Copepod grazing and the biogeochemical fate of diatom iron

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)989-994
Journal / PublicationLimnology and Oceanography
Volume40
Issue number5
Publication statusPublished - Jul 1995
Externally publishedYes

Abstract

We investigated the effects of copepod grazing on fractionation of diatom cellular Fe into assimilated, dissolved, and fecal pellet pools. Grazer assimilation was only weakly dependent on prey N: Fe ratios, with assimilation efficiencies approximately tripling over a 100‐fold increase in diatom N: Fe ratios. Assimilation efficiencies strongly correlated with prey subcellular partitioning, however, exhibiting a 1 : 1 relationship to cell cytoplasmic content and a 1 : 3 relationship with diatom intracellular content. Release of Fe from copepod fecal pellets conformed with a two‐compartment loss model, with roughly 80% of associated Fe in a slowly released pool (tb½ = 113 d). Partitioning into dissolved, assimilated, and fecal pellet pools indicated that all three are important fates for ingested cellular Fe.

Citation Format(s)

Copepod grazing and the biogeochemical fate of diatom iron. / Hutchins, David A.; Wang, Wen-Xiong; Fisher, Nicholas S.

In: Limnology and Oceanography, Vol. 40, No. 5, 07.1995, p. 989-994.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review