Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
A new fish assemblage index for indicating river habitat degradation EFI+, 2nd International Statistical Ecology Congress, Canterbury, 2010
Year:2010
Research Areas
  • Hydrology,
  • Zoology
Information
Abstract
The New EFI+ is a multimetric index based on a predictive model that derives reference conditions from abiotic environmental characteristics of individual sites and quantify the derivation between the predicted fish communities in the absence of any human disturbance and the observed fish communities described during a fish sampling occasion. The metrics used are based on species guilds describing the main ecological an biological characteristics of the fish communities. The main objective was to optimize, first, the specificity, capacity of the index to correctly classify an actual undisturbed site as undisturbed and, in a second step, the sensitivity to detect the effects of different pressures on fluvial ecosystems. When applying EFI+ method, the fish assemblage status is determined by two index each one made by two different metrics. This metrics are richness of rheophilic species, abundance of oxygen depletion oxygen, lithologic reproduction species and salmonic smaller than 15 cm. These metrics was chosen out of 58 tested metrics, which reflecting different aspects of fish assemblage structure, selected from the available literature and tested for their potential to indicate habitat degradation. The objective of this poster is to explain the statistical procedure carried out to obtain the EFI+, as well as the methods and criteria applied to select the four final metrics. Finally is shown the error estimations and the limitations in the use of the index
International
Si
Congress
II International Statistical Ecology Congress
960
Place
Kent University, Canterbury
Reviewers
Si
ISBN/ISSN
Start Date
06/07/2010
End Date
09/07/2010
From page
1
To page
1
Second International Statistical Ecology Congress Summary Book
Participants
  • Autor: Joaquin Solana Gutierrez (UPM)
  • Autor: Diego M Garcia de Jalon Lastra (UPM)
  • Autor: Carlos Alonso Gonzalez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Hidrobiología
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