Analysed Particulate Organic Matter data from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) cruise on the Algoa Voyage 239, May 2017 ...
Particulate Organic Matter data (stable isotope) for the Integrated Ecosystem Programme: Southern Benguela (IEP:SB): May 2017. IEP:SB focuses on the biologically productive, cold waters of the Benguela Current Large Marine Ecosystem, which are inherently variable on short time-scales and responsive...
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| Format: | Dataset |
| Language: | English |
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Department of Forestry, Fisheries and the Environment
2020
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.15493/dea.mims.605202 https://api.odp.saeon.ac.za/catalog/MIMS/go/10.15493/DEA.MIMS.605202 |
| Summary: | Particulate Organic Matter data (stable isotope) for the Integrated Ecosystem Programme: Southern Benguela (IEP:SB): May 2017. IEP:SB focuses on the biologically productive, cold waters of the Benguela Current Large Marine Ecosystem, which are inherently variable on short time-scales and responsive to changing weather patterns. The research aims to provide relevant, reliable and improved assessment of the ecosystem, in support of its effective management, preservation and conservation, so that South Africans can benefit from a healthy and well-functioning ocean environment. The overarching objective is to enhance understanding in process studies by assessing the importance, timing and magnitude of mechanisms and processes that influence the Southern Benguela ecosystem structure and functioning, including the climate variability. ... : Filters were combusted in a Flash 2000 organic Elemental Analyzer and the isotope ratios of the resulting gases (N2) analysed with an in-line Delta V Plus IRMS via a Conflo IV gas control unit. A blank combustion followed every filter sample to ensure carry over from one sample to the next is reduced as much as possible. Three in-house standards were run at regular intervals: Merck Gel, a proteinaceous gel produced by Merck with a δ15N of 7.5‰, Valine, a branch chain amino acid with a δ15N of 12.1‰ purchased from Sigma, and an NH4Cl standard, with a δ15N of -0.6‰. These standards have been calibrated against IAEA reference materials. The samples were run in batches of 30-50 samples with standards run after every 10 samples. The δ15N of PON on the filters was calculated using equation 1, with Rstandard being a N2 reference gas in this gas. ... |
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