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Neave M.J.,Charles Darwin University | Glasby C.J.,Museum and Art Gallery Northern Territory | McGuinness K.A.,Charles Darwin University | Parry D.L.,Australian Institute of Marine Science | And 3 more authors.
Marine Environmental Research | Year: 2013

We collected polychaete diversity and abundance data at a range of impacted and reference sites near an alumina refinery in Melville Bay, northern Australia. The aims were to measure the impact of sediment modified by the alumina refinery discharge on polychaete communities and secondly to gather baseline data from which to measure future changes. Polychaete communities in both soft-bottom habitats and subtidal areas adjacent to mangrove forests were studied. We also developed and deployed an artificial substratum device to sample polychaetes associated with hard-substrate habitats. For each habitat, polychaete community composition was different between impacted and reference sites and at multiple time points. The impact of future changes either from bioremediation or management practices can be measured against these baseline data. Indicator species analysis was used to identify polychaete species that were significantly different at the locations tested, and we discuss their potential as indicator species. © 2013 Elsevier Ltd. Source

Glasby C.J.,Museum and Art Gallery Northern Territory | Lee Y.-L.,National University of Singapore | Hsueh P.-W.,National Chung Hsing University
Raffles Bulletin of Zoology | Year: 2016

An annotated checklist of 1257 species (73 families) of Annelida from the South China Sea (SCS) is presented, including 289 species originally described from the region. The remaining extralimital records (968) are likely to represent a mixture of species complexes, misidentifications or truly widespread species, and therefore should be targets for future taxonomic study. The occurrence of each species within each of seven subregions is reported, with the majority (72%) of species only occurring in a single region. The annelid diversity of Singapore is estimated to be 121 species and 37 families. Families showing the highest levels of diversity in the SCS are the Nereididae (134 species), Syllidae (100), Polynoidae (76), Serpulidae (72), Spionidae (60), and Eunicidae (59). By comparison, both Nereididae and Syllidae are found to be more diverse in the SCS than the Australia region. For the Nereididae, this is likely to be the result of this group’s capacity to tolerate low salinities, which would give its members a selective advantage over other annelids in a region that experiences high freshwater input (river flow and precipitation). In the case of Syllidae, it may be the result of taxonomic bias. The SCS region is home to 19 species that are utilised directly by humans, either as bait, food for penaeid aquaculture or, in few cases, human consumption. © National University of Singapore. Source

Neave M.J.,Charles Darwin University | Streten-Joyce C.,Charles Darwin University | Glasby C.J.,Museum and Art Gallery Northern Territory | McGuinness K.A.,Charles Darwin University | And 2 more authors.
Microbial Ecology | Year: 2012

Tolerant species of polychaete worms can survive in polluted environments using various resistance mechanisms. One aspect of resistance not often studied in polychaetes is their association with symbiotic bacteria, some of which have resistance to metals and may help the organism to survive. We used "next generation" 454 sequencing of bacterial 16S rRNA sequences associated with polychaetes from a copper and zinc-polluted harbor and from a reference site to determine bacterial community structure. We found changes in the bacteria at the polluted site, including increases in the abundance of bacteria from the order Alteromonadales. These changes in the bacteria associated with polychaetes may be relatively easy to detect and could be a useful indicator of metal pollution. © 2011 Springer Science+Business Media, LLC. Source

Aguado M.T.,Autonomous University of Madrid | Glasby C.J.,Museum and Art Gallery Northern Territory
Systematics and Biodiversity | Year: 2015

The geographic distribution of three intriguing genera of Syllidae (Annelida, Phyllodocida), Alcyonosyllis, Paraopisthosyllis and Megasyllis, is restricted to the Pacific Ocean, Indian Ocean and the Red Sea. In this study new material of several species in all three genera is identified, and the distributions of the species and genera refined; four species of Alcyonosyllis were found to have increased ranges. Additionally, one new species of Paraopisthosyllis is described. Paraopisthosyllis pardus sp. nov. is characterized by having long bidentate bladed-chaetae, segments covered by small papillae, and a colour pattern consisting in dark red-brown antennae and dorsal cirri and several transversal dark red-brown lines per segment. The three genera share several striking morphological characteristics, such as alternation in the arrangement of dorsal cirri, wide segments with secondary annuli and bright, contrasting colour patterns. Alcyonosyllis species are found in association with other organisms, most noticeably anthozoans, whereas members of Paraopisthosyllis and Megasyllis are free living. Molecular information (sequences of DNA) from Alcyonosyllis species (including the type species, A. phili), and the type of Megasyllis (M. corruscans) is included herein for the first time in a phylogenetic analysis. A phylogenetic analysis performed through different methods (Maximum parsimony and Maximum likelihood) using sequences of three genes (18S, 16S and COI) reveals that all the three genera form a monophyletic group within Syllidae, with several synapomorphies, and a common ancestor probably from the Indo-Pacific. Their geographic distribution pattern, the relationships between these genera and the rest of syllids, and the symbiosis in Alcyonosyllis are discussed. © 2015 © The Trustees of the Natural History Museum, London 2015. All Rights Reserved. Source

Lee Y.-L.,National University of Singapore | Glasby C.J.,Museum and Art Gallery Northern Territory
Raffles Bulletin of Zoology | Year: 2015

A new cryptic species of Neanthes (Nereididae), N. wilsonchani, new species, is described from intertidal mudflats of eastern Singapore. The new species was confused with both Ceratonereis (Composetia) burmensis (Monro, 1937) and Neanthes glandicincta Southern, 1921, which were found to be conspecific with the latter name having priority. Neanthes glandicincta is newly recorded from Singapore, its reproductive forms (epitokes) are redescribed, and Singapore specimens are compared with topotype material from India. The new species can be distinguished from N. glandicincta by slight body colour differences and by having fewer pharyngeal paragnaths in Areas II (4–8 vs 7–21), III (11–28 vs 30–63) and IV (1–9 vs 7–20), and in the total number of paragnaths for all Areas (16–41 vs 70–113). No significant differences were found in the morphology of the epitokes between the two species. The two species have largely non-overlapping distributions in Singapore; the new species is restricted to Pleistocene coastal alluvium in eastern Singapore, while N. glandicinta occurs in western Singapore as well as in Malaysia and westward to India. © National University of Singapore. Source

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