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Distinct responses of soil respiration to experimental litter manipulation in temperate woodland and tropical forest
Global change is affecting primary productivity in forests worldwide, and this, in turn, will alter long‐term carbon (C) sequestration in wooded ecosystems. On one hand, increased primary productivity, for example, in response to elevated atmospheric carbon dioxide (CO (2)), can result in greater in...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5901162/ https://www.ncbi.nlm.nih.gov/pubmed/29686858 http://dx.doi.org/10.1002/ece3.3945 |
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author | Bréchet, Laëtitia M. Lopez‐Sangil, Luis George, Charles Birkett, Ali J. Baxendale, Catherine Castro Trujillo, Biancolini Sayer, Emma J. |
author_facet | Bréchet, Laëtitia M. Lopez‐Sangil, Luis George, Charles Birkett, Ali J. Baxendale, Catherine Castro Trujillo, Biancolini Sayer, Emma J. |
author_sort | Bréchet, Laëtitia M. |
collection | PubMed |
description | Global change is affecting primary productivity in forests worldwide, and this, in turn, will alter long‐term carbon (C) sequestration in wooded ecosystems. On one hand, increased primary productivity, for example, in response to elevated atmospheric carbon dioxide (CO (2)), can result in greater inputs of organic matter to the soil, which could increase C sequestration belowground. On other hand, many of the interactions between plants and microorganisms that determine soil C dynamics are poorly characterized, and additional inputs of plant material, such as leaf litter, can result in the mineralization of soil organic matter, and the release of soil C as CO (2) during so‐called “priming effects”. Until now, very few studies made direct comparison of changes in soil C dynamics in response to altered plant inputs in different wooded ecosystems. We addressed this with a cross‐continental study with litter removal and addition treatments in a temperate woodland (Wytham Woods) and lowland tropical forest (Gigante forest) to compare the consequences of increased litterfall on soil respiration in two distinct wooded ecosystems. Mean soil respiration was almost twice as high at Gigante (5.0 μmol CO (2) m(−2) s(−1)) than at Wytham (2.7 μmol CO (2) m(−2) s(−1)) but surprisingly, litter manipulation treatments had a greater and more immediate effect on soil respiration at Wytham. We measured a 30% increase in soil respiration in response to litter addition treatments at Wytham, compared to a 10% increase at Gigante. Importantly, despite higher soil respiration rates at Gigante, priming effects were stronger and more consistent at Wytham. Our results suggest that in situ priming effects in wooded ecosystems track seasonality in litterfall and soil respiration but the amount of soil C released by priming is not proportional to rates of soil respiration. Instead, priming effects may be promoted by larger inputs of organic matter combined with slower turnover rates. |
format | Online Article Text |
id | pubmed-5901162 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-59011622018-04-23 Distinct responses of soil respiration to experimental litter manipulation in temperate woodland and tropical forest Bréchet, Laëtitia M. Lopez‐Sangil, Luis George, Charles Birkett, Ali J. Baxendale, Catherine Castro Trujillo, Biancolini Sayer, Emma J. Ecol Evol Original Research Global change is affecting primary productivity in forests worldwide, and this, in turn, will alter long‐term carbon (C) sequestration in wooded ecosystems. On one hand, increased primary productivity, for example, in response to elevated atmospheric carbon dioxide (CO (2)), can result in greater inputs of organic matter to the soil, which could increase C sequestration belowground. On other hand, many of the interactions between plants and microorganisms that determine soil C dynamics are poorly characterized, and additional inputs of plant material, such as leaf litter, can result in the mineralization of soil organic matter, and the release of soil C as CO (2) during so‐called “priming effects”. Until now, very few studies made direct comparison of changes in soil C dynamics in response to altered plant inputs in different wooded ecosystems. We addressed this with a cross‐continental study with litter removal and addition treatments in a temperate woodland (Wytham Woods) and lowland tropical forest (Gigante forest) to compare the consequences of increased litterfall on soil respiration in two distinct wooded ecosystems. Mean soil respiration was almost twice as high at Gigante (5.0 μmol CO (2) m(−2) s(−1)) than at Wytham (2.7 μmol CO (2) m(−2) s(−1)) but surprisingly, litter manipulation treatments had a greater and more immediate effect on soil respiration at Wytham. We measured a 30% increase in soil respiration in response to litter addition treatments at Wytham, compared to a 10% increase at Gigante. Importantly, despite higher soil respiration rates at Gigante, priming effects were stronger and more consistent at Wytham. Our results suggest that in situ priming effects in wooded ecosystems track seasonality in litterfall and soil respiration but the amount of soil C released by priming is not proportional to rates of soil respiration. Instead, priming effects may be promoted by larger inputs of organic matter combined with slower turnover rates. John Wiley and Sons Inc. 2018-03-13 /pmc/articles/PMC5901162/ /pubmed/29686858 http://dx.doi.org/10.1002/ece3.3945 Text en © 2018 Crown copyright. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the 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 Bréchet, Laëtitia M. Lopez‐Sangil, Luis George, Charles Birkett, Ali J. Baxendale, Catherine Castro Trujillo, Biancolini Sayer, Emma J. Distinct responses of soil respiration to experimental litter manipulation in temperate woodland and tropical forest |
title | Distinct responses of soil respiration to experimental litter manipulation in temperate woodland and tropical forest |
title_full | Distinct responses of soil respiration to experimental litter manipulation in temperate woodland and tropical forest |
title_fullStr | Distinct responses of soil respiration to experimental litter manipulation in temperate woodland and tropical forest |
title_full_unstemmed | Distinct responses of soil respiration to experimental litter manipulation in temperate woodland and tropical forest |
title_short | Distinct responses of soil respiration to experimental litter manipulation in temperate woodland and tropical forest |
title_sort | distinct responses of soil respiration to experimental litter manipulation in temperate woodland and tropical forest |
topic | Original Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5901162/ https://www.ncbi.nlm.nih.gov/pubmed/29686858 http://dx.doi.org/10.1002/ece3.3945 |
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