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Soil organic carbon stocks in estuarine and marine mangrove ecosystems are driven by nutrient colimitation of P and N

Mangroves play an important role in carbon sequestration, but soil organic carbon (SOC) stocks differ between marine and estuarine mangroves, suggesting differing processes and drivers of SOC accumulation. Here, we compared undegraded and degraded marine and estuarine mangroves in a regional approac...

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Autores principales: Weiss, Christian, Weiss, Joanna, Boy, Jens, Iskandar, Issi, Mikutta, Robert, Guggenberger, Georg
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4979726/
https://www.ncbi.nlm.nih.gov/pubmed/27547332
http://dx.doi.org/10.1002/ece3.2258
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author Weiss, Christian
Weiss, Joanna
Boy, Jens
Iskandar, Issi
Mikutta, Robert
Guggenberger, Georg
author_facet Weiss, Christian
Weiss, Joanna
Boy, Jens
Iskandar, Issi
Mikutta, Robert
Guggenberger, Georg
author_sort Weiss, Christian
collection PubMed
description Mangroves play an important role in carbon sequestration, but soil organic carbon (SOC) stocks differ between marine and estuarine mangroves, suggesting differing processes and drivers of SOC accumulation. Here, we compared undegraded and degraded marine and estuarine mangroves in a regional approach across the Indonesian archipelago for their SOC stocks and evaluated possible drivers imposed by nutrient limitations along the land‐to‐sea gradients. SOC stocks in natural marine mangroves (271–572 Mg ha(−1) m(−1)) were much higher than under estuarine mangroves (100–315 Mg ha(−1) m(−1)) with a further decrease caused by degradation to 80–132 Mg ha(−1) m(−1). Soils differed in C/N ratio (marine: 29–64; estuarine: 9–28), δ (15)N (marine: −0.6 to 0.7‰; estuarine: 2.5 to 7.2‰), and plant‐available P (marine: 2.3–6.3 mg kg(−1); estuarine: 0.16–1.8 mg kg(−1)). We found N and P supply of sea‐oriented mangroves primarily met by dominating symbiotic N(2) fixation from air and P import from sea, while mangroves on the landward gradient increasingly covered their demand in N and P from allochthonous sources and SOM recycling. Pioneer plants favored by degradation further increased nutrient recycling from soil resulting in smaller SOC stocks in the topsoil. These processes explained the differences in SOC stocks along the land‐to‐sea gradient in each mangrove type as well as the SOC stock differences observed between estuarine and marine mangrove ecosystems. This first large‐scale evaluation of drivers of SOC stocks under mangroves thus suggests a continuum in mangrove functioning across scales and ecotypes and additionally provides viable proxies for carbon stock estimations in PES or REDD schemes.
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spelling pubmed-49797262016-08-19 Soil organic carbon stocks in estuarine and marine mangrove ecosystems are driven by nutrient colimitation of P and N Weiss, Christian Weiss, Joanna Boy, Jens Iskandar, Issi Mikutta, Robert Guggenberger, Georg Ecol Evol Original Research Mangroves play an important role in carbon sequestration, but soil organic carbon (SOC) stocks differ between marine and estuarine mangroves, suggesting differing processes and drivers of SOC accumulation. Here, we compared undegraded and degraded marine and estuarine mangroves in a regional approach across the Indonesian archipelago for their SOC stocks and evaluated possible drivers imposed by nutrient limitations along the land‐to‐sea gradients. SOC stocks in natural marine mangroves (271–572 Mg ha(−1) m(−1)) were much higher than under estuarine mangroves (100–315 Mg ha(−1) m(−1)) with a further decrease caused by degradation to 80–132 Mg ha(−1) m(−1). Soils differed in C/N ratio (marine: 29–64; estuarine: 9–28), δ (15)N (marine: −0.6 to 0.7‰; estuarine: 2.5 to 7.2‰), and plant‐available P (marine: 2.3–6.3 mg kg(−1); estuarine: 0.16–1.8 mg kg(−1)). We found N and P supply of sea‐oriented mangroves primarily met by dominating symbiotic N(2) fixation from air and P import from sea, while mangroves on the landward gradient increasingly covered their demand in N and P from allochthonous sources and SOM recycling. Pioneer plants favored by degradation further increased nutrient recycling from soil resulting in smaller SOC stocks in the topsoil. These processes explained the differences in SOC stocks along the land‐to‐sea gradient in each mangrove type as well as the SOC stock differences observed between estuarine and marine mangrove ecosystems. This first large‐scale evaluation of drivers of SOC stocks under mangroves thus suggests a continuum in mangrove functioning across scales and ecotypes and additionally provides viable proxies for carbon stock estimations in PES or REDD schemes. John Wiley and Sons Inc. 2016-06-26 /pmc/articles/PMC4979726/ /pubmed/27547332 http://dx.doi.org/10.1002/ece3.2258 Text en © 2016 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Weiss, Christian
Weiss, Joanna
Boy, Jens
Iskandar, Issi
Mikutta, Robert
Guggenberger, Georg
Soil organic carbon stocks in estuarine and marine mangrove ecosystems are driven by nutrient colimitation of P and N
title Soil organic carbon stocks in estuarine and marine mangrove ecosystems are driven by nutrient colimitation of P and N
title_full Soil organic carbon stocks in estuarine and marine mangrove ecosystems are driven by nutrient colimitation of P and N
title_fullStr Soil organic carbon stocks in estuarine and marine mangrove ecosystems are driven by nutrient colimitation of P and N
title_full_unstemmed Soil organic carbon stocks in estuarine and marine mangrove ecosystems are driven by nutrient colimitation of P and N
title_short Soil organic carbon stocks in estuarine and marine mangrove ecosystems are driven by nutrient colimitation of P and N
title_sort soil organic carbon stocks in estuarine and marine mangrove ecosystems are driven by nutrient colimitation of p and n
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4979726/
https://www.ncbi.nlm.nih.gov/pubmed/27547332
http://dx.doi.org/10.1002/ece3.2258
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