Nemaspec           package:marelacTeaching           R Documentation

_N_e_m_a_t_o_d_e _s_p_e_c_i_e_s _c_o_m_p_o_s_i_t_i_o_n _o_f _6 _d_e_e_p-_s_e_a _s_e_d_i_m_e_n_t_s _i_n _t_h_e _M_e_d_i_t_e_r_r_a_n_e_a_n

_D_e_s_c_r_i_p_t_i_o_n:

     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 (<1mm long), generally very
     abundant in all aquatic sediments.

_U_s_a_g_e:

     Nemaspec

_F_o_r_m_a_t:

     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)

_N_o_t_e:

     The densities are non-integer values.

     Species are called "Genus spname"; as most species are
     undescribed, they are called "Genus M1", "Genus M2", etc...

_A_u_t_h_o_r(_s):

     Karline Soetaert <k.soetaert@nioo.knaw.nl>

_R_e_f_e_r_e_n_c_e_s:

     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.

_E_x_a_m_p_l_e_s:

     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")

