Please use this identifier to cite or link to this item:
logo share SHARE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE

Accumulation and Cycling of Polycyclic Aromatic Hydrocarbons in Zooplankton

AuthorsBerrojalbiz, Naiara CSIC ORCID; Lacorte Bruguera, Silvia CSIC ORCID; Calbet, Albert CSIC ORCID ; Saiz, Enric CSIC ORCID ; Barata Martí, Carlos CSIC ORCID ; Darch, Jordi
Issue Date19-Feb-2009
PublisherAmerican Chemical Society
CitationEnviron. Sci. Technol. 43, 2295–2301 (2009)
AbstractPlanktonic food webs play an important role driving the environmental fate of persistent organic pollutants, and POP accumulation in phytoplankton has been previously studied for its importance as a first step in the aquatic food webs. However, little is known about the accumulation and cycling of organic pollutants between zooplankton and water. The present study shows the results of laboratory experiments on the bioconcentration (by passive uptake) of polycyclic aromatic hydrocarbons in phytoplankton (Rhodomonas salina) and accumulation in copepods (Paracartia(acartia) grani), by ingestion and diffusion. Both bioconcentration (BCF) and bioaccumulation (BAF) factors show significant correlation with the octanol-water partition coefficient (Kow) for phytoplankton and zooplankton. The BCF values for phytoplankton were 2 orders of magnitude higher than those for copepods. The analysis of fecal pellets shows that elimination by defecation is mainly significant for PAHs taken up from ingested phytoplankton but not due to passive uptake. However, the dominant elimination mechanisms are by far metabolism and diffusive depuration. Indeed, the mass balance suggests that metabolism of PAHs by copepods is a significant process that could play a role in the fate of PAHs in the water column. Uptake, depuration, eggestion, and ingestion rates increased with hydrophobicity of the chemical, while the metabolism rate was slightly higher for the less hydrophobic compounds. Passive partitioning dominated the accumulation of POPs in zooplankton. The derivation of all the uptake and loss rate constants for PAHs opens the door to future modeling studies of the role of zooplankton in PAH cycling in the marine environment
Description9 pages, 3 figures, 1 table
Appears in Collections:(ICM) Artículos
(IDAEA) Artículos

Show full item record
Review this work

Page view(s)

checked on May 19, 2022

Google ScholarTM


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.