Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Spatial patterns and competition of tree species in a Douglas-fir chronosequence on Vancouver Island
Autor Getzin, S.; Dean, C.; He, F.; Trofymow, J.A.; Wiegand, K.; Wiegand, T.;
Journal / Serie Ecography
Erscheinungsjahr 2006
Department OESA;
Band/Volume 29
Heft 5
Sprache englisch;
Abstract While the successional dynamics and large-scale structure of Douglas-fir forest in the Pacific Northwest region is well studied, the fine-scale spatial characteristics at the stand level are still poorly understood. Here we investigated the fine-scale spatial structure of forest on Vancouver Island, in order to understand how the three dominant species, Douglas-fir, western hemlock, and western redcedar, coexist and partition space along a chronosequence comprised of immature, mature, and old-growth stands. We quantified the changes in spatial distribution and association of the species along the chronosequence using the scale-dependent point pattern analyses pair-correlation function g(r) and Ripley's L-function. Evidence on intra- and inter-specific competition was also inferred from correlations between nearest-neighbor distances and tree size. Our results show that 1) the aggregation of Douglas-fir in old-growth was primarily caused by variation in local site characteristics, 2) only surviving hemlock were more regular than their pre-mortality patterns, a result consistent with strong intra-specific competition, 3) inter-specific competition declined rapidly with stand age due to spatial resource partitioning, and (4) tree death was spatially randomly distributed among larger overstory trees. The study highlights the importance of spatial heterogeneity for the long-term coexistence of shade-intolerant pioneer Douglas-fir and shade-tolerant western hemlock and western redcedar
ID 2634
dauerhafte UFZ-Verlinkung
Getzin, S., Dean, C., He, F., Trofymow, J.A., Wiegand, K., Wiegand, T. (2006):
Spatial patterns and competition of tree species in a Douglas-fir chronosequence on Vancouver Island
Ecography 29 (5), 671 - 682