Memorias de investigación
Artículos en revistas:
Brown trout thermal niche and climate change: expected changes in the distribution of cold-water fish in central Spain
Año:2015
Áreas de investigación
  • Ciencias naturales y ciencias de la salud,
  • Cambio climático,
  • Ecología,
  • Ecología acuática
Datos
Descripción
This paper addresses the determination of the realized thermal niche and the effects of climate change on the range distribution of two brown trout populations inhabiting two streams in the Duero River basin (Iberian Peninsula) at the edge of the natural distribution area of this species. For reaching these goals, new methodological developments were applied to improve reliability of forecasts. Water temperature data were collected using 11 thermographs located along the altitudinal gradient, and they were used to model the relationship between stream temperature and air temperature along the river continuum. Trout abundance was studied using electrofishing at 37 sites to determine the current distribution. The RCP4.5 and RCP8.5 change scenarios adopted by the International Panel of Climate Change for its Fifth Assessment Report were used for simulations and local downscaling in this study. We found more reliable results using the daily mean stream temperature than maximum daily temperature and their respective seven days moving-average to determine the distribution thresholds. Thereby, the observed limits of the summer distribution of brown trout were linked to thresholds between 18.1ºC and 18.7ºC. These temperatures characterise a realised thermal niche narrower than the physiological thermal range. In the most unfavourable climate change scenario, the thermal habitat loss of brown trout increased to 38% (Cega stream) and 11% (Pirón stream) in the upstream direction at the end of the century; however, at the Cega stream, the range reduction could reach 56% due to the effect of a ?warm-window? opening in the piedmont reach.
Internacional
Si
JCR del ISI
Si
Título de la revista
Ecohydrology
ISSN
1936-0584
Factor de impacto JCR
2,634
Información de impacto
Datos JCR del año 2013
Volumen
pendiente
DOI
10.1002/eco.1653
Número de revista
pendiente
Desde la página
1
Hasta la página
15
Mes
SIN MES
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Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Hidrobiología
  • Departamento: Ingeniería y Gestión Forestal y Ambiental
  • Departamento: Sistemas y Recursos Naturales