Application of High-Temperature Combustion Method for Measuring Content of Organic Carbon in Faecal Pellets and Small-Sized (≤1 mm) Zooplankton

A. V. Drits; Дриц А. В.; N. A. Belayev; Беляев Н. А.; V. A. Karmanov; Карманов В. А.; M. V. Flint; Флинт М. В.

doi:10.31857/S0030157423010021

Application of High-Temperature Combustion Method for Measuring Content of Organic Carbon in Faecal Pellets and Small-Sized (≤1 mm) Zooplankton

作者: Drits A.V.¹, Belayev N.A.¹, Karmanov V.A.¹, Flint M.V.¹
隶属关系:
1. Shirshov Institute of Oceanology, Russian Academy of Sciences
期: 卷 63, 编号 1 (2023)
页面: 160-168
栏目: Instruments and methods
URL: https://journal-vniispk.ru/0030-1574/article/view/136232
DOI: https://doi.org/10.31857/S0030157423010021
EDN: https://elibrary.ru/AFELCX
ID: 136232

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Organic carbon of fecal pellets and small-sized (≤ 1mm) zooplankton was measured using a high- temperature combustion method. The method was adapted for measurements with Shimadzu TOC-VCPH analyzer equipped with a manual injection module. The range of carbon content values was 30–10 000 ng ind^–1. The samples for analysis were collected during the cruises of the R/V “Akademik Mstislav Keldysh”in the Kara Sea in 2019-2021. Relationship between body carbon (C, µg ind^-1) and prosome length (L, mm) of zooplankton describes by the equation С = 4.24 L^1.84, r²= 0.85, n = 46. Carbon of field collected fecal pellet varied from 9.4 до 102.9 µg С mm^–3. The carbon to chlorophyll a ratio of fecal pellets differed by more than two orders of magnitude. The highest values (542 and 736) were obtained in the bays of the Novaya Zemlya archipelago, the lowest (3–6) on the Kara sea shelf in June 2021 soon after ice melting. The perspectives of implication of high temperature combustion method for studies of zooplankton in situ feeding and to estimate the contribution made by pellets to POC vertical flux are discussed.

关键词

copepod, faecal pellet, organic carbon, high-temperature combustion method

参考

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