Biblio

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Prendergast M., Standen V., Leith I.D., Sheppard L.J..  2009.  Response of enchytraeid worm populations to different forms of nitrogen (ammonia, ammonium, and nitrate) deposition.. Soil Organisms. 81(2):225-236.
Prendergast M., Cole L., Standen V., Rees R., Parker J., Leith I., Sheppard L.J..  2008.  Are enchytraeid worms (Oligochaeta) sensitive indicators of ammonia-N impacts on an ombrotrophic bog? European Journal of Soil Biology. 44(1):101-108.
Pitcairn C.E.R., Fowler D., Leith I.D., Sheppard L.J., Sutton M.A., Kennedy V., Okello E..  2003.  Bioindicators of enhanced nitrogen deposition. Environmental Pollution. 126(3):353-361.
Phuyal M., Artz R.R.E., Sheppard L., Leith I.D., Johnson D..  2008.  Long-term nitrogen deposition increases phosphorus limitation of bryophytes in an ombrotrophic bog. Plant Ecology. 196:111-121.
Phuyal M., Artz R.RE, Sheppard L., Leith I.D, Johnson D..  2008.  Long-term nitrogen deposition increases phosphorus limitation of bryophytes in an ombrotrophic bog. Plant Ecology. 196(1):111-121.
Phoenix G.K., Emmett B.A., Britton A.J., Caporn S.J.M., Dise N.B., Helliwell R., Jones L., Leake J.R., Leith I.D., Sheppard L.J. et al..  2012.  Impacts of atmospheric nitrogen deposition: responses of multiple plant and soil parameters across contrasting ecosystems in long-term field experiments. Global Change Biology. 18(4):1197-1215.
Payne R.J., Jassey V.E.J., Leith I.D., Sheppard L.J., Dise N.B., Gilbert D..  2013.  Ammonia exposure promotes algal biomass in an ombrotrophic peatland. Soil Biology & Biochemistry. 57:936-938.