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Recovery after trampling disturbance in a canopy-forming seaweed population
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Resumo(s)
The recovery of Ascophyllum nodosum, and the
associated benthic community, was followed after repeated
trampling disturbance at different intensities, from 2005 to
2010, at its southern limit (41º41'27'N; 8º55'7''W). The cover of A. nodosum and associated organisms and the
demography of A. nodosum individuals in the most disturbed areas were followed over a recovery period of 54 months. Recovery of A. nodosum assemblages was negatively affected by increasing trampling intensity. After
54 months, the highest intensity plots were still significantly different from control plots. Growth and mortality
rates of A. nodosum increased shortly after disturbance but
progressively recovered to levels close to control plots. The
results of this study demonstrate the sensitivity of this
habitat-building species to human trampling and also show
its plasticity to cope with disturbance events.
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Contexto Educativo
Citação
Rita, A.; Isabel, S.-P.; Serrão, E.A.; Per, A.Recovery after trampling disturbance in a canopy-forming seaweed population, Marine Biology, 159, 3, 697-707, 2012.
Editora
Springer Verlag