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Titolo:
Dynamic steady state of patch-mosaic tree size structure of a mixed dipterocarp forest regulated by local crowding
Autore:
Kohyama, T; Suzuki, E; Partomihardjo, T; Yamada, T;
Indirizzi:
Harvard Univ Herbaria, Cambridge, MA 02138 USA Harvard Univ Herbaria Cambridge MA USA 02138 ria, Cambridge, MA 02138 USA Kagoshima Univ, Fac Sci, Kagoshima 8900065, Japan Kagoshima Univ Kagoshima Japan 8900065 Fac Sci, Kagoshima 8900065, Japan Indonesian Inst Sci, Res & Dev Ctr Biol, Bogor 16122, Indonesia IndonesianInst Sci Bogor Indonesia 16122 r Biol, Bogor 16122, Indonesia Prefectural Univ Kumamoto, Fac Environm & Symbiot Sci, Kumamoto 862, JapanPrefectural Univ Kumamoto Kumamoto Japan 862 ot Sci, Kumamoto 862, Japan
Titolo Testata:
ECOLOGICAL RESEARCH
fascicolo: 1, volume: 16, anno: 2001,
pagine: 85 - 98
SICI:
0912-3814(200103)16:1<85:DSSOPT>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
INDIVIDUAL-BASED MODEL; RAIN-FORESTS; DWARF BAMBOO; SIMULATION; GROWTH; COEXISTENCE; CONIFERS; STANDS; BORNEO;
Keywords:
advanced regeneration; gap mosaic; landscape; model; patch age; tropical rainforest;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Kohyama, T Hokkaido Univ, Grad Sch Environm Earth Sci, Sapporo, Hokkaido 0600810, Japan Hokkaido Univ Sapporo Hokkaido Japan 0600810 do 0600810, Japan
Citazione:
T. Kohyama et al., "Dynamic steady state of patch-mosaic tree size structure of a mixed dipterocarp forest regulated by local crowding", ECOL RES, 16(1), 2001, pp. 85-98

Abstract

A patch age- and tree size-structured simulator was applied to demonstratethe landscape dynamics of a lowland mixed dipterocarp forest, using censusdata over a 3 year interval from two 1 ha plots in northern West Kalimantan, Indonesia (Western Borneo). Tree growth rate and recruitment rate were estimated as functions of tree size and local crowding. The effect of local crowding was assumed to be one-sided through light competition, where the basal area for all trees larger than a target tree inside the circle of 10 mradius around the target was employed as the index of crowding. Estimated parameters were similar between the two plots. Tree mortality was expressedby descending function of tree size with asymptotic mortality for large trees corresponding to the gap formation rate. One parameter specifying the survival of trees at gap formation, which was required for the landscape-level simulation of a shifting-gap mosaic, was left undetermined from plot census data. Through simulation, this parameter was estimated so as to best fit the observed among-patch variation in terms of local basal area. The overall time course of simulation and tree size structure were not sensitive tothis parameter, suggesting that one-sided competition along the vertical forest profile is a stronger determinant of average forest structure than among-patch horizontal heterogeneity in this forest. Simulated dynamic steadystate successfully reproduced the observed forest architecture in the gap-dynamic landscape. It took about 400 years for a vacant landscape to be replaced by a steady-state architecture of forest. Sensitivity analysis suggests that steady-state basal area and biomass are most sensitive to changing gap formation rate and intrinsic size growth rate.

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Documento generato il 19/09/20 alle ore 18:46:14