Examine the impact of Centrostephanus rodgersii, a range-extending sea urchin, on reef habitat structure and associated biodiversity in Tasmania (Australia)
Type of Study:
Algal communities converged to controls within 2 years of urchin removal. The faunal community of recovered with the seaweeds while the barrens habitat remained overwhelmingly impoverished with only 72 of 296 recorded taxa. C. rodgersii grazing results in an estimated minimum net loss of 150 taxa associated with seawees
Urchin revomal and controls
Bicheno, eastern Tasmania
Response variable :
Species-level percent cover of seaweeds, percent cover of sponges and bryozoans, size frequency of habitat-forming algae, counds of seawee associated fauna sampled destructively.
3 removal, 3 control
Ling S. D. (2008) Range expansion of a habitat-modifying species leads to loss of taxonomic diversity: a new and impoverished reef state. Oecologia 156, 883-94.