Memorias de investigación
Ponencias en congresos:
Towards a holistic indicator of flow disturbance impact: fish community size spectra
Año:2016
Áreas de investigación
  • Ciclos bioquímicos e hidrológicos,
  • Ecología acuática
Datos
Descripción
Fish size-spectra provide a simple synthetic metric to assess the effects of pressures on the overall function of river ecosystems. An exploration of the effects of hydrological pressures on this metric is addressed in order to test its sensitiveness as a potential holistic indicator of ecological integrity. A set of 652 sampling sites with individual fish length data were used to compare the size-spectra among unimpaired sites and sites only affected by hydrological pressures. The variation of size-spectra along a gradient of rheophily was also considered. Our results show that size spectra slopes are naturally steeper in rheophilic than in limnephilic reaches. According to this, hydrological alterations produce different responses in the fish community size spectra. Hydrologically impaired rheophilic reaches show an increase in the ecological efficiency (size spectra slope) but a decrease in community capacity (elevation of the size spectra), whereas limnephilic reaches experience a decrease in the ecological efficiency but an increase in the food-web capacity (increased elevation of the size spectra). Slight differences in the type of the hydrological alteration (e.g. water abstraction vs. hydropeaking) might explain these effects.
Internacional
Si
Nombre congreso
International Association for Hydro-Environment Engineering and Research (IAHR)
Tipo de participación
960
Lugar del congreso
Melbourne, Australia
Revisores
Si
ISBN o ISSN
978-0-415-62129-8
DOI
Fecha inicio congreso
07/02/2016
Fecha fin congreso
12/02/2016
Desde la página
1
Hasta la página
4
Título de las actas
Webb JA, Costelloe JF, Casas-Mulet R, Lyon JP, Stewardson MJ (eds.) Proceedings of the 11th International Symposium on Ecohydraulics
Esta actividad pertenece a memorias de investigación
Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Hidrobiología
  • Departamento: Sistemas y Recursos Naturales
  • Departamento: Ingeniería y Gestión Forestal y Ambiental