Ecological feedback mechanisms and variable disturbance regimes: the uncertain future of Mediterranean macroalgal forests
| Autor: | Maggi, E., Benedetti-Cecchi, L., Noyon, Margaux, Mcquaid, Christopher, Olsen, Elisabeth, de Cerf, Christopher, Dziwornu, Godwin, Puccinelli, Eleonora, Ansorge, Isabelle, Samaai, Toufiek, Dingle, Laura M.K., Edkins, Adrienne, Sunassee, Suthananda |
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| Přispěvatelé: | Dipartimento di Biologia, University of Pisa - Università di Pisa, Ocean Sciences & Marine Food Security [Port Elizabeth, South Africa], Nelson Mandela Metropolitan University [Port Elizabeth, South Africa], Rhodes University, Grahamstown, Department of Oceanography [Cape Town], University of Cape Town |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Canopy Mediterranean climate Disturbance (geology) Aquatic Science Forests Oceanography Phaeophyta 010603 evolutionary biology 01 natural sciences Mediterranean sea Mediterranean macroalgal forests Algae Mediterranean Sea Feedback mechanisms Ecosystem ComputingMilieux_MISCELLANEOUS Abiotic component biology Ecology Disturbance regimes 010604 marine biology & hydrobiology Turf Loss of canopy General Medicine Extreme events 15. Life on land biology.organism_classification Seaweed Multiple life traits Pollution [SDE]Environmental Sciences Environmental science Quadrat |
| Zdroj: | Marine Environmental Research Marine Environmental Research, Elsevier science, 2018, 140, pp.342-357. ⟨10.1016/j.marenvres.2018.07.002⟩ |
| ISSN: | 1879-0291 0141-1136 |
| DOI: | 10.1016/j.marenvres.2018.07.002⟩ |
| Popis: | Loss of algal canopies can result in a shift towards a turf-dominated state, where variability in species life-history traits can determine new mechanisms of feedback, and influence the degraded system under variable regimes of disturbance. By focusing on rockpools dominated by Cystoseira brachycarpa, we tested the hypothesis that the alga Dictyopteris polypodioides could take advantage of extreme regimes of disturbance related to storms, and outcompete other turfs through a distinctive combination of life traits. Replacement of the canopy was initially driven by a mix of taxon-specific life-traits and resulting assemblages were susceptible to intense events of disturbance. Subsequently, D. polypodioides dominated removal quadrats, favored by density-dependent abilities to intercept more light and reach larger size than the rest of turf. These new positive feedbacks may contribute to maintain the modified state of the system and influence its ability to withstand extreme abiotic conditions. |
| Databáze: | OpenAIRE |
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