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Armesto, J., Smith-Ramírez, C., Carmona, M., Celis-Diez, J.L., Díaz, I., Gaxiola, A., Gutiérrez, A.G., Nunez-Avila, M., Pérez, C. and Rozzi, R. (2009) Old-Growth Temperate Rain Forests of South America: Conservation, Plant-Animal Interactions, and Baseline Biogeochemical Processes. In: Wirth, C., Gleixner, G. and Heiman, M., Eds., Old-Growth Forests. Function, Fate and Value. Ecological Studies, Vol. 207, Springer Berlin, Heidelberg, 367-390.

has been cited by the following article:

• TITLE: Hydrological Controls on Nutrient Exportation from Old-Growth Evergreen Rainforests and Eucalyptus nitens Plantation in Headwater Catchments at Southern Chile

  AUTHORS: Carlos E. Oyarzun, Pedro Hervé-Fernández, Dries Huygens, Pascal Boeckx, Niko E. C. Verhoest

  KEYWORDS: Native Rainforests, Exotic Plantations, Nutrient Fluxes, Hydrological Controls, Headwater Catchments

  JOURNAL NAME: Open Journal of Modern Hydrology, Vol.5 No.2, April 9, 2015

  ABSTRACT: Soil cover disturbances have a direct effect on biogeochemistry, potentially enhancing nutrient loss, land degradation and associated changes in ecosystem services and livelihood support. The objective of this study was to assess how canopy affected throughfall chemistry and how hydrology affected stream nutrient load responses in two watersheds dominated by native old-growth evergreen rainforest (NF) and exotic plantation of Eucalyptus nitens (EP), located at the Coastal mountain range of southern Chile (40°S). We measured nitrogen (NO3-N, NH4-N, Organic-N, Total-N) and total phosphorus (Total-P) at catchment discharge, and δ18O in throughfall precipitation and stream discharge in both catchments, in order to separate throughfall (or new water) contributions during storm events. It was hypothesized that all nutrients showed an increase in concentration as discharge increased (or enhanced hydrological access), in EP; but not in NF. Our results indicated that Organic-N, Total-N and Total-P concentrations were positively related to discharge. However, NO3--N showed a negative correlation with catchment discharge. Organic-N and Total-P showed a flush during storm events; the opposite was observed for NO3--N. However, this behavior suggested that NO3--N was being retained by charged particles or soil micro biota, whether Organic-N was flushed as it was more concentrated in big pore water that was not tightly attached, compared with NO3--N.