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Spatial and temporal variability on deep-water algal assemblages in the Northwestern Mediterranean: insights into the effects of an exceptional storm.

AuthorsNavarro, Laura ; Ballesteros, Enric ; Linares, Cristina ; Hereu, Bernat
KeywordsPopulation structure
Deep-water algae
Catastrophic event
Issue Date2011
CitationEstuarine, Coastal and Shelf Science 95: 52-58 (2011)
AbstractThere are deep-water populations of the endemic and threatened Mediterranean brown alga Cystoseira zosteroides in the Medes Islands Marine Reserve (NW Mediterranean). Here, the distribution, population structure, individual growth, mortality and recruitment rates of this species over two years are described in relation to the effects of an exceptionalstorm. We found a high spatialvariability in the structure and dynamics of C. zosteroides populations at small geographical scales, suggesting that environmental factors acting at the population level display a key role in population size structure, mortality and recruitment. The elevated mortality rates recorded at some locations (almost 80%) is amongst the highest recorded for perennial algae as a consequence of a single storm, emphasizing the importance of episodic catastrophic events in the maintenance of these deep-water, slow-growing populations. These findings are of particular importance not only to fully understand the ecology of C. zosteroides, but also for its conservation.
Description7 páginas, 3 tablas, 2 figuras.
Publisher version (URL)http://dx.doi.org/10.1016/j.ecss.2011.08.002
Appears in Collections:(CEAB) Artículos
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