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| Leruste, A.; Villeger, S.; Malet, Nathalie; De Wit, R.; Bec, B.. |
| We used the individual-based multidimensional functional diversity and the taxonomic approaches in a complementary way to describe phytoplankton communities in three coastal lagoons with different eutrophication status in the South of France. We sampled communities during three seasons, i.e., in autumn, spring, and summer. Using classical taxonomy, 107 taxa/morphotypes were identified in the nine communities. The individual-based functional approach allowed grouping these individuals into 20 functional entities according to their values for 5 traits related to trophic adaptations (cell size, mobility, trophic regime, coloniality, and pelagic/benthic life). Some species (e.g., Prorocentrum micans) emerged in multiple functional entities, showing the... |
| Tipo: Text |
Palavras-chave: Classification; Functional entity; Functional traits; Taxonomic diversity. |
| Ano: 2018 |
URL: http://archimer.ifremer.fr/doc/00433/54454/55826.pdf |
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| Toussaint, A.; Charpin, N.; Brosse, S.; Villeger, S.. |
| Worldwide biodiversity assessments have mainly focused on species richness but little is known about the diversity of species roles, i.e. functional diversity, while this is a key facet to understanding the consequences of global changes on the ecosystem services to human societies. Here, we report the world pattern of functional diversity of freshwater fish using a database encompassing morphological characteristics of more than 9,000 species. The Neotropical realm hosts more than 75% of global functional diversity while other realms each host less than 25%. This discrepancy is mediated by high functional uniqueness in some diversified Neotropical fish orders. Surprisingly, functional diversity patterns were weakly related to functional vulnerability. In... |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00324/43503/74440.pdf |
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| Sagouis, A.; Cucherousset, J.; Villeger, S.; Santoul, F.; Bouletreau, S.. |
| Multiple anthropogenic pressures including the widespread introductions of non-native species threaten biodiversity and ecosystem functioning notably by modifying the trophic structure of communities. Here, we provided a global evaluation of the impacts of non-native species on the isotopic structure (C-13 and N-15) of freshwater fish communities. We gathered the stable isotope values (n = 4030) of fish species in 496 fish communities in lentic (lakes, backwaters, reservoirs) and lotic (running waters such as streams, rivers) ecosystems throughout the world and quantified the isotopic structure of communities. Overall, we found that communities containing non-native species had a different isotopic structure than communities without non-native species.... |
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| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00611/72324/71130.pdf |
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