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Publication Type J
Authors Lillebo, A. I., D. F. R. Cleary, B. Marques, A. Reis, T. L. da Silva and R. Calado
Title Ragworm fatty acid profiles reveals habitat and trophic interactions with halophytes and with mercury
Source Marine Pollution Bulletin
Author Keywords Fatty acid trophic markers Salt marshes Hediste diversicolor Sediment Hg scirpus-maritimus juncus-maritimus salt-marsh environmental-conditions sediments growth vegetation
Abstract The present study aimed to assess if ragworm fatty acids (FA) profiles could be used to discriminate their spatial distribution in an historically mercury-contaminated estuarine environment, i.e., if it was possible to differentiate ragworms present in salt marsh sediments surrounding plant roots and rhizomes (rhizosediment) from adjacent unvegetated sediment. Additionally, we also tried to determine if ragworms differed in mercury content and if these values could also be used to identify the habitat they occur in. Results show that, within the same area, ragworms can be distinguished using FA profiles and that in halophyte rhizosediment ragworms display more than twice the levels of alpha-linolenic acid (18:3n-3). The ratio cis-vaccenic/oleic acids (18:1n-7/18:ln-9) in ragworms suggests higher carnivory in unvegetated sediments. Our study indicates that ragworm FA profiles can be used to identify their habitat, their trophic interaction with halophytes and reveal a spatially contrasting feeding behaviour, which also reflects mercury accumulation. (C) 2012 Elsevier Ltd. All rights reserved.
Author Address [Lillebo, Ana Isabel; Richard Cleary, Daniel Francis; Marques, Bruna; Calado, Ricardo] Univ Aveiro, Dept Biol, P-3810193 Aveiro, Portugal. [Lillebo, Ana Isabel; Richard Cleary, Daniel Francis; Marques, Bruna; Calado, Ricardo] Univ Aveiro, CESAM, P-3810193 Aveiro, Portugal. [Reis, Alberto; da Silva, Teresa Lopes] IP LNEG, Lab Nacl Energia & Geol, Unidad Bioenergia, P-1649038 Lisbon, Portugal. Lillebo, AI (reprint author), Univ Aveiro, Dept Biol, Campus Univ Santiago, P-3810193 Aveiro, Portugal. lillebo@ua.pt
ISSN 0025-326X
ISBN 0025-326X
29-Character Source Abbreviation Mar. Pollut. Bull.
Publication Date Nov
Year Published 2012
Volume 64
Issue 11
Beginning Page 2528-2534
Digital Object Identifier (DOI) 10.1016/j.marpolbul.2012.08.009
Unique Article Identifier WOS:000312418100043
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