Sea-ice induced growth decline in Arctic shrubs | Zendy

Mads C. Forchhammer | Zendy

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Sea-ice induced growth decline in Arctic shrubs

Author(s) -

Mads C. Forchhammer

Publication year - 2017

Publication title -

biology letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.596

H-Index - 110

eISSN - 1744-957X

pISSN - 1744-9561

DOI - 10.1098/rsbl.2017.0122

Subject(s) - tundra , arctic , sea ice , biology , arctic vegetation , arctic ice pack , productivity , ecology , dendrochronology , climate change , physical geography , oceanography , geography , geology , macroeconomics , economics , paleontology

Measures of increased tundra plant productivity have been associated with the accelerating retreat of the Arctic sea-ice. Emerging studies document opposite effects, advocating for a more complex relationship between the shrinking sea-ice and terrestrial plant productivity. I introduce an autoregressive plant growth model integrating effects of biological and climatic conditions for analysing individual ring-width growth time series. Using 128 specimens of Salix arctica , S. glauca and Betula nana sampled across Greenland to Svalbard, an overall negative effect of the retreating June sea-ice extent was found on the annual growth. The negative effect of the retreating June sea-ice was observed for younger individuals with large annual growth allocations and with little or no trade-off between previous and current year's growth.

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