02108nas a2200193   4500008004100000245007500041210006900116300001300185490000700198520154100205653001601746653001501762653002201777100001901799700001901818700002001837700001701857856004001874       1996                        eng d00aInterspecific nutrient transfer in a tallgrass prairie plant community0 aInterspecific nutrient transfer in a tallgrass prairie plant com  a180 -1840 v833 aInterplant nutrient transfer may be an important ecological process in grasslands, and may significantly influence plant neighborhood interactions. We investigated the potential for phosphorus transfer between the dominant grass Andropogon gerardii and several neighboring plant species in tallgrass prairie via a field 32PO4 labelling experiment. The mean amount of 32P received from donor shoots differed significantly among neighboring species and decreased with increasing distance from the donor. In general, forbs and cool-season C3 grasses received more labelled 32P than warm-season C4 grasses. Phosphorus transfer occurred over distances up to 0.5 m. The effects of species and distance on movement of phosphorus changed with increasing time after labelling. The relative mass of receiver and donor shoots did not affect amounts of 32P transfer. A benomyl fungicide treatment, applied to suppress mycorrhizal activity, likely did not affect existing vegetative hyphae and did not affect the amount of 32P transferred. These studies demonstrate that: (1) phosphorus is transferred among neighboring species in tallgrass prairie plant communities, (2) phosphorus may be transferred over significantly greater distances than reported in other grasslands, and (3) there is differential transfer among co-occurring species. Hypothesized mechanisms accounting for these patterns in tallgrass prairie include mycorrhizal hyphal interconnections and/or extensive and differential root and rhizosphere overlap among neighboring species.10amycorrhizae10aPhosphorus10atallgrass prairie1 aWalter, L.E.F.1 aHartnett, D.C.1 aHetrick, B.A.D.1 aSchwab, A.P.  uhttp://www.jstor.org/stable/2445936