Some Tertiary and Quaternary geology of western Montana, northern Idaho, and eastern Washington

1912 ◽  
Vol 23 (1) ◽  
pp. 517-536 ◽  
Author(s):  
O. H. HERSHEY
Keyword(s):  
Quaternary Geology ◽  
Western Montana ◽  
Northern Idaho ◽  
Eastern Washington

Clonal diversity within and among introduced populations of the apomictic vine Bryonia alba (Cucurbitaceae)

2000 ◽  
Vol 78 (11) ◽  
pp. 1469-1481 ◽  
Author(s):  
Stephen J Novak ◽  
Richard N Mack
Keyword(s):  
United States ◽  
Clonal Diversity ◽  
Western Montana ◽  
Western United States ◽  
Single Population ◽  
Multiple Introductions ◽  
Introduced Populations ◽  
Northern Utah ◽  
Northern Idaho ◽  
Eastern Washington

Bryonia alba L. (Cucurbitaceae) is a herbaceous Eurasian vine that predominantly reproduces clonally (asexually) through apomixis. We assessed the magnitude and distribution of clonal diversity within and among 23 recently established populations of B. alba in its new range in the western United States, based on the distribution of multilocus isozyme genotypes. Fifty-two unique clones were detected: 30 in the nine populations from eastern Washington and northern Idaho, and the remaining 22 in 14 populations from western Montana, northern Utah, and southern Idaho. On average, each population of B. alba was composed of 6.4 clones, and the proportion of distinguishable clones was 0.275. Multilocus diversity (D) was 0.632 and multilocus evenness (E) was 0.556. Twenty-six of 52 clones (50%) were restricted to a single population, and, on average, each clone occurred in 2.83 populations. Compared with other clonally reproducing plant species, this vine possesses moderate to high levels of clonal diversity in its new range in the western United States. This diversity appears to be a consequence of the events associated with its introduction (including multiple introductions), founder effects, and the proportion of sexual to apomictic reproduction within populations.Key words: invasive vine, apomixis, multilocus genotypes, clonal diversity and evenness, Bryonia alba, Cucurbitaceae.

Compositional variability of Glacier Peak tephra and its stratigraphic significance

1978 ◽  
Vol 15 (10) ◽  
pp. 1554-1567 ◽  
Author(s):  
J. A. Westgate ◽  
M. E. Evans
Keyword(s):  
National Park ◽  
Western Montana ◽  
Violent Event ◽  
Age Composition ◽  
Relative Age ◽  
Palaeomagnetic Data ◽  
Tephra Layers ◽  
Compositional Variability ◽  
Northern Idaho ◽  
Eastern Washington

Glacier Peak Volcano erupted many times during the period from ~11 000 to ~13 000 years ago and produced at least Three widespread tephra layers that serve as valuable stratigraphic markers in northwestern United States and the adjacent plains of southwestern Canada. Each of these units can be recognized by their stratigraphic, petrographic, and chemical attributes.Tephra was shed over eastern Washington, northern Idaho, western Montana, and southernmost Alberta during each of the eruptions responsible for the older two units; the other layer was deposited during the youngest and most violent event that directed tephra to the southeast as far as Yellowstone National Park, ~950 km from the volcano.Chemical data on glass, hornblende, hypersthene, feldspar, magnetite, and ilmenite show a systematic and unidirectional trend in tephra composition with age; earlier eruptions produced slightly more acidic tephra. This age–composition relationship is confirmed by palaeomagnetic data obtained from 116 specimens collected from two 5 m thick sections. It should therefore be possible to determine the relative age of Glacier Peak tephra samples by their composition alone.The chronology of the Glacier Peak eruptive sequence is still poorly understood. This is especially true of the oldest unit which has so far only been found in southeastern Alberta. Proximal occurrences should be sought in the bogs of eastern Washington where prospects of preservation and age definition are optimised.

Geographic structure of sibling species and cytotypes of the Simulium arcticum complex (Diptera: Simuliidae) in rivers of central Idaho and southeastern Washington, United States of America

2018 ◽  
Vol 150 (3) ◽  
pp. 366-377 ◽  
Author(s):  
Gerald F. Shields ◽  
John P. Shields
Keyword(s):  
United States ◽  
Sibling Species ◽  
United States Of America ◽  
Polytene Chromosomes ◽  
Sensu Stricto ◽  
Western Montana ◽  
Geographic Structure ◽  
Northern Idaho ◽  
Eastern Washington ◽  
Central Idaho

AbstractWe made 37 collections and analysed the polytene chromosomes of salivary glands of 726 larvae of the Simulium arcticum Malloch (Diptera: Simuliidae) complex from 10 locations in an unstudied region from central Idaho and southeastern Washington, United States of America. We compared our results to previous population cytotaxonomic research on larvae of this complex from western Montana, northern Idaho, and eastern Washington, United States of America. We identified four sibling species, S. brevicercum Knowlton and Rowe, S. saxosum Adler, S. arcticum sensu stricto, S. apricarium Adler, Currie, and Wood; and three cytotypes, S. arcticum IIL-9, IIL-17, and IIL-79, previously described by us. We discovered a new cytotype, S. arcticum IIL-80, at three locations in the western region of our sample area. We also found combinational (ancestral) types between S. saxosum and S. arcticum sensu stricto and between S. saxosum and S. arcticum IIL-79, suggesting that ancestral populations of the complex still exist. Geographic structuring of these sibling species and cytotypes are documented given that S. saxosum occurred in western regions, S. arcticum IIL-79 in northeastern regions, and S. apricarium in southeastern regions of our study area.

Learning Disabilities and other Attributes as Factors in Delinquent Activities among Adolescents in a Nonurban Area

1987 ◽  
Vol 60 (1) ◽  
pp. 327-334 ◽  
Author(s):  
Fran Trocinsky Fleener
Keyword(s):  
Learning Disabilities ◽  
Learning Disability ◽  
White Male ◽  
Learning Disabled ◽  
Mathematics Skills ◽  
Poor Families ◽  
Delinquent Activity ◽  
And Mathematics ◽  
Northern Idaho ◽  
Eastern Washington

62% of 50 adjudicated delinquents in the Palouse area of eastern Washington and northern Idaho showed learning disabilities when tested. Among the learning disabled and nonlearning disabled delinquents, there was no difference in kind or seriousness of delinquent activity. The typical delinquent of the nonurban Palouse area tends to be white, male and has a learning disability. His reading and mathematics skills are at least two years below grade. His family is large; his real parents are divorced. He comes from a poorer economic and cultural background than do the nondelinquents. This analysis suggests that the academic treatment of the learning disabled youngster should not be ignored as a factor in delinquency, especially in economically and culturally poor families.

Effects of tillage practices on pea leaf weevil (Sitona lineatus L., Coleoptera: Curculionidae) biology and crop damage: A farm-scale study in the US Pacific Northwest

2012 ◽  
Vol 102 (6) ◽  
pp. 682-691 ◽  
Author(s):  
R.P. Hanavan ◽  
N.A. Bosque-Pérez
Keyword(s):  
Large Scale ◽  
Adult Emergence ◽  
Conventional Tillage ◽  
Crop Damage ◽  
Growth Stages ◽  
No Tillage ◽  
Feeding Damage ◽  
Northern Idaho ◽  
Eastern Washington ◽  
Pea Leaf Weevil

AbstractThe pea leaf weevil, Sitona lineatus L., is periodically a significant pest of pea, Pisum sativum L., in the Palouse region of northern Idaho and eastern Washington, USA. Previous on-station research demonstrated significantly greater adult pea leaf weevil colonization, immature survival, adult emergence and plant damage in conventional-tillage compared to no-tillage plots of pea. In experiments conducted during the 2006 and 2007 growing seasons, aerial and ground adult pea leaf weevil colonization of large-scale commercial pea fields under different tillage regimes in northern Idaho and eastern Washington was examined for the first time. Initial pea leaf weevil feeding damage, immature weevil densities and subsequent adult emergence from the fields were also assessed. During both years, significantly more adult pea leaf weevils were captured in conventional-tillage than in no-tillage fields during the crop establishment period in May. No-tillage soils remained wet longer in the spring and could not be planted by growers until later than conventional-tillage fields. Pea planted under conventional-tillage emerged earlier and had significantly greater feeding damage by the pea leaf weevil than no-tillage pea. Significantly, greater immature pea leaf weevil densities and subsequent adult emergence were observed in conventional-tillage than in no-tillage pea fields. Delayed development of root nodules in the cooler, moister conditions of no-tillage pea fields likely resulted in escape from attack and injury during the critical growth stages that ultimately influence yield. Results indicate that large-scale commercial no-tillage pea fields are less suitable for colonization and survival of the pea leaf weevil and suffer less weevil damage than fields under conventional tillage.

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