Epiphytic Bryozoa of Posidonia oceanica leaves and scales
Version 1.0 published by University of Liège on 04 December 2015 University of Liège

Seasonal and depth-related biodiversity of leaf and scale epiphytic Cheilostome Bryozoa of the Neptune grass Posidonia oceanica

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Please be aware, this is an old version of the dataset.  Researchers should cite this work as follows:

Lepoint G, Michel L (2015): Epiphytic Bryozoa of Posidonia oceanica leaves and scales. v1.0. University of Liège. Dataset/Samplingevent. http://ipt.biodiversity.be/resource?r=ulg_bryozoa&v=1.0


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The publisher and rights holder of this work is University of Liège. To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction.

GBIF Registration

This resource has been registered with GBIF, and assigned the following GBIF UUID: c09eb4a4-0df1-4be5-bda7-d1f7e6063a57.  University of Liège publishes this resource, and is itself registered in GBIF as a data publisher endorsed by Belgian Biodiversity Platform.


Samplingevent; epiphytes; biofouling; bryozoan; seagrass; Neptune grass; Nw Mediterranean


Who created the resource:

Gilles Lepoint
Research Associate F.R.S.-FNRS
University of Liège
Loïc Michel
University of Liège
15 allée du 6 août
4000 Liège

Who can answer questions about the resource:

Gilles Lepoint
Research Associate F.R.S.-FNRS
University of Liège
15 allée du 6 août
4000 Liège

Who filled in the metadata:

André Heughebaert
Node Manager
Belgian Biodiversity Platform
Av Louise 231 Louizalaan
B1050 Bruxelles

Who else was associated with the resource:

Corine Pelaprat
STARESO (STAtion de REcherches Sous-marines et Océanographiques)
Geographic Coverage

Revellata Bay (Corsica, Mediterranean Sea)(a part of the Gulf of Calvi)

Bounding Coordinates South West [42.58, 8.724], North East [42.58, 8.728]
Taxonomic Coverage

Bryozoa, Gymnolaemata, Cheilostomata

Phylum  Bryozoa (moss animals)
Class  Gymnolaemata
Order  Cheilostomata
Temporal Coverage
Start Date / End Date 2002-11-01 / 2003-12-31
Sampling Methods

Seagrass shoots were collected in triplicate in November 2002, March, June, September and November 2003 along the same permanent transects set at 7, 10, 15, 20, 25 and 30 m depth. Colonies counted (see above) were reported per meter square, accounting the average P. oceanica shoot density measured at each sampling depth. Shoot density, measured monthly using a quadrate with an area of 0.1 m2 randomly set in the meadow.

Study Extent All sampling and measurements were performed at Revellata Bay (Calvi, Corsica, France), near the marine research centre of STARESO (42°35’N-8°43’E) (University of Liège).
Quality Control Identifications under stereomicroscope (Stemi 2000, Zeiss) were done to the lowest systematic level using keys for Bryozoa (Prenant & Bobin, 1966; Zabala & Maluquer, 1988), and the works of Hayward & McKinney (2002), Gautier (1961) or Balduzzi et al. (1991). All the colonies found on the two sides of leaves were counted. Colony on scales were not counted because dissection of scales (i.e. old leaf petioles remaining on rhizomes after limb abcission) involved colony fragmentation. Each sample is constituted of a single replicate gathering 3 shoots of P. oceanica. For Electra posidoniae, colonies fusion (or apparent fusion) is common. Therefore for this species, as a proxy of the colonies counted, the number of colonies founders (i.e. ancestrulae), which have a distinctive morphology, was counted.

Method step description:

  1. This study involved the monthly assessment of colonization dynamics, biomass seasonality, and diet composition through measurements of stable isotopes, in E. posidoniae at a depth of 10 m in the Revellata Bay (Corsica, Mediterranean Sea).
Additional Metadata