Supplementary material from "Loss of connectivity among island-dwelling Peary caribou following sea ice decline"
Version 2 2016-09-20, 14:43
Version 1 2016-09-13, 07:41
Posted on 2016-09-20 - 14:43
Global warming threatens to reduce population connectivity for terrestrial wildlife through significant and rapid changes to sea ice. Using genetic fingerprinting, we contrast extant connectivity in island-dwelling Peary caribou in northern Canada with continental-migratory caribou. We next examined if sea-ice contractions in the last decades modulated population connectivity and explored the possible impact of future climate change on long-term connectivity among island caribou. We found a strong correlation between genetic and geodesic distances for both continental and Peary caribou, even after accounting for the possible effect of sea surface. Sea ice has thus been an effective corridor for Peary caribou, promoting inter-island connectivity and population mixing. Using a time series of remote sensing sea-ice data, we show that landscape resistance in the Canadian Arctic Archipelago has increased by approximately 15% since 1979 and may further increase by 20–77% by 2086 under a high-emission scenario (RCP8.5). Under the persistent increase in greenhouse gas concentrations, reduced connectivity may isolate island-dwelling caribou with potentially significant consequences for population viability.
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A. Jenkins, Deborah; Lecomte, Nicolas; A. Schaefer, James; Olsen, Steffen M.; Swingedouw, Didier; D. Côté, Steeve; et al. (2016). Supplementary material from "Loss of connectivity among island-dwelling Peary caribou following sea ice decline". The Royal Society. Collection. https://doi.org/10.6084/m9.figshare.c.3464550.v2
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AUTHORS (8)
DA
Deborah A. Jenkins
NL
Nicolas Lecomte
JA
James A. Schaefer
SO
Steffen M. Olsen
DS
Didier Swingedouw
SD
Steeve D. Côté
LP
Loïc Pellissier
GY
Glenn Yannic