Andre Velescu
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View article: Chlorine in plants and soils of a tropical lower montane forest in Ecuador: Development during two decades
Chlorine in plants and soils of a tropical lower montane forest in Ecuador: Development during two decades Open
Aims Cl is a micronutrient mainly supplied via deposition of marine aerosols. We assessed the development of Cl concentrations and stocks in plants and soils of a tropical montane forest far from a downwind ocean during two decades (1998–2…
View article: Kinetics of element release by weathering in soils of southern Ecuador: A comparison among different climatic and land-use regimes
Kinetics of element release by weathering in soils of southern Ecuador: A comparison among different climatic and land-use regimes Open
To predict future changes in nutrient availability in the young soils of the tropical Andes, it is important to study the response of weathering rates to climate and land-use change. This is particularly true in highly biodiverse tropical …
View article: The importance of diversity for ecosystem functioning increases in heterogeneous environments
The importance of diversity for ecosystem functioning increases in heterogeneous environments Open
Aim Significant progress has been made in understanding the links between biodiversity and ecosystem functioning in both experimental and real-world ecosystems. Yet, we have limited understanding to which extent biodiversity affects ecosys…
View article: Sources and Sinks of N in Ecosystem Solutions Along the Water Path Through a Tropical Montane Forest in Ecuador Assessed With δ<sup>15</sup>N Values of Total Dissolved Nitrogen
Sources and Sinks of N in Ecosystem Solutions Along the Water Path Through a Tropical Montane Forest in Ecuador Assessed With δ<sup>15</sup>N Values of Total Dissolved Nitrogen Open
The globally increasing reactive N richness affects even remote ecosystems such as the tropical montane forests in Ecuador. We tested whether the δ 15 N values of total dissolved N (TDN), measured directly in solution with a TOC‐IRMS, can …
View article: Environmental conditions differently shape leaf, seed and seedling trait composition between and within elevations of tropical montane forests
Environmental conditions differently shape leaf, seed and seedling trait composition between and within elevations of tropical montane forests Open
The composition of plant functional traits varies in response to environmental conditions due to processes of community assembly and species sorting. However, there is a lack of understanding of how plant trait composition responds to envi…
View article: Above‐ and belowground strategies of tropical montane tree species are coordinated and driven by small‐scale nitrogen availability
Above‐ and belowground strategies of tropical montane tree species are coordinated and driven by small‐scale nitrogen availability Open
The question whether the strategies of above‐ and belowground plant organs are coordinated as predicted by the plant economics spectrum theory is still under debate. We aim to determine the leading dimensions of tree trait variation for ab…
View article: Abiotic factors similarly shape the distribution of fruit, seed and leaf traits in tropical fleshy-fruited tree communities
Abiotic factors similarly shape the distribution of fruit, seed and leaf traits in tropical fleshy-fruited tree communities Open
The distribution of plant traits is related to abiotic and biotic factors, but it is unknown whether different types of plant traits respond similarly to these factors. We simultaneously studied seed, fruit and leaf traits and their associ…
View article: Carbon Stable Isotope Ratio of Dissolved Organic Matter as a Tool To Identify Its Sources and Transformations in a Tropical Montane Forest in Ecuador
Carbon Stable Isotope Ratio of Dissolved Organic Matter as a Tool To Identify Its Sources and Transformations in a Tropical Montane Forest in Ecuador Open
Dissolved organic matter (DOM) contributes to forest C cycling. We assessed temporal variability, sources, and transformations of DOM during four years in a tropical montane forest with the help of stable C isotope ratios (δ13C values). We…
View article: Nitrogen release from different polymer‐coated urea fertilizers in soil is affected by soil properties
Nitrogen release from different polymer‐coated urea fertilizers in soil is affected by soil properties Open
The use of urea as nitrogen (N) fertilizer in agriculture needs to consider environmental, economic and resource conservation aspects because of low N‐use efficiency (NUE). Polymer‐coated urea (PCU) offers an effective way to improve the N…
View article: Nutrient cycling and plant trait variation - two crucial processes for simulating the community assembly and productivity of tropical forests
Nutrient cycling and plant trait variation - two crucial processes for simulating the community assembly and productivity of tropical forests Open
<p>Community assembly in highly diverse tropical rainforests is poorly understood and advancing our understanding is crucial for predicting ecosystem responses to future environmental change. Dynamic vegetation models which include p…
View article: Nutrient cycling drives plant community trait assembly and ecosystem functioning in a tropical mountain biodiversity hotspot
Nutrient cycling drives plant community trait assembly and ecosystem functioning in a tropical mountain biodiversity hotspot Open
Summary Community trait assembly in highly diverse tropical rainforests is still poorly understood. Based on more than a decade of field measurements in a biodiversity hotspot of southern Ecuador, we implemented plant trait variation and i…
View article: Total organic carbon concentrations in ecosystem solutions of a remote tropical montane forest respond to global environmental change
Total organic carbon concentrations in ecosystem solutions of a remote tropical montane forest respond to global environmental change Open
The response of organic carbon (C) concentrations in ecosystem solutions to environmental change affects the release of dissolved organic matter (DOM) from forests to surface and groundwaters. We determined the total organic C (TOC) concen…
View article: Plant diversity influenced gross nitrogen mineralization, microbial ammonium consumption and gross inorganic N immobilization in a grassland experiment
Plant diversity influenced gross nitrogen mineralization, microbial ammonium consumption and gross inorganic N immobilization in a grassland experiment Open
Gross rates of nitrogen (N) turnover inform about the total N release and consumption. We investigated how plant diversity affects gross N mineralization, microbial ammonium (NH 4 + ) consumption and gross inorganic N immobilization in gra…
View article: Accounting for multiple ecosystem services in a simulation of land‐use decisions: Does it reduce tropical deforestation?
Accounting for multiple ecosystem services in a simulation of land‐use decisions: Does it reduce tropical deforestation? Open
Conversion of tropical forests is among the primary causes of global environmental change. The loss of their important environmental services has prompted calls to integrate ecosystem services (ES) in addition to socio‐economic objectives …
View article: Temporal Trends of Phosphorus Cycling in a Tropical Montane Forest in Ecuador During 14 Years
Temporal Trends of Phosphorus Cycling in a Tropical Montane Forest in Ecuador During 14 Years Open
Increased bioavailability of P can have a negative impact on plant biodiversity. In an approximately 9‐ha catchment under N + P‐limited megadiverse tropical montane forest in Ecuador, we budgeted all major P fluxes and determined whether t…
View article: Sodium demand of microorganisms in the phyllosphere and the organic layer of a tropical montane forest in south Ecuador
Sodium demand of microorganisms in the phyllosphere and the organic layer of a tropical montane forest in south Ecuador Open
Recent studies raise the hypothesis that Na shortage restricts decomposition and affects the carbon cycle in tropical forests. When Na concentrations in soils are low and the stands are far off-coast, they do not receive substantial Na inp…
View article: Base metal budgets of a small catchment in a tropical montane forest in South Ecuador
Base metal budgets of a small catchment in a tropical montane forest in South Ecuador Open
In a tropical montane rain forest in south Ecuador, the alkali and earth alkali metals Ca, Mg, K, and Na are supplied by weathering of the parent substrate consisting of phyllites and metasandstones and by atmospheric inputs. Phases of aci…
View article: Response of Dissolved Carbon and Nitrogen Concentrations to Moderate Nutrient Additions in a Tropical Montane Forest of South Ecuador
Response of Dissolved Carbon and Nitrogen Concentrations to Moderate Nutrient Additions in a Tropical Montane Forest of South Ecuador Open
In the past two decades, the tropical montane rain forests in south Ecuador experienced increasing deposition of reactive nitrogen mainly originating from Amazonian forest fires, while Saharan dust inputs episodically increased deposition …