Influence of provenance origin on the early performance of two sclerophyllous Mediterranean species established in burned drylands
Abstract
Forest restoration have had limited success due to intense and prolonged droughts in Mediterraneantype
ecosystems. In this context, knowledge of growth and physiology in seedlings of different
provenances can be useful in the selection of appropriate seed sources for restoration. In this study
we investigated variations in survival, growth, and leaf-level physiology of five provenances of
Quillaja saponaria Mol. and five provenances of Cryptocarya alba Mol. originated from coastal and
Pre Andean sites exhibiting latitudinal-related climate differences in central Chile. Seedlings were
grown in a nursery on 600 mL pots for 18 months and then planted in a dryland site severely damaged
by fire. One year after establishment, we measured survival, growth, and leaf-level physiology. We
also analyzed the relationship between outplanting survival with seedling characteristics prior to
planting, and the relationship between growth and survival with physiological traits and with climate
variables. Growth and survival were similar among provenances of Q. saponaria and C. alba, with
the exception of differing heights observed within the provenance of Q. saponaria. Initial root collar
diameter of Q. saponaria was observed to be positively correlated to outplanting survival. With the
exception of photosynthesis in Q. saponaria, all provenances of both species differed in the leaflevel
physiological traits. Those provenances originating from interior dryland sites exhibited lower
stomatal conductance and used water more efficiently. The opposite was true for provenances coming
from coastal sites. In outplanting sites with Mediterranean-type climates that have been damage by
severe fire, selections based on larger diameter seedlings, especially for Q. saponaria and from interior
and pre-Andean provenances, will likely improve outplanting success.
Materias
Oak quercus-ilexField performance
Quillaja-saponaria
Stock quality
Water-balance
Seedlings
Forest
Restoration
Container
Drought
Origen
Scientific Reports (2021) 11:621210.1038/s41598-021-85599-3
https://repositorio.uchile.cl/handle/2250/183161
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