\HeaderA{Nemaspec}{Nematode species composition of 6 deep-sea sediments in the Mediterranean}{Nemaspec}
\keyword{datasets}{Nemaspec}
\begin{Description}\relax
Dataset of (Soetaert et al., 1991) with nematode species densities in Mediterranean deep-sea sediments, at
depths ranging from 160 m to 1220 m.

The densities are expressed in individuals per 10 cm2.

Nematodes are small free-living worms (\textless{}1mm long), generally very abundant in all aquatic sediments.
\end{Description}
\begin{Usage}
\begin{verbatim}Nemaspec\end{verbatim}
\end{Usage}
\begin{Format}\relax
a data.frame, with stations as columns, species as rows.

There are 6 stations, for each station two replicates.

The stationname refers to the depth of the sediment and the replicate, e.g.
M160b is a station at 160 metres depth, replicate b)
\end{Format}
\begin{Note}\relax
The densities are non-integer values.

Species are called "Genus spname"; as most species are undescribed, they are
called "Genus M1", "Genus M2", etc...
\end{Note}
\begin{Author}\relax
Karline Soetaert \textless{}k.soetaert@nioo.knaw.nl\textgreater{}
\end{Author}
\begin{References}\relax
Soetaert, K., Heip, C. and M. Vincx, 1991. Diversity of nematode assemblages along a
mediterranean deep-sea transect. Marine Ecology Progress Series 75, 275-282.
\end{References}
\begin{Examples}
\begin{ExampleCode}head(Nemaspec)
# select densities of species present in M160b
st160b<-data.frame(Nemaspec$SPECIES,dens=Nemaspec$M160b)
st160b<-st160b[st160b$dens!=0,]

plot(cumsum(rev(sort(st160b$dens)/sum(st160b$dens))),
     main="dominance curve",
     xlab="species rank",ylab="cum freq")
\end{ExampleCode}
\end{Examples}

