Meiofauna reduces bacterial mineralization of naphthalene in marine sediment.

Näslund J, Nascimento FJ, Gunnarsson JS

ISME J 4 (11) 1421-1430 [2010-11-00; online 2010-05-14]

The role of sediment-living meiofauna, benthic invertebrates smaller than 1000 μm such as nematodes and ostracods, on the mineralization of naphthalene, a common polycyclic aromatic hydrocarbon (PAH) in marine sediments, 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.

NGI Uppsala (Uppsala Genome Center)

National Genomics Infrastructure

QC bibliography QC xrefs

PubMed 20463764

DOI 10.1038/ismej.2010.63

Crossref 10.1038/ismej.2010.63

pii: ismej201063
GENBANK: FN555293
GENBANK: FN555294
GENBANK: FN555295
GENBANK: FN555296
GENBANK: FN555297
GENBANK: FN555298
GENBANK: FN555299
GENBANK: FN555300
GENBANK: FN641887
GENBANK: FN641888
GENBANK: FN641889