The recruitment of the recalcitrant-seeded cryptocarya alba (mol.) looser, established via direct seeding is mainly affected by the seed source and forest cover
Autor
Magni, Carlos R.
Saavedra, Nicole
Espinoza, Sergio E
Yáñez, Marco A
Quiroz, Iván A.
Faúndez, Ángela
Grez, Iván
Martínez-Herrera, Eduardo
Fecha
2022Resumen
Natural regeneration of recalcitrant-seeded tree species is strongly limited in Mediterraneantype climate zones due to increasing droughts imposed by climate change. Direct seeding can be a
low-cost alternative to seedling establishment, but there is still limited information for some species.
This study aimed to assess the effects of the seed source and forest cover on the germination and
survival of the endemic Cryptocarya alba Mol. established through direct seeding. Three habitat types
differing in forest cover were identified within the natural park Reserva Natural Altos de Cantillana,
Metropolitan Region, Chile. The forest cover corresponded to open (canopy density <25%), semidense (canopy density around 50%), and dense forest (canopy density >75%). All forest cover had
C. alba as one of the dominant species. At each habitat type, 38 families from four seed sources
(Cuesta La Dormida (CD), Antumapu (AN), Cantillana (CA, local seed source) and Cayumanque
(CY)) were directly seeded. Germination (Germin) and survival (Surv) were evaluated weekly during
one growing season. There were significant differences between seed sources in Germin and Surv,
with means values varying from 7.8% to 37% for Germin and 0% to 20% for Surv. The local seed
source CA had the highest values in both traits. A significant variation was also observed between
families within seed sources only for Germin. The dense forest cover had the highest Germin (22%)
and Surv (55%) results compared to the other forest cover types, which was partially associated with
differences in soil moisture, temperature, and bulk density. Due to the most frequent droughts in
these Mediterranean-type climate zones, the use of local seeds on dense forest cover is recommended
for the direct seeding of the species in the initial recruitment.
Fuente
Plants, 11(21), 2918Link de Acceso
Click aquí para ver el documentoIdentificador DOI
doi.org/10.3390/plants11212918Colecciones
La publicación tiene asociados los siguientes ficheros de licencia: