|Title||Global-scale similiarities in nitrogen release patterns during long-term decomposition|
|Publication Type||Journal Article|
|Year of Publication||2007|
|Authors||Parton W, Silver WL, Burke IC, Grassens L, Harmon ME, Currie WS, King JY, E. Adair C, Brandt LA, Hart SC, Fasth B|
|Keywords||article, decomposition, leaf litter, decomposition, root, journal, LIDET, long-term decomposition, nitrogen|
Litter decomposition provides the primary source of mineral nitrogen (N) for biological activity in most terrestrial ecosystems. A 10-year decomposition experiment in 21 sites from seven biomes found that net N release from leaf litter is dominantly driven by the initial tissue N concentration and mass remaining regardless of climate, edaphic conditions, or biota. Arid grasslands exposed to high ultraviolet radiation were an exception, where net N release was insensitive to initial N. Roots released N linearly with decomposition and exhibited little net N immobilization. We suggest that fundamental constraints on decomposer physiologies lead to predictable global-scale patterns in net N release during decomposition.
|Reprint Edition||In File (2/15/2007)|