Sea level rise produces abundant organobromines in salt-affected coastal wetlands

C. Joe-Wong, D. R. Schlesinger, A. T. Chow, Satish Chandra Babu Myneni

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Global sea level rise exposes terrestrially derived natural organic matter to elevated salinities, which may alter the complex biogeochemical cycling of halogens in coastal wetland sediments. Here we show that sea level rise increases the natural production of organobromines in submerged soils and wetland sediments. We compared the concentrations and speciation of sedimentary chlorine and bromine along a salinity gradient in low-lying coastal forested wetlands in Winyah Bay (South Carolina, United States). Sorption differences between chloride and bromide were not observed, but up to 80 % of total retained bromine is organically bound, with the highest fraction of organically bound bromine found in formerly freshwater wetlands inundated by seawater. Wet/dry cycling of soils and the abundance of aromatic-rich natural organic matter in these salt-affected dieback forested wetlands promote bromination of organic matter, as demonstrated by laboratory simulations. Bromination of soil organic matter caused by continued sea level rise thus may be a major source of organobromines in coastal environments and possibly volatile halomethanes.

Original languageEnglish (US)
Pages (from-to)31-35
Number of pages5
JournalGeochemical Perspectives Letters
Volume10
DOIs
StatePublished - 2019

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Geology
  • Geochemistry and Petrology

Fingerprint Dive into the research topics of 'Sea level rise produces abundant organobromines in salt-affected coastal wetlands'. Together they form a unique fingerprint.

  • Cite this