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Titolo:
FINE-ROOT PRODUCTION IN SMALL EXPERIMENTAL GAPS IN SUCCESSIONAL MIXEDBOREAL FORESTS
Autore:
CAMPBELL JJ; FINER L; MESSIER C;
Indirizzi:
UNIV QUEBEC,GRP RECH ECOL FORESTIERE,CP 8888 SUCC CTR VILLE MONTREAL PQ H3C 3P8 CANADA UNIV QUEBEC,GRP RECH ECOL FORESTIERE MONTREAL PQ H3C 3P8 CANADA FINNISH RES INST,JOENSUU RES STN FIN-80101 JOENSUU FINLAND
Titolo Testata:
Journal of vegetation science
fascicolo: 4, volume: 9, anno: 1998,
pagine: 537 - 542
SICI:
1100-9233(1998)9:4<537:FPISEG>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
LODGEPOLE PINE FOREST; TROPICAL FOREST; TREEFALL GAPS; CANOPY GAPS; RAIN-FOREST; BIOMASS; DYNAMICS; LIGHT; FIRE; NITROGEN;
Keywords:
BALSAM FIR; EASTERN WHITE CEDAR; ROOT-INGROWTH BAG; TREMBLING ASPEN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
40
Recensione:
Indirizzi per estratti:
Citazione:
J.J. Campbell et al., "FINE-ROOT PRODUCTION IN SMALL EXPERIMENTAL GAPS IN SUCCESSIONAL MIXEDBOREAL FORESTS", Journal of vegetation science, 9(4), 1998, pp. 537-542

Abstract

The effects of small 10 m x 10 m experimental above-ground gaps on fine-root production for the first two years were studied in three fire-initiated stands of the northwestern mixed broad-leaf-conifer boreal forest of Quebec. The 48-yr-old forest is dominated by Populus tremuloides (Trembling aspen), the 122-yr-old forest by a mixture of P. tremuloides, Abies balsamea (balsam fir) and Picea glauca (white spruce), and the 232-yr-old forest by Thuja occidentalis (eastern white cedar) and A. balsamea, with some P. tremuloides. 40 root-ingrowth bags were installed in different locations in and around each gap (at gap center, 1 to 2 m either side of gap edge and in adjacent control plots). Half of the ingrowth bags were harvested after one year following gap creation, the other half after two years. Roots were sorted into different species grouping. Fine-root production was statistically (P < 0.05) larger in the youngest forest compared to the two older ones after one year, but not after two years. The individual species or groups of species increased, decreased or showed no change in fine-root production in gaps, but overall we did not observe a major shift in species proportion between gap and control plots after two years. Some herbs and also Taxus canadensis seemed to benefit in terms of fine-root growth fromsuch small openings after two years. No statistical differences (P > 0.10) in total fine-root production were found among locations within and outside gaps in either year. However, there was a clear tendency for fine-root production to be smaller in gap center than in the other locations for the two younger successional forests the first year after gap creation. We conclude that small above-ground gaps (i.e. < 100 m(2)) do not produce a significant and long-lasting below-ground gap interms of total fine-root production in the successional forests investigated.

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Documento generato il 29/11/20 alle ore 00:35:59