TY  - JOUR
AU  - Martín-Sanz, Ruth C.
AU  - San-Martín, Roberto
AU  - Poorter, Hendrik
AU  - Vázquez, Antonio
AU  - Climent, José
TI  - How Does Water Availability Affect the Allocation to Bark in a Mediterranean Conifer?
JO  - Frontiers in Functional Plant Ecology
VL  - 10
SN  - 1664-462X
CY  - Lausanne
PB  - Frontiers Media88991
M1  - FZJ-2019-03960
SP  - 607
PY  - 2019
AB  - Bark thickness is a key structural feature in woody plants in the protection against fire. We used 19 provenances of Pinus halepensis, an obligate-seeder species, in a replicated common garden at two environments contrasting in water availability to assess the interacting effects of site environment and population in the relative allocation to bark, expecting lower allocation at the drier site. Secondly, given the average fire frequency, we analyzed whether trees reached the critical absolute thickness soon enough for population persistence via aerial seed bank. Our analyses indicated that trees at the moister site allocated a rather fixed quantity of resources independent of tree size, and almost all populations reached critical absolute bark thickness to eventually survive fire. In contrast, at the drier site allocation to bark reduced with tree size, and most populations did not reach the critical bark thickness. Populations from areas with higher fire frequency had thicker basal bark, while those from areas with severe droughts and short vegetative periods, had thinner bark. In conclusion, drought-stressed trees have a higher risk to die from fires before achieving reproduction and building a sufficient aerial seed bank.
LB  - PUB:(DE-HGF)16
C6  - pmid:31164894
UR  - <Go to ISI:>//WOS:000468395000001
DO  - DOI:10.3389/fpls.2019.00607
UR  - https://juser.fz-juelich.de/record/864045
ER  -