Spatial distribution of regeneration patches in an old-growth Pinus jeffreyi-mixed conifer forest in northwestern Mexico
作者： S.L. Stephens , D.L. Fry
DOI: 10.1658/1100-9233(2005)016[0693:SDORPI]2.0.CO;2
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摘要: Abstract Question: What are the shape, abundance, size, and structural characteristics of sapling patches in an old-growth Pinus jeffreyi-mixed conifer forest with a relatively intact disturbance regime? Location: Sierra San Pedro Martir, Baja California, Mexico. Methods: Regeneration was quantified by sampling on seven 1200 m permanently marked line transects. For all intersected, tree species, age, patch canopy cover were recorded. Patch statistically compared to data from unbiased inventory plots. The minimum regeneration defined as three saplings 49-m2 area. Results: We sampled 54 patches. size varied 6.6 674.8 m2. A small portion (patch fraction = 3.8%, abundance 8.5 per ha). majority small; 64.8% less than mean area 100.1 Patches shaped rhombus. characteristics, value...
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