Experimental evidence for drought induced alternative stable states of soil moisture
6 páginas.-- 3 figuras.-- 27 referencias.-- Supplementary information in doi: 10.1038/srep20018
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2016-01-25
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dig-irnas-es-10261-1486822021-12-28T15:50:33Z Experimental evidence for drought induced alternative stable states of soil moisture Robinson, David Jones, Scott B. Lebron; Inma Reinsch, Sabine Domínguez, María Teresa Smith, Andrew Jones, Davey L. Marshall, Milles Emmett, B. A. European Commission 6 páginas.-- 3 figuras.-- 27 referencias.-- Supplementary information in doi: 10.1038/srep20018 Ecosystems may exhibit alternative stable states (ASS) in response to environmental change. Modelling and observational data broadly support the theory of ASS, however evidence from manipulation experiments supporting this theory is limited. Here, we provide long-term manipulation and observation data supporting the existence of drought induced alternative stable soil moisture states (irreversible soil wetting) in upland Atlantic heath, dominated by Calluna vulgaris (L.) Hull. Manipulated repeated moderate summer drought, and intense natural summer drought both lowered resilience resulting in shifts in soil moisture dynamics. The repeated moderate summer drought decreased winter soil moisture retention by ~10%. However, intense summer drought, superimposed on the experiment, that began in 2003 and peaked in 2005 caused an unexpected erosion of resilience and a shift to an ASS; both for the experimental drought manipulation and control plots, impairing the soil from rewetting in winter. Measurements outside plots, with vegetation removal, showed no evidence of moisture shifts. Further independent evidence supports our findings from historical soil moisture monitoring at a long-term upland hydrological observatory. The results herald the need for a new paradigm regarding our understanding of soil structure, hydraulics and climate interaction. We thank all the CEH staff members who have contributed to the experiment establishment and maintenance over the years, especially Alwyn Sowerby and Susie Van Baarseel who collected the root data. This research was funded by the EU projects CLIMOOR, VULCAN and INCREASE FP7-INFRASTRUCTURE-2008-1 (Grant Agreement no. 227628). Peer reviewed 2017-04-21T10:36:28Z 2017-04-21T10:36:28Z 2016-01-25 artículo http://purl.org/coar/resource_type/c_6501 Scientific Reports (6) 20018. (2016) http://hdl.handle.net/10261/148682 10.1038/srep20018 2045-2322 http://dx.doi.org/10.13039/501100000780 26804897 en #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/FP7/227628 Publisher's version http://dx.doi.org/10.1038/srep20018 Sí open Nature Publishing Group |
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6 páginas.-- 3 figuras.-- 27 referencias.-- Supplementary information in doi: 10.1038/srep20018 |
| author2 |
European Commission |
| author_facet |
European Commission Robinson, David Jones, Scott B. Lebron; Inma Reinsch, Sabine Domínguez, María Teresa Smith, Andrew Jones, Davey L. Marshall, Milles Emmett, B. A. |
| format |
artículo |
| author |
Robinson, David Jones, Scott B. Lebron; Inma Reinsch, Sabine Domínguez, María Teresa Smith, Andrew Jones, Davey L. Marshall, Milles Emmett, B. A. |
| spellingShingle |
Robinson, David Jones, Scott B. Lebron; Inma Reinsch, Sabine Domínguez, María Teresa Smith, Andrew Jones, Davey L. Marshall, Milles Emmett, B. A. Experimental evidence for drought induced alternative stable states of soil moisture |
| author_sort |
Robinson, David |
| title |
Experimental evidence for drought induced alternative stable states of soil moisture |
| title_short |
Experimental evidence for drought induced alternative stable states of soil moisture |
| title_full |
Experimental evidence for drought induced alternative stable states of soil moisture |
| title_fullStr |
Experimental evidence for drought induced alternative stable states of soil moisture |
| title_full_unstemmed |
Experimental evidence for drought induced alternative stable states of soil moisture |
| title_sort |
experimental evidence for drought induced alternative stable states of soil moisture |
| publisher |
Nature Publishing Group |
| publishDate |
2016-01-25 |
| url |
http://hdl.handle.net/10261/148682 http://dx.doi.org/10.13039/501100000780 |
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