RT Journal Article
T1 Effects of Longer Droughts on Holm Oak Quercus ilex L. AcornPests: Consequences for Infestation Rates, Seed Biomass andEmbryo Survival
A1 Canelo, Tara
A1 Gaytán, Álvaro
A1 Pérez-Izquierdo, Carlos
A1 Bonal Andrés, Raúl
AB The effects of climate change on oaks Quercus spp. constitute a main environmental concern for the conservation of temperate forests. In this context, we assessed the consequences of longer droughts on the interactions between the holm oak Quercus ilex L. and its main acorn pests. Infested acorns were prematurely abscised before reaching their potential size. The volume of the acorns attacked by Cydia fagiglandana (Lepidoptera) was smaller than those attacked by Curculio elephas (Coleoptera); however, their weight did not differ because Curculio larvae consumed more cotyledon. For the same reason, embryo survival likelihood was not lower in Cydia acorns despite their smaller size. Delays of late summer rain reduced infestation by Curculio, as soil hardness hampers adult emergence from their underground cells. By contrast, late and scarce precipitations benefited Cydia; rainfall might hamper adult flight and eggs/L1 larvae survival. There was not a “zero-sum” effect, because the decrease of Curculio infestation rates was not fully compensated by an increase of Cydia. Under the longer droughts projected for the Mediterranean Basin, our results predict lower infestation rates and higher acorn survival likelihood. However, further studies including other environmental factors are needed to better forecast the net consequences for holm oak fitness.
PB MDPI
SN Electronic: 1424-2818
YR 2021
FD 2021-03-05
LK https://hdl.handle.net/20.500.14352/8487
UL https://hdl.handle.net/20.500.14352/8487
LA eng
NO Ministerio de Economía y Competitividad (MINECO)/FEDER
NO Gobierno de Extremadura
DS Docta Complutense
RD 30 abr 2025