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    Author(s): Thomas M. Schuler; Frederick W. Smith
    Date: 1988
    Source: Forest Ecology and Management. 25: 211-220.
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: View PDF  (553.98 KB)

    Description

    The effects of species mix on stand structure and growth are evaluated for 117 pinyon (Pinus edulis Engelm.) and juniper (Juniperus monosperma (Engelm.) Sarg and J. osteosperma (Torr.) Little) woodlands of the southwestern United States. Maximum-size/density relations, leaf area and growth of pure and mixed-species woodlands are compared. Structure of pure and mixed-species woodlands appeared to be restricted by maximum-size/density relations. Maximum Stand Density Index (SDI) for mixed-species woodlands was 30% greater than for pure woodlands. Ceiling leaf areas were 3.6 for mixed-species, 3.5 for pure pinyon and 1.0 for pure juniper woodlands. Ceiling leaf area varied with species mix and soil type. Highest growth of mixed-species woodlands occurred at maximum woodland and pinyon SDL We suggest that higher size/density, leaf area and growth relations in mixed-species woodlands than in pure woodlands are related to differences in rooting habit and water relations between pinyon and juniper.

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    Citation

    Schuler, Thomas M.; Smith, Frederick W. 1988. Effect of species mix on size/density and leaf-area relations in the southwest pinyon/juniper woodlands. Forest Ecology and Management. 25: 211-220.

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