UScholar Works
 
Filters: Collection: "ir_uspace"
1 - 25 of 13
Number of results to display per page
CreatorTitleDescriptionSubjectDate
1 Behle, William H.Birds of pine valley mountain region, Southwestern UtahIt has long been a practice among ornithologists to study the distribution, variation, and ecological relationships of birds in areas characterized by diverse physiographic features. Such studies are motivated usually by the desire to aid in finding solutions for the many problems concerning the dis...1943-08-10
2 Woodbury, Angus M.; Cottam, Clarence; Sugden, John W.Annotated check-list of the birds of UtahThe following check-list is a by-product o f studies made by the writers since 1926 in gathering material for a work on The Birds of Utah which is now completed. The list includes four hundred three kinds of birds (species and subspecies) which are admitted to the actual state list and thirty-three ...1949-03
3 Behle, William H.The birds of the deep Creek Mountains of Central Western UtahIn furtherance of a long-time survey of the avifauna of Utah the Deep Creek Mountain region of the central western part of the state was chosen as an area for intensive study. It was expected that gradients would occur in the characters of geographically variable birds between populations from the i...1955-01-10
4 Woodbury, Angus M.Birds of the Navajo CountryThe Navajo country as covered in this paper lies in southeastern Utah and northeastern Arizona and is bounded on the north, west and south by the San Juan, Colorado, Little Colorado and Rio Puerco rivers and on the east by the Arizona-New Mexico state line. That part of the Navajo country lying in n...1945-03-01
5 Behle, William H.The birds of Southeastern UtahSoutheastern Utah is a rugged and colorful portion of the state. As a part of the Colorado Plateau Physiographic Province it is characterized by an arid climate, multicolored but mostly red sandstones, shales and limestones, weathered sand deep box canyons, and high, isolated, lacolithic mountain ra...1960-10
6 Behle, William H.The birds of the Raft River Mountains, Northwestern UtahAs another facet in a long-term analysis of the birds of Utah, an avifaunal survey was made in the northwestern corner of the state. Here the principal physiographic feature is the Raft River Mountains. The main axis of this range runs in an east-west direction paralleling the Utah-Idaho border imme...1958-05-10
7 Behle, William H.; Bushman, John B.; Greenhalgh, Clifton M.Birds of the Kanab area and adjacent high plateaus of Southern UtahThe gateway to central southern Utah is the town of Kanab, located in Kane County just a few miles north of the Utah-Arizona line. At an elevation of 4973 feet it nestles in an indenture in the Vermillion Cliffs where Kanab Canyon emerges. North of these Vermillion Cliffs, rising like two additional...1958-10-01
8 Sekercioglu, CaganThe need to quantify ecosystem services provided by birdsWhat are birds worth-what is their actual dollar value to human society? To most of us in the ornithological community, birds are invaluable. But in these times we need more specific rationales to convince policy makers and business leaders to include bird conservation in land-use and development de...2011-01-01
9 Bradford, NettieProperty rights of animalsThe problem here treated includes the property rights and spatial relationships o f animals, with special reference to the land vertebrates. With little work done in the way of collecting and compiling materials pertaining to this field, the references and literature were widely scattered. Sources o...1946-11-30
10 Ehleringer, James R.; Negus, Norman C.Red Butte Canyon Research Natural Area: history, flora, geology, climate, and ecologyRed Butte Canyon is a protected, near pristine canyon entering Salt Lake Valley, Utah. It contains a well-developed riparian zone and a perennial stream; hillside vegetation ranges from grasslands on the lower limits to Douglas-fir and aspen stands at the upper elevations. In this paper we describe ...Intermountain West; Grassland; Oak-maple; Plant adaptation; Red Butte Canyon Research Natural Area; Human impact1992
11 Sekercioglu, CaganCauses and consequences of bird extinctionsIncreased human domination of the planet has caused the declines and extinctions of countless species. Each species has not only intrinsic value, but ecological functions of organisms are also essential for the integrity of ecosystems that allow people to benefit from essential free ecosystem servic...2003-01-01
12 Clayton, Dale H.Ecological basis of coevolutionary historyMacroevolutionary patterns are difficult to interpret because they are the product of a time scale so vast that deterministic and chance events are hard to distinguish. Although the macroevolutionary history of a group can be reconstructed from extant species, determining the ecological context in ...2003
13 Sekercioglu, CaganThe effects of climate change on tropical birdsBirds are among the most widely studied organisms on earth and represent an important indicator group for learning about the effects of climate change - particularly in regard to the effects of climate change on tropical ecosystems. In this review, we assess the potential impacts of climate change o...2010-01-01
1 - 25 of 13