J
John D. Aber
Researcher at University of New Hampshire
Publications - 207
Citations - 50680
John D. Aber is an academic researcher from University of New Hampshire. The author has contributed to research in topics: Forest ecology & Forest floor. The author has an hindex of 107, co-authored 204 publications receiving 48500 citations. Previous affiliations of John D. Aber include Durham University & Oak Ridge National Laboratory.
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Journal ArticleDOI
Human alteration of the global nitrogen cycle: sources and consequences
Peter M. Vitousek,John D. Aber,Robert W. Howarth,Gene E. Likens,Pamela A. Matson,David W. Schindler,William H. Schlesinger,David Tilman +7 more
TL;DR: In this article, a review of available scientific evidence shows that human alterations of the nitrogen cycle have approximately doubled the rate of nitrogen input into the terrestrial nitrogen cycle, with these rates still increasing; increased concentrations of the potent greenhouse gas N 2O globally, and increased concentration of other oxides of nitrogen that drive the formation of photochemical smog over large regions of Earth.
Journal ArticleDOI
The Nitrogen Cascade
James N. Galloway,John D. Aber,Jan Willem Erisman,Sybil P. Seitzinger,Robert W. Howarth,Ellis B. Cowling,B. Jack Cosby +6 more
TL;DR: The only way to eliminate Nr accumulation and stop the cascade is to convert Nr back to nonreactive N2, which leads to lag times in the continuation of the cascade.
Journal ArticleDOI
Nitrogen and Lignin Control of Hardwood Leaf Litter Decomposition Dynamics
TL;DR: The effects of initial nitrogen and lignin contents of six species of hardwood leaves on their decomposition dynamics were studied at the Hubbard Brook Experimental Forest by inverse linear relationships between the percentage of original mass remaining and the nitrogen concentration in the residual material.
Journal ArticleDOI
Nitrogen saturation in northern forest ecosystems
TL;DR: In this article, the authors describe ways in which excess nitrogen from fossil fuel combustion may stress the biosphere, and the complexity of these effects on water quality and on forest nutrition is discussed.
Journal ArticleDOI
Nitrogen Saturation in Temperate Forest Ecosystems
John D. Aber,William H. McDowell,Knute J. Nadelhoffer,Alison H. Magill,G. M. Berntson,Mark Kamakea,Steven G. McNulty,William S. Currie,Lindsey E. Rustad,Ivan J. Fernandez +9 more
TL;DR: In the US, nitrogen deposition remains relatively constant in the northeastern United States and is increasing in the Southeast and the West (Fenn et al. as mentioned in this paper, 2003), while acid acid deposition is increasing.