Horizon / Plein textes La base de ressources documentaires de l'IRD


Publications des scientifiques de l'IRD

Loiseau N., Gaertner J. C., Kulbicki Michel, Merigot B., Legras G., Taquet M., Gaertner-Mazouni Nabila. (2016). Assessing the multicomponent aspect of coral fish diversity : the impact of sampling unit dimensions. Ecological Indicators, 60, 815-823. ISSN 1470-160X

Accès réservé (Intranet IRD) Document en accès réservé (Intranet IRD)

Lien direct chez l'éditeur doi:10.1016/j.ecolind.2015.08.019

Assessing the multicomponent aspect of coral fish diversity : the impact of sampling unit dimensions
Année de publication2016
Type de documentArticle référencé dans le Web of Science WOS:000367407000082
AuteursLoiseau N., Gaertner J. C., Kulbicki Michel, Merigot B., Legras G., Taquet M., Gaertner-Mazouni Nabila.
SourceEcological Indicators, 2016, 60, p. 815-823. ISSN 1470-160X
RésuméThe influence of variations in sampling unit dimensions on the assessment of fish species structuring has been widely documented. However, this issue has been restricted to a very limited range of community and population indices (mainly species richness and density). Here, we have investigated this issue through the analysis of 13 diversity indices related to 3 diversity components (number of species, evenness and functional diversity). We analyzed a large set of 257 standardized underwater visual census (UVC) transects dealing with 254 coral fish species. The sensitivity of the indices to the variation in sampling unit dimensions was studied by comparing a range of 55 couples of transect length and width representing 34 sampling surfaces. We found that the extent and profile of the sensitivity to changes in transect dimensions strongly varied both from one index to another and from one dimension to another (length and width). The most sensitive indices were more strongly impacted by variation in length than width. We also showed that for a fixed transect surface, the couple of chosen length and width may alter the assessment of indices related to each of the three main diversity components studied. Some widely used diversity indices, such as species richness and Shannon index, appeared to be very sensitive to changes in transect length and width. In contrast, while still very little used in coral fish studies, two functional diversity indices (FDiv, FEve), and to a lesser extent an evenness index (Berger-Parker), remained robust in the face of change in sampling dimensions. By showing that the variation in sampling dimensions (length, width and surface) may impact diversity indices in a contrasting manner, we stress the need to take into account the sensitivity of the indices to this criterion in the process of selection of the indices to be analyzed in diversity studies. Finally, we found that 30 m long*5 m wide transects might be a suitable compromise size for assessing the patterns of each of the three major complementary components of coral fish diversity.
Plan de classementEcologie, systèmes aquatiques [036]
LocalisationFonds IRD [F B010066062]
Identifiant IRDfdi:010066062
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010066062

Export des données

Disponibilité des documents

Télechargment fichier PDF téléchargeable

Lien sur le Web lien chez l'éditeur

Accès réservé en accès réservé

HAL en libre accès sur HAL

Accès aux documents originaux :

Accès direct

Bureau du chercheur

Site de la documentation

Espace intranet IST (accès réservé)

Suivi des publications IRD (accès réservé)

Mentions légales

Services Horizon

Poser une question

Consulter l'aide en ligne

Déposer une publication (accès réservé)

S'abonner au flux RSS

Voir les tableaux chronologiques et thématiques

Centres de documentation


Montpellier (centre IRD)

Montpellier (MSE)






La Paz