Current and future variations of nutrient depositions and influences on tree growth

Rollenbeck, Rütger; Otte, Insa; Fabian, Peter; Wilcke, Wolfgang; Pucha Cofrep, Darwin; Bräuning, Achim; Bendix, Jörg (2013). Current and future variations of nutrient depositions and influences on tree growth. In: Bendix, Jörg; Beck, Erwin; Bräuning, Achim; Makeschin, Franz; Mosandl, Reinhard; Scheu, Stefan; Wilcke, Wolfgang (eds.) Ecosystem Services, Biodiversity and Environmental Change in a Tropical Mountain Ecosystem of South Ecuador. Ecological Studies: Vol. 221 (pp. 287-296). Heidelberg: Springer

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Current nutrient deposition shows episodic variations which likely may impact the local nutrient cycle at the RBSF. Comparing analyses of deposition data during present-day atmospheric circulation and phases of high biomass burning in the Amazon, characteristic relationships between remote emissions and local deposition are determined. By using projections drawn from the special report on emission scenarios (SRES) in combination with a trajectory modeling tool, future nutrient deposition conditions of the mountain ecosystem are assessed. Observations of relations between climatic variables, current time series of nutrient deposition, and tree growth point to an impact of the remote fertilization effect of atmospheric matters, emitted primarily by human activities like biomass burning and agricultural and industrial sources. The increasing emissions in the future may have adverse effects on the ecosystem in the long run.

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