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dc.contributor.author
Berdugo, Miguel
dc.contributor.author
Gaitán, Juan José
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dc.contributor.author
Delgado Baquerizo, Manuel
dc.contributor.author
Crowther, Thomas W.
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dc.contributor.author
Dakos, Vasilis
dc.date.available
2023-07-06T17:47:24Z
dc.date.issued
2022-10
dc.identifier.citation
Berdugo, Miguel; Gaitán, Juan José; Delgado Baquerizo, Manuel; Crowther, Thomas W.; Dakos, Vasilis; Prevalence and drivers of abrupt vegetation shifts in global drylands; National Academy of Sciences; Proceedings of the National Academy of Sciences of The United States of America; 119; 43; 10-2022; 1-10
dc.identifier.issn
0027-8424
dc.identifier.uri
http://hdl.handle.net/11336/202636
dc.description.abstract
The constant provision of plant productivity is integral to supporting the liability of ecosystems and human wellbeing in global drylands. Drylands are paradigmatic examples of systems prone to experiencing abrupt changes in their functioning. Indeed, space-for-time substitution approaches suggest that abrupt changes in plant productivity are widespread, but this evidence is less clear using observational time series or experimental data at a large scale. Studying the prevalence and, most importantly, the unknown drivers of abrupt (rather than gradual) dynamical patterns in drylands may help to unveil hotspots of current and future dynamical instabilities in drylands. Using a 20-y global satellite-derived temporal assessment of dryland Normalized Difference Vegetation Index (NDVI), we show that 50% of all dryland ecosystems exhibiting gains or losses of NDVI are characterized by abrupt positive/negative temporal dynamics. We further show that abrupt changes are more common among negative than positive NDVI trends and can be found in global regions suffering recent droughts, particularly around critical aridity thresholds. Positive abrupt dynamics are found most in ecosystems with low seasonal variability or high aridity. Our work unveils the high importance of climate variability on triggering abrupt shifts in vegetation and it provides missing evidence of increasing abruptness in systems intensively managed by humans, with low soil organic carbon contents, or around specific aridity thresholds. These results highlight that abrupt changes in dryland dynamics are very common, especially for productivity losses, pinpoint global hotspots of dryland vulnerability, and identify drivers that could be targeted for effective dryland management.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
National Academy of Sciences
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ABRUPT SHIFTS
dc.subject
DRYLAND ECOLOGY
dc.subject
PRODUCTIVITY DYNAMICS
dc.subject
REMOTE SENSING
dc.subject.classification
Ecología
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Prevalence and drivers of abrupt vegetation shifts in global drylands
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-07-06T14:34:34Z
dc.journal.volume
119
dc.journal.number
43
dc.journal.pagination
1-10
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Berdugo, Miguel. No especifíca;
dc.description.fil
Fil: Gaitán, Juan José. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Luján; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires; Argentina
dc.description.fil
Fil: Delgado Baquerizo, Manuel. No especifíca;
dc.description.fil
Fil: Crowther, Thomas W.. No especifíca;
dc.description.fil
Fil: Dakos, Vasilis. Université Montpellier II; Francia
dc.journal.title
Proceedings of the National Academy of Sciences of The United States of America
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1073/pnas.2123393119
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