@article{fdi:010057525,
  title = {{D}o tropical nickel hyperaccumulators mobilize metals into epiphytes ? {A} test using bryophytes from {N}ew {C}aledonia},
  author = {{B}oyd, {R}. {S}. and {W}all, {M}. {A}. and {J}affr{\'e}, {T}anguy},
  editor = {},
  language = {{ENG}},
  abstract = {{H}yperaccumulator plants mobilize large amounts of certain elements from the soil into their tissues. {T}hose elements then may be transferred to other organisms in those communities. {U}sing a humid tropical forest site in {N}ew {C}aledonia, we tested whether epiphytes (mosses and liverworts) growing on {N}i hyperaccumulator hosts contained greater levels of {N}i (and seven other metals) than those growing on non-hyperaccumulator hosts. {W}e selected two {N}i hyperaccumulator species, {P}sychotria douarrei and {H}ybanthus austrocaledonicus, pairing individuals of each species with similar-sized non-hyperaccumulators and collecting epiphytes from each for elemental analysis. {S}amples of epiphytes and host plant leaves were analyzed for concentrations of eight metals ({C}o, {C}r, {F}e, {M}g, {M}n, {N}i, {P}b, and {Z}n). {T}wo-way {ANOVA} was used to assess the influence of host type (hyperaccumulator or non-hyperaccumulator), epiphyte group, and the interaction term. {L}eaves of both {N}i hyperaccumulator species had greater {N}i concentrations than the paired non-hyperaccumulator species, but leaf concentrations of other metals ({C}o, {C}r, {F}e, {P}b, and {Z}n) were higher as well in one or both cases. {T}he strongest influence on epiphyte elemental composition was found to be the host type factor for {N}i. {E}piphytes collected from hyperaccumulator hosts had significantly greater {N}i concentrations than those collected from non-hyperaccumulator hosts. {E}piphyte {N}i concentrations often exceeded the threshold used to define {N}i hyperaccumulation (1000 mu g/g), showing that some epiphytes (in most cases those growing on {N}i hyperaccumulators) also hyperaccumulate {N}i. {S}ix of the epiphytes we analyzed, four liverworts ({F}rullania ramuligera, {S}chistochila sp., {M}orphotype #1 and {M}orphotype $13) and two mosses ({C}alyptothecium sp. and {A}erobryopsis wallichii), had at least one specimen containing more than 1000 mu g {N}i/g and hence qualify as {N}i hyperaccumulators. {W}e conclude that {N}i could move from {N}i hyperaccumulator hosts to their epiphytes, either from leachates/exudates from tissues or from accumulated external dust, thus potentially mobilizing {N}i still further into the food webs of these humid tropical forests.},
  keywords = {},
  booktitle = {},
  journal = {{N}ortheastern {N}aturalist},
  volume = {16},
  numero = {{S}p. {I}ss. 5},
  pages = {139--154},
  ISSN = {1092-6194},
  year = {2009},
  DOI = {10.1656/045.016.0512},
  URL = {https://www.documentation.ird.fr/hor/fdi:010057525},
}