Nitrogen enrichment increases greenhouse gas emissions from emerged intertidal sandflats.

Show simple item record Hamilton, Dallas J en Bulmer, Richard H en Schwendenmann, Luitgard en Lundquist, Carolyn en 2020-06-15T23:06:30Z en 2020-04-21 en
dc.identifier.citation Scientific reports 10(1):6686 21 Apr 2020 en
dc.identifier.issn 2045-2322 en
dc.identifier.uri en
dc.description.abstract Unvegetated, intertidal sandflats play a critical role in estuarine carbon and nutrient dynamics. However, these ecosystems are under increasing threat from anthropogenic stressors, especially nitrogen enrichment. While research in this area typically focuses on sediment-water exchanges of carbon and nutrients during tidal inundation, there remain significant gaps in our understanding of GHG (Greenhouse Gas) fluxes during tidal emergence. Here we use in situ benthic chambers to quantify GHG fluxes during tidal emergence and investigate the impact of nitrogen enrichment on these fluxes. Our results demonstrate significant differences in magnitude and direction of GHG fluxes between emerged and submerged flats, demonstrating the importance of considering tidal state when estimating GHG emissions from intertidal flats. These responses were related to differences in microphytobenthic and macrofaunal activity, illustrating the important role of ecology in mediating fluxes from intertidal flats. Our results further demonstrate that nitrogen enrichment of 600 gN m-2 was associated with, on average, a 1.65x increase in CO2 uptake under light (photosynthetically active) conditions and a 1.35x increase in CO2 emission under dark conditions, a 3.8x increase in CH4 emission and a 15x increase in N2O emission overall. This is particularly significant given the large area intertidal flats cover globally, and their increasing exposure to anthropogenic stressors. en
dc.format.medium Electronic en
dc.language eng en
dc.relation.ispartofseries Scientific reports en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri en
dc.rights.uri en
dc.rights.uri en
dc.title Nitrogen enrichment increases greenhouse gas emissions from emerged intertidal sandflats. en
dc.type Journal Article en
dc.identifier.doi 10.1038/s41598-020-62215-4 en
pubs.issue 1 en
pubs.begin-page 6686 en
pubs.volume 10 en
dc.rights.holder Copyright: The author en
pubs.publication-status Published en
dc.rights.accessrights en
pubs.subtype research-article en
pubs.subtype Journal Article en
pubs.elements-id 800693 en Science en Marine Science en School of Environment en
dc.identifier.eissn 2045-2322 en
pubs.record-created-at-source-date 2020-04-23 en
pubs.dimensions-id 32317656 en

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