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Effects of a nutrient enrichment pulse on blue carbon ecosystems.
- Source :
-
Marine pollution bulletin [Mar Pollut Bull] 2021 Apr; Vol. 165, pp. 112024. Date of Electronic Publication: 2021 Feb 05. - Publication Year :
- 2021
-
Abstract
- Coastal ecosystems are under increasing pressure from land-derived eutrophication in most developed coastlines worldwide. Here, we tested for 277 days the effects of a nutrient pulse on blue carbon retention and cycling within an Australian temperate coastal system. After 56 days of exposure, saltmarsh and mangrove plots subject to a high-nutrient treatment (~20 g N m <superscript>-2</superscript>  yr <superscript>-1</superscript> and ~2 g P m <superscript>-2</superscript>  yr <superscript>-1</superscript> ) had ~23% lower superficial soil carbon stocks. Mangrove plots also experienced a ~33% reduction in the microbe Amplicon Sequence Variant richness and a shift in community structure linked to elevated ammonium concentrations. Live plant cover, tea litter decomposition, and soil carbon fluxes (CO <subscript>2</subscript> and CH <subscript>4</subscript> ) were not significantly affected by the pulse. Before the end of the experiment, soil carbon- and nitrogen-cycling had returned to control levels, highlighting the significant but short-lived impact that a nutrient pulse can have on the carbon sink capacity of coastal wetlands.<br /> (Copyright © 2021 Elsevier Ltd. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1879-3363
- Volume :
- 165
- Database :
- MEDLINE
- Journal :
- Marine pollution bulletin
- Publication Type :
- Academic Journal
- Accession number :
- 33549995
- Full Text :
- https://doi.org/10.1016/j.marpolbul.2021.112024