Towards a holistic indicator of flow disturbance impact: fish community size spectra

Alonso González, Carlos and Herranz, Javier and Solana Gutierrez, Joaquin and Garcia De Jalon Lastra, Diego and Noble, Richard (2016). Towards a holistic indicator of flow disturbance impact: fish community size spectra. In: "11th International Symposium on Ecohydraulics", 12 Feb 2016, Melbourne, Australia. ISBN 978 0 7340 5339 8.

Description

Title: Towards a holistic indicator of flow disturbance impact: fish community size spectra
Author/s:
  • Alonso González, Carlos
  • Herranz, Javier
  • Solana Gutierrez, Joaquin
  • Garcia De Jalon Lastra, Diego
  • Noble, Richard
Item Type: Presentation at Congress or Conference (Article)
Event Title: 11th International Symposium on Ecohydraulics
Event Dates: 12 Feb 2016
Event Location: Melbourne, Australia
Title of Book: Proceedings of the 11th International Symposium on Ecohydraulics. Melbourne, Australia, 7-12 February 2016
Date: 2016
ISBN: 978 0 7340 5339 8
Subjects:
Faculty: E.T.S.I. Montes (UPM)
Department: Sistemas y Recursos Naturales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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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.

Funding Projects

TypeCodeAcronymLeaderTitle
FP7282656REFORMSTICHTING DELTARESREstoring rivers FOR effective catchment Management

More information

Item ID: 46017
DC Identifier: http://oa.upm.es/46017/
OAI Identifier: oai:oa.upm.es:46017
Official URL: http://proceedings.ise2016.org/
Deposited by: Memoria Investigacion
Deposited on: 26 May 2017 15:01
Last Modified: 26 May 2017 15:01
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