Abstract

1 - This study related recent distribution changes in seven macroalgae taxa (Acetabularia acetabulum,Chaetomorpha linum, Cladophora sp., Gracilariopsis longissima, Spyridia sp., Ulva laetevirens,Valonia aegagrophyla) to spatial (basin) and temporal (time) trophic differences in a meso-eutrophicMediterranean coastal lagoon (Orbetello, Italy).2 - In July 2003 and July 2009, the coverage percentage (CP) of each considered taxon was measuredin 38 stations equally distributed in the Western and Eastern lagoon basins. All data were analysedusing SURFER v8.0 software along with ANOVA, ANOSIM and multivariate analyses to producegeostatistical spatial distribution maps and to estimate statistical probabilities for "basin" and "time"factors.3 - Data from this study were integrated with data on phanerogams reported by Giovani et al. (2010)to evaluate changes occurring at a functional group level from 2003-2009 using the EcologicalEvaluation Index (EEI).4 - Observed macroalgae changes may have been due to lagoon management activities performed duringthe study period. The removal of direct nitrate inputs seems to have forced specie-specific shifts thatwere highly significant only in the Western basin.5 - Statistically significant differences at the taxon level have been indicated for Spyridia sp. (basinand time) and Cladophora sp. (time) taxa. Other non-significant changes included a rarefaction ofChaetomorpha linumin the Western basin and Spyridia sp. in the Eastern basin, and an increase ofGracilariopsis longissima, C. linum and Valonia aegagrophyla in the Eastern basin.6 - EEI application indicated a general improvement in water quality due to management measuresapplied in Western basin, whereas the Eastern basin evidences stability/slight degradation from2003-2009.

Autore Pugliese

• Specchiulli Antonietta

Tutti gli autori

• Giovani A.; Mari E.; Specchiulli A.; Focardi S.; Renzi M.

Titolo volume/Rivista

Transitional water bulletin

Anno di pubblicazione

2014

ISSN

1825-229X

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

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Numero di citazioni Scopus

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Settori ERC

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Codici ASJC

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