2/13/2023 0 Comments Deuterium nmsWe determined the δ 13C values of lipids, phospholipids and biomarker fatty acids and used these to calculate isotopic differences compared to the whole-cell δ 13C values for eight phytoplankton classes, five bacterial taxa, and three types of terrestrial organic matter (two trees and one grass). Hence there is a critical need for improved methods for estimating the δ 13C ratios of phytoplankton, bacteria and terrestrial detritus from within mixed seston. Stable isotope mixing models in aquatic ecology require δ 13C values for food web end members such as phytoplankton and bacteria, however it is rarely possible to measure these directly.
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