Tipping elements in the Arctic marine ecosystem

Carlos Duarte*, Susana Agusti, Paul Wassmann, Jesus Arrieta, Miquel Alcaraz, Alexandra Camba, Núria Marbà, Iris E. Hendriks, Johnna Holding, Iñigo García-Zarandona, Emma Kritzberg, Dolors Vaqué

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

68 Scopus citations

Abstract

The Arctic marine ecosystem contains multiple elements that present alternative states. The most obvious of which is an Arctic Ocean largely covered by an ice sheet in summer versus one largely devoid of such cover. Ecosystems under pressure typically shift between such alternative states in an abrupt, rather than smooth manner, with the level of forcing required for shifting this status termed threshold or tipping point. Loss of Arctic ice due to anthropogenic climate change is accelerating, with the extent of Arctic sea ice displaying increased variance at present, a leading indicator of the proximity of a possible tipping point. Reduced ice extent is expected, in turn, to trigger a number of additional tipping elements, physical, chemical, and biological, in motion, with potentially large impacts on the Arctic marine ecosystem.

Original languageEnglish (US)
Pages (from-to)44-55
Number of pages12
JournalAmbio
Volume41
Issue number1
DOIs
StatePublished - Feb 1 2012

Keywords

  • Arctic
  • Ecosystem
  • Ice
  • Non-linearity
  • Plankton
  • Tipping points

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Environmental Chemistry
  • Ecology

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