eCite Digital Repository

Enhanced rates of particulate organic matter remineralization by microzooplankton are diminished by added ballast minerals

Citation

Le Moigne, FAC and Gallinari, M and Laurenceau, E and De La Rocha, CL, Enhanced rates of particulate organic matter remineralization by microzooplankton are diminished by added ballast minerals, Biogeosciences, 10, (9) pp. 5755-5765. ISSN 1726-4170 (2013) [Refereed Article]


Preview
PDF
8Mb
  

Copyright Statement

Licensed under Creative Commons Attribution 3.0 Unported http://creativecommons.org/licenses/by/3.0/legalcode

DOI: doi:10.5194/bg-10-5755-2013

Abstract

To examine the potentially competing influences of microzooplankton and calcite mineral ballast on organic matter remineralization, we incubated diatoms in darkness in rolling tanks with and without added calcite minerals (coccoliths) and microzooplankton (rotifers). Concentrations of particulate organic matter (POM in suspension or in aggregates), of dissolved organic matter (DOM), and of dissolved inorganic nutrients were monitored over 8 days. The presence of rotifers enhanced the remineralization of ammonium and phosphate, but not dissolved silicon, from the biogenic particulate matter, up to 40% of which became incorporated into aggregates early in the experiment. Added calcite resulted in rates of excretion of ammonium and phosphate by rotifers that were depressed by 67% and 36%, respectively, demonstrating the potential for minerals to inhibit the destruction of POM by zooplankton in the water column. Lastly, the presence of the rotifers and added calcite minerals resulted in a more rapid initial rate of aggregation, although not a greater overall amount of aggregation during the experiment.

Item Details

Item Type:Refereed Article
Keywords:remineralization, microzooplankton, ballast minerals
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Biological Oceanography
Objective Division:Environment
Objective Group:Other Environment
Objective Field:Antarctic and Sub-Antarctic Oceanography
Author:Laurenceau, E (Mr Emmanuel Laurenceau)
ID Code:88771
Year Published:2013
Web of Science® Times Cited:10
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2014-02-14
Last Modified:2017-10-31
Downloads:333 View Download Statistics

Repository Staff Only: item control page