Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Response of soil microorganisms to an elevated nitrate input in an open Pinus banksiana - Cladina forest
Autore:
Lamontagne, S; Schiff, SL;
Indirizzi:
Univ Waterloo, Dept Earth Sci, Waterloo, ON N2L 3G1, Canada Univ WaterlooWaterloo ON Canada N2L 3G1 ci, Waterloo, ON N2L 3G1, Canada
Titolo Testata:
FOREST ECOLOGY AND MANAGEMENT
fascicolo: 1-3, volume: 137, anno: 2000,
pagine: 13 - 22
SICI:
0378-1127(20001015)137:1-3<13:ROSMTA>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRECAMBRIAN SHIELD CATCHMENTS; NITROGEN DEPOSITION; HETEROGENEOUS LANDSCAPE; DECOMPOSITION; ECOSYSTEMS; CARBON; MINERALIZATION; SATURATION; SNOWMELT; QUALITY;
Keywords:
boreal forest; nitrogen mineralization; nitrification; nitrogen fertilization;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Lamontagne, S Univ Montreal, Dept Sci Biol, Grp Rech Interuniv Limnol, CP 6128,Succursale Ctr Ville, Montreal, PQ H3C 3J7, Canada Univ Montreal CP 6128,Succursale Ctr Ville Montreal PQ Canada H3C 3J7
Citazione:
S. Lamontagne e S.L. Schiff, "Response of soil microorganisms to an elevated nitrate input in an open Pinus banksiana - Cladina forest", FOREST ECOL, 137(1-3), 2000, pp. 13-22

Abstract

The two communities of the open Pinus banksiana - Cladina forest have contrasting nitrogen (N) cycles. While the 'lichen patches' occurring on bedrock surfaces have high rates of net N mineralization and net nitrification, nearby 'forest islands' have low rates of net N mineralization and no net nitrification. Using buried soil bag incubations, we compared the changes in net N mineralization and net nitrification in forest islands and lichen patches during a short-term experimental addition of N (40 kg N ha(-1) per year as NaNO3) to a small catchment. While in N-amended lichen patches net nitrification increased or remained similar to references, N-amended forest islands had a strong tendency to consume NO3- and produce NH4+. We hypothesize that assimilatory NO3- reduction coupled with a decreased gross NH4+ uptake rare was the combination of mechanisms generating the net conversion of NO3- into NH4+ in forest islands. Observations from the open P. banksiana -Cladina forest suggest that boreal ecosystems may respond in a heterogeneous fashion to anthropogenic N inputs. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 05:33:12