Exton, Daniel A and Suggett, David J and Steinke, Michael and McGenity, Terry J (2012) Spatial and temporal variability of biogenic isoprene emissions from a temperate estuary. Global Biogeochemical Cycles, 26 (2). n/a-n/a. DOI https://doi.org/10.1029/2011gb004210
Exton, Daniel A and Suggett, David J and Steinke, Michael and McGenity, Terry J (2012) Spatial and temporal variability of biogenic isoprene emissions from a temperate estuary. Global Biogeochemical Cycles, 26 (2). n/a-n/a. DOI https://doi.org/10.1029/2011gb004210
Exton, Daniel A and Suggett, David J and Steinke, Michael and McGenity, Terry J (2012) Spatial and temporal variability of biogenic isoprene emissions from a temperate estuary. Global Biogeochemical Cycles, 26 (2). n/a-n/a. DOI https://doi.org/10.1029/2011gb004210
Abstract
[1] Isoprene is important for its atmospheric impacts and the ecophysiological benefits it affords to emitting organisms; however, isoprene emissions from marine systems remain vastly understudied compared to terrestrial systems. This study investigates for the first time drivers of isoprene production in a temperate estuary, and the role this production may play in enabling organisms to tolerate the inherently wide range of environmental conditions. Intertidal sediment cores as well as high and low tide water samples were collected from four sites along the Colne Estuary, UK, every six weeks over a year. Isoprene concentrations in the water were significantly higher at low than high tide, and decreased toward the mouth of the estuary; sediment production showed no spatial variability. Diel isoprene concentration increased with light availability and decreased with tidal height; nighttime production was 79% lower than daytime production. Seasonal isoprene production and water concentrations were highest for the warmest months, with production strongly correlated with light (r2 = 0.800) and temperature (r2 = 0.752). Intertidal microphytobenthic communities were found to be the primary source of isoprene, with tidal action acting as a concentrating factor for isoprene entering the water column. Using these data we estimated an annual production rate for this estuary of 681 μmol m−2 y−1. This value falls at the upper end of other marine estimates and highlights the potentially significant role of estuaries as isoprene sources. The control of estuarine isoprene production by environmental processes identified here further suggests that such emissions may be altered by future environmental change.
Item Type: | Article |
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Subjects: | Q Science > Q Science (General) Q Science > QR Microbiology |
Divisions: | Faculty of Science and Health Faculty of Science and Health > Life Sciences, School of |
SWORD Depositor: | Unnamed user with email elements@essex.ac.uk |
Depositing User: | Unnamed user with email elements@essex.ac.uk |
Date Deposited: | 31 Jan 2013 12:27 |
Last Modified: | 16 May 2024 16:13 |
URI: | http://repository.essex.ac.uk/id/eprint/5428 |
Available files
Filename: Exton 2012 Spatial and temporal variability of biogenic isoprene emissions from a temperate estuary GBC.pdf