@article {1888,
	title = {Key herbivores reveal limited functional redundancy on inshore coral reefs},
	journal = {Coral Reefs},
	year = {2013},
	month = {04/2013},
	abstract = {Marine ecosystems are facing increasing
exposure to a range of stressors and declines in critical
ecological functions. The likelihood of further loss of
functions and resilience is dependent, in part, on the extent
of functional redundancy (i.e. the capacity of one species to
functionally compensate for the loss of another species)
within critical functional groups. We used multiple metrics;
species richness, generic richness, abundance and
reserve capacity (i.e. the relative number of individuals
available to fulfil the function if the numerically dominant
species is lost), as indicators to assess the potential functional
redundancy of four functional groups of herbivorous
fishes (browsers, excavators, grazers and scrapers) in two
of the worlds{\textquoteright} most intact coral reef ecosystems: the Great
Barrier Reef (GBR) and Ningaloo Reef in Western Australia.
We found marked variations in potential redundancy
among habitats within each reef system and functional
groups. Despite negligible fishing of herbivorous fishes,
coastal habitats in both reef systems had lower functional
redundancy compared to offshore locations for all herbivorous
fishes collectively and the four functional groups
independently. This pattern was consistent in all four
indicators of redundancy. The potential vulnerability of
these coastal habitats is highlighted by recent shifts from
coral to macroalgal dominance on several coastal reefs of
the GBR. Our approach provides a simple yet revealing
evaluation of potential functional redundancy. Moreover, it
highlights the spatial variation in potential vulnerability
and resilience of reef systems.},
	keywords = { Resilience,  Response diversity,  Species richness, Functional redundancy, Functional groups, Great Barrier Reef, Herbivores, Ningaloo},
	issn = {1432-0975},
	doi = {10.1007/s00338-013-1044-y},
	url = {http://link.springer.com/article/10.1007\%2Fs00338-013-1044-y},
	author = {Johansson, CL and Leemput, I. A. and Depczynski, M and Hoey, AS and Bellwood, DR}
}
