Plants and biological soil crusts modulate the dominance of N forms in a semi-arid grassland
3 pág.- 4 figura.- 9 referencias.- Pdf original en la página web de uno de los autores https://maestrelab.com/wp-content/uploads/2015/10/SBB2010b.pdf
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Elsevier
2010-02
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Subjects: | Dissolved organic nitrogen, Nitrate, Semiarid ecosystem, Biological soil crusts, |
Online Access: | http://hdl.handle.net/10261/340721 |
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dig-irnas-es-10261-3407212023-12-15T09:16:58Z Plants and biological soil crusts modulate the dominance of N forms in a semi-arid grassland Delgado-Baquerizo, Manuel Castillo-Monroy, Andrea P. Maestre, Fernando T. Gallardo, Antonio Ministerio de Ciencia e Innovación (España) European Commission Fundación BBVA Delgado-Baquerizo, Manuel [0000-0002-6499-576X] Maestre, Fernando T. [0000-0002-7434-4856] Gallardo, Antonio [0000-0002-2674-4265] Dissolved organic nitrogen Nitrate Semiarid ecosystem Biological soil crusts 3 pág.- 4 figura.- 9 referencias.- Pdf original en la página web de uno de los autores https://maestrelab.com/wp-content/uploads/2015/10/SBB2010b.pdf It has been suggested that the dominance of N forms should shift from dissolved organic nitrogen (DON) to nitrate along a gradient of increasing N availability. We aimed to apply this model at a local scale within a semi-arid ecosystem showing a high spatial heterogeneity in the distribution of vegetation and soil resources. By doing this, we seek a better understanding of the N cycling in spatially heterogeneous ecosystems. We took soil samples from the three major sources of spatial heterogeneity: the grass Stipa tenacíssima, the N-fixing shrub Retama sphaerocarpa, and open areas. We also sampled the biological soil crust (BSC) located in the latter areas as another source of spatial heterogeneity. BSC microsites were classified by four levels of soil coverage, ranging from high coverage (66%) to bare soil. The proportion of nitrate, ammonium and DON was determined in all microsites. DON was the dominant N form for open areas, while nitrate was dominant under the canopy of Retama; these microsites contained the lowest and highest N availability, respectively. Under BSC, DON was the dominant N form. We found high temporal variability in the dominance of N forms for all microsites. Our results suggest that the biome-derived model of Schimel and Bennett (2004) explaining N form dominance across N availability gradients may be extended to local gradients. F.T.M. was supported by a “Ramón y Cajal” contract from the Spanish MICINN (co-funded by the European Social Fund). This research was funded by grants from the British Ecological Society (ECPG 231/607), the BBVA Foundation (BIOCON06/105), and the MICINN (CGL2008-00986-E/BOS). Peer reviewed 2023-12-15T09:16:58Z 2023-12-15T09:16:58Z 2010-02 artículo Soil Biology and Biochemistry 42(2): 376-378 (2010) 0038-0717 http://hdl.handle.net/10261/340721 10.1016/j.soilbio.2009.11.003 1879-3428 en http://hdl.handle.net/ No none Elsevier |
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Dissolved organic nitrogen Nitrate Semiarid ecosystem Biological soil crusts Dissolved organic nitrogen Nitrate Semiarid ecosystem Biological soil crusts |
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Dissolved organic nitrogen Nitrate Semiarid ecosystem Biological soil crusts Dissolved organic nitrogen Nitrate Semiarid ecosystem Biological soil crusts Delgado-Baquerizo, Manuel Castillo-Monroy, Andrea P. Maestre, Fernando T. Gallardo, Antonio Plants and biological soil crusts modulate the dominance of N forms in a semi-arid grassland |
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3 pág.- 4 figura.- 9 referencias.- Pdf original en la página web de uno de los autores https://maestrelab.com/wp-content/uploads/2015/10/SBB2010b.pdf |
author2 |
Ministerio de Ciencia e Innovación (España) |
author_facet |
Ministerio de Ciencia e Innovación (España) Delgado-Baquerizo, Manuel Castillo-Monroy, Andrea P. Maestre, Fernando T. Gallardo, Antonio |
format |
artículo |
topic_facet |
Dissolved organic nitrogen Nitrate Semiarid ecosystem Biological soil crusts |
author |
Delgado-Baquerizo, Manuel Castillo-Monroy, Andrea P. Maestre, Fernando T. Gallardo, Antonio |
author_sort |
Delgado-Baquerizo, Manuel |
title |
Plants and biological soil crusts modulate the dominance of N forms in a semi-arid grassland |
title_short |
Plants and biological soil crusts modulate the dominance of N forms in a semi-arid grassland |
title_full |
Plants and biological soil crusts modulate the dominance of N forms in a semi-arid grassland |
title_fullStr |
Plants and biological soil crusts modulate the dominance of N forms in a semi-arid grassland |
title_full_unstemmed |
Plants and biological soil crusts modulate the dominance of N forms in a semi-arid grassland |
title_sort |
plants and biological soil crusts modulate the dominance of n forms in a semi-arid grassland |
publisher |
Elsevier |
publishDate |
2010-02 |
url |
http://hdl.handle.net/10261/340721 |
work_keys_str_mv |
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