Immanent conditions determine imminent collapses: nutrient regimes define the resilience of macroalgal communities
| Type | : | ACL |
|---|---|---|
| Nature | : | Production scientifique |
| Au bénéfice du Laboratoire | : | Non |
| Statut de publication | : | Publié |
| Année de publication | : | 2017 |
| Auteurs (10) | : | BOADA Jordi ARTHUR R ALONSO D PAGÈS J,f PESSARRODONA A OLIVA S CECCHERELLI G PIAZZI L ROMERO J ALCOVERRO T |
| Revue scientifique | : | Proceedings of The Royal Society B-biological Sciences |
| Volume | : | 284 |
| Fascicule | : | 1851 |
| Pages | : | |
| DOI | : | 10.1098/rspb.2016.2814 |
| URL | : | - |
| Abstract | : | Predicting where state-changing thresholds lie can be inherently complex in ecosystems characterized by nonlinear dynamics. Unpacking the mechanisms underlying these transitions can help considerably reduce this unpredictability. We used empirical observations, field and laboratory experiments, and mathematical models to examine how differences in nutrient regimes mediate the capacity ofmacrophyte communities to sustain sea urchin grazing. In relatively nutrient-rich conditions, macrophyte systems were more resilient to grazing, shifting to barrens beyond 1 800 g m22 (urchin biomass), more than twice the threshold of nutrient-poor conditions. The mechanisms driving these differences are linked to how nutrients mediate urchin foraging and algal growth: controlled experiments showed that low-nutrient regimes trigger compensatory feeding and reduce plant growth, mechanisms supported by our consumer-resource model. These mechanisms act together to halve macrophyte community resilience. Our study demonstrates that by mediating the underlying drivers, inherent conditions can strongly influence the buffer capacity of nonlinear systems. |
| Mots-clés | : | alternative stable states; ARBACIA-LIXULA; buffer capacity; catastrophic shifts; CATASTROPHIC SHIFTS; compensatory feeding; ECOSYSTEMS; MARINE RESERVES; PATTERNS; PREDATION; ROCKY; SEA-URCHINS; sea urchin barrens; THRESHOLDS; tipping points; URCHIN PARACENTROTUS-LIVIDUS |
| Commentaire | : | Times Cited in Web of Science Core Collection: 27 |
| Tags | : | - |
| Fichier attaché | : | - |
| Citation | : |
Boada J, Arthur R, Alonso D, Pagès JF, Pessarrodona A, Oliva S, Ceccherelli G, Piazzi L, Romero J, Alcoverro T (2017) Immanent conditions determine imminent collapses: nutrient regimes define the resilience of macroalgal communities. P Roy Soc B-biol Sci 284 | doi: 10.1098/rspb.2016.2814
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