@article {PIE120,
	title = {Isotopic investigation of nitrogen retention in a riparian ecosystem.},
	journal = {Journal of Applied Ecology},
	volume = {40},
	number = {6},
	year = {2004},
	note = {PI Plum Data},
	pages = {1035-1048},
	keywords = {isotopes, LTER-PIE, nitrogen, riparian},
	doi = {10.1111/j.1365-2664.2003.00854.x},
	author = {Clement, J. and Holmes, R.M. and Peterson, B.J. and Pinlay, G.}
}
@article {PIE38,
	title = {Nitrogen flow through the food web in the oligohaline zone of a New England estuary.},
	journal = {Ecology},
	volume = {81},
	year = {2000},
	note = {PD Plum Data},
	pages = {433-452},
	keywords = {15N-tracer, Actinocyclus normanii, benthivore, copepod, detritus, diatoms, disturbance, food web, inorganic nutrients, intertidal, LTER-PIE, macrofauna, nitrogen, oligohaline zone, planktivore, population dynamics, primary production},
	doi = {10.2307/177438},
	author = {Hughes, J. E. and Deegan, L.A. and Peterson, B.J. and Holmes, R.M. and Fry, B.}
}
@article {PIE3,
	title = {Measuring 15N-NH4 in marine, estuarine, and freshwaters: an adaptation of the ammonium diffusion method for samples with low ammonium concentrations.},
	journal = {Marine Chemistry},
	volume = {60},
	year = {1998},
	note = {PI Coastal},
	pages = {235-243},
	keywords = {ammonium, analytical methods, diffusion, estuarine, fresh water, inorganic nutrients, N-15, PIE LMER, sea water},
	doi = {10.1016/S0304-4203(97)00099-6},
	author = {Holmes, R.M. and McClelland, J. and Sigman, D.M. and Fry, B. and Peterson, B.J.}
}
