Indicator species of intertidal boulder fields on the French Basque coast
|Other titles||Espèces indicatrices des champs de blocs intertidaux sur la côte basque française|
|Author(s)||Lalanne Yann1, Huguenin Laura1, 2, Lissardy Muriel2, Bru Noelle3, D'Amico Franck3, Castège Iker4, Milon Emilie4, de Casamajor Marie-Noelle2|
|Affiliation(s)||1 : UNIV PAU & PAYS ADOUR, UFR Sciences & Techniques Côte Basque, Département d’Ecologie. Parc Montaury 64600 Anglet, France
2 : IFREMER - Laboratoire Ressources Halieutiques Aquitaine. Parc Montaury 64600 Anglet, France
3 : UNIV PAU & PAYS ADOUR, Laboratoire de Mathématiques et de leurs Applications – UMR CNRS 5142 UFR Côte basque. Parc Montaury 64600 Anglet, France
4 : Centre de la Mer de Biarritz, Plateau de l’Atalaye 64200 Biarritz, France
|Meeting||ISOBAY 15 - XV International Symposium on Oceanography of the Bay of Biscay. 22-24 June 2016, Bilbao, Spain.|
|Abstract||The rocky Basque coast presents an interest both in terms of biogeography and its patrimonial situation, alongside its habitats, fauna and flora. The aim of the BIGORNO project (Intertidal Biodiversity of the south of the Bay of Biscay and Observation for New research and Monitoring for decision support), financed by the Agency of Marine Protected Areas (AAMP) and the Departmental Council (CD 64), is to respond to significant deficiencies on biocenosis in the southern marine subregion “Bay of Biscay”. Investigations carried out in the WFD, since 2008, constitute an important basis of work for integration of fauna.
Field studies undertaken since 2015 consisting of a sampling design suited to the substrates heterogeneity and the presence of microhabitats were established on an intertidal area specifically on a "Boulder fields" habitat. Assessment was undertaken by sampling quadrats of 0.1 m² drawn randomly from a spatially stratified sampling plan.
Our study aims for a better understanding of stratification of this habitat and allowed us to highligh tindicator taxa of the "Boulder fields" habitat. Functions included in the package indicspecies (CRAN) were used to conduct indicator species analysis and to assess the significance of the relationship between taxa or taxa combinations and the habitat. It is therefore possible to describe some species or species groups which are specific to boulder fields through the assessment of their functional traits and local biodiversity. These various analyses allow for a sustainable way of monitoring the Basque intertidal rocky shore.