@article {PIE381,
	title = {Global environmental change and the nature of aboveground net primary productivity responses: insights from long-term experiments},
	journal = {Oecologia},
	year = {2015},
	note = {PI Synthesis},
	keywords = {aboveground productivuty, disturbance, hierarchial respopnse framework, long-term ecological research network, LTER-PIE, nutrient addition, precipitation manipulation, primary production},
	doi = {10.1007/s00442-015-3230-9},
	author = {Smith, M.D. and La Pierre, K.J. and Collins, S.L. and Knapp, A.K. and Gross, K.L. and Barrett, J.E. and Frey, S.D. and Gough, L. and Miller, R.J. and Morris, J.T. and Rustad, L.E. and Yarie, J.}
}
@book {PIE357,
	title = {Long-Term Trends in Ecological Systems: A Basis for Understanding Responses to Global Change. },
	volume = {Technical Bulletin Number 1931},
	year = {2013},
	note = {PI Plum Data},
	pages = {396},
	publisher = {National Technical Information Services},
	organization = {National Technical Information Services},
	address = {Springfield, Virginia},
	keywords = {disturbance, inorganic nutrients, LTER-PIE, organic matter, population dynamics, primary production},
	author = {Peters, D.P.C. and Laney, C.M. and Lugo, A.E. and Collins, S.L. and Driscoll, C.T. and Groffman, P.M. and Grove, J.M. and Knapp, A.K. and JKratz, T.K. and Ohman, M.D. and Waide, R.B. and Yao, J.}
}
