Regulation of Nitrogen Fixation from Free-Living Organisms in Soil and Leaf Litter of two tropical forests of the Guiana shield
Biological fixation of atmospheric nitrogen (N2) is the main pathway for introducing N into unmanaged ecosystems. While recent estimates suggest that free-living N fixation (FLNF) accounts for the majority of N fixed in mature tropical forests, the controls governing this process are not completely...
| Autores: | , , , , , , , , , , , , , , |
|---|---|
| Tipo de documento: | artigo |
| Data de publicação: | 2019 |
| País: | España |
| Recursos: | Universitat Autònoma de Barcelona |
| Repositório: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglês |
| OAI Identifier: | oai:ddd.uab.cat:203986 |
| Acesso em linha: | https://ddd.uab.cat/record/203986 https://dx.doi.org/urn:doi:10.1007/s11104-019-04012-1 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Free-living nitrogen fixation Tropical forest French Guiana Nutrients Phosphorus Molybdenum |
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Regulation of Nitrogen Fixation from Free-Living Organisms in Soil and Leaf Litter of two tropical forests of the Guiana shieldVan Langenhove, Leandro|||0000-0002-9603-5106Depaepe, Thomas|||0000-0003-2656-3437Vicca, Sara|||0000-0001-9812-5837Berge, Joke Van denStahl, Clément|||0000-0001-5411-1169Courtois, Elodie A.Weedon, J. T.|||0000-0003-0491-8719Urbina Barreto, Ifigenia|||0000-0002-8541-950XGrau Fernández, Oriol|||0000-0002-3816-9499Asensio, Dolores|||0000-0002-7622-1200Peñuelas, Josep|||0000-0002-7215-0150Boeckx, Pascal|||0000-0003-3998-0010Richter, Andreas|||0000-0003-3282-4808van Der Straeten, Dominique|||0000-0002-7755-1420Janssens, Ivan|||0000-0002-5705-1787Free-living nitrogen fixationTropical forestFrench GuianaNutrientsPhosphorusMolybdenumBiological fixation of atmospheric nitrogen (N2) is the main pathway for introducing N into unmanaged ecosystems. While recent estimates suggest that free-living N fixation (FLNF) accounts for the majority of N fixed in mature tropical forests, the controls governing this process are not completely understood. The aim of this study was to quantify FLNF rates and determine its drivers in two tropical pristine forests of French Guiana. We used the acetylene reduction assay to measure FLNF rates at two sites, in two seasons and along three topographical positions, and used regression analyses to identify which edaphic explanatory variables, including carbon (C), nitrogen (N), phosphorus (P) and molybdenum (Mo) content, pH, water and available N and P, explained most of the variation in FLNF rates. Overall, FLNF rates were lower than measured in tropical systems elsewhere. In soils seasonal variability was small and FLNF rates differed among topographies at only one site. Water, P and pH explained 24% of the variation. In leaf litter, FLNF rates differed seasonally, without site or topographical differences. Water, C, N and P explained 46% of the observed variation. We found no regulatory role of Mo at our sites. Rates of FLNF were low in primary rainforest on poor soils on the Guiana shield. Water was the most important rate-regulating factor and FLNF increased with increasing P, but decreased with increasing N. Our results support the general assumption that N fixation in tropical lowland forests is limited by P availability. 22019-01-0120192019-01-01Articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/203986https://dx.doi.org/urn:doi:10.1007/s11104-019-04012-1reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengEuropean Commission https://doi.org/10.13039/501100000780 610028open accesshttp://purl.org/coar/access_right/c_abf2Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.https://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:2039862026-06-06T12:50:31Z |
| dc.title.none.fl_str_mv |
Regulation of Nitrogen Fixation from Free-Living Organisms in Soil and Leaf Litter of two tropical forests of the Guiana shield |
| title |
Regulation of Nitrogen Fixation from Free-Living Organisms in Soil and Leaf Litter of two tropical forests of the Guiana shield |
| spellingShingle |
Regulation of Nitrogen Fixation from Free-Living Organisms in Soil and Leaf Litter of two tropical forests of the Guiana shield Van Langenhove, Leandro|||0000-0002-9603-5106 Free-living nitrogen fixation Tropical forest French Guiana Nutrients Phosphorus Molybdenum |
| title_short |
Regulation of Nitrogen Fixation from Free-Living Organisms in Soil and Leaf Litter of two tropical forests of the Guiana shield |
| title_full |
Regulation of Nitrogen Fixation from Free-Living Organisms in Soil and Leaf Litter of two tropical forests of the Guiana shield |
| title_fullStr |
Regulation of Nitrogen Fixation from Free-Living Organisms in Soil and Leaf Litter of two tropical forests of the Guiana shield |
| title_full_unstemmed |
Regulation of Nitrogen Fixation from Free-Living Organisms in Soil and Leaf Litter of two tropical forests of the Guiana shield |
| title_sort |
Regulation of Nitrogen Fixation from Free-Living Organisms in Soil and Leaf Litter of two tropical forests of the Guiana shield |
| dc.creator.none.fl_str_mv |
Van Langenhove, Leandro|||0000-0002-9603-5106 Depaepe, Thomas|||0000-0003-2656-3437 Vicca, Sara|||0000-0001-9812-5837 Berge, Joke Van den Stahl, Clément|||0000-0001-5411-1169 Courtois, Elodie A. Weedon, J. T.|||0000-0003-0491-8719 Urbina Barreto, Ifigenia|||0000-0002-8541-950X Grau Fernández, Oriol|||0000-0002-3816-9499 Asensio, Dolores|||0000-0002-7622-1200 Peñuelas, Josep|||0000-0002-7215-0150 Boeckx, Pascal|||0000-0003-3998-0010 Richter, Andreas|||0000-0003-3282-4808 van Der Straeten, Dominique|||0000-0002-7755-1420 Janssens, Ivan|||0000-0002-5705-1787 |
| author |
Van Langenhove, Leandro|||0000-0002-9603-5106 |
| author_facet |
Van Langenhove, Leandro|||0000-0002-9603-5106 Depaepe, Thomas|||0000-0003-2656-3437 Vicca, Sara|||0000-0001-9812-5837 Berge, Joke Van den Stahl, Clément|||0000-0001-5411-1169 Courtois, Elodie A. Weedon, J. T.|||0000-0003-0491-8719 Urbina Barreto, Ifigenia|||0000-0002-8541-950X Grau Fernández, Oriol|||0000-0002-3816-9499 Asensio, Dolores|||0000-0002-7622-1200 Peñuelas, Josep|||0000-0002-7215-0150 Boeckx, Pascal|||0000-0003-3998-0010 Richter, Andreas|||0000-0003-3282-4808 van Der Straeten, Dominique|||0000-0002-7755-1420 Janssens, Ivan|||0000-0002-5705-1787 |
| author_role |
author |
| author2 |
Depaepe, Thomas|||0000-0003-2656-3437 Vicca, Sara|||0000-0001-9812-5837 Berge, Joke Van den Stahl, Clément|||0000-0001-5411-1169 Courtois, Elodie A. Weedon, J. T.|||0000-0003-0491-8719 Urbina Barreto, Ifigenia|||0000-0002-8541-950X Grau Fernández, Oriol|||0000-0002-3816-9499 Asensio, Dolores|||0000-0002-7622-1200 Peñuelas, Josep|||0000-0002-7215-0150 Boeckx, Pascal|||0000-0003-3998-0010 Richter, Andreas|||0000-0003-3282-4808 van Der Straeten, Dominique|||0000-0002-7755-1420 Janssens, Ivan|||0000-0002-5705-1787 |
| author2_role |
author author author author author author author author author author author author author author |
| dc.subject.none.fl_str_mv |
Free-living nitrogen fixation Tropical forest French Guiana Nutrients Phosphorus Molybdenum |
| topic |
Free-living nitrogen fixation Tropical forest French Guiana Nutrients Phosphorus Molybdenum |
| description |
Biological fixation of atmospheric nitrogen (N2) is the main pathway for introducing N into unmanaged ecosystems. While recent estimates suggest that free-living N fixation (FLNF) accounts for the majority of N fixed in mature tropical forests, the controls governing this process are not completely understood. The aim of this study was to quantify FLNF rates and determine its drivers in two tropical pristine forests of French Guiana. We used the acetylene reduction assay to measure FLNF rates at two sites, in two seasons and along three topographical positions, and used regression analyses to identify which edaphic explanatory variables, including carbon (C), nitrogen (N), phosphorus (P) and molybdenum (Mo) content, pH, water and available N and P, explained most of the variation in FLNF rates. Overall, FLNF rates were lower than measured in tropical systems elsewhere. In soils seasonal variability was small and FLNF rates differed among topographies at only one site. Water, P and pH explained 24% of the variation. In leaf litter, FLNF rates differed seasonally, without site or topographical differences. Water, C, N and P explained 46% of the observed variation. We found no regulatory role of Mo at our sites. Rates of FLNF were low in primary rainforest on poor soils on the Guiana shield. Water was the most important rate-regulating factor and FLNF increased with increasing P, but decreased with increasing N. Our results support the general assumption that N fixation in tropical lowland forests is limited by P availability. |
| publishDate |
2019 |
| dc.date.none.fl_str_mv |
2 2019-01-01 2019 2019-01-01 |
| dc.type.none.fl_str_mv |
Article http://purl.org/coar/resource_type/c_6501 AM http://purl.org/coar/version/c_ab4af688f83e57aa |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
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article |
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https://ddd.uab.cat/record/203986 https://dx.doi.org/urn:doi:10.1007/s11104-019-04012-1 |
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https://ddd.uab.cat/record/203986 https://dx.doi.org/urn:doi:10.1007/s11104-019-04012-1 |
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Inglés eng |
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Inglés |
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eng |
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European Commission https://doi.org/10.13039/501100000780 610028 |
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open access http://purl.org/coar/access_right/c_abf2 https://rightsstatements.org/vocab/InC/1.0/ |
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info:eu-repo/semantics/openAccess |
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open access http://purl.org/coar/access_right/c_abf2 https://rightsstatements.org/vocab/InC/1.0/ |
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openAccess |
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application/pdf |
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reponame:Dipòsit Digital de Documents de la UAB instname:Universitat Autònoma de Barcelona |
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