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Changes of nutrient concentrations and phytoplankton communities after morphological modification in the S'Ena Arrubia Lagoon (Central-Western Sardinia)

Trebini, Felicina and Padedda, Bachisio Mario and Ceccherelli, Giulia and Lugliè, Antonella Gesuina Laura and Sechi, Nicola (2005) Changes of nutrient concentrations and phytoplankton communities after morphological modification in the S'Ena Arrubia Lagoon (Central-Western Sardinia). Chemistry and Ecology, Vol. 21 (6), p. 491-502. eISSN 1029-0370. Article.

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DOI: 10.1080/02757540500438854

Abstract

Abstract S'Ena Arrubia Lagoon (Central-Western Sardinia) is a eutrophic system and is strongly influenced by human activities. The sea mouth was widened in 2000 to reduce the high trophic levels and improve its hydrodynamics. To study the environmental consequences of this 'reframing', nutrient concentrations and phytoplankton were compared before (1990-1999) and after (2000-2003) the hydrological works. The land-ocean interactions in the coastal zone (LOICZ) biogeochemical model was also applied for some years during the previously mentioned two periods. Results showed significant variations for salinity, Chlorophyll a and phytoplanktonic principal classes, and the LOICZ model results indicated that the water residence time was less. However, the expected decrease of nutrient concentration was not observed. Sea-mouth widening is one of the possible management strategies that can be used to reduce the high trophic state of lagoons. It should, however, probably be used in conjunction with watershed management if the objective is also to reduce eutrophication.

Item Type:Article
ID Code:1662
Status:Published
Refereed:Yes
Uncontrolled Keywords:Coastal lagoon, environmental management, eutrophication, nutrients, phytoplankton, engineering works
Subjects:Area 05 - Scienze biologiche > BIO/07 Ecologia
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze botaniche, ecologiche e geologiche
Publisher:Taylor & Francis
eISSN:1029-0370
Additional Information:Paper presented at: The influence of river basin-coastal zone interactions: International Conference on Southern European Coastal Lagoons, Ferrara, Italy, November 10-12, 2003.
Deposited On:18 Aug 2009 10:05

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