Has nitrogen availability decreased over much of the land surface in the past century? A model-based analysis
Peter M. Vitousek,
Xiaoyu Cen,
Peter M. Groffman
Abstract:A recent publication (Mason et al. in Science 376:261, 2022a) suggested that nitrogen (N) availability has declined as a consequence of multiple ongoing components of anthropogenic global change. This suggestion is controversial, because human alteration of the global N cycle is substantial and has driven much-increased fixation of N globally. We used a simple model that has been validated across a climate gradient in Hawai ‘i to test the possibility of a widespread decline in N availability, the evidence supp… Show more
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