Alaska research natural areas: 3. Serpentine slide.

Juday, Glen.

doi:10.2737/pnw-gtr-271

Cited by 2 publications

(2 citation statements)

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“…This is in line with observations in California, where at least 70 percent of reported asbestos occurrences are in altered ultramafic rock/serpentinite (Van Gosen and Clinkenbeard, 2011). There are undoubtedly numerous additional occurrences of asbestos in serpentinized ultramafic rocks in Alaska that are not listed in ARDF and MRDS data tables (for example, NOA at Serpentine Slide, Livengood C-1 and C-2 quadrangles; Juday, 1992). Due to the generalized nature of the USGS mapping (1:250,000 scale) on which this study's maps are based, and the small scale (1:500,000) of the maps produced for this project, not all of the ultramafic outcrops appear on the maps.…”

Section: Photo 2 Exploration Of the Slate Creek Chrysotile Asbestos supporting

confidence: 87%

Preliminary evaluation of bedrock potential for naturally occurring asbestos in Alaska

Solie¹

2015

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Section: Photo 2 Exploration Of the Slate Creek Chrysotile Asbestos supporting

confidence: 87%

Preliminary evaluation of bedrock potential for naturally occurring asbestos in Alaska

Solie¹

2015

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“…For example, a copepod, Heterocope septentrionalis, is reported in habitats from much of the area west of Hudson Bay. It occurs most commonly in arctic tundra pond habitats from Alaska and Yukon to western Hudson Bay (Juday and Muttkowski, 1915;Marsh, 1920;Hooper, 1947;Bardach, 1954;Reed, 1962Reed, , 1963Tash and Armitage, 1967;Tash, 1971). It has been also reported from interior British Columbia (Carl, 1940) and Saskatchewan (Wilson, 1958).…”

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confidence: 99%

Genetic Consequences of Passive Dispersal in Pond-Dwelling Copepods

Boileau¹

1991

Evolution

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Pond-dwelling copepods have colonized habitats throughout North America after glaciers have receded. Most species are passively transported via resting eggs into new habitats. Colonists originating in a glacial refugium could lose some of the ancestral genetic diversity when they establish new populations and the attenuation may be substantial in populations far removed from the refugium due to multiple founder events. Genetic variation was measured in Heterocope septentrionalis from 27 populations at arctic sites near potential refugia and those more recently deglaciated to determine the effects of postglacial dispersal on patterns of genetic relatedness and diversity. Some populations were more distant, genetically, from others within the same site than those from other more distant sites. Eleven polymorphic enzyme loci were significantly more variable (F [1,294 df] = 5.94, P < 0.025) among individuals from populations near the Alaskan refuge than those at the eastern limit of their distribution. Because populations are typically extremely large and stable this loss of genetic diversity is attributed primarily to repeated founder events during colonization. This result suggests profound genetic changes may occur on a continental scale in passively dispersed copepods due to founder events alone. Their potential for divergence and speciation is greater than currently recognized.

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Alaska research natural areas: 3. Serpentine slide.

Abstract: This file was created by scanning the printed publication. Misscans identified by the software have been corrected; however, some mistakes may remain.

Cited by 2 publications

References 5 publications

Preliminary evaluation of bedrock potential for naturally occurring asbestos in Alaska

Preliminary evaluation of bedrock potential for naturally occurring asbestos in Alaska

Genetic Consequences of Passive Dispersal in Pond-Dwelling Copepods

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