ACKNOWLEDGMENTS
We are grateful to A. Carew for graphic design assistance and
to J. Penuelas, R. Sabo, M. Engardt, and D. Simpson for
providing data. This paper also benefitted from discussions
with J. Brookshire, J. Campbell, C. Cleveland, E. Davidson,
J. Dukes, M. Green, B. Hungate, Y. Luo, B. Poulter, B. Shuman,
C. Terrer, and E. Welti. We appreciate the thoughtful
comments of three anonymous reviewers, whose perspectives
improved this Review.Funding:This work was supported
by the National Socio-Environmental Synthesis Center
(SESYNC) under funding received from the National Science
Foundation (NSF) DBI-1639145 (R.E.M., Q.D.R., and A.J.E.).
Long-term nitrogen studies at the Hubbard Brook Experimental
Forest have been supported by the NSF Long-Term Ecological
Research program since 1988 (P.M.G.). Work on this paper was
also supported, in part, by the US Department of Agriculture,Agricultural Research Service (J.A.); US Department of
Agriculture, Forest Service, Northern Research Station (N.K.L.);
NSF grants 1638688, 1920908, and 832210 (S.V.O.); and RI
Sea Grant (R.W.F.).Competing interests:The authors declare
that they have no competing interests10.1126/science.abh3767Masonet al.,Science 376 , eabh3767 (2022) 15 April 2022 11 of 11
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