Redox Effects on Organic Matter Storage in Coastal Sediments during the Holocene: A BiomarkerProxy Perspective

Thomas S. Bianchi, Kathryn M Schreiner, Richard W. Smith, David J. Burdige, Stella Woodard, Daniel J. Conley

Research output: Contribution to journalReview articlepeer-review

25 Scopus citations

Abstract

Coastal margins play a significant role in the burial of organic matter (OM) on Earth. These margins vary considerably with respect to their efficiency in OM burial and to the amounts and periodicity of their OM delivery, depending in large part on whether they are passive or active margins. In the context of global warming, these coastal regions are expected to experience higher water temperatures, changes in riverine inputs of OM, and sea level rise. Low-oxygen conditions continue to expand around the globe in estuarine regions (i.e., hypoxic zones) and shelf regions (i.e., oxygen minimum zones), which will impact the amounts and sources of OM stored in these regions. In this review, we explore how these changes are impacting the storage of OM and the preservation of sedimentary biomarkers, used as proxies to reconstruct environmental change, in coastal margins.

Original languageEnglish (US)
Pages (from-to)295-319
Number of pages25
JournalAnnual Review of Earth and Planetary Sciences
Volume44
DOIs
StatePublished - Jun 29 2016

Keywords

  • Anthropogenic
  • Environmental change
  • Hypoxia
  • Organic carbon burial
  • Oxygen minimum zones

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