Journal article
Assessment of the temporal retention of mercury and nutrient records within the mangrove sediments of a highly impacted estuary
Environmental Research, Vol.206, pp.1-13
15/04/2022
PMID: 34932983
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Source: InCites
Abstract
Mangrove ecosystems are dynamic and biodiverse environments with the capacity to sequester more organic carbon per unit area, per time, than terrestrial forests, yet are among one of the most heavily degraded ecosystems on Earth. Here, we quantify trace metal, nutrient and carbon accumulation rates in a tropical mangrove environment in northeast Brazil, a region that has been rapidly developed over the past seven decades. Carbon accumulation rate results show modest or no increase since the 1950's, when major development occurred in the region. Organic carbon isotope (δ13C) and C:N molar ratios indicate that the OM is primarily derived from autochthonous C3 plant sources. However, the most recent sediments revealed changes from terrestrial to alga-derived source of OM, which is consistent with the increase of total nitrogen, δ15N and total phosphorous content in the last seven decades, suggesting anthropogenic impact. Furthermore, the Hg enrichment factor (EF) in mangrove sediments is shown to have increased 13-fold since the 1960's, highlighting the ability of tropical mangrove systems in trap filtering pollutants from proximal urban development.
Details
- Title
- Assessment of the temporal retention of mercury and nutrient records within the mangrove sediments of a highly impacted estuary
- Creators
- Tiago Passos - The University of SydneyChristian J Sanders - Southern Cross UniversityRoberto Barcellos - Universidade Federal de PernambucoDan Penny - The University of Sydney
- Publication Details
- Environmental Research, Vol.206, pp.1-13
- Publisher
- Elsevier Inc
- Grant note
- Tiago Passos is funded by an Australia Government Research Training Program (RTP) scholarship.
- Identifiers
- 991012987894002368
- Copyright
- © 2021 Elsevier Inc. All rights reserved.
- Academic Unit
- Faculty of Science and Engineering; Science; National Marine Science Centre
- Language
- English
- Resource Type
- Journal article