Energy allocation patterns of a sprouting and nonsprouting species of Arctostaphylos in the California chaparral
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Abstract
The r- and K-selection theory was used to generate testable hypotheses about patterns of energy allocation in two chaparral shrubs of different reproductive strategies. Terminal-branchlet vegetative and reproductive biomass of the nonsprouting Arctostaphylos glauca and the sprouting A. glandulosa were sampled in a 23-year-old and a 90-year-old stand of chaparral to test the predictions that: (1) the terminal vegetative growth (g dry weight/m2 of areal coverage) would be equal in the two species, in both stands; (2) oven dry weight (g) of reproductive parts/m2 of areal coverage would be greater in A. glauca than in A. glandulosa in both aged populations; (3) allocation to reproductive parts by the shrubs in the 23-year-old stand would be greater than (or equal to) that of the 90-year-old shrubs. The amount of terminal vegetative growth was equal for both species in the 23-year-old and the 90-year-old stands. There was no statistically significant difference in the weight of fruits produced by the two species in the 23-year-old stand. However, fruit production by A. glauca was significantly greater than by A. glandulosa in the 90-year-old stand. Fruit production was also significantly greater for the older A. glauca shrubs than for those in the 23-year-old stand. The relationships of rainfall pattern and age of shrubs to fruit production are discussed.
Suggested Citation
Keeley, J.E., and Keeley, S.C., 1977, Energy allocation patterns of a sprouting and nonsprouting species of Arctostaphylos in the California chaparral: American Midland Naturalist, v. 98, no. 1, p. 1-10, https://doi.org/10.2307/2424710.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Energy allocation patterns of a sprouting and nonsprouting species of Arctostaphylos in the California chaparral |
| Series title | American Midland Naturalist |
| DOI | 10.2307/2424710 |
| Volume | 98 |
| Issue | 1 |
| Year Published | 1977 |
| Language | English |
| Publisher | University of Notre Dame |
| Contributing office(s) | Western Ecological Research Center |
| Description | 10 p. |
| First page | 1 |
| Last page | 10 |
| Country | United States |
| State | California |
| County | San Diego County |
| Other Geospatial | Lawson Peak |