Статті в журналах: "Pacific Northwest America"

1

Behan-Pelletier, Valerie M., Barbara Eamer, and Marilyn Clayton. "Mycobatidae (Acari: Oribatida) of Pacific Northwest canopy habitats." Canadian Entomologist 133, no. 6 (December 2001): 755–75. http://dx.doi.org/10.4039/ent133755-6.

Повний текст джерела

Анотація:

AbstractThree new species of oribatid mites in two genera of Mycobatidae are recorded from canopy habitats of coniferous temperate rainforest and montane forest in the Pacific Northwest of North America. These species, Mycobates acuspidatussp.nov., M. corticeussp.nov., and Zachvatkinibates epiphytossp.nov., are described on the basis of adults and immatures. The previous key for adult Mycobates species of America north of Mexico is modified to include these new species, and a key for adults is given for the three species of Zachvatkinibates now known from North America.

Стилі APA, Harvard, Vancouver, ISO та ін.

2

Coppins, B. J., and T. Tønsberg. "A New Xanthone-Containing Micarea from Northwest Europe and the Pacific Northwest of North America." Lichenologist 33, no. 2 (March 2001): 93–96. http://dx.doi.org/10.1006/lich.2000.0311.

Повний текст джерела

Анотація:

AbstractMicarea xanthonica sp. nov. is described from the western British Isles, westernmost Norway and the Pacific Northwest of North America. It belongs to the M. prasina group, but differs from related species in possessing xanthones in the thallus.

Стилі APA, Harvard, Vancouver, ISO та ін.

3

Nolasco, Ana laura, Ivan Lira, and Gerardo Ceballos González. "Ampliacíon en la distribución histórica del tapir (Tapirus bairdii) en el Pacífico Mexicano." Revista Mexicana de Mastozoología (Nueva Epoca) 11, no. 1 (January 1, 2007): 91. http://dx.doi.org/10.22201/ie.20074484e.2007.11.1.134.

Повний текст джерела

Анотація:

Abstract: We present a historic record from Acapulco, Guerrero, of Central American tapir (Tapirus bairdii) that represent the northernmost record in the Pacific coast of Mexico and North America. This report extends the current distribution 238 km to the northwest of its known geographic range. Key Words: Tapirus bairdii, Guerrero, New Historical Record.

Стилі APA, Harvard, Vancouver, ISO та ін.

4

Datta, Kausik, Karen H. Bartlett, and Kieren A. Marr. "Cryptococcus gattii: Emergence in Western North America: Exploitation of a Novel Ecological Niche." Interdisciplinary Perspectives on Infectious Diseases 2009 (2009): 1–8. http://dx.doi.org/10.1155/2009/176532.

Повний текст джерела

Анотація:

The relatively uncommon fungal pathogenCryptococcus gattiirecently emerged as a significant cause of cryptococcal disease in human and animals in the Pacific Northwest of North America. Although genetic studies indicated its possible presence in the Pacific Northwest for more than 30 years,C. gattiias an etiological agent was largely unknown in this region prior to 1999. The recent emergence may have been encouraged by changing conditions of climate or land use and/or host susceptibility, and predictive ecological niche modeling indicates a potentially wider spread.C. gattiican survive wide climatic variations and colonize the environment in tropical, subtropical, temperate, and dry climates. Long-term climate changes, such as the significantly elevated global temperature in the last 100 years, influence patterns of disease among plants and animals and create niche microclimates habitable by emerging pathogens.C. gattiimay have exploited such a hitherto unrecognized but clement environment in the Pacific Northwest to provide a wider exposure and risk of infection to human and animal populations.

Стилі APA, Harvard, Vancouver, ISO та ін.

5

McMurdie, Lynn A., and Joseph H. Casola. "Weather Regimes and Forecast Errors in the Pacific Northwest." Weather and Forecasting 24, no. 3 (June 1, 2009): 829–42. http://dx.doi.org/10.1175/2008waf2222172.1.

Повний текст джерела

Анотація:

Abstract Despite overall improvements in numerical weather prediction and data assimilation, large short-term forecast errors of sea level pressure and 2-m temperature still occur. This is especially true for the west coast of North America where short-term numerical weather forecasts of surface low pressure systems can have large position and central pressure errors. In this study, forecast errors of sea level pressure and temperature in the Pacific Northwest are related to the shape of the large-scale flow aloft. Applying a hierarchical limited-contour clustering algorithm to historical 500-hPa geopotential height data produces four distinct weather regimes. The Rockies ridge regime, which exhibits a ridge near the axis of the Rocky Mountains and nearly zonal flow across the Pacific, experiences the highest magnitude and frequency of large sea level pressure errors. On the other hand, the coastal ridge regime, which exhibits a ridge aligned with the North American west coast, experiences the highest magnitude and frequency of large 2-m minimum temperature errors.

Стилі APA, Harvard, Vancouver, ISO та ін.

6

Glawe, Dean A. "First Report of Powdery Mildew of Lycium chinense (Chinese Matrimony Vine) Caused by Arthrocladiella mougeotii in the Pacific Northwest." Plant Health Progress 5, no. 1 (January 2004): 16. http://dx.doi.org/10.1094/php-2004-1208-01-hn.

Повний текст джерела

Анотація:

Chinese matrimony-vine (Lycium chinense Mill.) is a traditional medicinal plant grown in China and used as a perennial landscape plant in North America. This report documents the presence of powdery mildew on L. chinense in the Pacific Northwest and describes and illustrates morphological features of the causal agent. It appears to be the first report of a powdery mildew caused by Arthrocladiella in the Pacific Northwest. Accepted for publication 10 November 2004. Published 8 December 2004.

Стилі APA, Harvard, Vancouver, ISO та ін.

7

Bhat, B. K., and G. Y. Lemma. "1056 POTENTIAL OF PYRETHRUM PRODUCTION IN PACIFIC NORTHWEST." HortScience 29, no. 5 (May 1994): 580a—580. http://dx.doi.org/10.21273/hortsci.29.5.580a.

Повний текст джерела

Анотація:

Pyrethrins is one of the safest natural insecticides known to man that is least toxic to all warm blooded animals but highly-toxic to a wide range of insect species. The insecticide is extracted from the flowers of pyrethrum (Chrysanthemum cinerariaefolium Vis). United States of America consumes almost 85 per cent of the World production of pyrethrins imported from countries like Kenya, Tanzania, Australia and others. The paper discusses the potential of commercial pyrethrum production in the U.S.A., especially in the states of Washington, Oregon, and California.

Стилі APA, Harvard, Vancouver, ISO та ін.

8

Lindo, John, Alessandro Achilli, Ugo A. Perego, David Archer, Cristina Valdiosera, Barbara Petzelt, Joycelynn Mitchell, et al. "Ancient individuals from the North American Northwest Coast reveal 10,000 years of regional genetic continuity." Proceedings of the National Academy of Sciences 114, no. 16 (April 4, 2017): 4093–98. http://dx.doi.org/10.1073/pnas.1620410114.

Повний текст джерела

Анотація:

Recent genomic studies of both ancient and modern indigenous people of the Americas have shed light on the demographic processes involved during the first peopling. The Pacific Northwest Coast proves an intriguing focus for these studies because of its association with coastal migration models and genetic ancestral patterns that are difficult to reconcile with modern DNA alone. Here, we report the low-coverage genome sequence of an ancient individual known as “Shuká Káa” (“Man Ahead of Us”) recovered from the On Your Knees Cave (OYKC) in southeastern Alaska (archaeological site 49-PET-408). The human remains date to ∼10,300 calendar (cal) y B.P. We also analyze low-coverage genomes of three more recent individuals from the nearby coast of British Columbia dating from ∼6,075 to 1,750 cal y B.P. From the resulting time series of genetic data, we show that the Pacific Northwest Coast exhibits genetic continuity for at least the past 10,300 cal y B.P. We also infer that population structure existed in the late Pleistocene of North America with Shuká Káa on a different ancestral line compared with other North American individuals from the late Pleistocene or early Holocene (i.e., Anzick-1 and Kennewick Man). Despite regional shifts in mtDNA haplogroups, we conclude from individuals sampled through time that people of the northern Northwest Coast belong to an early genetic lineage that may stem from a late Pleistocene coastal migration into the Americas.

Стилі APA, Harvard, Vancouver, ISO та ін.

9

Smith, Shannon E., Rob Douglas, Karen Burke da Silva, and Billie J. Swalla. "Morphological and molecular identification of Saccoglossus species (Hemichordata: Harrimaniidae) in the Pacific Northwest." Canadian Journal of Zoology 81, no. 1 (January 1, 2003): 133–41. http://dx.doi.org/10.1139/z02-228.

Повний текст джерела

Анотація:

Hemichordates, especially enteropneust worms, have become increasingly important in phylogenetic studies to test theories of chordate evolution. However, there are many populations of enteropneusts along the Pacific Northwest coast of North America that have not been identified. Here we show that two common Pacific Northwest enteropneust species, Saccoglossus pusillus and Saccoglossus bromophenolosus, can be distinguished by both morphological and molecular characters, and we identify several populations of both species. We compare them with a closely related species, Saccoglossus kowalevskii, from the Atlantic coast of North America. We compile the morphological characters used to distinguish harrimaniid enteropneusts, and we describe a new staining method to examine the gill bars and proboscis skeleton of enteropneusts to aid in identification. Using 18S and 16S ribosomal DNA sequences, we determine that the range of S. pusillus extends from southern California, where the worm was first identified, to southern Canada. This previously unknown large range shows a dramatic geographic cline in adult body size, with the smallest populations found in the south and the largest adults near Vancouver Island. In contrast, S. bromophenolosus may be a Pacific Northwest species that was relatively recently introduced from the Atlantic Ocean.

Стилі APA, Harvard, Vancouver, ISO та ін.

10

Moore, Nicole E., and Lynn Robinson. "The Role of Subduction Zone Processes in the Cultural History of the Cascade Region." Elements 18, no. 4 (August 1, 2022): 246–50. http://dx.doi.org/10.2138/gselements.18.4.246.

Повний текст джерела

Анотація:

The Cascadia subduction zone continuously shapes the landscape of the Pacific Northwest of North America and the cultures of its inhabitants. The impacts of subduction processes on Pacific Northwest societies and cultures are varied, but Native Americans and European settler cultures alike have described geological processes through oral histories and have relied on resources provided by the subduction zone. Indigenous peoples focus many aspects of their religious practices and art around the geohazards of the Cascadia region, and our melded modern cultures continue to take part in storytelling related to subduction zone hazards through movies and other forms of narration.

Стилі APA, Harvard, Vancouver, ISO та ін.

11

Nuytinck, Jorinde, and Joseph F. Ammirati. "A new species of Lactarius sect. Deliciosi (Russulales, Basidiomycota) from western North America." Botany 92, no. 10 (October 2014): 767–74. http://dx.doi.org/10.1139/cjb-2014-0102.

Повний текст джерела

Анотація:

Although Lactarius sect. Deliciosi (Fr.) Redeuilh, Verbeken & Walleyn (syn. Lactarius sect. Dapetes) is a readily identifiable group in the field, it is exceedingly difficult to correctly identify species with orange to reddish orange latex. A lack of careful study of these species in North America in general, and the Pacific Northwest more specifically, makes species identification often impossible. One common undescribed Pacific Northwest species, which begins fruiting rather early in the season, is described here as Lactarius aestivus sp. nov. It is found in conifer forests dominated by Abies Mill. and Tsuga Carrière, and is characterized by bright orange latex and zonate, bright to pale orange pileus that only rarely stains greenish. A phylogenetic analysis based on ITS sequences supports the species delimitation.

Стилі APA, Harvard, Vancouver, ISO та ін.

12

McCaffrey, Robert, Anthony I. Qamar, Robert W. King, Ray Wells, Giorgi Khazaradze, Charles A. Williams, Colleen W. Stevens, Jesse J. Vollick, and Peter C. Zwick. "Fault locking, block rotation and crustal deformation in the Pacific Northwest." Geophysical Journal International 169, no. 3 (June 1, 2007): 1315–40. http://dx.doi.org/10.1111/j.1365-246x.2007.03371.x.

Повний текст джерела

Анотація:

Summary We interpret Global Positioning System (GPS) measurements in the northwestern United States and adjacent parts of western Canada to describe relative motions of crustal blocks, locking on faults and permanent deformation associated with convergence between the Juan de Fuca and North American plates. To estimate angular velocities of the oceanic Juan de Fuca and Explorer plates and several continental crustal blocks, we invert the GPS velocities together with seafloor spreading rates, earthquake slip vector azimuths and fault slip azimuths and rates. We also determine the degree to which faults are either creeping aseismically or, alternatively, locked on the block-bounding faults. The Cascadia subduction thrust is locked mainly offshore, except in central Oregon, where locking extends inland. Most of Oregon and southwest Washington rotate clockwise relative to North America at rates of 0.4–1.0 ° Myr−1. No shear or extension along the Cascades volcanic arc has occurred at the mm/yr level during the past decade, suggesting that the shear deformation extending northward from the Walker Lane and eastern California shear zone south of Oregon is largely accommodated by block rotation in Oregon. The general agreement of vertical axis rotation rates derived from GPS velocities with those estimated from palaeomagnetic declination anomalies suggests that the rotations have been relatively steady for 10–15 Ma. Additional permanent dextral shear is indicated within the Oregon Coast Range near the coast. Block rotations in the Pacific Northwest do not result in net westward flux of crustal material—the crust is simply spinning and not escaping. On Vancouver Island, where the convergence obliquity is less than in Oregon and Washington, the contractional strain at the coast is more aligned with Juan de Fuca—North America motion. GPS velocities are fit significantly better when Vancouver Island and the southern Coast Mountains move relative to North America in a block-like fashion. The relative motions of the Oregon, western Washington and Vancouver Island crustal blocks indicate that the rate of permanent shortening, the type that causes upper plate earthquakes, across the Puget Sound region is 4.4 ± 0.3 mm yr−1. This shortening is likely distributed over several faults but GPS data alone cannot determine the partitioning of slip on them. The transition from predominantly shear deformation within the continent south of the Mendocino Triple Junction to predominantly block rotations north of it is similar to changes in tectonic style at other transitions from shear to subduction. This similarity suggests that crustal block rotations are enhanced in the vicinity of subduction zones possibly due to lower resisting stress.

Стилі APA, Harvard, Vancouver, ISO та ін.

13

Neumann, Gregory A., and John F. Hermance. "The geomagnetic coast effect in the Pacific Northwest of North America." Geophysical Research Letters 12, no. 8 (August 1985): 502–5. http://dx.doi.org/10.1029/gl012i008p00502.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

14

Zika, Peter F. "Impatiens ×pacifica (Balsaminaceae), a New Hybrid Jewelweed from the Pacific Northwest Coast of North America." Novon: A Journal for Botanical Nomenclature 16, no. 3 (September 2006): 443–48. http://dx.doi.org/10.3417/1055-3177(2006)16[443:ipbanh]2.0.co;2.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

15

PIERCEY-NORMORE, Michele D., Darwyn COXSON, Trevor GOWARD, and Bernard GOFFINET. "Phylogenetic position of a Pacific Northwest North American endemic cyanolichen, Nephroma occultum (Ascomycota, Peltigerales)." Lichenologist 38, no. 5 (August 22, 2006): 441–56. http://dx.doi.org/10.1017/s0024282906005950.

Повний текст джерела

Анотація:

Nephroma occultum is a COSEWIC listed cyanolichen of “Special Concern”. It is endemic to old-growth cedar-hemlock forests in western North America. This is the first study to place N. occultum into a phylogenetic framework using nucleotide sequence and secondary structure data. It also addresses the phylogenetic relationship between N. occultum and N. arcticum. Analysis of fungal Internal Transcribed Spacer (ITS) ribosomal DNA (rDNA) produced four major clades. The cyanobacterial transfer RNALeu intron (tRNALeu) from N. occultum was separated from that of N. isidiosum and fell between the Eurasian and North American epiphytic taxa. Examination of length and complexity of the folded secondary structures revealed different trends in the ITS1 and ITS2 rRNA regions. Even though N. occultum is endemic to North America, it seems more closely related to South American temperate rainforest species than to the sympatric N. arcticum. Nephroma occultum is alone among the studied species of Peltigerales in having an exceptionally long ITS1 region, and a different tRNALeu intron DNA sequence of the photobiont suggesting association with a unique genotype of Nostoc. It may be argued that the fitness of N. occultum may be influenced by the complex ITS1 RNA structure, a unique photobiont genotype undergoing a genetic bottleneck, no sexual reproduction to generate variation, and the inability to associate with different photobionts to adapt to changing habitats.

Стилі APA, Harvard, Vancouver, ISO та ін.

16

Colby, Jason. "The Whale and the Region: Orca Capture and Environmentalism in the New Pacific Northwest." Journal of the Canadian Historical Association 24, no. 2 (May 15, 2014): 425–54. http://dx.doi.org/10.7202/1025084ar.

Повний текст джерела

Анотація:

Although the orca is today widely recognized as a cultural and ecological icon of the Pacific Northwest, historians have ignored the impact of killer whale capture on the development of the region’s environmental values and identity. Between 1964 and 1976, the waters in southern British Columbia and Washington State were the world’s principal source of captive killer whales. The display of orcas by the region’s aquariums transformed human perceptions of this marine predator, and soon aquariums around the world were placing orders for Pacific Northwest killer whales. Yet the expanding capture and export of orcas in the late 1960s and early 1970s raised troubling ecological and moral questions for the region’s human residents. In the context of shifting attitudes toward cetaceans and rising environmental awareness throughout North America, Pacific Northwesters on both sides of the border increasingly viewed orcas as symbols of their region’s shared ecological concerns. The transnational nature of the region’s killer whale pods helped spur not only ecological reflection but also transborder cooperation among activists, scientists, and government officials to study and eventually protect the species. In the process, the shifting human relations with orcas helped redefine the Pacific Northwest.

Стилі APA, Harvard, Vancouver, ISO та ін.

17

Wilmot, Taylor Y., Derek V. Mallia, A. Gannet Hallar, and John C. Lin. "Wildfire activity is driving summertime air quality degradation across the western US: a model-based attribution to smoke source regions." Environmental Research Letters 17, no. 11 (October 24, 2022): 114014. http://dx.doi.org/10.1088/1748-9326/ac9a5d.

Повний текст джерела

Анотація:

Abstract Over recent decades, wildfire activity across western North America has increased in concert with summertime air quality degradation in western US urban centers. Using a Lagrangian atmospheric modeling framework to simulate smoke transport for almost 20 years, we quantitatively link decadal scale air quality trends with regional wildfire activity. Modeled smoke concentrations correlate well with observed fine-mode aerosol (PM2.5) concentrations (R > 0.8) at the urban centers most impacted by smoke, supporting attribution of observed trends to wildfire sources. Many western US urban centers (23 of 33 total) exhibit statistically significant trends toward enhanced, wildfire-driven, extreme (98th quantile) air quality episodes during the months of August and September for the years 2003–2020. In the most extreme cases, trends in 98th quantile PM2.5 exceed 2 μg m−3 yr−1, with such large trends clustering in the Pacific Northwest and Northern/Central California. We find that the Pacific Northwest is uniquely impacted by smoke from wildfires in the mountainous Pacific Northwest, California, and British Columbia, leading to especially robust degradation of air quality. Summertime PM2.5 trends in California and the Intermountain West are largely explained by wildfires in mountainous California and the American Rockies, respectively. These results may inform regional scale forest management efforts, and they present significant implications for understanding the wildfire—air quality connection in the context of climate driven trends toward enhanced wildfire activity and subsequent human exposure to degraded air quality.

Стилі APA, Harvard, Vancouver, ISO та ін.

18

Glawe, Dean A. "First Report of Powdery Mildew of Mahonia aquifolium Caused by Microsphaera berberidis (Erysiphe berberidis) in North America." Plant Health Progress 4, no. 1 (January 2003): 41. http://dx.doi.org/10.1094/php-2003-0206-01-hn.

Повний текст джерела

Анотація:

Mahonia aquifolium is a widely-grown plant in the coastal Pacific Northwest. This report documents for the first time a powdery mildew on M. aquifolium in North America caused by a fungus fitting the description of Microsphaera berberidis. Accepted for publication 14 January 2003. Published 6 February 2003.

Стилі APA, Harvard, Vancouver, ISO та ін.

19

Neidermeier, Alex N., Darrell W. Ross, Nathan P. Havill, and Kimberly F. Wallin. "Temporal Asynchrony of Adult Emergence Between Leucopis argenticollis and Leucopis piniperda (Diptera: Chamaemyiidae), Predators of the Hemlock Woolly Adelgid (Hemiptera: Adelgidae), with Implications for Biological Control." Environmental Entomology 49, no. 4 (May 28, 2020): 823–28. http://dx.doi.org/10.1093/ee/nvaa049.

Повний текст джерела

Анотація:

Abstract Two species of silver fly, Leucopis argenticollis (Zetterstedt) and Leucopis piniperda (Malloch) (Diptera: Chamaemyiidae), from the Pacific Northwest region of North America have been identified as potential biological control agents of hemlock woolly adelgid (Hemiptera: Adelgidae: Adelges tsugae Annand) in eastern North America. The two predators are collectively synchronized with A. tsugae development. To determine whether adult emergence of the two species of silver fly are also synchronized with one another, we collected adult Leucopis which emerged from A. tsugae-infested western hemlock [Pinaceae: Tsuga heterophylla (Raf.) Sarg.] from four sites in the Pacific Northwest over a 29-d period. Specimens were collected twice daily in the laboratory and identified to species using DNA barcoding. The study found that more adult Leucopis were collected in the evening than the morning. Additionally, the daily emergences of adults over the 29-d sampling period exhibited sinusoidal-like fluctuations of peak abundance of each species, lending evidence to a pattern of temporal partitioning. This pattern could have logistical implications for their use as biological control agents in eastern North America, namely the need to release both species for maximum efficacy in decreasing A. tsugae populations.

Стилі APA, Harvard, Vancouver, ISO та ін.

20

MARCOGLIESE, DAVID J., and KYM C. JACOBSON. "Parasites as biological tags of marine, freshwater and anadromous fishes in North America from the tropics to the Arctic." Parasitology 142, no. 1 (March 10, 2014): 68–89. http://dx.doi.org/10.1017/s0031182014000110.

Повний текст джерела

Анотація:

SUMMARYParasites have been considered as natural biological tags of marine fish populations in North America for almost 75 years. In the Northwest Atlantic, the most studied species include Atlantic cod (Gadus morhua), Atlantic herring (Clupea harengus) and the redfishes (Sebastes spp.). In the North Pacific, research has centred primarily on salmonids (Oncorhynchus spp.). However, parasites have been applied as tags for numerous other pelagic and demersal species on both the Atlantic and Pacific coasts. Relatively few studies have been undertaken in the Arctic, and these were designed to discriminate anadromous and resident salmonids (Salvelinus spp.). Although rarely applied in fresh waters, parasites have been used to delineate certain fish stocks within the Great Lakes-St Lawrence River basin. Anisakid nematodes and the copepod Sphyrion lumpi frequently prove useful indicators in the Northwest Atlantic, while myxozoan parasites prove very effective on the coast and open seas of the Pacific Ocean. Relative differences in the ability of parasites to discriminate between fish stocks on the Pacific and Atlantic coasts may be due to oceanographic and bathymetric differences between regions. Molecular techniques used to differentiate populations and species of parasites show promise in future applications in the field.

Стилі APA, Harvard, Vancouver, ISO та ін.

21

Ammirati, Joseph F., Tess E. Barlow, Michelle T. Seidl, Oldriska Ceska, Mary Berbee, Emma Harrower, and Kare Liimatainen. "Cortinarius parkeri, a new species from the Pacific Northwest of North America." Botany 90, no. 4 (April 2012): 327–35. http://dx.doi.org/10.1139/b2012-003.

Повний текст джерела

Анотація:

Cortinarius parkeri , a new vernal species in subgenus Cortinarius , section Veneti , is described from the Pacific Northwest of North America. Within its subgenus, C. parkeri is unique in that its membranous universal veil is attached to the pileus edge of young mushrooms and extends as a covering over the pileus surface. At maturity, the universal veil forms a sheathing membranous volva-like structure that flares out above the stipe base. Sequences of the nuclear ribosomal DNA internal transcribed spacer region (ITS1-5.8s-ITS2) determined for 13 collections of C. parkeri were all identical, except for a polymorphic two base pair indel. In a phylogeny including other related species from North America and Europe, C. parkeri is monophyletic. In contrast to intraspecific distances, the interspecific genetic distance between C. parkeri and other Veneti species sequences was large. Being dikaryotic, mushrooms of C. parkeri contain genomes from two parents. As expected in a dikaryon in an interbreeding population, the polymorphic indel was homozygous in some collections but heterozygous in three collections, with conflicting sequences resulting from mixed parental types. Taken together, morphological and molecular results strongly support C. parkeri as a new and distinctive species.

Стилі APA, Harvard, Vancouver, ISO та ін.

22

Wilson, Linda M., Judith Fehrer, Siegfried Bräutigam, and Gitta Grosskopf. "A new invasive hawkweed, Hieracium glomeratum (Lactuceae, Asteraceae), in the Pacific Northwest." Canadian Journal of Botany 84, no. 1 (January 2006): 133–42. http://dx.doi.org/10.1139/b05-149.

Повний текст джерела

Анотація:

During the summer of 2001, a newly recorded species of exotic hawkweed ( Hieracium glomeratum Froel.) for North America was identified from specimens collected in southeastern British Columbia, Canada, and eastern Washington state, United States. The specimens had previously been identified as the closely related Hieracium caespitosum Dumort. DNA fingerprints of plants from different localities proved to be identical. Their clonality, along with a spot-like distribution, indicates that this apomictic species probably originated from a single introduction from Europe, which subsequently spread. This species adds to the complex of 14 other exotic Hieracium species belonging to the Eurasian subgenus Pilosella that are adventive in the United States and Canada. A distribution map of the native and adventive range of H. glomeratum, and a key to distinguish it from related species in subgenus Pilosella that occur in North America are provided. The evolutionary and invasive potential of H. glomeratum is also discussed.

Стилі APA, Harvard, Vancouver, ISO та ін.

23

Peck, J. E. "Towards sustainable commercial moss harvest in the Pacific Northwest of North America." Biological Conservation 128, no. 3 (March 2006): 289–97. http://dx.doi.org/10.1016/j.biocon.2005.10.001.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

24

SILVESTER, W. "Molybdenum limitation of asymbiotic nitrogen fixation in forests of Pacific Northwest America." Soil Biology and Biochemistry 21, no. 2 (1989): 283–89. http://dx.doi.org/10.1016/0038-0717(89)90106-5.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

25

Petrov, A. Y., V. N. Kostornichenko, and M. M. Koskina. "International Dimension in Colonization of the North-West of America and California at the End of the 17-18 ^th Centuries." MGIMO Review of International Relations 13, no. 5 (November 11, 2020): 7–30. http://dx.doi.org/10.24833/2071-8160-2020-5-74-7-30.

Повний текст джерела

Анотація:

The article reviews the initial period of European colonization of the North Pacific Ocean and California within the context of diplomatic relations between Russia and Spain during the late 17th and early 18th centuries. It tries to understand the policies of European powers in the American Northwest and the reasons for pursuing their colonial interests there. It analyses the history of exploration of these territories, expeditions to the northern part of the Pacific Ocean, and historical maps of this region. For the first time in Russian historiography the authors touch upon the exploration of California in the 18th century.The exploration of the North Pacific Ocean, the northwestern American coast, including certain areas of California, Alaska and the Aleutian Islands has long attracted the attention of European powers. It was a process in which government authorities and private merchant companies took part. The expansion of the Spanish Empire into California was made possible in part because of the concerns of the Madrid court about the strengthening of the Russian and British empires in the North Pacific Ocean. The Spanish documents from the archives of Madrid, Seville and Simancas – the article introduces them into research communication the first time - show the validity of the fears of the Madrid court regarding the inevitable development of Russian colonization in the region. The advance of Russia to the shores of America has economic reasons: Cossacks and merchants reached the Pacific Ocean pursuing the desire to profit from the fur trade. As the economic influence expanded, the state interests of annexing territories and bringing the local population into citizenship followed behind. The territorial advance of the Russians to the Pacific Ocean was facilitated by the ambitious, but at the same time balanced diplomacy of Peter I, which managed to ensure the expansion of the borders of the Russian Empire.Spanish consolidation in certain territories in California was aimed at a possible containment of the Russian advance. Russian-Spanish relations in the Northwest Pacific at the end of the 17th – 18th centuries contributed to the nature of the subsequent development of territories in the North Pacific Ocean.

Стилі APA, Harvard, Vancouver, ISO та ін.

26

Reynolds, Carolyn A., Melinda S. Peng, and Jan-Huey Chen. "Recurving Tropical Cyclones: Singular Vector Sensitivity and Downstream Impacts." Monthly Weather Review 137, no. 4 (April 1, 2009): 1320–37. http://dx.doi.org/10.1175/2008mwr2652.1.

Повний текст джерела

Анотація:

Abstract Singular vectors (SVs) are used to study the sensitivity of 2-day forecasts of recurving tropical cyclones (TCs) in the western North Pacific to changes in the initial state. The SVs are calculated using the tangent and adjoint models of the Navy Operational Global Atmospheric Prediction System (NOGAPS) for 72 forecasts for 18 TCs in the western North Pacific during 2006. In addition to the linear SV calculation, nonlinear perturbation experiments are also performed in order to examine 1) the similarity between nonlinear and linear perturbation growth and 2) the downstream impacts over the North Pacific and North America that result from changes to the 2-day TC forecast. Both nonrecurving and recurving 2-day storm forecasts are sensitive to changes in the initial state in the near-storm environment (in an annulus approximately 500 km from the storm center). During recurvature, sensitivity develops to the northwest of the storm, usually associated with a trough moving in from the west. These upstream sensitivities can occur as far as 4000 km to the northwest of the storm, over the Asian mainland, which has implications for adaptive observations. Nonlinear perturbation experiments indicate that the linear calculations reflect case-to-case variability in actual nonlinear perturbation growth fairly well, especially when the growth is large. The nonlinear perturbations show that for recurving tropical cyclones, small initial perturbations optimized to change the 2-day TC forecast can grow and propagate downstream quickly, reaching North America in 5 days. The fastest 5-day perturbation growth is associated with recurving storm forecasts that occur when the baroclinic instability over the North Pacific is relatively large. These results suggest that nonlinear forecasts perturbed using TC SVs may have utility for predicting the downstream impact of TC forecast errors over the North Pacific and North America.

Стилі APA, Harvard, Vancouver, ISO та ін.

27

REISWIG, HENRY M. "Four new species of Hexactinellida (Porifera) and a name replacement from the NE Pacific." Zootaxa 4466, no. 1 (August 31, 2018): 124. http://dx.doi.org/10.11646/zootaxa.4466.1.11.

Повний текст джерела

Анотація:

Four new species of Hexactinellida are described from the northwest coast of North America. Two northern ones from bottom longline sablefish traps set on Bowie Seamount off northwest Canada are Pinulasma bowiensis and Rhabdocalyptus trichotis. Two southern forms picked by ROV from the wreck of USS Independence off San Francisco, California are Staurocalyptus pamelaturnerae and Hyalascus farallonensis. A fifth specimen from the southern site is considered conspecific with the junior homonym Farrea aculeata Schulze, and allowed renaming of that species as Farrea schulzei. These additions bring the number of Hexactinellida known from the area (30º–90º N) to 62 species.

Стилі APA, Harvard, Vancouver, ISO та ін.

28

Overland, James E. "Causes of the Record-Breaking Pacific Northwest Heatwave, Late June 2021." Atmosphere 12, no. 11 (October 30, 2021): 1434. http://dx.doi.org/10.3390/atmos12111434.

Повний текст джерела

Анотація:

The extreme heat event that hit the Pacific Northwest (Oregon, Washington, southern British Columbia) at the end of June 2021 was 3 °C greater than the previous Seattle record of 39 °C; larger extremes of 49 °C were observed further inland that were 6 °C above previous record. There were hundreds of deaths over the region and loss of marine life and forests. At the large scale prior to the event, the polar vortex was split over the Arctic. A polar vortex instability center formed over the Bering Sea and then extended southward along the west coast of North America. The associated tropospheric trough (low geopotential heights) established a multi-day synoptic scale Omega Block (west-east oriented low/high/low geopotential heights) centered over the Pacific Northwest. Warming was sustained in the region due to subsidence/adiabatic heating and solar radiation, which were the main reasons for such large temperature extremes. The seasonal transition at the end of spring suggests the possibility of a southern excursion of a polar vortex/jet stream pair. Both the Pacific Northwest event in 2021 and the Siberian heatwave climax in June 2020 may be examples of crossing a critical state in large-scale atmospheric circulation variability.

Стилі APA, Harvard, Vancouver, ISO та ін.

29

Tomalin, Marcus. "Reassessing Nineteenth-Century Missionary Linguistics on the Pacific Northwest Coast." Historiographia Linguistica 35, no. 1-2 (March 7, 2008): 83–120. http://dx.doi.org/10.1075/hl.35.1-2.06tom.

Повний текст джерела

Анотація:

Summary This article reconsiders various aspects of missionary linguistics on the Pacific Northwest Coast in the late 19th century. In particular, it explores the complex relationship between Alfred Hall’s (1853–1918) A Grammar of the Kwagiutl Language (1888) and Charles Harrison’s (d.1926) Haida Grammar (1895), and it is shown that, in many cases, both the basic analytical framework and the clarificatory examples that Harrison used were largely derived from Hall’s work. Such connections have not been recognised previously, and yet they are of importance, since they indicate that traditional Graeco-Roman categories and paradigms were not the only templates used by missionaries who were seeking to analyse the indigenous languages of North America. In addition, Hall’s and Harrison’s accounts of numerals in Kwak’wala and Haida (respectively) are reassessed, and it is suggested that their analyses were influenced by the classificatory approaches presented in contemporaneous studies of non-Western languages (e.g., Japanese).

Стилі APA, Harvard, Vancouver, ISO та ін.

30

Dixit, Ashwin, Scott F. Carroll, and Salman T. Qureshi. "Cryptococcus gattii: An Emerging Cause of Fungal Disease in North America." Interdisciplinary Perspectives on Infectious Diseases 2009 (2009): 1–13. http://dx.doi.org/10.1155/2009/840452.

Повний текст джерела

Анотація:

During the latter half of the twentieth century, fungal pathogens such asCryptococcus neoformanswere increasingly recognized as a significant threat to the health of immune compromised populations throughout the world. Until recently, the closely related speciesC. gattiiwas considered to be a low-level endemic pathogen that was confined to tropical regions such as Australia. Since 1999,C. gattiihas emerged in the Pacific Northwest region of North America and has been responsible for a large disease epidemic among generally healthy individuals. The changing epidemiology ofC. gattiiinfection is likely to be a consequence of alterations in fungal ecology and biology and illustrates its potential to cause serious human disease. This review summarizes selected biological and clinical aspects ofC. gattiithat are particularly relevant to the recent North American outbreak and compares these to the Australian and South American experience.

Стилі APA, Harvard, Vancouver, ISO та ін.

31

Peetz, Amy B., та Inga A. Zasada. "Species-specific diagnostics using a β-1,4-endoglucanase gene for Pratylenchus spp. occurring in the Pacific Northwest of North America". Nematology 18, № 10 (2016): 1219–29. http://dx.doi.org/10.1163/15685411-00003026.

Повний текст джерела

Анотація:

A PCR assay was designed and optimised to differentiate fourPratylenchusspecies commonly encountered in soil and root samples from the Pacific Northwest of North America. Species-specific primers were designed to accessions fromPratylenchusspecies deposited in GenBank which encoded aβ-1,4-endoglucanase gene. The optimisedβ-1,4-endoglucanase gene primer sets produced amplicons that were 380, 293, 528 and 364 bp fromP. crenatus,P. neglectus,P. penetransandP. thornei, respectively. Primer sets were tested successfully for functionality and specificity within each of the four species as well as against other species not commonly found in the Pacific Northwest. This method allowed for the identification of juveniles to species, thereby precluding the necessity of the presence of females in a sample for accurate diagnostics. Ultimately, this diagnostic PCR assay could be used as an efficient tool for rapid diagnostics of thesePratylenchusspecies recovered from soil and root samples in any laboratory equipped for PCR.

Стилі APA, Harvard, Vancouver, ISO та ін.

32

Klein, Tamir, Jose M. Torres-Ruiz, and John J. Albers. "Conifer desiccation in the 2021 NW heatwave confirms the role of hydraulic damage." Tree Physiology 42, no. 4 (January 27, 2022): 722–26. http://dx.doi.org/10.1093/treephys/tpac007.

Повний текст джерела

Анотація:

Abstract The unprecedented heatwave which hit the Pacific northwest of North America in late June–early July 2021 impacted ecosystems and communities, yet evidence for and analysis of this impact are still missing. Here we bring a unique dataset quantifying the impact on conifer trees, which are keystone species of many northwest ecosystems. Moreover, we take advantage of this exceptional event as a broad, extreme, ‘field experiment’ to test a fundamental theory in plant physiology and prepare our forests for a harsher future. Overall, the data collected confirm the role of hydraulic vulnerability in drought-induced injury to trees.

Стилі APA, Harvard, Vancouver, ISO та ін.

33

Jørgensen, Per M., and Harrie J. M. Sipman. "The lichen Fuscopannaria leucosticta (Tuck.) P. M. Jørg. found in the tropics." Lichenologist 39, no. 3 (May 2007): 305–7. http://dx.doi.org/10.1017/s0024282907006767.

Повний текст джерела

Анотація:

In a recent treatment of the Pannariceae of Ecuador, Jørgensen & Arvidsson (2004: 131) pointed out the surprising absence of the genus Fuscopannaria in Ecuador, a genus which is rather common, with many species, in the Pacific Northwest of North America (Jørgensen 2001). The authors claim that, on the western side of the Americas, the genus appears to stop north of Mexico, only to reappear in southern Chile and Argentina. While going through his material, the second author discovered two specimens belonging in this genus from Mexico and Ecuador, which contradicts that statement. Both are typical Fuscopannaria leucosticta specimens (Fig. 1), the type species of the genus originally described from eastern North America (Jørgensen 2001: 684), and fairly widely distributed in warm temperate parts there, and extending as far south as Cuba (Fig. 2).

Стилі APA, Harvard, Vancouver, ISO та ін.

34

Schweitzer, Carrie E. "ADDITIONS TO THE TERTIARY DECAPOD FAUNA OF THE PACIFIC NORTHWEST OF NORTH AMERICA." Journal of Crustacean Biology 21, no. 2 (May 2001): 521–37. http://dx.doi.org/10.1651/0278-0372(2001)021[0521:atttdf]2.0.co;2.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

35

Jacoby, J. M., and J. Kann. "The occurrence and response to toxic cyanobacteria in the Pacific Northwest, North America." Lake and Reservoir Management 23, no. 2 (June 2007): 123–43. http://dx.doi.org/10.1080/07438140709353916.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

36

Schweitzer, Carrie E. "Additions to the Tertiary Decapod Fauna of the Pacific Northwest of North America." Journal of Crustacean Biology 21, no. 2 (January 1, 2001): 521–37. http://dx.doi.org/10.1163/20021975-99990153.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

37

Goward, Trevor. "Hypogymnia oceanica, a New Lichen (Ascomycotina) from the Pacific Northwest of North America." Bryologist 91, no. 3 (1988): 229. http://dx.doi.org/10.2307/3243225.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

38

Davison, Paul G., and David K. Smith. "Calycularia crispula (Hepaticae) in the Aleutian Islands and Pacific Northwest of North America." Bryologist 95, no. 3 (1992): 266. http://dx.doi.org/10.2307/3243482.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

39

Peterson, Eric B., and Trevor Goward. "Chaenothecopsis aeruginosasp. nov., an Overlooked Calicioid in the Pacific Northwest of North America." Herzogia 29, no. 2 (December 2016): 561–65. http://dx.doi.org/10.13158/heia.29.2.2016.561.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

40

Cortini, F., P. G. Comeau, T. Wang, D. E. Hibbs, and A. Bluhm. "Climate effects on red alder growth in the Pacific Northwest of North America." Forest Ecology and Management 277 (August 2012): 98–106. http://dx.doi.org/10.1016/j.foreco.2012.04.024.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

41

Soltis, Douglas E., Matthew A. Gitzendanner, Darren D. Strenge, and Pamela S. Soltis. "Chloroplast DNA intraspecific phylogeography of plants from the Pacific Northwest of North America." Plant Systematics and Evolution 206, no. 1-4 (1997): 353–73. http://dx.doi.org/10.1007/bf00987957.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

42

Meyer, Harry A., and Juliana G. Hinton. "New water bear records (Phylum Tardigrada) from the Pacific Northwest of North America." Pan-Pacific Entomologist 88, no. 3 (July 2012): 304–10. http://dx.doi.org/10.3956/2012-06.1.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

43

Sampangi, R., D. A. Glawe, and S. K. Mohan. "First North American Record of Powdery Mildew of Cleome hassleriana Caused by Leveillula taurica." Plant Health Progress 8, no. 1 (January 2007): 54. http://dx.doi.org/10.1094/php-2007-0219-02-br.

Повний текст джерела

Анотація:

This report documents the first record of Leveillula taurica on a species of Cleome (spiderflower) in North America. The introduced plant pathogen Leveillula taurica (Lév.) G. Arnaud (anamorph = Oidiopsis sicula Scalia) occurs on a range of hosts in the Pacific Northwest (PNW), including onion and was identified infecting Cleome hassleriana Chod. (common name: pink queen, family: Capparaceae). Accepted for publication 29 December 2007. Published 19 February 2007.

Стилі APA, Harvard, Vancouver, ISO та ін.

44

Finn, Chad, Kirsten Wennstrom, Janessa Link, and Jill Ridout. "Evaluation of Rubus leucodermis Populations from the Pacific Northwest." HortScience 38, no. 6 (October 2003): 1169–72. http://dx.doi.org/10.21273/hortsci.38.6.1169.

Повний текст джерела

Анотація:

Sixteen western black raspberry (Rubus leucodermis Douglas ex Torrey & A. Gray) populations, collected from through out the Pacific Northwest, and `Munger', the most widely grown black raspberry (R. occidentalis L.) cultivar, were established in 1994 in a replicated trial in Corvallis, Ore. In 1996 and 1997 the seedlings were evaluated for date of budbreak, flowering date, ripening date, fruit size, and disease tolerance. Fruit within a replication were pooled for evaluation of pH, soluble solids, titratable acidity, and anthocyanin content. The plants were vigorous and had produced solid hedges by the time evaluation commenced. The populations were significantly different within each year for all traits except for anthocyanin content in 1996. Rubusleucodermis populations were identified that broke bud and ripened fruit earlier or later than `Munger'; however, all flowered with or sooner than `Munger'. Despite the fact that R. occidentalis is native to eastern North America and R. leucodermis to the West, `Munger' was much less affected by foliar and cane diseases than the R. leucodermis populations. Several populations were as vigorous as `Munger'. `Munger' had fruit that were 30% larger than the mean for any R. leucodermis population. Generally, R. leucodermis had higher pH and lower titratable acidity than `Munger', but many populations had similar soluble solids; lower acidity may partly explain the blandness of R. leucodermis fruit compared with `Munger'. Despite the lighter appearance of R. leucodermis, the anthocyanin levels of some populations were higher than `Munger'. Rubusleucodermis may be a source of earlier fruiting, later budbreak, and vigor when used in breeding but careful selection for fruit size (for the fresh market), acidity (for the processing market), and disease resistance must be done. Rubus leucodermis may also be an excellent source of raspberry bushy dwarf virus (RBDV) resistance in black and red raspberry breeding programs.

Стилі APA, Harvard, Vancouver, ISO та ін.

45

Northam, F. E., and R. H. Callihan. "The Windgrasses(AperaAdans., Poaceae) in North America." Weed Technology 6, no. 2 (June 1992): 445–50. http://dx.doi.org/10.1017/s0890037x0003503x.

Повний текст джерела

Анотація:

Two introduced windgrass species have become crop weeds in North America. Common windgrass is a major weed of winter cereals in Europe and was first documented in North America in the early 1800s. It is a weed of roadsides and waste areas in the northeastern United States and in winter grain fields of southern Ontario and Michigan. Interrupted windgrass was first reported in North America approximately 90 yr ago; it is adapted to more arid sites than common windgrass and is distributed predominantly in the northwestern U.S.A. During the past 10 to 15 yr, interrupted windgrass has adversely affected winter grain and grass seed producers in the Pacific Northwest due to additional control costs.

Стилі APA, Harvard, Vancouver, ISO та ін.

46

ALLEN, DEBORAH. "Acquiring “Knowledge of Our Own Continent”: Geopolitics, Science, and Jeffersonian Geography, 1783–1803." Journal of American Studies 40, no. 2 (July 27, 2006): 205–32. http://dx.doi.org/10.1017/s0021875806001356.

Повний текст джерела

Анотація:

In his role as a promoter of scientific exploration of North America, Thomas Jefferson shared with Jedidiah Morse, considered by many to be the father of American geography, the patriotic desire to counteract misinformation furnished by “imperfect and erroneous sketches” describing the continent's geography by European writers. Yet his interest in the science of geography was also motivated by a concern with America's self-image in the realm of international politics, learning, and commerce. In the summer of 1802 Jefferson was prompted to send an exploring party to North America's westernmost territories in response to reading Voyages from Montreal, Alexander Mackenzie's account of his voyages across the continent to its northwest coast. At the end of his narrative, the Scottish explorer had encouraged Britain's control of a region that, if certain natural obstacles were overcome, might supply fur and fish to “the markets of the four quarters of the globe,” and proposed a line of fortified posts to be established to maintain the British Empire's presence from Lake Winnipeg to the Pacific. Jefferson understood that such action would obstruct America's westward expansion, block Russian advances from Alaska, and thus make possible a British dominion linking two great oceans. Edward Thornton, the British minister to the United States, would later observe that Mackenzie's discoveries had provoked the American President, who in 1803 was also the president of the American Philosophical Society, to concretize his dream “to set on foot an expedition entirely of a scientific nature for exploring the Western continent of America,” and that he was, furthermore, “ambitious in his character of a man of letters and science, of distinguishing his Presidency by a discovery” of a route to the Pacific Ocean by way of the Missouri, “now the only one left to his enterprise, the Northern Communication having been so ably explored and ascertained by Sir Alexander Mackenzie's journeys.

Стилі APA, Harvard, Vancouver, ISO та ін.

47

Lutsko, Nicholas J., Jane Wilson Baldwin, and Timothy W. Cronin. "The Impact of Large-Scale Orography on Northern Hemisphere Winter Synoptic Temperature Variability." Journal of Climate 32, no. 18 (August 13, 2019): 5799–814. http://dx.doi.org/10.1175/jcli-d-19-0129.1.

Повний текст джерела

Анотація:

Abstract The impact of large-scale orography on wintertime near-surface (850 hPa) temperature variability on daily and synoptic time scales (from days to weeks) in the Northern Hemisphere is investigated. Using a combination of theory, idealized modeling work, and simulations with a comprehensive climate model, it is shown that large-scale orography reduces upstream temperature gradients, in turn reducing upstream temperature variability, and enhances downstream temperature gradients, enhancing downstream temperature variability. Hence, the presence of the Rockies on the western edge of the North American continent increases temperature gradients over North America and, consequently, increases North American temperature variability. By contrast, the presence of the Tibetan Plateau and the Himalayas on the eastern edge of the Eurasian continent damps temperature variability over most of Eurasia. However, Tibet and the Himalayas also interfere with the downstream development of storms in the North Pacific storm track, and thus damp temperature variability over North America, by approximately as much as the Rockies enhance it. Large-scale orography is also shown to impact the skewness of downstream temperature distributions, as temperatures to the north of the enhanced temperature gradients are more positively skewed while temperatures to the south are more negatively skewed. This effect is most clearly seen in the northwest Pacific, off the east coast of Japan.

Стилі APA, Harvard, Vancouver, ISO та ін.

48

Hayakawa, Tatsuya, and Hiromichi Hirano. "A revised inoceramid biozonation for the Upper Cretaceous based on high-resolution carbon isotope stratigraphy in northwestern Hokkaido, Japan." Acta Geologica Polonica 63, no. 2 (June 1, 2013): 239–63. http://dx.doi.org/10.2478/agp-2013-0010.

Повний текст джерела

Анотація:

Abstract Hayakawa, T., Hirano, H. 2013. A revised inoceramid biozonation for the Upper Cretaceous based on high-resolution carbon isotope stratigraphy in northwestern Hokkaido, Japan. Acta Geologica Polonica, 63 (2), 239-263. Warszawa. Biostratigraphic correlations of inoceramid bivalves between the North Pacific and Euramerican provinces have been difficult because the inoceramid biostratigraphy of the Japanese strata has been based on endemic species of the northwest Pacific. In this study, carbon stable isotope fluctuations of terrestrial organic matter are assembled for the Upper Cretaceous Yezo Group in the Haboro and Obira areas, Hokkaido, Japan, in order to revise the chronology of the inoceramid biozonation in Japan. The carbon isotope curves are correlated with those of marine carbonates in English and German sections with the aid of age-diagnostic taxa. According to the correlations of the carbon isotope curves, 11 isotope events are recognised in the sections studied. As a result of these correlations, the chronology of the inoceramid biozones of the Northwest Pacific has been considerably revised. The revised inoceramid biozones suggest that the timing of the origination and extinction of the inoceramids in the North Pacific biotic province is different from the stage/substage boundaries defined by inoceramids, as used in Europe and North America.

Стилі APA, Harvard, Vancouver, ISO та ін.

49

Smith, Paul L., Howard W. Tipper, and David M. Ham. "Lower Jurassic Amaltheidae (Ammonitina) in North America: paleobiogeography and tectonic implications." Canadian Journal of Earth Sciences 38, no. 10 (October 1, 2001): 1439–49. http://dx.doi.org/10.1139/e01-034.

Повний текст джерела

Анотація:

The amaltheids are restricted temporally to the late Pliensbachian and geographically to the northern part of the northern hemisphere. Amaltheus stokesi is the only species that occurs in all areas of North America where amaltheids are found. The craton north of the CanadaU.S.A. border yields the most diverse amaltheid fauna, including six of the seven taxa known in North America. On Quesnellia and Stikinia, there are no endemic amaltheids, and diversity is low; A. stokesi increases in abundance northwards where, in Stikinia, A. margaritatus makes rare appearances. Wrangellia, with its rich Pliensbachian Tethyan and east Pacific faunas, is almost devoid of amaltheids, but its amaltheid fauna does include two specimens of A. viligaensis, an eastern Russian species that is unknown elsewhere in North America. Cratonal amaltheid faunas have more in common with those of northwest Europe than eastern Eurasia, suggesting that the Arctic and northern North Atlantic constituted the main dispersal route. Paleobiogeographic patterns on the major allochthonous terranes argue against terrane rotation and in support of post-Pliensbachian northward displacement relative to the North American craton. In addition, the presence of western Pacific faunal elements on Wrangellia suggests a more significant longitudinal displacement relative to the craton for this terrane compared to that for Quesnellia and Stikinia. The Chilliwack terrane of southwestern British Columbia is a Pliensbachian paleobiogeographic anomaly.

Стилі APA, Harvard, Vancouver, ISO та ін.

50

Stølen, Marianne. "Om Grundtvigs sanges liv i Nordamerika." Grundtvig-Studier 59, no. 1 (January 1, 2008): 170–93. http://dx.doi.org/10.7146/grs.v59i1.16532.

Повний текст джерела

Анотація:

Om Grundtvigs sanges liv i Nordamerika[On the life of Grundtvig’s songs in North America]By Marianne StølenThe article discusses three important conditions for that rich life which Grundtvig’s songs have enjoyed among Danish-Americans in North America. Treated first is the songbook of Frederik Lange Grundtvig, Sangbog for det danske Folk i Amerika [Songbook for the Danish folk in America] (1888), commonly known as “the red one,” with focus upon F. L. Grundtvig’s selection of familiar and unfamiliar songs and hymns gathered from his father’s treasury of song and his reworking of some of these with regard to their relevance for use among the Danish immigrants. Next is described the production of songs among the migrants, especially the Danish pastors, with examples of the word-choice which reveals an assimilation of key conceptwords from Grundtvig’s writings along with readily recognisable echoes of lines from the Grundtvig classics. There follows a description of the Hymnal for Church and Home (1927) and the Danish-American A World of Song (1941), each of which in its way collaborated in building a bridge between successive generations of users. Particular attention is drawn to the translations contributed to the songbook by the Danish-American translator and pastor S. D. Rodholm, with use of examples from Grundtvig’s authorship.Finally a glimpse is offered into the role played today by Grundtvig’s songs in the song-repertoire of Danish-American conventions and among the present members of two singing groups in the Pacific Northwest.

Стилі APA, Harvard, Vancouver, ISO та ін.

Статті в журналах з теми "Pacific Northwest America"

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями