Resource translocation drives δ13C fractionation during recovery from disturbance in giant kelp, Macrocystis pyrifera

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15 Scopus citations

Abstract

Resource allocation and translocation are fundamental physiological functions for autotrophs. The mobilization and use of resources drive population dynamics by regulating growth and recovery of individuals, but also influences ecosystem-level processes such as primary productivity and carbon cycling. This study provides the first observation of translocation-driven gradients of δ13C in macroalgae, a critically important phenomenon recognized in vascular plants for decades. A ~10‰ δ13C increase in new giant kelp (Macrocystis pyrifera) fronds relative to mature canopy blades was produced after 5 weeks following a biomass removal experiment, more than twice the variation typical for macroalgae. The observed δ13C patterns are consistent with tissue enrichment following resource translocation in vascular plants. The analogous source-sink relationships and consistent translocation patterns in Macrocystis and vascular plants suggest that translocation of stored resources is critical for structuring productivity and recovery from disturbance in important, habitat-forming macroalgae such as kelps and fucoids. © 2013 Phycological Society of America.
Original languageEnglish (US)
Pages (from-to)811-815
Number of pages5
JournalJournal of Phycology
Volume49
Issue number5
DOIs
StatePublished - Oct 1 2013
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-09-23

ASJC Scopus subject areas

  • Plant Science
  • Aquatic Science

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