Arctic reindeer cool with snow, but not rain, study says

the number of calves per female Arctic reindeer fluctuateS sharply according to rainfall patterns
A reindeer walks on snow in Ny-Alesund in the Svalbard archipelago. Arctic reindeer have no problems with snowstorms but are badly affected by rain, a finding that has implications for assessing how climate change affects wildlife, a study says.

Arctic reindeer have no problems with snowstorms but are badly affected by rain, a finding that has implications for assessing how climate change affects wildlife, a study on Wednesday says.

Norwegian researchers looked at population figures for a well-studied species, the Svalbard reindeer (Rangifer tarandus platyrhynchus), which inhabits the island of Spitzbergen.

Over 17 years of observations, from 1995 to 2011, the number of calves per female fluctuated sharply according to during the November-April winter.

Similar rain-linked changes in population were found among a species called the sibling vole (Microtus levis), the only other herbivorous mammal on Spitzbergen.

The declines are attributed to a phenomenon called rain-on-snow, when rain percolates through the snow and then freezes on the ground.

This encloses heather, grass and other vegetation with a thick layer of ice, making it hard for the animals to eat.

The findings are important given that the Arctic circle is a hotspot for global warming, affecting not just overall temperatures but too.

The study appears in Biology Letters, published by Britain's Royal Society.

The Svalbard reindeer is a subspecies of reindeer which is smaller than its cousins on mainland Europe because of the more meagre of its habitat.

Males grow up to 90 kilos (198 pounds) and 1.6 metres (5.2 feet) long and females reach 70 kilos (154 pounds) and 1.5 metres (4.9 feet) in length, according to the Norwegian Polar Institute (www.npolar.no/en/species/svalbard-reindeer.html).


Explore further

Reindeer: have sweet tooth, easy to handle, will travel

(c) 2012 AFP

Citation: Arctic reindeer cool with snow, but not rain, study says (2012, September 26) retrieved 22 November 2019 from https://phys.org/news/2012-09-arctic-reindeer-cool.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
0 shares

Feedback to editors

User comments