galapagos                package:alr3                R Documentation

_G_a_l_a_p_a_g_o_s _s_p_e_c_i_e_s _d_a_t_a

_D_e_s_c_r_i_p_t_i_o_n:

     Johnson and Raven (1973) have presented data giving the number of
     species and related variables for 29 different islands in the
     Galapagos Archipelago.

_F_o_r_m_a_t:

     This data frame contains the following columns:

     _I_s_l_a_n_d Island name

     _N_S Number of Species

     _E_S Number of endemic species (orrur only on that island)

     _A_r_e_a Surface area of island, hectares

     _A_n_e_a_r Area of closest island, hectares

     _D_i_s_t Distance to closest island, km

     _D_i_s_t_S_C Distance from Santa Cruz Island, km

     _E_l_e_v_a_t_i_o_n Elevation in m, missing values given as zero

     _E_M 1 if elevation is observed, 0 if missing

_S_o_u_r_c_e:

     Johnson, M.P., and Raven, P.H. (1973). Species number and
     endemism: The Galapagos Archipelago revisited. _Science_, 179,
     893-895.

_R_e_f_e_r_e_n_c_e_s:

     Weisberg, S. (2005). _Applied Linear Regression_, 3rd edition. New
     York: Wiley, Problem 10.8.

_E_x_a_m_p_l_e_s:

     data(galapagos)

