saunders
) together with a Boolean flag indicating
whether the holdfast was in a sheltered or exposed location. Also two
data frames, one for the 20 exposed holdfasts (saunders.exposed
)
and one for the 20 sheltered holdfasts (saunders.sheltered
). Also three count
objects, giving counts for all organisms
(saunders.tot
), all those from exposed locations
(saunders.exposed.tot
), and all those from sheltered locations
only (saunders.sheltered.tot
).
data(saunders)
saunders
is a data frame with 40 observations on 177
variables. The observations (rows) are 40 holdfasts and the variables
are, with the exception of the first one, the numbers of each of 176
species living there. The first variable is a Boolean, indicating
whether or not that holdfast was exposed (TRUE
) or sheltered
(FALSE
).
Summary datasets saunders
, saunders.exposed
, and
saunders.sheltered
are objects of class count
that
are the species abundance for sheltered holdfasts, exposed
holdfasts, and the entire dataset.The data was collected in New Zealand, from eight sites along the Leigh coastline from north of Leigh Harbour down to the southern end of Kawau Island (a stretch of roughly 20 km). Four sites were wave-exposed, four were sheltered (although two of the latter were arguably quite tidally-dominated). Each site had a spatial extent of roughly one hectare. They were collected from 5 - 10 November, 2003
extractor
data(saunders)
plot(saunders.sheltered.tot, uncertainty=TRUE, n=1)
preston(saunders.tot)
plot(extant(extractor(saunders,1)))
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