A5020233449- Soil Carbon and Nitrogen Dynamics
- Soil Management and Crop Yield
- Soil and Water Nutrient Dynamics
- Banana Cultivation and Research
- Peatlands and Wetlands Ecology
- Plant Water Relations and Carbon Dynamics
- Plant nutrient uptake and metabolism
- Forest ecology and management
- Mycorrhizal Fungi and Plant Interactions
- Amazonian Archaeology and Ethnohistory
- Legume Nitrogen Fixing Symbiosis
National Institute of Amazonian Research
2019-2022
Ancient Amazon soils are characterised by low concentrations of soil phosphorus (P). Therefore, it is hypothesised that plants may invest a substantial proportion their resources belowground to adjust P-uptake strategies, including root morphological, physiological (phosphatase enzyme activities) and biotic (arbuscular mycorrhizal (AM) associations) adaptations. Since these strategies energy demanding, we hypothesise trade-offs between morphological traits phosphatase exudation symbiotic...
Soil nutrient availability can strongly affect root traits. In tropical forests, phosphorus (P) is often considered the main limiting for plants. However, support P paradigm limited, and N cations might also control forests functioning. We used a large-scale experiment to determine how factorial addition of nitrogen (N), affected productivity traits related acquisition strategies (morphological traits, phosphatase activity, arbuscular mycorrhizal colonisation contents) in primary rainforest...
Abstract Purpose Large parts of the Amazon rainforest grow on weathered soils depleted in phosphorus and rock-derived cations. We tested hypothesis that this ecosystem, fine roots stimulate decomposition nutrient release from leaf litter biochemically by releasing enzymes, exuding labile carbon stimulating microbial decomposers. Methods monitored a Central tropical rainforest, where were either present or excluded, over 188 days added substrates (glucose citric acid) fully factorial design....
Abstract. Most land surface models (LSMs), i.e. the components of Earth system (ESMs), include representation nitrogen (N) limitation on ecosystem productivity. However, only a few these have incorporated phosphorus (P) cycling. In tropical ecosystems, this is likely to be important as N tends abundant, whereas availability rock-derived elements, such P, can very low. Thus, without P cycling, forest response in areas Amazonia rising atmospheric CO2 conditions remain highly uncertain. study,...
Abstract. Most Land Surface Models (LSMs), the land components of Earth system models (ESMs), include representation N limitation on ecosystem productivity. However only few these have incorporated phosphorus (P) cycling. In tropical ecosystems, this is likely to be particularly important as tends abundant but availability rock-derived elements, such P, can very low. Thus, without a P cycling, forest response in areas Amazonia rising atmospheric CO2 conditions remains highly uncertain....