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dc.creatorKeyes, C.R.
dc.creatorAcker, S.A.
dc.creatorGreene, S.E.
dc.description.abstractSeedling recruitment in an old growth ponderosa pine (Pinus ponderosa) stand in central Oregon, USA, was studied to determine its relationship with overstorey trees and nearby shrubs, and to identify the spatial patterns resulting from these relationships. Results showed that the influence of adjacent vegetation was greatest among smaller size classes of regeneration. The strongest relationship between overstorey basal area, and germinant and seedling density was observed when calculated at a very local scale (5-m radius). Seedling and germinant densities were also adversely affected by adjacent saplings but were positively associated with shrubs. Spatial analysis revealed significant aggregation of germinants, seedlings and saplings, with the intensity of aggregation decreasing from smaller to larger size classes. These results suggest that regeneration is most sensitive to adjacent vegetation during the early stages, that the facilitative influence of shrubs diminishes relative to their competitive effect once regeneration reaches the sapling stage, and that the early aggregated condition of regeneration gradually transforms towards a more regular pattern as stand development progresses.en_US
dc.publisherWSU Press
dc.rightsIn copyright
dc.subjectnatural regenerationen_US
dc.subjectold growth-forestsen_US
dc.subjectplant competitionen_US
dc.subjectspatial distributionen_US
dc.subjectstand structureen_US
dc.titleOverstory and shrub influences on seedling recruitment patterns in an old-growth ponderosa pine stand
dc.description.citationKeyes et al "Overstory and shrub influences on seedling recruitment patterns in an old-growth ponderosa pine stand." Northwest Science. 2001; 75(3): 204-210

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  • Northwest Science
    Northwest Science features original research in the basic and applied sciences, with emphasis on the Pacific Northwest region of the United States and Canada.

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