NITROGEN FLUXES IN THROUGHFALL AND LITTERFALL IN TWO NOTHOFAGUS FORESTS IN SOUTHERN CHILE APORTES DE NITROGENO POR LA PRECIPITACION DIRECTA Y LA CAIDA DE HOJARASCA EN DOS BOSQUES DE NOTHOFAGUS EN EL SUR DE CHILE

Nitrogen return by leaf litterfall was compared with atmospheric nitrogen deposition for two deciduous Nothofagus stands in southern Chile, located in areas with contrasting land use. The litterfall return of nitrogen in a Nothofagus alpina (Poepp. et Endl.) Oerst. stand at San Pablo de Tregua, in t...

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Autores principales: Jeroen Staelens, Roberto Godoy, Carlos Oyarzún, Karen Thibo, Kris Verheyen
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Publicado: Universidad de Concepción 2005
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spelling oai:doaj.org-article:71fc18d89a054398a8ddd6cbd50830af2021-12-02T07:24:12ZNITROGEN FLUXES IN THROUGHFALL AND LITTERFALL IN TWO NOTHOFAGUS FORESTS IN SOUTHERN CHILE APORTES DE NITROGENO POR LA PRECIPITACION DIRECTA Y LA CAIDA DE HOJARASCA EN DOS BOSQUES DE NOTHOFAGUS EN EL SUR DE CHILE0016-53010717-6643https://doaj.org/article/71fc18d89a054398a8ddd6cbd50830af2005-01-01T00:00:00Zhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432005000200002https://doaj.org/toc/0016-5301https://doaj.org/toc/0717-6643Nitrogen return by leaf litterfall was compared with atmospheric nitrogen deposition for two deciduous Nothofagus stands in southern Chile, located in areas with contrasting land use. The litterfall return of nitrogen in a Nothofagus alpina (Poepp. et Endl.) Oerst. stand at San Pablo de Tregua, in the Cordillera de los Andes, was similar to the litterfall return in a Nothofagus obliqua (Mirb.) Oerst. stand at Paillaco, in the Central Depression. In contrast, the net throughfall and stemflow deposition differed significantly between the two stands. At San Pablo de Tregua, the annual bulk deposition of NH4+ and NO3- was significantly higher than the throughfall and stemflow deposition reaching the forest floor. This demonstrates an uptake of inorganic nitrogen by the aboveground biomass, which was correlated with month-to-month variation in the bulk inorganic nitrogen deposition by precipitation (r² > 0.73). At Paillaco, the canopy uptake of nitrogen was not directly detectable due to an estimated dry deposition input of 4-8 kg inorganic N ha-1 y-1. In both stands, nitrogen return through leaf litterfall (~ 50 kg N ha-1 y-1) was much higher than the atmospheric N deposition load (< 10 kg N ha-1 y-1). The results consequently confirm the low level of atmospheric pollution in the forests of this region. However, the clear difference in net throughfall deposition of inorganic nitrogen between the two stands suggests that the external N input by dry deposition may be considerably higher in the Central depression than in Cordillera de los Andes. More emphasis on monitoring dry atmospheric N deposition is a necessary tool for evaluating the consequences of future emission changesJeroen StaelensRoberto GodoyCarlos OyarzúnKaren ThiboKris VerheyenUniversidad de ConcepciónarticleAmmoniumatmospheric depositioncanopy interactionsnitratenutrient cyclingAmoniociclos de nutrientesdepositación atmosféricainteracciones del doselnitratoBotanyQK1-989ENESGayana: Botanica, Vol 62, Iss 2, Pp 63-71 (2005)
institution DOAJ
collection DOAJ
language EN
ES
topic Ammonium
atmospheric deposition
canopy interactions
nitrate
nutrient cycling
Amonio
ciclos de nutrientes
depositación atmosférica
interacciones del dosel
nitrato
Botany
QK1-989
spellingShingle Ammonium
atmospheric deposition
canopy interactions
nitrate
nutrient cycling
Amonio
ciclos de nutrientes
depositación atmosférica
interacciones del dosel
nitrato
Botany
QK1-989
Jeroen Staelens
Roberto Godoy
Carlos Oyarzún
Karen Thibo
Kris Verheyen
NITROGEN FLUXES IN THROUGHFALL AND LITTERFALL IN TWO NOTHOFAGUS FORESTS IN SOUTHERN CHILE APORTES DE NITROGENO POR LA PRECIPITACION DIRECTA Y LA CAIDA DE HOJARASCA EN DOS BOSQUES DE NOTHOFAGUS EN EL SUR DE CHILE
description Nitrogen return by leaf litterfall was compared with atmospheric nitrogen deposition for two deciduous Nothofagus stands in southern Chile, located in areas with contrasting land use. The litterfall return of nitrogen in a Nothofagus alpina (Poepp. et Endl.) Oerst. stand at San Pablo de Tregua, in the Cordillera de los Andes, was similar to the litterfall return in a Nothofagus obliqua (Mirb.) Oerst. stand at Paillaco, in the Central Depression. In contrast, the net throughfall and stemflow deposition differed significantly between the two stands. At San Pablo de Tregua, the annual bulk deposition of NH4+ and NO3- was significantly higher than the throughfall and stemflow deposition reaching the forest floor. This demonstrates an uptake of inorganic nitrogen by the aboveground biomass, which was correlated with month-to-month variation in the bulk inorganic nitrogen deposition by precipitation (r² > 0.73). At Paillaco, the canopy uptake of nitrogen was not directly detectable due to an estimated dry deposition input of 4-8 kg inorganic N ha-1 y-1. In both stands, nitrogen return through leaf litterfall (~ 50 kg N ha-1 y-1) was much higher than the atmospheric N deposition load (< 10 kg N ha-1 y-1). The results consequently confirm the low level of atmospheric pollution in the forests of this region. However, the clear difference in net throughfall deposition of inorganic nitrogen between the two stands suggests that the external N input by dry deposition may be considerably higher in the Central depression than in Cordillera de los Andes. More emphasis on monitoring dry atmospheric N deposition is a necessary tool for evaluating the consequences of future emission changes
format article
author Jeroen Staelens
Roberto Godoy
Carlos Oyarzún
Karen Thibo
Kris Verheyen
author_facet Jeroen Staelens
Roberto Godoy
Carlos Oyarzún
Karen Thibo
Kris Verheyen
author_sort Jeroen Staelens
title NITROGEN FLUXES IN THROUGHFALL AND LITTERFALL IN TWO NOTHOFAGUS FORESTS IN SOUTHERN CHILE APORTES DE NITROGENO POR LA PRECIPITACION DIRECTA Y LA CAIDA DE HOJARASCA EN DOS BOSQUES DE NOTHOFAGUS EN EL SUR DE CHILE
title_short NITROGEN FLUXES IN THROUGHFALL AND LITTERFALL IN TWO NOTHOFAGUS FORESTS IN SOUTHERN CHILE APORTES DE NITROGENO POR LA PRECIPITACION DIRECTA Y LA CAIDA DE HOJARASCA EN DOS BOSQUES DE NOTHOFAGUS EN EL SUR DE CHILE
title_full NITROGEN FLUXES IN THROUGHFALL AND LITTERFALL IN TWO NOTHOFAGUS FORESTS IN SOUTHERN CHILE APORTES DE NITROGENO POR LA PRECIPITACION DIRECTA Y LA CAIDA DE HOJARASCA EN DOS BOSQUES DE NOTHOFAGUS EN EL SUR DE CHILE
title_fullStr NITROGEN FLUXES IN THROUGHFALL AND LITTERFALL IN TWO NOTHOFAGUS FORESTS IN SOUTHERN CHILE APORTES DE NITROGENO POR LA PRECIPITACION DIRECTA Y LA CAIDA DE HOJARASCA EN DOS BOSQUES DE NOTHOFAGUS EN EL SUR DE CHILE
title_full_unstemmed NITROGEN FLUXES IN THROUGHFALL AND LITTERFALL IN TWO NOTHOFAGUS FORESTS IN SOUTHERN CHILE APORTES DE NITROGENO POR LA PRECIPITACION DIRECTA Y LA CAIDA DE HOJARASCA EN DOS BOSQUES DE NOTHOFAGUS EN EL SUR DE CHILE
title_sort nitrogen fluxes in throughfall and litterfall in two nothofagus forests in southern chile aportes de nitrogeno por la precipitacion directa y la caida de hojarasca en dos bosques de nothofagus en el sur de chile
publisher Universidad de Concepción
publishDate 2005
url https://doaj.org/article/71fc18d89a054398a8ddd6cbd50830af
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