Does spatial distribution of fauna depend on algal belts on intertidal boulder fields of the French Basque coast ?
|Other titles||La distribution spatiale de la faune est elle dépendante des ceintures algales sur les champs de blocs intertidaux de la côte basque?|
|Author(s)||Marticorena Julien1, 2, Huguenin Laura2, 3, Lalanne Yann3, Bru Noelle4, Liquet Benoît4, De Casamajor Marie-Noelle2|
|Affiliation(s)||1 : Université Pierre et Marie Curie PARIS VI, Océanographie et environnements marins. Place Jussieu 75005 Paris, France
2 : IFREMER, Laboratoire Ressources Halieutiques d’Aquitaine, UFR Côte Basque. Parc Montaury, 64600 Anglet, France
3 : UNIV PAU & PAYS ADOUR, UFR Sciences & Techniques Côte Basque, Département d’écologie. Parc Montaury 64600 Anglet, France
4 : UNIV PAU & PAYS ADOUR, Laboratoire de Mathématiques et leurs Applications – UMR CNRS 5142 UFR Côte Basque. Parc Montaury 64600 Anglet, France
|Meeting||ISOBAY 15 - XV International Symposium on Oceanography of the Bay of Biscay. 22-24 June 2016, Bilbao, Spain.|
|Abstract||To determine good ecological status and conservation of the Sub-Marine area of the Bay of Biscay, the implementation of a new rocky intertidal habitats monitoring is needed. A protocol has been adapted from the Brittany protocol for the water body FRFC11 "Basque coast" for the two indicators "intertidal macroalgae" and "subtidal macroalgae" under the Water Framework Directive to qualify the ecological. However no protocol has been validated for fauna in front of meridional characters of the benthic communities. Investigations carried out on macroalgae communities on intertidal area in WFD framework, since 2008, constitute an important working basis. This is the aim of the Bigorno project (Intertidal Biodiversity of the south of the Bay of Biscay and Observation for New search and Monitoring for decision support), financed by the Agency of Marine Protected Areas and the Departmental Council.
To implement knowledge, a sampling protocol has been used in 2015 on the boulder fields of Guéthary. This site is part of Natura 2000 area "rocky Basque coast and offshore extension "It constitutes also a Znieff site and restricted fishing area. The sampling strategy considers the heterogeneity of substrates and the presence of intertidal microhabitats. Two main habitats are present: "mediolittoral rock in exposed area habitat" and "boulder fields". Habitat "intertidal pools and permanent ponds" is also present but, it is not investigated. Sampling effort is of 353 quadrats of 0.1 m², drawn randomly according to a spatially stratified sampling plan, defined by habitat and algal belts. Taxa identification and enumeration are done on each quadrat.
The objective of this work is to expose results from data collected during 2015 sampling program. The importance of characterizing benthic fauna communities spatial distribution belonging to the Basque coast according to algal belts defines during the WDF survey was highlighted. Concurrently, indicators of biodiversity were studied.