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Titolo:
The contribution of coarse woody debris to carbon, nitrogen, and phosphorus cycles in three Rocky Mountain coniferous forests
Autore:
Laiho, R; Prescott, CE;
Indirizzi:
Univ British Columbia, Dept Forest Sci, Vancouver, BC V6T 1Z4, Canada UnivBritish Columbia Vancouver BC Canada V6T 1Z4 ver, BC V6T 1Z4, Canada Univ Helsinki, Dept Forest Ecol, FIN-00014 Helsinki, Finland Univ Helsinki Helsinki Finland FIN-00014 ol, FIN-00014 Helsinki, Finland
Titolo Testata:
CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE
fascicolo: 10, volume: 29, anno: 1999,
pagine: 1592 - 1603
SICI:
0045-5067(199910)29:10<1592:TCOCWD>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
DOUGLAS-FIR LOGS; LODGEPOLE PINE FORESTS; MYCELIAL CORD SYSTEMS; NUTRIENT CONTENT; VANCOUVER-ISLAND; WESTERN HEMLOCK; NATIONAL-PARK; DECOMPOSITION; OREGON; DECAY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
42
Recensione:
Indirizzi per estratti:
Indirizzo: Prescott, CE Univ British Columbia, Dept Forest Sci, 3037-2424 Main Mall, Vancouver, BCV6T 1Z4, Canada Univ British Columbia 3037-2424 Main Mall Vancouver BC Canada V6T 1Z4
Citazione:
R. Laiho e C.E. Prescott, "The contribution of coarse woody debris to carbon, nitrogen, and phosphorus cycles in three Rocky Mountain coniferous forests", CAN J FORES, 29(10), 1999, pp. 1592-1603

Abstract

The contribution of coarse woody debris to C, N, and P cycles was assessedin forests of lodgepole pine (Pinus contorta Dougl. ex Loud.), white spruce (Picea glauca (Moench Voss), and subalpine fir (Abies lasiocarpa (Hook. ) Nutt.) - Engelmann spruce (Picea engelmannii Parry ex Engelm.) in southwestern Alberta. Mass loss and changes in C, N, and P concentrations in decomposing log segments were measured for 14 years. Litter input was measured during 10 years for coarse woody debris, 1 year for ground vegetation, and 5 years for other aboveground litter types. Release of C, N and P from decomposing litter were simulated for a period of 40 years. After 14 years, log segments of pine, spruce, and fir had lost on average 71, 38, and 40%, respectively, of their dry mass. The N content of the pine logs increased, sprucechanged little, and fir lost N. Phosphorus accumulated in all logs. The greatest imports of N and P occurred at the pine sites and fir sites, respectively, where these nutrients were the least available, indicating that wooddecay organisms may compete with vegetation for limiting nutrients in these forests. Coarse woody debris comprised 3-24% of aboveground litter and contributed less than 5% of the N and P released. Coarse woody debris does not appear to make a significant contribution to N and P cycling in these forests.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 09:27:56