Publication details.


Author(s):Sardu, Sandro; Cabanellas-Reboredo, M.; Alós, J.; Deudero, S.; Hendriks, I.; Álvarez, E.;
Title:Recruitment preferences of a bivalve community: Results from artificial collectors over Posidonia oceanica (L.) Delile meadows in a Marine Protected Area (MPA)
Book title:Seagrass: Ecology, Uses and Threats
Editorial:Robert S. Pirog

We assessed recruitment behavior of the bivalve community associated to Posidonia oceanica meadows in the Marine Protected Area (MPA) of Palma bay (Majorca, Western Mediterranean). Recruitment is a process that plays a key role in population dynamics and in community structure, but has been mainly studied for bivalves with economic value only while our study evaluates depth and horizontal spatial variability in the recruitment process of the whole associated bivalve community. We valuated recruitment in three different stations; in each station we submerged 12 recruitment devices (RD), summing up to 36 RDs in total. Six RDs per station where moored near to the coast at 10 meters depth and six further from the coast at 20 meters depth. Each RD consisted of a mooring with rope and buoy with bags fixed at 5, 10, and if possible, 15, and 20 meters depth. RDs were left for 6 months (15 March – 30 September 2008). Eleven bivalve species settled on the collectors with a total of 9.620 specimens. Musculus costulatus was the most abundant species with approximately 69,75 % of the total, while commercial and ecologically important species like Chlamys varia and Pinna nobilis, respectively, were also found. There was a clear relation of species composition to sampling depth, most species recruited on the collectors placed from 10 to 15 m, only Mytilus galloprovincialis tended to recruit at hallower bags collectors (i.e. 5 meters). We also found a significant effect of species composition due to locality and location of the RD (i.e. placed in-shore or off-shore). Differences among species composition seem related to local organic matter input, geographic exposure, and extension and status of the Posidonia oceanica meadow ecosystem. This study improves knowledge about spatial recruitment of bivalve communities on artificial collectors and can serve as a tool for management in MPAs.

Related staff

  • Iris Eline Hendriks
  • Josep Alós Crespí