Abstract:
:Climate warming is occurring at an unprecedented rate in the Arctic and is having profound effects on host-parasite interactions, including range expansion. Recently, two species of protostrongylid nematodes have emerged for the first time in muskoxen and caribou on Victoria Island in the western Canadian Arctic Archipelago. Umingmakstrongylus pallikuukensis, the muskox lungworm, was detected for the first time in 2008 in muskoxen at a community hunt on the southwest corner of the island and by 2012, it was found several hundred kilometers east in commercially harvested muskoxen near the town of Ikaluktutiak. In 2010, Varestrongylus sp., a recently discovered lungworm of caribou and muskoxen was found in muskoxen near Ikaluktutiak and has been found annually in this area since then. Whereas invasion of the island by U. pallikuukensis appears to have been mediated by stochastic movement of muskoxen from the mainland to the southwest corner of the island, Varestrongylus has likely been introduced at several times and locations by the seasonal migration of caribou between the island and the mainland. A newly permissive climate, now suitable for completion of the parasite life cycles in a single summer, likely facilitated the initial establishment and now drives range expansion for both parasites.
journal_name
Glob Chang Bioljournal_title
Global change biologyauthors
Kutz SJ,Checkley S,Verocai GG,Dumond M,Hoberg EP,Peacock R,Wu JP,Orsel K,Seegers K,Warren AL,Abrams Adoi
10.1111/gcb.12315subject
Has Abstractpub_date
2013-11-01 00:00:00pages
3254-62issue
11eissn
1354-1013issn
1365-2486journal_volume
19pub_type
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