Remotely-sensed slowing down in spatially patterned dryland ecosystems
Regular vegetation patterns have been predicted to indicate a system slowing down and possibly desertification of drylands. However, these predictions have not yet been observed in dryland vegetation due to the inherent logistic difficulty to gather longer-term in situ data. Here, we evaluate the th...
| Autores principales: | , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Wiley
2022
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/127035 |
| _version_ | 1855518532007100416 |
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| author | Veldhuis, M.P. Martínez Garcia, R. Deblauwe, V. Dakos, V. |
| author_browse | Dakos, V. Deblauwe, V. Martínez Garcia, R. Veldhuis, M.P. |
| author_facet | Veldhuis, M.P. Martínez Garcia, R. Deblauwe, V. Dakos, V. |
| author_sort | Veldhuis, M.P. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Regular vegetation patterns have been predicted to indicate a system slowing down and possibly desertification of drylands. However, these predictions have not yet been observed in dryland vegetation due to the inherent logistic difficulty to gather longer-term in situ data. Here, we evaluate the theoretical prediction that regular vegetation patterns are associated with empirically derived temporal indicators (autocorrelation, variance, responsiveness) of critical slowing down in a dryland ecosystem in Sudan using different remote sensing products.
We use recently developed methods using remote-sensing EVI time-series in combination with classified regular vegetation patterns along a rainfall gradient in Sudan to test the predicted slowing down. We tested our empirical findings against theoretical predictions from a stochastic version of a spatial explicit model that has been used to describe vegetation dynamics in drylands under aridity stress.
Overall, three temporal indicators (responsiveness, temporal autocorrelation, variance) show slowing down as vegetation patterns change from gaps to labyrinths to spots towards more arid conditions, confirming predictions. However, this transition exhibits non-linearities, specifically when patterns change configuration. Model simulations reveal that the transition between patterns temporarily slows down the system affecting the temporal indicators. These transient states when vegetation patterns reorganize thus affect the systems resilience indicators in a non-linear way.
Our findings suggest that spatial self-organization of dryland vegetation is associated with critical slowing down, but this transition towards reduced resilience happens in a non-linear way. Future work should aim to better understand transient dynamics in regular vegetation patterns in dryland ecosystems, because long transients make regular vegetation patterns of limited use for management in anticipating critical transitions. |
| format | Journal Article |
| id | CGSpace127035 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace1270352025-12-08T10:11:39Z Remotely-sensed slowing down in spatially patterned dryland ecosystems Veldhuis, M.P. Martínez Garcia, R. Deblauwe, V. Dakos, V. vegetation resilience sudan ecosystems Regular vegetation patterns have been predicted to indicate a system slowing down and possibly desertification of drylands. However, these predictions have not yet been observed in dryland vegetation due to the inherent logistic difficulty to gather longer-term in situ data. Here, we evaluate the theoretical prediction that regular vegetation patterns are associated with empirically derived temporal indicators (autocorrelation, variance, responsiveness) of critical slowing down in a dryland ecosystem in Sudan using different remote sensing products. We use recently developed methods using remote-sensing EVI time-series in combination with classified regular vegetation patterns along a rainfall gradient in Sudan to test the predicted slowing down. We tested our empirical findings against theoretical predictions from a stochastic version of a spatial explicit model that has been used to describe vegetation dynamics in drylands under aridity stress. Overall, three temporal indicators (responsiveness, temporal autocorrelation, variance) show slowing down as vegetation patterns change from gaps to labyrinths to spots towards more arid conditions, confirming predictions. However, this transition exhibits non-linearities, specifically when patterns change configuration. Model simulations reveal that the transition between patterns temporarily slows down the system affecting the temporal indicators. These transient states when vegetation patterns reorganize thus affect the systems resilience indicators in a non-linear way. Our findings suggest that spatial self-organization of dryland vegetation is associated with critical slowing down, but this transition towards reduced resilience happens in a non-linear way. Future work should aim to better understand transient dynamics in regular vegetation patterns in dryland ecosystems, because long transients make regular vegetation patterns of limited use for management in anticipating critical transitions. 2022-10 2023-01-13T09:35:34Z 2023-01-13T09:35:34Z Journal Article https://hdl.handle.net/10568/127035 en Open Access application/pdf Wiley Veldhuis, M.P., Martinez‐Garcia, R., Deblauwe, V. & Dakos, V. (2022). Remotely‐sensed slowing down in spatially patterned dryland ecosystems. Ecography, 2022(10): e06139, 1-10. |
| spellingShingle | vegetation resilience sudan ecosystems Veldhuis, M.P. Martínez Garcia, R. Deblauwe, V. Dakos, V. Remotely-sensed slowing down in spatially patterned dryland ecosystems |
| title | Remotely-sensed slowing down in spatially patterned dryland ecosystems |
| title_full | Remotely-sensed slowing down in spatially patterned dryland ecosystems |
| title_fullStr | Remotely-sensed slowing down in spatially patterned dryland ecosystems |
| title_full_unstemmed | Remotely-sensed slowing down in spatially patterned dryland ecosystems |
| title_short | Remotely-sensed slowing down in spatially patterned dryland ecosystems |
| title_sort | remotely sensed slowing down in spatially patterned dryland ecosystems |
| topic | vegetation resilience sudan ecosystems |
| url | https://hdl.handle.net/10568/127035 |
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