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- W1584374611 abstract "Understanding seed production patterns and variability is essential for predicting plant regeneration. Both non-adaptive (e.g., resource-tracking) and adaptive (e.g., predatorsatiation) hypotheses have been deemed responsible for variation in seed production. Here we aim to test the role of these two types of hypotheses on acorn production (i.e., number and size of acorns, and annual/biennial production pattern) of cork oak (Quercus suber) in the eastern Iberian peninsula (Spain). Specifically, we tested the following predictions: 1) the number of acorns depends on climatic and weather factors; 2) environmentally-stressed populations have a higher proportion of biennial acorns than non-stressed populations; 3) acorn size is also dependent on resource factors (weather); and 4) monospecific oak patches satiate pre-dispersal predators better than multi-oak species patches. The results suggest that weather variables accounted for approx. 20% of the variability. Models increased the explained variance to 55.4 % if the previous-year production of the tree was introduced. Temporal autocorrelations were related to the number of frost days and droughts suggesting that in northern populations there is a dominance of annual acorns, while in southern ones biennial acorns are more common. Acorn size correlated positively with available water and with spring days below freezing during the current year. Infestation proportion increased in years with low acorn production for both Curculio and Cydia, but only the former correlated positively with the area and proportion of cover by cork oak. We concluded that cork oak populations are highly diverse in all the acorn production parameters studied and that both the resource-matching and the predator-satiation hypotheses seem to be operating." @default.
- W1584374611 created "2016-06-24" @default.
- W1584374611 creator A5003718263 @default.
- W1584374611 date "2009-01-01" @default.
- W1584374611 modified "2023-09-23" @default.
- W1584374611 title "Cork oak regeneration: an approach based on species interactions at landscape scale" @default.
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