We studied the sclerobiont community associated with organogenic and lithic cobbles from soft bottoms in the Khao Lak coastal area (Andaman Sea) that was damaged by the 2004 tsunami. The 15 cobbles examined originate from grab and hand sampling carried out in the years 2006 and 2007 in the depth range of 4.6–15.2 m. A rich endo- and epibenthos was identified, mainly consisting of algae, foraminifers, sponges, cnidarians, polychaetes, bryozoans and bivalves. Associations on each examined cobble show similarities in composition and structure being characterized by a few dominant groups. Differences were noted in the degree and pattern of colonization, distinguishing for each cobble an upward and a downward side at the time of sampling. The mean total coverage is 15.09% being higher on the upper sides (17.4%) compared to the lower sides (12.8%). Calcareous algae, bivalves and sponges prevail on upper sides, while bryozoans prevail on lower sides. The sclerobionts distribution allowed to infer the orientation of cobbles on the seafloor during colonization. Major colonization values, exceeding 30% coverage, were observed on organogenic cobbles located in the proximity of reefs or collected from below 12 m of water depth. Conversely, cobbles from the shallowest stations result poorly colonized, independently of their composition. The water turbidity and wave motion as a possible cause of the observed distributions were discussed. The Khao Lak cobble community seems to be largely unaffected by the tsunami event, as suggested by the estimated biodiversity, abundance and coverage of sclerobionts

Sanfilippo, R., Rosso, A., Basso, D., Violanti, D., Di Geronimo, I., Di Geronimo, R., et al. (2011). Cobbles colonization pattern from a tsunami-affected coastal area (SW Thailand, Andaman Sea). FACIES, 57(1), 1-13 [10.1007/s10347-010-0226-0].

Cobbles colonization pattern from a tsunami-affected coastal area (SW Thailand, Andaman Sea)

Basso, DM;Benzoni, F
Membro del Collaboration Group
;
2011

Abstract

We studied the sclerobiont community associated with organogenic and lithic cobbles from soft bottoms in the Khao Lak coastal area (Andaman Sea) that was damaged by the 2004 tsunami. The 15 cobbles examined originate from grab and hand sampling carried out in the years 2006 and 2007 in the depth range of 4.6–15.2 m. A rich endo- and epibenthos was identified, mainly consisting of algae, foraminifers, sponges, cnidarians, polychaetes, bryozoans and bivalves. Associations on each examined cobble show similarities in composition and structure being characterized by a few dominant groups. Differences were noted in the degree and pattern of colonization, distinguishing for each cobble an upward and a downward side at the time of sampling. The mean total coverage is 15.09% being higher on the upper sides (17.4%) compared to the lower sides (12.8%). Calcareous algae, bivalves and sponges prevail on upper sides, while bryozoans prevail on lower sides. The sclerobionts distribution allowed to infer the orientation of cobbles on the seafloor during colonization. Major colonization values, exceeding 30% coverage, were observed on organogenic cobbles located in the proximity of reefs or collected from below 12 m of water depth. Conversely, cobbles from the shallowest stations result poorly colonized, independently of their composition. The water turbidity and wave motion as a possible cause of the observed distributions were discussed. The Khao Lak cobble community seems to be largely unaffected by the tsunami event, as suggested by the estimated biodiversity, abundance and coverage of sclerobionts
Articolo in rivista - Articolo scientifico
Cobble communities, Distribution pattern, Sclerobiont coverage, Shallow-water bottoms, Andaman Sea, Tsunami
English
2011
57
1
1
13
reserved
Sanfilippo, R., Rosso, A., Basso, D., Violanti, D., Di Geronimo, I., Di Geronimo, R., et al. (2011). Cobbles colonization pattern from a tsunami-affected coastal area (SW Thailand, Andaman Sea). FACIES, 57(1), 1-13 [10.1007/s10347-010-0226-0].
File in questo prodotto:
File Dimensione Formato  
2011 Sanfilippo et al. Cobbles colonization pattern from a tsunami-aVected coastal area.pdf

Solo gestori archivio

Descrizione: Articolo principale
Dimensione 1.85 MB
Formato Adobe PDF
1.85 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/20932
Citazioni
  • Scopus 10
  • ???jsp.display-item.citation.isi??? 11
Social impact