scholarly journals Regional climatic warming and associated twentieth century land-cover changes in north-western North America

1999 ◽  
Vol 12 ◽  
pp. 39-52 ◽  
Author(s):  
WR Skinner ◽  
JA Majorowicz
Keyword(s):  
Twentieth Century ◽  
North America ◽  
Land Cover ◽  
Land Cover Changes ◽  
Western North America ◽  
Climatic Warming ◽  
North Western

The climate space of fire regimes in north-western North America

2015 ◽  
Vol 42 (9) ◽  
pp. 1736-1749 ◽  
Author(s):  
Ellen Whitman ◽  
Enric Batllori ◽  
Marc-André Parisien ◽  
Carol Miller ◽  
Jonathan D. Coop ◽  
...  
Keyword(s):  
North America ◽  
Fire Regimes ◽  
Western North America ◽  
Climate Space ◽  
North Western

The Galium trifidum group (Galium sect. Aparinoides, Rubiaceae)

1976 ◽  
Vol 54 (16) ◽  
pp. 1911-1925 ◽  
Author(s):  
C. Puff
Keyword(s):  
North America ◽  
Eastern North America ◽  
Great Lakes Region ◽  
Western North America ◽  
Eastern Asia ◽  
Chromosome Counts ◽  
New Classification ◽  
North Eastern ◽  
North Western

By using morphology, karyology, pollen size, leaf flavonoids, ecological observations, and modification experiments, a new classification of the Galium trifidum group is proposed. Nine taxa in five species are recognized: (1) G. tinctorium, with ssp. tinctorium and sap. floridanum (new comb.) in eastern North America; (2) G. brevipes, a rare species centered in the Great Lakes region; (3) G. trifidum, with ssp. trifidum in northern North America. Asia, and Europe, ssp. columbianum (new comb.) in (north)western North America and (north)eastern Asia, and ssp. subbiflorum (new comb.) and ssp. halophilum (new comb.) in northern North America; (4) G. innocuum in southeastern Asia; (5) G. karakulense in central Asia.New chromosome counts of n = 12 and 2n = 24 are reported for G. tinctorium ssp. tinctorium and ssp. floridanum; and G. trifidum ssp. trifidum, ssp. columbianum, and ssp. subbiflorum.

Colorado tick fever and other arthropod-borne reoviruses

2020 ◽  
pp. 819-821
Author(s):  
Mary J. Warrell ◽  
David A. Warrell
Keyword(s):  
North America ◽  
Viral Antigen ◽  
Gastrointestinal Symptoms ◽  
Available P ◽  
Western North America ◽  
Human Pathogens ◽  
Salmon River ◽  
Banna Virus ◽  
North Western

Human pathogens are found in six genera of Reoviridae: Reovirus, Rotavirus, Orthoreovirus, and three arthropod-borne genera: Coltivirus (Colorado tick fever, Salmon River virus, and Eyach viruses); Orbivirus (Kemerovo, Changuinola, Orungo, and Lebombo); and Seadornavirus (Banna virus). Colorado tick fever is common in parts of north-western North America; acquired from tick (ixodid) bites, most often by hikers and campers, presenting 3–6 days later with sudden fever, rigors, generalized aches, myalgia, headache and backache, rashes (12%), and gastrointestinal symptoms (20%). Diagnosis is confirmed by detection of viral antigen in erythrocytes or serum, or by serodiagnosis. Management is symptomatic. Illness usually resolves in 10–14 days, but convalescence may be prolonged. Prevention is by avoiding, repelling, and rapidly removing ticks; no vaccines are available.

Lecania fructigena Zahlbr., a coastal saxicolous lichen, new for Europe, with notes on related species

2005 ◽  
Vol 37 (4) ◽  
pp. 277-283 ◽  
Author(s):  
Pieter P. G. van den BOOM ◽  
A. Maarten BRAND
Keyword(s):  
North America ◽  
Related Species ◽  
Western Europe ◽  
Western North America ◽  
Western Mexico ◽  
North Western

Lecania fructigena has been found in western Europe. This species, previously known only from western North America and north-western Mexico, is described and compared with related species. It is easily overlooked for L. aipospila. Lecania sampaiana is a synonym of L. aipospila.

Genetic Variability and its Geographical Distribution in the Widely Disjunct Cavernularia Hultenii

2002 ◽  
Vol 34 (2) ◽  
pp. 101-111 ◽  
Author(s):  
C. Printzen ◽  
S. Ekman
Keyword(s):  
North America ◽  
Dna Sequences ◽  
Western Europe ◽  
Disjunct Distribution ◽  
Western North America ◽  
Pleistocene Glaciations ◽  
Postglacial Expansion ◽  
Nuclear Its ◽  
Fruticose Lichen ◽  
North Western

AbstractThe fruticose lichen Cavernularia hultenii exhibits a strongly disjunct distribution between north-western North America, Newfoundland and north-western Europe. An investigation of its population structure, based on nuclear ITS and IGS DNA sequences, shows that western North America has a higher number of haplotypes than the two other areas. Most of the haplotypes confined to this region are rare and occur outside the area that was affected by Pleistocene glaciations. Three haplotypes are common in all three areas. The high number of haplotypes in western North America might be due to a combination of events during the Pleistocene and Holocene epochs, viz. increased lineage survival by repeated fragmentation of populations and reduced lineage extinction through rapid postglacial expansion and population growth.

Colorado tick fever and other arthropod-borne reoviruses

2010 ◽  
pp. 555-556
Author(s):  
M.J. Warrell ◽  
David A. Warrell
Keyword(s):  
North America ◽  
Viral Antigen ◽  
Gastrointestinal Symptoms ◽  
Available P ◽  
Western North America ◽  
Human Pathogens ◽  
Salmon River ◽  
Banna Virus ◽  
North Western

Human pathogens are found in six genera of Reoviridae: Reovirus, Rotavirus, Orthoreovirus, and three arthropod-borne genera—Coltivirus (Colorado tick fever, Salmon River virus, and Eyach viruses), Orbivirus (Kemerovo, Changuinola, Orungo, and Lebombo) and Seadornavirus (Banna virus). Colorado tick fever—common in parts of north-western North America; acquired from tick (ixodid) bites, most often by hikers and campers, presenting 3 to 6 days later with sudden fever, rigors, generalized aches, myalgia, headache and backache, rashes (12%) and gastrointestinal symptoms (20%). Diagnosis confirmed by detection of viral antigen in erythrocytes or serum, or by serodiagnosis. Management is symptomatic. Illness usually resolves in 10 to 14 days, but convalescence may be prolonged. Prevention is by avoiding, repelling, and rapidly removing ticks; no vaccines are available....

Decreasing Reliability and Increasing Synchroneity of Western North American Streamflow

2005 ◽  
Vol 18 (5) ◽  
pp. 613-618 ◽  
Author(s):  
Shaleen Jain ◽  
Martin Hoerling ◽  
Jon Eischeid
Keyword(s):  
Twentieth Century ◽  
Water Resources ◽  
North America ◽  
Atmospheric Circulation ◽  
River Basins ◽  
Western North America ◽  
Hydrologic Change ◽  
Late Twentieth ◽  
Major River ◽  
Late Twentieth Century

Abstract Assessing climate-related societal vulnerability and mitigating impacts requires timely diagnosis of the nature of regional hydrologic change. A late-twentieth-century emergent trend is discovered toward increasing year-to-year variance (decreasing reliability) of streamflow across the major river basins in western North America—–Fraser, Columbia, Sacramento–San Joaquin, and Upper Colorado. Simultaneously, a disproportionate increase in the incidence of synchronous flows (simultaneous high or low flows across all four river basins) has resulted in expansive water resources stress. The observed trends have analogs in wintertime atmospheric circulation regimes and ocean temperatures, raising new questions on the detection, attribution, and projection of regional hydrologic change induced by climate.

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