The role of transport processes of particulate mercury in modifying marine anthropogenic secondary sources, the case of Haifa bay, Israel

Merav M. Bareket, Revital Bookman, Regina Katsman, Henko de Stigter, Barak Herut

Research output: Contribution to journalArticlepeer-review

Abstract

We have assessed the redistribution of a secondary source of sedimentary anthropogenic mercury in the Haifa bay (HB) area (SE Levantine basin), which is the northern sink for Nile-driven sand. A long-term (30 years) ~. 80% decrease of the total sedimentary mercury concentrations (THg) was recorded in the inner bay, while an up to 3-fold increase was recorded in the top sediments of the outer bay. Sedimentary THg depth profiles and their temporal variability were used to model the main re-distribution processes, mainly resuspension associated with winter storm-derived transport. This mechanism transforms a secondary, sandy and well-aerated sink into a tertiary, more silty and hypoxic source at adjacent peripheral areas, affecting mercury bioavailability. We revisited the concept of environmental relaxation, i.e. the rate of return of a polluted environment to an acceptable state, showing that sedimentary transport processes may affect the associated ecological risks, mainly at shallow-water coastal sites.

Original languageEnglish
Pages (from-to)286-291
Number of pages6
JournalMarine Pollution Bulletin
Volume105
Issue number1
DOIs
StatePublished - 15 Apr 2016

Bibliographical note

Publisher Copyright:
© 2016 Elsevier Ltd.

Keywords

  • Anthropogenic pollution
  • Marine sediment
  • Mediterranean
  • Mercury
  • Resuspension

ASJC Scopus subject areas

  • Pollution
  • Aquatic Science
  • Oceanography

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