Establecimiento de cuatro especies de Quercus en el sur de la ...

Spatial and temporal heterogeneity effects on seedling growth and establishment in four Quercus species
Figure 3. (A) Maps of clustering indices (υ) for establishment success (living seedlings seedlings with
respect to dead or non‐emerged plants) in the four species and both studied plots in September. For a
description of patches and gaps, see Fig. 1. (B) Map of covariance between moisture in July and sowing
success on all species in plot 2. The patches represent association zones and the gaps dissociation zones
for the variables, and are bounded by lines if significant at the P < 0.05 level.
There was association between maximum moisture in spring and moisture in
September in plot 2. Regarding Quercus sowing‐related variables, there was
association between emergence of Q. pyrenaica and maximum moisture in spring,
especially in a zone where low moisture levels led to low oak emergence rates. Plot 2
also exhibited association between sowing success in all species at the end of the
summer and moisture in July. In this case, there was an association gap where low
moisture levels corresponded to zones of little or no sowing success (Fig. 3B).
Table 4. Summary of spatial covariance between studied variables. The clustering index and its
significance ( * P < 0.05, ** P < 0.01, *** P < 0.001) for each case are shown. All statistically significant
covariance were positive (i.e. associations).
Variables PLOT 1
Light – Sept. soil moisture 0.28 **
Q. ilex success july ‐ July soil moisture 0.17 *
Q. ilex stem mass ‐ light 0.28 *
PLOT 2
Max. growing season soil moisture – Sept. soil moisture 0.16 *
Light ‐ Herb prodution 0.22 *
Q. pyrenaica emergence – max. growing season soil moisture 0.16 *
Q. pyrenaica July success ‐ herb prodution 0.17 *
All species Sept. success ‐ July soil moisture 0.51 ***
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