Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Towards a holistic indicator of flow disturbance impact: fish community size spectra
Year:2016
Research Areas
  • Biochemical and hydrological cycles,
  • Aquatic ecology
Information
Abstract
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.
International
Si
Congress
International Association for Hydro-Environment Engineering and Research (IAHR)
960
Place
Melbourne, Australia
Reviewers
Si
ISBN/ISSN
978-0-415-62129-8
Start Date
07/02/2016
End Date
12/02/2016
From page
1
To page
4
Webb JA, Costelloe JF, Casas-Mulet R, Lyon JP, Stewardson MJ (eds.) Proceedings of the 11th International Symposium on Ecohydraulics
Participants
  • Autor: Carlos Alonso Gonzalez (UPM)
  • Autor: Javier Herranz
  • Autor: Joaquin Solana Gutierrez (UPM)
  • Autor: Diego M Garcia de Jalon Lastra (UPM)
  • Autor: Richard Noble (Freshwater Fisheries Laboratory Hull International Fisheries Institute, University of Hull, Hull, United Kingdom)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Hidrobiología
  • Departamento: Sistemas y Recursos Naturales
  • Departamento: Ingeniería y Gestión Forestal y Ambiental
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