The distribution of molluscan assemblages across and along a vertical rocky cli¡ near Otranto (southern Adriatic Sea, Italy) was studied. Sampling was undertaken in May and November 2000 at three sites approximately 100m apart. Three depths (5, 15, 25m) were sampled at each site, by scraping o¡ three replicate 2020 cm quadrats. Samples yielded 6722 specimens, referred to as 133 species. Multivariate analyses showed that the structure of the assemblages signi¢cantly di¡ered among depths with a clear gradient of distribution from shallow to deep stands. However, a considerable variation in the structure of the assemblage was also observed among sites at each of the three depths. The species contributing most to characterize depths and/or di¡erentiating sites at each level of the shore were identi¢ed. Some potential causes of the observed di¡erences are discussed.

Molluscs on subtidal cliffs: patterns of spatial distribution

TERLIZZI, ANTONIO;
2003

Abstract

The distribution of molluscan assemblages across and along a vertical rocky cli¡ near Otranto (southern Adriatic Sea, Italy) was studied. Sampling was undertaken in May and November 2000 at three sites approximately 100m apart. Three depths (5, 15, 25m) were sampled at each site, by scraping o¡ three replicate 2020 cm quadrats. Samples yielded 6722 specimens, referred to as 133 species. Multivariate analyses showed that the structure of the assemblages signi¢cantly di¡ered among depths with a clear gradient of distribution from shallow to deep stands. However, a considerable variation in the structure of the assemblage was also observed among sites at each of the three depths. The species contributing most to characterize depths and/or di¡erentiating sites at each level of the shore were identi¢ed. Some potential causes of the observed di¡erences are discussed.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

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: http://hdl.handle.net/11368/2900599
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 35
  • ???jsp.display-item.citation.isi??? 34
social impact