4.7 Article

The performance of trait-based indices in an estuarine environment

Journal

ECOLOGICAL INDICATORS
Volume 61, Issue -, Pages 378-389

Publisher

ELSEVIER
DOI: 10.1016/j.ecolind.2015.09.039

Keywords

Species traits; Species diversity; Functional diversity; Functional redundancy; Benthic invertebrates; Environmental disturbance

Funding

  1. FCT (Portuguese National Board of Scientific Research) [SFRH/BD/90530/2012, UID/MAR/04292/2013, SFRH/BPD/41117/2007]
  2. DEVOTES project (DEVelopment Of innovative Tools for understanding marine biodiversity and assessing good Environmental Status) - European Union under the 7th Framework Programme, 'The Ocean of Tomorrow' Theme [308392]
  3. Fundação para a Ciência e a Tecnologia [SFRH/BD/90530/2012, SFRH/BPD/41117/2007] Funding Source: FCT

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The performance of several indices of benthic functioning, based on the traits of estuarine macro-invertebrates, was tested in the lower Mondego estuary (Portugal), whose two arms exhibit different disturbance levels related to hydromorphology. The results showed that some indices responded clearly to this type of disturbance and others not so well. We argue that the community-weighted mean trait values (CWM) in combination with the newly developed SR-FRED index provided the best overall picture of how the benthic communities might have been affected by hydromorphological disturbance. This study also showed that certain indices should be used with caution when dealing with communities with few and dominant species, such as in estuarine environments. (C) 2015 Elsevier Ltd. All rights reserved.

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