Differences between Lipids Extracted from Five Species Are Not Sufficient To Explain Biomagnification of Nonpolar Organic Chemicals

Annika Jahnke, Jan Holmbäck, Rina Argelia Andersson, Amelie Kierkegaard, Philipp Mayer, Matthew MacLeod

    Research output: Contribution to journalLetterpeer-review

    589 Downloads (Pure)

    Abstract

    Lipids are the major sorptive phase for many organic chemicals that bioaccumulate in foodwebs. However, “lipids” are usually operationally defined by the extraction protocol. Large differences in sorptive capacities between species would violate assumptions implicit in widely used lipid-normalization procedures and invalidate generic bioaccumulation factors. We extracted lipids from five species from different trophic levels and domains and determined fractions of triglycerides, phospholipids, and cholesterol. We passively dosed the lipids with cyclic volatile methylsiloxanes and chlorobenzenes via headspace from spiked olive oil to determine their sorptive capacities. Lipids from seal blubber and pork bacon solely composed of triglycerides had capacities similar to that of olive oil; lipids from mussels, herring, and guillemot egg had quantifiable fractions of phospholipids and cholesterol and showed capacities reduced by factors of up to 2.3-fold. Generally, the sorptive capacities of the lipids were not elevated relative to the olive oil controls and are unlikely to explain a substantial part of biomagnification.
    Original languageEnglish
    JournalEnvironmental Science & Technology Letters
    Volume2
    Issue number7
    Pages (from-to)193-197
    ISSN2328-8930
    DOIs
    Publication statusPublished - 2015

    Bibliographical note

    ACS AuthorChoice - This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.

    Fingerprint

    Dive into the research topics of 'Differences between Lipids Extracted from Five Species Are Not Sufficient To Explain Biomagnification of Nonpolar Organic Chemicals'. Together they form a unique fingerprint.

    Cite this