Abstract
Structured sampling designs are important in the assessment of environmental impacts of variable ecological systems. Recent developments have provided a useful framework extending existing univariate techniques into a multivariate context. Measures of taxonomic relatedness have also been introduced, which complement existing measures of diversity of assemblages. In this study, the potential effects of sewage discharge on spatial patterns of highly diverse molluscan assemblages in a Mediterranean rocky subtidal habitat were investigated. Nine 20 cm×20 cm quadrats were taken from each of three sites (80 m–100 m apart) within a putatively impacted location near a sewage outfall (I) and at each of two control locations (Cs) by destructive sampling by SCUBA divers at a depth of 3 m–4 m. A total of 5507 specimens of 151 species were collected. The average and the variance in total abundance of molluscs were greater, on average, at I than at Cs. Higher abundances at the sewage outfall were largely driven by greater numbers of juvenile molluscs. The Shannon diversity of molluscs (H′) was significantly lower at I, but no difference among locations was detected for the total number of species (S). In addition, the taxonomic distinctness (Δ*) of molluscs was greater at Cs, although it was more variable at I. Multivariate analyses showed that there was a significant difference in the structure of assemblages at I compared with Cs. The location near the outfall was characterized by greater abundances of several species, including especially the gastropods Pusillina philippi, Bittium latreilli, and Bittium reticulatum. There was also greater variability in the structure of assemblages among sites and among quadrats at control locations compared to those near the outfall. Using a suite of univariate and multivariate measures, including diversity indices, detailed information on taxonomic structure and analyses of variability at different spatial scales, provided useful insights into the effects of sewage impacts on these diverse assemblages. These results also highlighted the importance of analysing measures of variance, as well as mean in considering effects of stress in natural communities.
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Acknowledgements
Christian Vaglio and Dario Negro greatly assisted in fieldwork. Anna Lucia Delos provided invaluable assistance with the processing of samples and sorting operations. Financial support extended by PEET (Partnerships for Enhancing Expertise in Taxonomy) and MURST (COFIN and FIRB projects). The authors acknowledge the support by the MARBEF Network of Excellence “Marine Biodiversity and Ecosystem Functioning,” which is funded in the Community’s Sixth Framework Programme (contract no. GOCE-CT-2003-505446).
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Communicated by R. Cattaneo-Vietti, Genova
Appendix A
Appendix A
Taxonomic list of the species collected
Polyplacophora |
---|
Lepidopleurida |
Lepidopleuridae |
Lepidopleurus (Lepidopleurus) cajetanus (Poli, 1791) |
Lepidopleurus (Leptochiton) scabridus (Jeffreys, 1880) |
Ischnochitonidae |
Ischnochiton (Ischnochiton) rissoi (Payraudeau, 1826) |
Callochiton septemvalvis (Montagu, 1803) |
Lepidochitonamonterosatoi Kaas and Van Belle, 1981 |
Chitonidae |
Chiton (Rhyssoplax) olivaceus Spengler, 1797 |
Chiton (Rhyssoplax) phaseolinus Monterosato, 1879 |
Acanthochitonidae |
Acanthochitonacrinitacrinita (Pennant, 1777) |
Acanthochitonafascicularis (Linné, 1767) |
Gastropoda |
---|
Docoglossa |
Patellidae |
Patellaulyssiponensis Gmelin, 1791 |
Vetigastropoda |
Fissurellidae |
Emarginulaoctaviana Coen, 1939 |
Diodoragibberula (Lamarck, 1822) |
Scissurellidae |
Scissurellacostata D’Orbigny, 1824 |
Sinezonacingulata (Costa O.G., 1861) |
Haliotidae |
Haliotistuberculatatuberculata Linné, 1758 |
Turbinidae |
Tricolia tenuis (Michaud, 1829) |
Trochidae |
Clanculus (Clanculopsis) cruciatus (Linné, 1758) |
Gibbula (Colliculus) racketti (Payraudeau, 1826) |
Gibbula (Colliculus) turbinoides (Deshayes, 1835) |
Gibbula (Steromphala) divaricata (Linné, 1758) |
Gibbula (Tumulus) umbilicarisumbilicaris (Linné, 1758) |
Jujubinus exasperatus (Pennant, 1777) |
Jujubinus striatus striatus (Linné, 1758) |
Calliostomalaugerilaugeri (Payraudeau, 1826) |
Neritopsina |
Neritidae |
Smaragdiaviridis (Linné, 1758) |
Caenogastropoda |
Cingulopsidae |
Eatonina (Coriandria) cossurae (Calcara, 1841) |
Eatonina (Coriandria) fulgida (Adams J., 1797) |
Rissoidae |
Rissoa guerinii Récluz, 1843 |
Rissoa similis Scacchi, 1836 |
Rissoa variabilis (von Muehlfeldt, 1824) |
Rissoaviolaceaviolacea (Récluz, 1843) |
Alvaniacancellata (Da Costa, 1778) |
Alvaniacimex (Linné, 1758) |
Alvanialactea (Michaud, 1832) |
Alvanialineata Risso, 1826 |
Alvaniapagodula (Bucquoy, Dautzenberg and Dollfus, 1884) |
Alvaniaparvula (Jeffreys, 1884) |
Alvaniasubcrenulata (Bucquoy, Dautzenberg and Dollfus, 1884) |
Crisillasemistriata (Montagu, 1808) |
Manzonia crassa (Kanmacher, 1798) |
Pusillina philippi (Aradas and Maggiore, 1844) |
Setiaamabilis (Locard, 1886) |
Setiaturriculata Monterosato, 1884 |
Rissoinabruguieri (Payraudeau, 1826) |
Barleeidae |
Barleia unifasciata (Montagu, 1803) |
Anabathridae |
Nodulus contortus (Jeffreys, 1856) |
Caecidae |
Caecum trachea (Montagu, 1803) |
Cerithiidae |
Cerithium rupestre Risso, 1826 |
Cerithium vulgatum Bruguière, 1792 |
Bittium latreilli (Payraudeau, 1826) |
Bittium reticulatum (Da Costa, 1778) |
Vermetidae |
Vermetus triquetrus Bivona Ant., 1832 |
Vermetus (Thylacodus) granulatus (Gravenhorst, 1831) |
Dendropomacristatum (Biondi, 1857) |
Serpulorbis arenaria (Linné, 1767) |
Skeneopsidae |
Skeneopsis planorbis (Fabricius, 1780) |
Fossaridae |
Fossarus ambiguus (Linné, 1758) |
Cerithiopsidae |
Cerithiopsis fayalensis Watson, 1886 |
Cerithiopsis minima (Brusina, 1865) |
Cerithiopsis nana Jeffreys, 1867 |
Cerithiopsis tubercularis (Montagu, 1803) |
Dizoniopsis coppolae (Aradas, 1870) |
Triphoridae |
Cheirodonta pallescens (Jeffreys, 1867) |
Monophorus perversus (Linné, 1758) |
Marshallora adversa (Montagu, 1803) |
Metaxia metaxa (Delle Chiaje, 1828) |
Epitoniidae |
Gyroscalalamellosa (Lamarck, 1822) |
Eulimidae |
Vitreolinaphilippi (Rayneval and Ponzi, 1854) |
Neogastropoda |
Muricidae |
Hexaplex trunculus (Linné, 1758) |
Muricopsis cristata (Brocchi, 1814) |
Ocinebrina aciculata (Lamarck, 1822) |
Ocinebrina edwardsii (Payraudeau, 1826) |
Stramonita haemastoma (Linné, 1766) |
Coralliophilidae |
Coralliophila meyendorffii (Calcara, 1845) |
Buccinidae |
Buccinulum corneum (Linné, 1758) |
Pisania striata (Gmelin, 1791) |
Chauvetia turritellata (Deshayes, 1835) |
Engina leucozona (Philippi, 1843) |
Pollia dorbignyi (Payraudeau, 1826) |
Pollia scacchiana (Philippi, 1844) |
Columbellidae |
Columbella rustica (Linné, 1758) |
Mitrella scripta (Linné, 1758) |
Nassariidae |
Nassarius (Hima) incrassatus (Stroem, 1768) |
Nassarius (Telasco) cuvierii (Payraudeau, 1826) |
Fasciolariidae |
Fasciolaria lignaria (Linné, 1758) |
Cystiscidae |
Gibberula miliaria (Linné, 1758) |
Gibberula philippi (Monterosato, 1878) |
Gibberula recondita Monterosato, 1844 |
Mitridae |
Mitra cornicula (Linné, 1758) |
Costellariidae |
Vexillum (Pusia) ebenus (Lamarck, 1811) |
Vexillum (Pusia) savignyi (Payraudeau, 1826) |
Vexillum (Pusia) tricolor (Gmelin, 1791) |
Conidae |
Mangelia taeniata (Deshayes, 1835) |
Mangelia vauquelini (Payraudeau, 1826) |
Raphitoma echinata (Brocchi, 1814) |
Raphitoma horrida (Monterosato, 1884) |
Raphitoma laviae (Philippi, 1844) |
Raphitoma linearis (Montagu, 1803) |
Raphitoma lineolata (Bucquoy, Dautzenberg and Dollfus, 1883) |
Leufroyia concinna (Scacchi, 1836) |
Conus mediterraneus Hwass in Bruguière, 1792 |
Heterostropha |
Rissoellidae |
Rissoella diaphana (Alder, 1848) |
Omalogyridae |
Ammonicera fischeriana (Monterosato, 1869) |
Pyramidellidae |
Eulimella laevis (Blainville, 1827) |
Odostomia lukisii Jeffreys, 1859 |
Odostomia plicata (Montagu, 1803) |
Odostomia (Megastomia) conoidea (Brocchi, 1814) |
Chrysallida emaciata (Brusina, 1866) |
Chrysallida incerta (Milaschewitch, 1916) |
Chrysallida juliae (De Folin, 1872) |
Folinella excavata (Philippi, 1836) |
Odostomella doliolum (Philippi, 1844) |
Ondina warreni (Thompson, 1845) |
Cephalaspidea |
Philinidae |
Philine catena (Montagu, 1803) |
Aglajidae |
Chelidonura italica Sordi, 1980 |
Bullidae |
Bulla striata Bruguière, 1792 |
Runcinidae |
Runcina ferruginea Kress, 1977 |
Anaspidea |
Aplysiidae |
Aplysia (Pruvotaplysia) parvula Guilding in Moerch, 1863 |
Aplysia (Pruvotaplysia) punctata (Cuvier, 1803) |
Notaspidea |
Pleurobranchidae |
Berthella aurantiaca (Risso, 1818) |
Nudibranchia |
Tritoniidae |
Tritonia manicata Deshayes, 1853 |
Dorididae |
Dorididae gen. sp. |
Basommatophora |
Siphonariidae |
Williamia gussoni (Costa, 1829) |
Bivalvia |
---|
Arcida |
Arcidae |
Arca noae Linné, 1758 |
Barbatia barbata (Linné, 1758) |
Noetidae |
Striarca lactea (Linné, 1758) |
Mytilida |
Mytilidae |
Mytilus galloprovincialis Lamark, 1819 |
Mytilaster minimus (Poli, 1795) |
Modiolus barbatus (Linné, 1758) |
Gregariella petagnae (Scacchi, 1832) |
Musculus costulatus (Risso, 1826) |
Lithophaga lithophaga (Linné, 1758) |
Limida |
Limidae |
Lima (Limaria) hians (Gmelin, 1791) |
Lima (Limaria) tuberculata (Olivi, 1792) |
Ostreida |
Spondylidae |
Spondylus gaederopus Linné, 1758 |
Anomiidae |
Anomia ephippium Linné, 1758 |
Venerida |
Lucinidae |
Ctena decussata (Costa, 1829) |
Lucinella divaricata (Linné, 1758) |
Galeommatidae |
Galeomma turtoni Turton, 1825 |
Lasaeidae |
Lasaea rubra (Montagu, 1803) |
Montacutidae |
Mysella bidentata (Montagu, 1803) |
Carditidae |
Cardita calyculata (Linné, 1758) |
Glans trapezia (Linné, 1767) |
Chamida |
Chamidae |
Chama gryphoides Linné, 1758 |
Cardiidae |
Parvicardium scriptum (Bucquoy, Dautzenberg and Dollfus, 1892) |
Plagiocardium (Papillocardium) papillosum (Poli, 1795) |
Veneridae |
Tapes (Ruditapes) decussatus (Linné, 1758) |
Irus irus (Linné, 1758) |
Petricolidae |
Petricola (Lajonkairia) lajonkairii (Payraudeau, 1826) |
Myida |
Gastrochaenidae |
Gastrochaena dubia (Pennant, 1777) |
Hiatellidae |
Hiatella rugosa (Linné, 1767) |
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Terlizzi, A., Scuderi, D., Fraschetti, S. et al. Quantifying effects of pollution on biodiversity: a case study of highly diverse molluscan assemblages in the Mediterranean. Marine Biology 148, 293–305 (2005). https://doi.org/10.1007/s00227-005-0080-8
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DOI: https://doi.org/10.1007/s00227-005-0080-8