Table 2.
Parametric correlations between the averaged life history parameters of all the trees in a quadrat and numbers of trees, total basal area, and evenness of the quadrat
| Life history parameter vs. Measure of diversity or crowding | Correlation coefficients r for quadrats having linear dimensions, (in meters)
|
||||
|---|---|---|---|---|---|
| 10 | 20 | 50 | 100 | ||
| Survival | Total number of trees in quadrat | −0.108*** | −0.222*** | −0.152* | −0.016, n.s. |
| Total basal area of trees in quadrat | −0.017, n.s. | −0.066* | +0.101, n.s. | +0.102, n.s. | |
| Evenness | −0.024, n.s. | +0.001, n.s. | −0.037, n.s. | +0.015, n.s. | |
| Recruitment | Total number of trees in quadrat | −0.389*** | −0.339*** | −0.478*** | −0.457*** |
| Total basal area of trees in quadrat | −0.005, n.s. | +0.011, n.s. | +0.094, n.s. | +0.085, n.s. | |
| Evenness | +0.131*** | +0.150*** | +0.154* | +0.178, n.s. | |
| Intrinsic rate of increase | Total number of trees in quadrat | −0.384*** | −0.463*** | −0.521*** | −0.494*** |
| Total basal area of trees in quadrat | +0.002, n.s. | +0.034, n.s. | +0.058, n.s. | +0.056, n.s. | |
| Evenness | +0.135*** | +0.146*** | +0.139* | −0.184, n.s. | |
Evenness is defined in the usual fashion, as the Shannon information index divided by the logarithm of the number of species (28). ∗ and ∗∗∗, significant at the 0.05 and 0.001 levels, respectively.