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Publication details

Document type
Journal articles

Document subtype
Full paper

Title
Unusual co-occurrence of serpulids and bryozoa in a lagoonal system (Albufeira Coastal Lagoon - Portugal)

Participants in the publication
Freitas, M.C. (Author)
Dep. Geologia
 CEGUL
 Cachão, M. (Author)
Dep. Geologia
 CEGUL
 Cancela da Fonseca, L. (Author)
IMAR/Laborato?rio Mari?timo da Guia
 Unidade de Ciências e Tecnologias dos Recursos Aquáticos - Universidade do Algarve
 Caroça, C. (Author)
MUSEU NACIONAL DE HISTÓRIA NATURAL E DA CIÊNCIA
 Galopim de Carvalho, A.M. (Author)
MUSEU NACIONAL DE HISTÓRIA NATURAL E DA CIÊNCIA
Summary
Here we report the unusual co-occurrence of two invertebrate groups - Bryozoans and Serpulids - in a brackish environment located on the Portuguese western (Atlantic) coast - Albufeira lagoon. In February 1990, during a survey on the physical properties of the lagoonal waters, a singular assemblage and abundance of this two taxa was registered, covering almost completely pebbles and other rigid substrata including trees, bushes, bottles and plastic fragments; particularly evident was the extraordinary development of Serpulids on the Phragmites sp. tips while Bryozoans dominated flat surfaces. This event was found to be related to an unusually high lagoonal water level, due to an extremely rainy winter, coincident with an inlet closed stage. Bryozoans and Serpulids were mainly confined to the 3m-4m upper \\nsection of the water column in which salinity was about %• - 9%•, the temperature registered during the day \\nranged between 14ºC and 18°C and the pH fluctuated between 8.0-8.2 in the inner part of the lagoon and 8.5-8.7 \\nin the main water mass. Only two taxa dominated the assemblages: the Bryozoan species Membranipora savarti (Audouin, 1826) and the Polichaeta Serpulid species Ficopomatus enigmaticus (Fauvel, 1923) displaying a typical opportunistic development. We also recognise the minor presence of a few fragments of another Bryozoan - Conopeum sp.- as well as small Cirripeds. To our knowledge, this is the first time this occurrence is reported in similar Portuguese environments. Due to the carbonated nature of the Bryozoa and Serpulid species exoskeletons, this opportunistic occurrence can be registered in the fossil record and so be used as a potential brackish proxy in paleo-environmental reconstructions. \\n

Date of Publication
1994

Institution
___

Where published
GAIA

Publication Identifiers

Volume
8

Starting page
39
Last page
46


Export

APA
Freitas, M.C., Cachão, M., Cancela da Fonseca, L., Caroça, C., Galopim de Carvalho, A.M., (1994). Unusual co-occurrence of serpulids and bryozoa in a lagoonal system (Albufeira Coastal Lagoon - Portugal). GAIA, 8, 39-46.

IEEE
Freitas, M.C., Cachão, M., Cancela da Fonseca, L., Caroça, C., Galopim de Carvalho, A.M., "Unusual co-occurrence of serpulids and bryozoa in a lagoonal system (Albufeira Coastal Lagoon - Portugal)" in GAIA, vol. 8, pp. 39-46, 1994.

BIBTEX
@article{49091, author = {Freitas, M.C. and Cachão, M. and Cancela da Fonseca, L. and Caroça, C. and Galopim de Carvalho, A.M.}, title = {Unusual co-occurrence of serpulids and bryozoa in a lagoonal system (Albufeira Coastal Lagoon - Portugal)}, journal = {GAIA}, year = 1994, pages = {39-46}, volume = 8 }