Climate change reduces reproductive success of an Arctic herbivore through trophic mismatch

Eric S Post, Mads C. Forchhammer

Research output: Contribution to journalArticle

298 Citations (Scopus)

Abstract

In highly seasonal environments, offspring production by vertebrates is timed to coincide with the annual peak of resource availability. For herbivores, this resource peak is represented by the annual onset and progression of the plant growth season. As plant phenology advances in response to climatic warming, there is potential for development of a mismatch between the peak of resource demands by reproducing herbivores and the peak of resource availability. For migratory herbivores, such as caribou, development of a trophic mismatch is particularly likely because the timing of their seasonal migration to summer ranges, where calves are born, is cued by changes in day length, while onset of the plant-growing season on the same ranges is cued by local temperatures. Using data collected since 1993 on timing of calving by caribou and timing of plant growth in West Greenland, we document the consequences for reproductive success of a developing trophic mismatch between caribou and their forage plants. As mean spring temperatures at our study site have risen by more than 4°C, caribou have not kept pace with advancement of the plant-growing season on their calving range. As a consequence, offspring mortality has risen and offspring production has dropped fourfold.

Original languageEnglish (US)
Pages (from-to)2369-2375
Number of pages7
JournalPhilosophical Transactions of the Royal Society B: Biological Sciences
Volume363
Issue number1501
DOIs
StatePublished - Jul 12 2008

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Herbivory
Rangifer tarandus
Climate Change
Climate change
Reindeer
Arctic region
herbivores
Availability
climate change
calving
growing season
plant growth
Temperature
Greenland
migratory behavior
global warming
phenology
temperature
photoperiod
vertebrates

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

Cite this

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Climate change reduces reproductive success of an Arctic herbivore through trophic mismatch. / Post, Eric S; Forchhammer, Mads C.

In: Philosophical Transactions of the Royal Society B: Biological Sciences, Vol. 363, No. 1501, 12.07.2008, p. 2369-2375.

Research output: Contribution to journalArticle

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