Enhanced rates of particulate organic matter remineralization by microzooplankton are diminished by added ballast minerals - Université de Bretagne Occidentale Access content directly
Journal Articles Biogeosciences Year : 2013

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

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.

Domains

Oceanography
Fichier principal
Vignette du fichier
bg-10-5755-2013.pdf (7.56 Mo) Télécharger le fichier
Origin Publisher files allowed on an open archive
Loading...

Dates and versions

hal-00926372 , version 1 (03-08-2020)

Licence

Identifiers

Cite

Frédéric A.C. Le Moigne, Morgane Gallinari, E. Laurenceau, Christina L. de La Rocha. Enhanced rates of particulate organic matter remineralization by microzooplankton are diminished by added ballast minerals. Biogeosciences, 2013, 10 (9), pp.5755-5765. ⟨10.5194/bg-10-5755-2013⟩. ⟨hal-00926372⟩
185 View
76 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More