Changes In Spring Arrival Dates of Rufous Hummingbirds (Selasphorus rufus) In Western North America In the Past Century

2017 ◽  
Vol 129 (3) ◽  
pp. 535-544 ◽  
Author(s):  
Jason R. Courter
Keyword(s):  
North America ◽  
Past Century ◽  
Western North America ◽  
Selasphorus Rufus ◽  
The Past ◽  
Arrival Dates ◽  
Spring Arrival

Introduction

2011 ◽  
pp. 7-10
Author(s):  
Anne Billson
Keyword(s):  
North America ◽  
South Korea ◽  
Past Century ◽  
Film Festival ◽  
The Past ◽  
The Right ◽  
World Premiere

This chapter introduces the Swedish vampire film, Låt den rätte komma (Let the Right One In), which not only stands out from contemporary vampire films, but ranks among the very best vampire movies of the past century. The chapter mentions director Tomas Alfredson and screenwriter John Ajvide Lindqvist, who adapted Låt den rätte komma from his own novel of the same name. It also mentions a song by the lugubrious British rock singer-songwriter Morrissey as Lindqvist's inspiration for the title of his novel 'Let the Right One Slip In'. It recounts Let the Right One In's world premiere on 26 January 2008 at the Göteborg International Film Festival in Sweden and screening at other festivals in Europe, North America, Australia and South Korea. The chapter explains why Let the Right One In stands head and shoulders above other recent horror movies like Twilight from 2008.

Nutlet Morphology and the Use of SEMs to Determine Characteristics for Identification of Species in the Genus Cryptantha Lehm. ex G. Don Section Oreocarya (E. Greene) Payson

2000 ◽  
Vol 8 (6) ◽  
pp. 34-35
Author(s):  
Willow B. Murphy ◽  
Walter A. Kelley ◽  
Richard C. Dujay
Keyword(s):  
North America ◽  
Flower Morphology ◽  
Western North America ◽  
Morphological Variations ◽  
The Past ◽  
Specific Differentiation ◽  
The Family ◽  
Identification Of Species ◽  
Vegetative Characters

The genus Cryptantha Lehm ex G. Don section Oreocarya (E. Greene) Payson of the family Boraginaceae presents some problems to botanists, both professional and amateur, in the keying and identification of species. The genus contains approximately 150 species, the section about 60 perennial and biennial herbs located generally in western North America. Identification has presented some taxonomic difficulty due to the variability and lack of distinctive vegetative characters. Botanists have turned to the nutlet (fruit) and flower morphology to aid in identification for precise specific differentiation. In the past, 10X magnification and a decent botanical illustrator were required to provide the illustrations necessary to assist in this identification. We are in the process of collecting micrographs of nutlets (dorsal, sagital, and ventral views) and developing a webpage containing these micrographs along with descriptions of their morphological variations.

scholarly journals Redescription of Arundel formation Ornithomimosaur material and a reinterpretation of Nedcolbertia justinhofmanni as an “Ostrich Dinosaur”: Biogeographic implications

2016 ◽  
Author(s):  
Chase Doran Brownstein
Keyword(s):  
United States ◽  
North America ◽  
Early Cretaceous ◽  
Fossil Record ◽  
East Coast ◽  
The United States ◽  
Eastern North America ◽  
New Taxon ◽  
Western North America ◽  
The Past

The fossil record of dinosaurs from the Early Cretaceous of eastern North America is scant, and only a few sediments to the east of the continent are fossiliferous. Among them is the Arundel Formation of the east coast of the United States, which has produced among the best dinosaur faunas known from the Early Cretaceous of eastern North America. The diverse dinosaur fauna of this formation has been thoroughly discussed previously, but few of the dinosaur species originally described from the Arundel are still regarded as valid genera. Much of the Arundel material is in need of review and redescription. Among the fossils of dinosaurs from this formation are those referred to ornithomimosaurs. Here, I redescribe ornithomimosaur remains from the Arundel Formation which may warrant the naming of a new taxon of dinosaur. These remains provide key information on the theropods of the Early Cretaceous of Eastern North America. The description of the Arundel material herein along with recent discoveries of basal ornithomimosaurs in the past 15 years has allowed for comparisons with the coelurosaur Nedcolbertia justinhofmanni, suggesting the latter animal was a basal ornithomimosaurian dinosaur rather than a “generalized” coelurosaur. Comparisons between the Arundel ornithomimosaur and similar southeast Asian ornithomimosaurian material as well as ornithomimosaur remains from western North America suggest that a lineage of ornithomimosaurs with a metatarsal condition intermediate between that of basal and derived ornithomimosaurs was present through southeast Asia into North America, in turn suggesting that such animals coexisted with genera having a more primitive metatarsal morphology as seen in N. justinhofmanni.

On the mortality and management of a ubiquitous musteloid: the common raccoon

2018 ◽  
Author(s):  
Samuel I. Zeveloff
Keyword(s):  
North America ◽  
Current Distribution ◽  
The State ◽  
Past Century ◽  
The Past ◽  
The Common

This chapter initially provides an overview of the current distribution and status of the common raccoon in North America. Its overall numbers and distribution, and even its utilization of certain habitats have changed dramatically; all largely within the past century. This contribution then examines how the numbers of raccoons that are killed or ‘harvested’ have changed during the last century. The term ‘harvest’ is commonly used by wildlife managers in North America to refer to the number of animals taken by hunters and trappers, for sport, or to utilize and sell their fur. The policies that determine raccoon exploitation by such practices are herein reviewed. There is an assessment of whether and how population variables are considered in establishing these hunting and trapping policies. Ultimately, this analysis reveals the state of raccoon management and offers thoughts about its potential paths.

American Religious History—Decentered with Many Centers

2002 ◽  
Vol 71 (2) ◽  
pp. 374-379 ◽  
Author(s):  
Stephen J. Stein
Keyword(s):  
North America ◽  
Correct Answer ◽  
Religious Pluralism ◽  
Religious History ◽  
American Religious History ◽  
Religious Movements ◽  
New Religious Movements ◽  
Past Century ◽  
The Past ◽  
The Rich

This panel poses the question, “Is there a center to American religious history?” We historians live in a world and work in a period when the politically correct answer to the question is, “Of course not!” In this day of decentered religious historiography the celebration of radical diversity seems to prohibit any other response. In our publications and teaching we set out to expose readers and students to the rich religious pluralism in America. We catalogue the traditions that reach back to colonial times, the communities that filled out the wider spectrum of religious options during the nineteenth century and the first half of the twentieth century, and the new religious movements that have appeared since the midpoint of the past century. One publication that provides a contemporary index to this inclusive catalogical approach is J. Gordon Mellon's Encyclopedia of American Religions, which in its fifth edition filled 1,150 pages with data regarding more than 2,100 discrete religious organizations in America, from the Aaronic Order to the Zoroastrian Associations in North America.

scholarly journals Anthropogenic impacts on mosquito populations in North America over the past century

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Ilia Rochlin ◽  
Ary Faraji ◽  
Dominick V. Ninivaggi ◽  
Christopher M. Barker ◽  
A. Marm Kilpatrick
Keyword(s):  
North America ◽  
Anthropogenic Impacts ◽  
Past Century ◽  
The Past

Historical Structure From Motion (HSfM): Automated production of high-resolution DEMs from historical aerial photography for long-term geodetic change analysis

2021 ◽  
Author(s):  
Friedrich Knuth ◽  
David Shean ◽  
Shashank Bhushan
Keyword(s):  
High Resolution ◽  
North America ◽  
Aerial Photography ◽  
Control Point ◽  
Past Century ◽  
Glacier Mass Balance ◽  
Western North America ◽  
Change Analysis ◽  
Glacier Surface ◽  
Sediment Redistribution

<p>Mountain glaciers have lost significant mass over the past century in response to a globally warming climate. However, on interannual to decadal time scales, many glaciers in Western North America show periods of both advance and retreat. To better understand these systems and their sensitivity to climate forcing, we are generating regional records of glacier surface elevation change from scanned historical film photographs acquired between the 1950s to 1990s. Our results will help constrain projections of future glacier change under different climate scenarios, as well as impacts on downstream water resources and geohazard risk.</p><p>Historical image pre-processing and manual ground control point (GCP) selection are time-intensive bottlenecks during traditional SfM processing workflows. We developed an automated photogrammetry processing pipeline (HSfM) to systematically process large archives of vertical aerial film photographs and generate sub-meter resolution digital elevation models (DEMs), without manual GCP selection. We present several case studies for glaciers in the Western North America using photos from the USGS North American Glacier Aerial Photography (NAGAP) and Earth Explorer Aerial Photography Single Frame archives, which differ in terms of available image overlap, survey area extent, and terrain characteristics. Absolute vertical accuracy of <0.5-1.0 m is achieved through iterative closest point (ICP) co-registration over stable bare-ground surfaces between the historical DEMs and modern high-resolution satellite or lidar reference DEMs. We demonstrate the potential for these new DEM records to quantify geodetic glacier mass balance and geomorphological change including moraine deposition, moraine degradation, and sediment redistribution in proglacial areas.</p>

scholarly journals Intra-guild competition and its implications for one of the biggest terrestrial predators, Tyrannosaurus rex

2011 ◽  
Vol 278 (1718) ◽  
pp. 2682-2690 ◽  
Author(s):  
Chris Carbone ◽  
Samuel T. Turvey ◽  
Jon Bielby
Keyword(s):  
North America ◽  
Late Cretaceous ◽  
Food Source ◽  
Feeding Strategy ◽  
Past Century ◽  
Size Distributions ◽  
Ecological Context ◽  
The Past ◽  
The Subject ◽  
Active Predator

Identifying tradeoffs between hunting and scavenging in an ecological context is important for understanding predatory guilds. In the past century, the feeding strategy of one of the largest and best-known terrestrial carnivores, Tyrannosaurus rex , has been the subject of much debate: was it an active predator or an obligate scavenger? Here we look at the feasibility of an adult T. rex being an obligate scavenger in the environmental conditions of Late Cretaceous North America, given the size distributions of sympatric herbivorous dinosaurs and likely competition with more abundant small-bodied theropods. We predict that nearly 50 per cent of herbivores would have been within a 55–85 kg range, and calculate based on expected encounter rates that carcasses from these individuals would have been quickly consumed by smaller theropods. Larger carcasses would have been very rare and heavily competed for, making them an unreliable food source. The potential carcass search rates of smaller theropods are predicted to be 14–60 times that of an adult T. rex . Our results suggest that T. rex and other extremely large carnivorous dinosaurs would have been unable to compete as obligate scavengers and would have primarily hunted large vertebrate prey, similar to many large mammalian carnivores in modern-day ecosystems.

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