Interrogating pollution sources in a mangrove food web using multiple stable isotopes

SOUZA, IARA DA C.; CRAIG, CAROL-ANN; MIDWOOD, ANDREW J.; THORNTON, BARRY; MATSUMOTO, SILVIA T.; ELLIOTT, MICHAEL; WUNDERLIN, DANIEL A.; MONFERRÁN, MAGDALENA V.; FERNANDES, MARISA N.

THE SCIENCE OF TOTAL ENVIRONMENT

ELSEVIER SCIENCE BV

Año: 2018 vol. 640-641 p. 501 - 501

0048-9697

nthropogenic activities including metal contamination create well-known problems in coastal mangrove ecosystems but understanding and linking specific pollution sources to distinct trophic levels within these environmentsis challenging. This study evaluated anthropogenic impacts on two contrasting mangrove food webs, by using stable isotopes (δ13C, δ15N, 87Sr/86Sr, 206Pb/207Pb and 208Pb/207Pb) measured in sediments, mangrove trees (Rhizophora mangle, Laguncularia racemosa, Avicennia schaueriana), plankton, shrimps (Macrobranchiumsp.), crabs (Aratus sp.), oysters (Crassostrea rhizophorae) andfish (Centropomus parallelus) fromboth areas. Strontium and Pb isotopes were also analysed in water and atmospheric particulate matter (PM). δ15N indicated that crab, shrimp and oyster are at intermediate levelswithin the local foodweb and fish, in this case C. parallelus, was confirmed at the highest trophic level. δ15N also indicates different anthropogenic pressures between b