Meiofauna reduces bacterial mineralization of naphthalene in marine sediment
2010 (English)In: The ISME journal, ISSN 1751-7362, no 4, 1421-1430 p.Article in journal (Refereed) Published
The role of sediment-living meiofauna, benthic invertebrates smaller than 1000lm, such as nematodes and ostracods, on the mineralization of naphthalene, a common polycyclic aromatic hydrocarbon (PAH), in marine sediment was studied in microcosms using radiorespirometry. A method to extract live meiofauna was developed and used in order to experimentally manipulate meiofauna abundance and group diversity. Higher abundances of meiofauna were found to significantly decrease naphthalene mineralization. Furthermore, a change in the bacterial community composition (studied using terminal restriction fragment length polymorphism) was also observed in presence of higher meiofauna abundance, as well as a lower number of cultivable naphthalene-degrading bacteria. The reduced mineralization of naphthalene and the altered bacterial community composition in the presence of increased meiofauna abundance is likely the result of top-down control by meiofauna. This study shows that higher abundances of meiofauna can significantly decrease the microbial mineralization of PAHs such as naphthalene and also significantly modify the bacterial community composition in natural marine sediments.
Place, publisher, year, edition, pages
International Society for Microbial Ecology , 2010. no 4, 1421-1430 p.
biodegradation; predation; polycyclic aromatic hydrocarbons; trophic interactions; top-down control; live meiofauna extraction; T
Research subject Animal Ecology
IdentifiersURN: urn:nbn:se:su:diva-38802DOI: 10.1038/ismej.2010.63OAI: oai:DiVA.org:su-38802DiVA: diva2:315424