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Nitrogen cycling during secondary succession in Atlantic Forest of Bahia, Brazil

Carbon accumulation in tropical secondary forests may be limited in part by nitrogen (N) availability, but changes in N during tropical forest succession have rarely been quantified. We explored N cycle dynamics across a chronosequence of secondary tropical forests in the Mata Atlântica of Bahia, Br...

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Autores principales: Winbourne, Joy B., Feng, Aida, Reynolds, Lovinia, Piotto, Daniel, Hastings, Meredith G., Porder, Stephen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5778002/
https://www.ncbi.nlm.nih.gov/pubmed/29358584
http://dx.doi.org/10.1038/s41598-018-19403-0
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author Winbourne, Joy B.
Feng, Aida
Reynolds, Lovinia
Piotto, Daniel
Hastings, Meredith G.
Porder, Stephen
author_facet Winbourne, Joy B.
Feng, Aida
Reynolds, Lovinia
Piotto, Daniel
Hastings, Meredith G.
Porder, Stephen
author_sort Winbourne, Joy B.
collection PubMed
description Carbon accumulation in tropical secondary forests may be limited in part by nitrogen (N) availability, but changes in N during tropical forest succession have rarely been quantified. We explored N cycle dynamics across a chronosequence of secondary tropical forests in the Mata Atlântica of Bahia, Brazil in order to understand how quickly the N cycle recuperates. We hypothesized that N fixation would decline over the course of succession as N availability and N gaseous losses increased. We measured N fixation, KCl-extractable N, net mineralization and nitrification, resin-strip sorbed N, gaseous N emissions and the soil δ(15)N in stands that were 20, 35, 50, and > 50 years old. Contrary to our initial hypothesis, we found no significant differences between stand ages in any measured variable. Our findings suggest that secondary forests in this region of the Atlantic forest reached pre-disturbance N cycling dynamics after just 20 years of succession. This result contrasts with previous study in the Amazon, where the N cycle recovered slowly after abandonment from pasture reaching pre-disturbance N cycling levels after ~50 years of succession. Our results suggest the pace of the N cycle, and perhaps tropical secondary forest, recovery, may vary regionally.
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spelling pubmed-57780022018-01-31 Nitrogen cycling during secondary succession in Atlantic Forest of Bahia, Brazil Winbourne, Joy B. Feng, Aida Reynolds, Lovinia Piotto, Daniel Hastings, Meredith G. Porder, Stephen Sci Rep Article Carbon accumulation in tropical secondary forests may be limited in part by nitrogen (N) availability, but changes in N during tropical forest succession have rarely been quantified. We explored N cycle dynamics across a chronosequence of secondary tropical forests in the Mata Atlântica of Bahia, Brazil in order to understand how quickly the N cycle recuperates. We hypothesized that N fixation would decline over the course of succession as N availability and N gaseous losses increased. We measured N fixation, KCl-extractable N, net mineralization and nitrification, resin-strip sorbed N, gaseous N emissions and the soil δ(15)N in stands that were 20, 35, 50, and > 50 years old. Contrary to our initial hypothesis, we found no significant differences between stand ages in any measured variable. Our findings suggest that secondary forests in this region of the Atlantic forest reached pre-disturbance N cycling dynamics after just 20 years of succession. This result contrasts with previous study in the Amazon, where the N cycle recovered slowly after abandonment from pasture reaching pre-disturbance N cycling levels after ~50 years of succession. Our results suggest the pace of the N cycle, and perhaps tropical secondary forest, recovery, may vary regionally. Nature Publishing Group UK 2018-01-22 /pmc/articles/PMC5778002/ /pubmed/29358584 http://dx.doi.org/10.1038/s41598-018-19403-0 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Winbourne, Joy B.
Feng, Aida
Reynolds, Lovinia
Piotto, Daniel
Hastings, Meredith G.
Porder, Stephen
Nitrogen cycling during secondary succession in Atlantic Forest of Bahia, Brazil
title Nitrogen cycling during secondary succession in Atlantic Forest of Bahia, Brazil
title_full Nitrogen cycling during secondary succession in Atlantic Forest of Bahia, Brazil
title_fullStr Nitrogen cycling during secondary succession in Atlantic Forest of Bahia, Brazil
title_full_unstemmed Nitrogen cycling during secondary succession in Atlantic Forest of Bahia, Brazil
title_short Nitrogen cycling during secondary succession in Atlantic Forest of Bahia, Brazil
title_sort nitrogen cycling during secondary succession in atlantic forest of bahia, brazil
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5778002/
https://www.ncbi.nlm.nih.gov/pubmed/29358584
http://dx.doi.org/10.1038/s41598-018-19403-0
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