Nutrient retention in a microcatchment with low levels of anthropogenic pollution

Streamside native forests filter nutrients and sediments from extra-riparian environments. Most related studies have been carried out in environments chronically polluted by nutrients, making it difficult to assess whether the detected patterns would hold in less polluted areas, such as Chile. Howev...

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Autores principales:	Cuevas,Jaime G, Huertas,Jenny, Leiva,César, Paulino,Leandro, Dörner,José, Arumí,José L
Lenguaje:	English
Publicado:	Universidad Austral de Chile, Facultad de Ciencias Forestales 2014
Materias:	cationic exchange capacity groundwater nitrogen cycle phosphorus adsorption riparian zones
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002014000100008
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spelling	oai:scielo:S0717-920020140001000082014-05-29Nutrient retention in a microcatchment with low levels of anthropogenic pollutionCuevas,Jaime GHuertas,JennyLeiva,CésarPaulino,LeandroDörner,JoséArumí,José L cationic exchange capacity groundwater nitrogen cycle phosphorus adsorption riparian zones Streamside native forests filter nutrients and sediments from extra-riparian environments. Most related studies have been carried out in environments chronically polluted by nutrients, making it difficult to assess whether the detected patterns would hold in less polluted areas, such as Chile. However, there are no studies about Chilean natural streamside vegetation ability to filter nutrients and sediment. We hypothesized that southern Chilean streamside forests efficiently retain nutrients due to their, previously documented, tight nitrogen cycle especially in terms of fixation, mineralization and plant uptake, in addition to the high phosphorus adsorption by volcanic soils and high cation retention due to the expected higher cationic exchange capacity (CEC) in floodplains. We studied a fluvial terrace with grasslands covering the uplands, a forest on a slope, and a floodplain with native trees adjacent to a creek. We laid out nine parallel transects in the aforementioned environments and installed five wells in each transect. We extracted and analyzed groundwater three times a year, finding that the nitrate concentration decreased in the transect from the grassland to the floodplain forest. Ammonium, calcium, potassium, and electrical conductivity increased in the same transect, but these variables were always higher than those in the stream. Moreover, soil chemical determinations showed that ammonium, basic cations, aluminum, aluminum saturation and organic matter increased significantly in the floodplain soil compared to the grassland soil. The CEC was marginally different in the studied transects. We conclude that native forest ecosystems constitute effective filters for the studied nutrients, highlighting the associated soils role.info:eu-repo/semantics/openAccessUniversidad Austral de Chile, Facultad de Ciencias ForestalesBosque (Valdivia) v.35 n.1 20142014-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002014000100008en10.4067/S0717-92002014000100008
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	cationic exchange capacity groundwater nitrogen cycle phosphorus adsorption riparian zones
spellingShingle	cationic exchange capacity groundwater nitrogen cycle phosphorus adsorption riparian zones Cuevas,Jaime G Huertas,Jenny Leiva,César Paulino,Leandro Dörner,José Arumí,José L Nutrient retention in a microcatchment with low levels of anthropogenic pollution
description	Streamside native forests filter nutrients and sediments from extra-riparian environments. Most related studies have been carried out in environments chronically polluted by nutrients, making it difficult to assess whether the detected patterns would hold in less polluted areas, such as Chile. However, there are no studies about Chilean natural streamside vegetation ability to filter nutrients and sediment. We hypothesized that southern Chilean streamside forests efficiently retain nutrients due to their, previously documented, tight nitrogen cycle especially in terms of fixation, mineralization and plant uptake, in addition to the high phosphorus adsorption by volcanic soils and high cation retention due to the expected higher cationic exchange capacity (CEC) in floodplains. We studied a fluvial terrace with grasslands covering the uplands, a forest on a slope, and a floodplain with native trees adjacent to a creek. We laid out nine parallel transects in the aforementioned environments and installed five wells in each transect. We extracted and analyzed groundwater three times a year, finding that the nitrate concentration decreased in the transect from the grassland to the floodplain forest. Ammonium, calcium, potassium, and electrical conductivity increased in the same transect, but these variables were always higher than those in the stream. Moreover, soil chemical determinations showed that ammonium, basic cations, aluminum, aluminum saturation and organic matter increased significantly in the floodplain soil compared to the grassland soil. The CEC was marginally different in the studied transects. We conclude that native forest ecosystems constitute effective filters for the studied nutrients, highlighting the associated soils role.
author	Cuevas,Jaime G Huertas,Jenny Leiva,César Paulino,Leandro Dörner,José Arumí,José L
author_facet	Cuevas,Jaime G Huertas,Jenny Leiva,César Paulino,Leandro Dörner,José Arumí,José L
author_sort	Cuevas,Jaime G
title	Nutrient retention in a microcatchment with low levels of anthropogenic pollution
title_short	Nutrient retention in a microcatchment with low levels of anthropogenic pollution
title_full	Nutrient retention in a microcatchment with low levels of anthropogenic pollution
title_fullStr	Nutrient retention in a microcatchment with low levels of anthropogenic pollution
title_full_unstemmed	Nutrient retention in a microcatchment with low levels of anthropogenic pollution
title_sort	nutrient retention in a microcatchment with low levels of anthropogenic pollution
publisher	Universidad Austral de Chile, Facultad de Ciencias Forestales
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002014000100008
work_keys_str_mv	AT cuevasjaimeg nutrientretentioninamicrocatchmentwithlowlevelsofanthropogenicpollution AT huertasjenny nutrientretentioninamicrocatchmentwithlowlevelsofanthropogenicpollution AT leivacesar nutrientretentioninamicrocatchmentwithlowlevelsofanthropogenicpollution AT paulinoleandro nutrientretentioninamicrocatchmentwithlowlevelsofanthropogenicpollution AT dornerjose nutrientretentioninamicrocatchmentwithlowlevelsofanthropogenicpollution AT arumijosel nutrientretentioninamicrocatchmentwithlowlevelsofanthropogenicpollution
_version_	1718444198175178752

Nutrient retention in a microcatchment with low levels of anthropogenic pollution

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