Short- and long-term effects of site factors on net N-mineralization and nitrification rates along an urban-rural gradient
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Urban Ecosystems. 5: 159-178.
Long- and short-term effects of urban site factors on net N-mineralization and nitrification rates were investigated in oak stands along an urban-rural land-use transect in the New York City metropolitan area. We used reciprocal transplants of undisturbed soil cores between urban and rural forests to determine the relative importance of long-term effects (mor vs. mull soils, quality of soil organic matter, and deposition of N) vs. shortterm effects (soil temperature) of urban factors in controlling field N-transformation rates along the gradient. In addition, undisturbed soil cores from surface (A, Oe horizons) and subsurface (B horizon) soil were collected from urban, suburban, and rural stands and allowed to incubate in these respective sites to compare the net effect of all urban factors with transplanted-core results.
KeywordsN-mineralization; nitrification; earthworms; exotic species; forests; buried bags; soil organic matter; urban
Pouyat, Richard V. 2001. Short- and long-term effects of site factors on net N-mineralization and nitrification rates along an urban-rural gradient. Urban Ecosystems. 5: 159-178.