Cernusak, LucasMarshall, JComstock, JBalster, N2015-12-100029-8549http://hdl.handle.net/1885/65290We developed and tested a theoretical model describing carbon isotope discrimination during photosynthesis in tree bark. Bark photosynthesis reduces losses of respired CO2 from the underlying stem. As a consequence, the isotopic composition of source CO2Keywords: bark; carbon isotope; photosynthesis; theoretical study; Monticola; Pinus monticola; Populus tremuloides Carbon isotope discrimination; Corticular photosynthesis; Pinus monticola; Populus tremuloides; Refixation200110.1007/s0044201006292015-12-10