To study the benthic foraminifers’ response to heavy metal pollution and analyse the geochemical parameters, samples of surface sediments were collected in 2005 and 2006 from a polluted coastal zone shorefront to the industrial complex of Portoscuso–Portovesme (Sulcis, South-Western Sardinia). The samples came from the upper 1–2 cm of the undisturbed sediments in water less than 2 m deep, along coastline (about 8.5 km in length) proximal to emerged alluvial plain. The entire examined marine area represents a shallow inner shelf, which is physiographically fairly protected and characterized by low turbulence, but subjected to southwards littoral drift. Geochemical analyses of seawater, sediments and foraminiferal tests correlated to biotic indexes (Dominance, Shannon–Weaver, Simpson, Eveness, Menhinick, Margalef, Equitability, Fisher-a, Berger-Parker and Q-mode Cluster Analyses – Ward Method) and provide data on environmental stress. A total of 38 benthic foraminiferal species were identified. Increasing pollution results in low species diversity, low population density and more frequent abnormal specimens. Results from ESEM images allow recognition of a strong infestation on the calcareous foraminiferal tests by microbial communities developed in the polluted environment.

Benthic foraminifera response and geochemical characterization of the coastal environment surrounding the polluted industrial area of Portovesme (South-Western Sardinia, Italy)

DA PELO, STEFANIA;IBBA, ANGELO;BUOSI, CARLA;
2009-01-01

Abstract

To study the benthic foraminifers’ response to heavy metal pollution and analyse the geochemical parameters, samples of surface sediments were collected in 2005 and 2006 from a polluted coastal zone shorefront to the industrial complex of Portoscuso–Portovesme (Sulcis, South-Western Sardinia). The samples came from the upper 1–2 cm of the undisturbed sediments in water less than 2 m deep, along coastline (about 8.5 km in length) proximal to emerged alluvial plain. The entire examined marine area represents a shallow inner shelf, which is physiographically fairly protected and characterized by low turbulence, but subjected to southwards littoral drift. Geochemical analyses of seawater, sediments and foraminiferal tests correlated to biotic indexes (Dominance, Shannon–Weaver, Simpson, Eveness, Menhinick, Margalef, Equitability, Fisher-a, Berger-Parker and Q-mode Cluster Analyses – Ward Method) and provide data on environmental stress. A total of 38 benthic foraminiferal species were identified. Increasing pollution results in low species diversity, low population density and more frequent abnormal specimens. Results from ESEM images allow recognition of a strong infestation on the calcareous foraminiferal tests by microbial communities developed in the polluted environment.
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: https://hdl.handle.net/11584/91532
 Attenzione

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

Citazioni
  • ???jsp.display-item.citation.pmc??? 1
  • Scopus 44
  • ???jsp.display-item.citation.isi??? 42
social impact