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DNA analysis of surfactant-associated bacteria in a natural sea slick observed by TerraSAR-X and RADARSAT-2 over the Gulf of Mexico

Howe, Kathryn and Dean, Cayla and Kluge, John and Soloviev, Alexander and Tartar, Aurelien and Shivji, Mahmood and Lehner, Susanne and Shen, Hui and Perrie, William (2019) DNA analysis of surfactant-associated bacteria in a natural sea slick observed by TerraSAR-X and RADARSAT-2 over the Gulf of Mexico. International Journal of Remote Sensing. Taylor & Francis. ISSN 0143-1161

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The damping of short gravity-capillary waves (Bragg waves) due to surfactant accumulation under low wind speed conditions results in the formation of natural sea slicks. These slicks are detectable visually and in synthetic aperture radar (SAR) imagery. Surfactants are produced by natural life processes of many organisms, such as bacteria, phytoplankton, seaweed, and zooplankton. By using DNA analysis, we are able to determine the relative abundance of surfactant-associated bacteria in the sea surface microlayer and the subsurface water column. A method to reduce contamination of samples during collection, storage, and analysis (Kurata et al., 2016; Hamilton et al., 2015) has been implemented and advanced by increasing the number of successive samples and changing sample storage procedures. In this work, microlayer samples have been collected in the Gulf of Mexico during a research cruise (LASER) on the R/V F.G. Walton Smith during RADARSAT-2 and TerraSAR-X overpasses. We found that in slick areas surfactant-associated bacteria mostly reside in subsurface waters, producing surfactants, which move to the surface, accumulate on and enrich the sea surface microlayer. This is consistent with previous studies (Kurata et al., 2016; Hamilton et al., 2015) and with the experimental results of Cunliffe et al. (2010).

Item URL in elib:https://elib.dlr.de/114664/
Document Type:Article
Title:DNA analysis of surfactant-associated bacteria in a natural sea slick observed by TerraSAR-X and RADARSAT-2 over the Gulf of Mexico
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Howe, KathrynNova Southeastern UniversityUNSPECIFIED
Dean, CaylaNova Southeastern UniversityUNSPECIFIED
Kluge, JohnNova Southeastern UniversityUNSPECIFIED
Soloviev, Alexandernova southeastern university, usaUNSPECIFIED
Tartar, AurelienNova Southeastern UniversityUNSPECIFIED
Shivji, Mahmoodoceanographic center, nova southeastern university, diana beach, fl, usaUNSPECIFIED
Lehner, Susannesusanne.lehner (at) dlr.deUNSPECIFIED
Shen, Huifisheries & oceans canada and bedford institute of oceanography, dartmouth, ns, canadaUNSPECIFIED
Perrie, Williamfisheries and oceans canada, bedford institute of oceanography, nova scotia, canadaUNSPECIFIED
Journal or Publication Title:International Journal of Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Publisher:Taylor & Francis
Keywords:oceanography, SAR, microlayer, bacteria, DNA
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben hochauflösende Fernerkundungsverfahren
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Remote Sensing Technology Institute > Photogrammetry and Image Analysis
Deposited By: Zielske, Mandy
Deposited On:29 Nov 2017 16:08
Last Modified:31 Jul 2019 20:12

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