Constructing Human Versus Non-Human Climate Migration in the Anthropocene: The Case of Migrating Polar Bears in Nunavut, Canada

2020 ◽  
Vol 1 (1) ◽  
pp. 2
Author(s):  
Julian Reid
Keyword(s):  
Polar Bears ◽  
Human Climate

Polar Bears Adrift

2008 ◽  
Vol 19 (2) ◽  
pp. 18-25
Author(s):  
Diane Cole
Keyword(s):  
Polar Bears

Aerial strip surveys of polar bears in the Barents Sea

1990 ◽  
Vol 8 (2) ◽  
pp. 309-311
Author(s):  
Øystein Wiig ◽  
Vidar Bakken
Keyword(s):  
Barents Sea ◽  
Polar Bears ◽  
The Barents Sea

scholarly journals Complete genomes of two extinct New Zealand passerines show responses to climate fluctuations but no evidence for genomic erosion prior to extinction

2019 ◽  
Vol 15 (9) ◽  
pp. 20190491 ◽  
Author(s):  
Nicolas Dussex ◽  
Johanna von Seth ◽  
Michael Knapp ◽  
Olga Kardailsky ◽  
Bruce C. Robertson ◽  
...  
Keyword(s):  
Climate Change ◽  
New Zealand ◽  
Human Impacts ◽  
Oceanic Islands ◽  
Genomic Diversity ◽  
Climate Fluctuations ◽  
Forest Clearing ◽  
Mammalian Predators ◽  
Demographic Trajectories ◽  
Human Climate

Human intervention, pre-human climate change (or a combination of both), as well as genetic effects, contribute to species extinctions. While many species from oceanic islands have gone extinct due to direct human impacts, the effects of pre-human climate change and human settlement on the genomic diversity of insular species and the role that loss of genomic diversity played in their extinctions remains largely unexplored. To address this question, we sequenced whole genomes of two extinct New Zealand passerines, the huia ( Heteralocha acutirostris ) and South Island kōkako ( Callaeas cinereus ). Both species showed similar demographic trajectories throughout the Pleistocene. However, the South Island kōkako continued to decline after the last glaciation, while the huia experienced some recovery. Moreover, there was no indication of inbreeding resulting from recent mating among closely related individuals in either species. This latter result indicates that population fragmentation associated with forest clearing by Maōri may not have been strong enough to lead to an increase in inbreeding and exposure to genomic erosion. While genomic erosion may not have directly contributed to their extinctions, further habitat fragmentation and the introduction of mammalian predators by Europeans may have been an important driver of extinction in huia and South Island kōkako.

Preppers, bunkers and emaciated polar bears

Nature ◽  
2020 ◽  
Vol 580 (7804) ◽  
pp. 450-451
Author(s):  
Caspar Henderson
Keyword(s):  
Polar Bears

Space-Use Strategy Is an Important Determinant of PCB Concentrations in Female Polar Bears in the Barents Sea

2003 ◽  
Vol 37 (21) ◽  
pp. 4919-4924 ◽  
Author(s):  
Gro H. Olsen ◽  
Mette Mauritzen ◽  
Andrew E. Derocher ◽  
Eugen G. Sørmo ◽  
Janneche U. Skaare ◽  
...  
Keyword(s):  
Barents Sea ◽  
Important Determinant ◽  
Space Use ◽  
Polar Bears ◽  
The Barents Sea

Relationships Between Plasma Levels of Organochlorines, Retinol and Thyroid Hormones from Polar Bears (Ursus maritimus) at Svalbard

2001 ◽  
Vol 62 (4) ◽  
pp. 227-241 ◽  
Author(s):  
Janneche Utne Skaare ◽  
Aksel Bernhoft ◽  
Øystein Wiig ◽  
Kaare R. Norum ◽  
Egil Haug ◽  
...  
Keyword(s):  
Thyroid Hormones ◽  
Plasma Levels ◽  
Ursus Maritimus ◽  
Polar Bears
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