The performance of trait-based indices in an estuarine environment |
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| Affiliation: | 1. Åbo Akademi University, Department of Biosciences, Environmental and Marine Biology, Artillerigatan 6, FI-20520 Turku, Finland;2. Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory, Pakefield Road, Lowestoft, Suffolk NR33 0HT, United Kingdom;3. Hafok AB, SE-179 61 Stenhamra, Sweden;4. Department of Bioscience, Aarhus University, 4000 Roskilde, Denmark;5. National Marine Fisheries Research Institute, Kołłataja 1, 81-332 Gdynia, Poland;1. M. V. Lomonosov Moscow State University, Faculty of Biology, Leninskie Gory 1/12, 119234 Moscow, Russia;2. P. P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Nakhimovsky Prospect 36, 117997 Moscow, Russia |
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| Abstract: | 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. |
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| Keywords: | Species traits Species diversity Functional diversity Functional redundancy Benthic invertebrates Environmental disturbance |
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