amazonia — Preliminary Results
The abundance of charcoal and highly aromatic humic substances in Amazonian Dark Earths (ADE) suggests that residues of incomplete combustion of organic material (black carbon, pyrogenic carbon, charcoal) are ...
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Soil microbial activities in tree-based crop** systems and natural forests of the Central Amazon, Brazil
Little information is available about the factors controlling soil C and N transformations in natural tropical forests and tree-based crop** systems. The aim of this work was to study the effects of single t...
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Nutrient availability and leaching in an archaeological Anthrosol and a Ferralsol of the Central Amazon basin: fertilizer, manure and charcoal amendments
Soil fertility and leaching losses of nutrients were compared between a Fimic Anthrosol and a Xanthic Ferralsol from Central Amazônia. The Anthrosol was a relict soil from pre-Columbian settlements with high o...
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Organic Chemistry Studies on Amazonian Dark Earths
The organic chemistry of soil organic matter (SOM) in ADEs can be looked at at different scales, depending on the type of interest. At an ecological level, operationally defined SOM fractions with different tu...
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Chapter
Soil Organic Matter Stability in Amazonian Dark Earths
If human activities are indeed primarily responsible for the development of the high C contents in ADE, one might expect that cessation of these activities would result in reductions in organic matter content,...
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Ameliorating physical and chemical properties of highly weathered soils in the tropics with charcoal – a review
Rapid turnover of organic matter leads to a low efficiency of organic fertilizers applied to increase and sequester C in soils of the humid tropics. Charcoal was reported to be responsible for high soil organ...
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The effect of single tree species on soil microbial activities related to C and N cycling in the Siberian artificial afforestation experiment
The effects of grassland conversion to forest vegetation and of individual tree species on microbial activity in Siberia are largely unstudied. Here, we examined the effects of the six most commonly dominant t...
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Tree species mediated soil chemical changes in a Siberian artificial afforestation experiment
Natural and human-induced changes in the composition of boreal forests will likely alter soil properties, but predicting these effects requires a better understanding of how individual forest species alter soi...
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Effects of deforestation on contents and distribution of amino sugars within particle-size fractions of mountain soils
Identifying amino sugar pools in soil may advance our knowledge about microbially derived substances. Our objective was to study the effects of deforestation followed by pasture establishment on amino sugar c...
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Nitrogen cycling assessment in a hedgerow intercrop** system using 15N enrichment
Nitrogen (N) cycling was determined in monocultures of Sorghumbicolor (L.) Moench and alley cropped sorghum with Acaciasaligna (Labill.) H. Wendl. in semiarid Northern Kenya. N inputthrough biological N2 fixation...
