@misc{10481/99184,
year = {2024},
month = {11},
url = {https://hdl.handle.net/10481/99184},
abstract = {Species distributed across wide elevational gradients are likely to experience
local thermal adaptation and exhibit high thermal plasticity, as these gradients are characterised
by steep environmental changes over short geographic distances (i.e., strong selection
differentials). The prevalence of adaptive intraspecific variation in thermal tolerance
with elevation remains unclear, however, particularly in freshwater taxa.We explored
variation in upper and lower thermal limits and acclimation capacity among Iberian populations
of adults of the widespread water beetle Agabus bipustulatus (Dytiscidae) across
a 2000 m elevational gradient, from lowland to alpine areas. Since mean and extreme
temperatures decline with elevation, we predicted that populations at higher elevations
will show lower heat tolerance and higher cold tolerance than lowland ones. We also explored
whether acclimation capacity is positively related with climatic variability across
elevations. We found significant variation in thermal limits between populations of A. bipustulatus,
but no evidence of local adaptation to different thermal conditions across the
altitudinal gradient, as relationships between thermal limits and elevation or climatic variables
were largely nonsignificant. Furthermore, plasticities of both upper and lower thermal
limits were consistently low in all populations. These results suggest thermal niche
conservatism in this species, likely due to gene flow counteracting the effects of divergent
selection, or adaptations in other traits that buffer exposure to climate extremes. The
limited adaptive potential and plasticity of thermal tolerance observed in A. bipustulatus
suggest that even generalist species, distributed across wide environmental gradients, may
have limited resilience to global warming.},
organization = {R&D project id.
PID2019-108895GB-I00, funded by MCIN/AEI/
10.13039/501100011033 and VI PPIT Universidad
de Sevilla (IV.7 Ayuda Suplementaria a Grupos de Investigación
por captación de fondos en las convocatorias de
proyectos de investigación del Plan Estatal; 2020/1110)},
organization = {Postdoctoral contract from
the “Consejería de Economía, Conocimiento, Empresas
y Universidad de la Junta de Andalucía-Fondo Social
Europeo de Andalucía 2014–2020” (“Talento Doctores,
PAIDI program”)},
organization = {Postdoctoral
contract from the “María Zambrano” program, by the
Spanish “Ministerio de Universidades” (funded by European
Union - NextGenerationEU)},
publisher = {Wiley Online Library},
keywords = {acclimation response ratios},
keywords = {climate extremes hypothesis},
keywords = {climatic variability hypothesis},
title = {Intraspecific variation of thermal tolerance along elevational gradients: the case of a widespread diving beetle (Coleoptera: Dytiscidae)},
doi = {10.1111/1744-7917.13466},
author = {Pallarés, Susana and Carbonell, José Antonio and Picazo Mota, Félix and T. Bilton, David and Millán, Andrés and Abellán, Pedro},
}