age.range.correlation: no visible global function definition for 'lm'
age.range.correlation : randomization: no visible global function
  definition for 'lm'
anc.clim: no visible binding for global variable 'quantile'
bg.similarity.test: no visible global function definition for
  'sampleRandom'
bg.similarity.test: no visible global function definition for
  'coordinates'
bg.similarity.test: no visible global function definition for 'slot'
bg.similarity.test: no visible global function definition for 'extract'
bg.similarity.test: no visible global function definition for
  'SpatialPoints'
bg.similarity.test : random.presence: no visible global function
  definition for 'sampleRandom'
bg.similarity.test : random.presence: no visible global function
  definition for 'coordinates'
bg.similarity.test : random.presence: no visible global function
  definition for 'slot'
bg.similarity.test: no visible global function definition for
  'write.table'
bg.similarity.test: no visible global function definition for 'unstack'
bg.similarity.test: no visible global function definition for
  'writeRaster'
bg.similarity.test: no visible global function definition for
  'read.asciigrid'
bg.similarity.test: no visible binding for global variable 'quantile'
di.enm: no visible global function definition for 'read.asciigrid'
di.enm: no visible global function definition for 'slot'
import.asc: no visible global function definition for 'read.table'
niche.equivalency.test: no visible global function definition for
  'extract'
niche.equivalency.test: no visible global function definition for
  'SpatialPoints'
niche.equivalency.test: no visible global function definition for
  'sampleRandom'
niche.equivalency.test: no visible global function definition for
  'coordinates'
niche.equivalency.test: no visible global function definition for
  'slot'
niche.equivalency.test: no visible global function definition for
  'write.table'
niche.equivalency.test: no visible global function definition for
  'unstack'
niche.equivalency.test: no visible global function definition for
  'writeRaster'
niche.equivalency.test: no visible global function definition for
  'read.asciigrid'
niche.equivalency.test: no visible binding for global variable 'sd'
niche.equivalency.test: no visible global function definition for
  'pnorm'
niche.overlap: no visible global function definition for
  'read.asciigrid'
plot.ntest: no visible global function definition for 'par'
plot.ntest: no visible global function definition for 'hist'
plot.ntest: no visible global function definition for 'lines'
plot.ntest: no visible global function definition for 'text'
plot.ntest: no visible global function definition for 'title'
plotAncClim : abb: no visible global function definition for 'head'
plotAncClim: no visible global function definition for 'plot'
plotAncClim: no visible global function definition for 'strwidth'
plotAncClim: no visible global function definition for 'rainbow'
plotAncClim: no visible global function definition for 'lines'
plotAncClim: no visible global function definition for 'text'
plotAncClim: no visible global function definition for 'points'
plotAncClim: no visible global function definition for 'strheight'
plotPNO: no visible global function definition for 'rainbow'
plotPNO: no visible global function definition for 'plot'
plotPNO: no visible global function definition for 'lines'
plotPNO: no visible global function definition for 'legend'
pno: no visible global function definition for 'read.table'
Undefined global functions or variables:
  SpatialPoints coordinates extract head hist legend lines lm par plot
  pnorm points quantile rainbow read.asciigrid read.table sampleRandom
  sd slot strheight strwidth text title unstack write.table writeRaster
Consider adding
  importFrom("grDevices", "rainbow")
  importFrom("graphics", "hist", "legend", "lines", "par", "plot",
             "points", "strheight", "strwidth", "text", "title")
  importFrom("methods", "slot")
  importFrom("stats", "lm", "pnorm", "quantile", "sd")
  importFrom("utils", "head", "read.table", "unstack", "write.table")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').