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Publication details

Document type
Journal articles

Document subtype
Full paper

Title
Bromine biogeodynamics in the NE Atlantic: A perspective from natural wetlands of western Portugal

Participants in the publication
F. Moreno (Author)
J. Moreno (Author)
IDL - Instituto Dom Luiz
F. Fatela (Author)
Dep. Geologia
IDL - Instituto Dom Luiz
L. Guise (Author)
C. Vieira (Author)
M. Leira (Author)
Instituto Dom Luiz

Summary
Bromine (Br) cycling in naturalwetlands is highly complex, including abiotic/biotic processes andmultiphase inorganic/\\\\\\\\\\\\\\\\norganic Br-species.Wetland ecosystems receive Br primarily from the ocean, functioning as either sinks\\\\\\\\\\\\\\\\nor sources of Br, with the overall imbalance largely decided by the prevailing climate. Aiming to trace the presentday\\\\\\\\\\\\\\\\ntransport of oceanogenic Br (i.e., derived fromsalt-water spray-droplets) and its uptake and storage in brackish\\\\\\\\\\\\\\\\nand freshwater wetlands, we surveyed waters, autochthonous plants, and soils/sediments from coastal\\\\\\\\\\\\\\\\nmarshes and mountain peatlands in thewesternmost fringe of northern Portugal. The calculated enrichment factors\\\\\\\\\\\\\\\\nof bromide (Br−) relative to chloride in rainfall (EFsea=16.8–75.3), rivers (EFsea=1.3–13.9) and wetland\\\\\\\\\\\\\\\\nwaters, superficial (EFsea=5.8–13.1) and interstitial (EFsea=2.1–8.9), increased towards the inland highlands.\\\\\\\\\\\\\\\\nWe hypothesized that these values derived mostly from a known Br autocatalytic (heterogeneous) chemical\\\\\\\\\\\\\\\\ncycle, starting at the seawater-aqueous interface and progressing in altitude. Br-bearing air masses are carried\\\\\\\\\\\\\\\\nfar from the Atlantic Ocean by moist westerlies, with Br− rainout from the atmosphere supplying the\\\\\\\\\\\\\\\\nneighbouring mountain peatlands. Average [Br] in sampled wetland soils/sediments (111–253 mg/kg) agreed\\\\\\\\\\\\\\\\nwith values from other coastal regions, and they were directly correlated with the abundance of organic matter,\\\\\\\\\\\\\\\\nvarying irrespective the [Br−] of interstitial waters (129 μg/L–79 mg/L). According to the computed\\\\\\\\\\\\\\\\nbioconcentration factors, the aqueous component was the major source of Br for all plant species investigated\\\\\\\\\\\\\\\\n(BFplant/water= 2.1–508.0), as described elsewhere. However, Br contents in plants (14–173 mg/kg) evidenced\\\\\\\\\\\\\\\\ninterspecific differences, also suggesting a divergence from the acknowledged halophytic-glycophytic “model”.\\\\\\\\\\\\\\\\nAs plants are recognized producers of Br volatile molecules (e.g., methyl bromide, CH3Br), we interpreted

Date of Publication
2020-06

Where published
Science of The Total Environment

Publication Identifiers
ISSN - 0048-9697

Publisher
Elsevier BV

Volume
722

Starting page
137649

Document Identifiers
DOI - https://doi.org/10.1016/j.scitotenv.2020.137649
URL - http://dx.doi.org/10.1016/j.scitotenv.2020.137649

Keywords
Salt marshes Peatlands Autochthonous plants (De)bromination Phytovolatilization Climate


Export

APA
F. Moreno, J. Moreno, F. Fatela, L. Guise, C. Vieira, M. Leira, (2020). Bromine biogeodynamics in the NE Atlantic: A perspective from natural wetlands of western Portugal. Science of The Total Environment, 722, ISSN 0048-9697. eISSN . http://dx.doi.org/10.1016/j.scitotenv.2020.137649

IEEE
F. Moreno, J. Moreno, F. Fatela, L. Guise, C. Vieira, M. Leira, "Bromine biogeodynamics in the NE Atlantic: A perspective from natural wetlands of western Portugal" in Science of The Total Environment, vol. 722, 2020. 10.1016/j.scitotenv.2020.137649

BIBTEX
@article{45706, author = {F. Moreno and J. Moreno and F. Fatela and L. Guise and C. Vieira and M. Leira}, title = {Bromine biogeodynamics in the NE Atlantic: A perspective from natural wetlands of western Portugal}, journal = {Science of The Total Environment}, year = 2020, volume = 722 }