"During recent decades a rapid expansion of fish farming was developed in Mediterranean coastal waters, resulting in an increasing effort in marine coastal monitoring programs. Such amount of studies make available useful knowledge for an effective improvement of environmental and aquaculture activities.. . In the present contribution, phytoplankton and polychaete infaunal communities, together with a set of environmental parameters, were investigated in a mariculture facility in Alghero Bay (NW Sardinia, Italy). Data were collected during two sampling times in summer 2010. Four stations were sampled in relation to prevailing direction of water currents in Alghero Bay (NW oriented): two of them, designated as impacted, were strictly close to the fish farm facility and the latter two, defined as control sites, were located 350 meters apart NW and NE respectively.. . Analysis of similarities was performed on abundance of phytoplankton and polychaetes to test differences between time 1 and time 2 at control and impacted sites. Non-metric multidimensional scaling (nMDS) was used to produce two-dimensional ordinations. All multivariate analyses were done using the Bray-Curtis similarity index. . . Preliminary results showed no significant differences among stations in phytoplankton abundance, whose values were very low throughout the summer (< 75 x 103 cells l-1), in agreement to the variations of environmental variables. Nevertheless, significant variation was detected between times of sampling. On the other hand, analysis of similarity revealed significant differences among polychaetes assemblages, however pairwise test and non-metric multidimensional scaling ordination did not highlight these differences. . "

Phytoplankton and polychaete communities in a fish farm in Alghero Bay (NW Sardinia, Italy) / Bazzoni, Am; Sechi, Nicola; Lugliè, Antonella Gesuina Laura; Padedda, Bachisio Mario; Lai, Giuseppina Grazia; Casu, D.. - (2011). ((Intervento presentato al convegno XX Congresso A.I.O.L. tenutosi a Lecce nel 4-8 luglio 2011.

Phytoplankton and polychaete communities in a fish farm in Alghero Bay (NW Sardinia, Italy)

SECHI, Nicola;LUGLIÈ, Antonella Gesuina Laura;PADEDDA, Bachisio Mario;LAI, Giuseppina Grazia;
2011

Abstract

"During recent decades a rapid expansion of fish farming was developed in Mediterranean coastal waters, resulting in an increasing effort in marine coastal monitoring programs. Such amount of studies make available useful knowledge for an effective improvement of environmental and aquaculture activities.. . In the present contribution, phytoplankton and polychaete infaunal communities, together with a set of environmental parameters, were investigated in a mariculture facility in Alghero Bay (NW Sardinia, Italy). Data were collected during two sampling times in summer 2010. Four stations were sampled in relation to prevailing direction of water currents in Alghero Bay (NW oriented): two of them, designated as impacted, were strictly close to the fish farm facility and the latter two, defined as control sites, were located 350 meters apart NW and NE respectively.. . Analysis of similarities was performed on abundance of phytoplankton and polychaetes to test differences between time 1 and time 2 at control and impacted sites. Non-metric multidimensional scaling (nMDS) was used to produce two-dimensional ordinations. All multivariate analyses were done using the Bray-Curtis similarity index. . . Preliminary results showed no significant differences among stations in phytoplankton abundance, whose values were very low throughout the summer (< 75 x 103 cells l-1), in agreement to the variations of environmental variables. Nevertheless, significant variation was detected between times of sampling. On the other hand, analysis of similarity revealed significant differences among polychaetes assemblages, however pairwise test and non-metric multidimensional scaling ordination did not highlight these differences. . "
Phytoplankton and polychaete communities in a fish farm in Alghero Bay (NW Sardinia, Italy) / Bazzoni, Am; Sechi, Nicola; Lugliè, Antonella Gesuina Laura; Padedda, Bachisio Mario; Lai, Giuseppina Grazia; Casu, D.. - (2011). ((Intervento presentato al convegno XX Congresso A.I.O.L. tenutosi a Lecce nel 4-8 luglio 2011.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11388/156297
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