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Creator | Title | Description | Subject | Date |
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Gondolo, Paolo | Detectability of the Sgr dwarf leading tidal stream with Auger, EUSO, or OWL | We point out that if heavy metastable particles composing the dark matter of our galaxy are responsible for the ultrahigh energy cosmic rays (UHECR) then the leading tidal stream of the Sagittarius dwarf galaxy could be detected through UHECR. The signal would be an anisotropy in the UHECR flux sma... | Sagittarius dwarf galaxy; Sgr stream; anisotropy | 2004-07 |
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Shapiro, Michael D. | Divergence, convergence, and the ancestry of feral populations in the domestic rock pigeon | | Stringham, Sydney A.; Mulroy, Elisabeth E.; Xing, Jinchuan; Record, David; Guernsey, Michael W.; Aldenhoven, Jaclyn T.; Osborne, Edward J. | |
3 |
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Shapiro, Michael D. | Divergence, convergence, and the ancestry of feral populations in the domestic rock pigeon | Domestic pigeons are spectacularly diverse and exhibit variation in more traits than any other bird species [1]. In The Origin of Species, Charles Darwin repeatedly calls attention to the striking variation among domestic pigeon breeds - generated by thousands of years of artificial selection on a s... | | 2010 |
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Kieda, David B. | High resolution charge measurements of UH cosmic ray nuclei using a direct imaging Cherenkov ground-based observatory | The accurate determination of the elemental composition of cosmic rays at high energies is expected to provide crucial clues on the origin of these particles. Here we discuss a technique that has become possible through the use of modern ground-based Cherenkov imaging detectors. We combine a measure... | Cherenkov light; Quark star; UH nuclei; Magnetic monopole | 2003 |
5 |
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Ehleringer, James R. | Gas exchange, δ13C, and heterotrophy for Castilleja linariifolia and Orthocarpus tolmiei, facultative root hemiparasites on Artemisia tridentata | Gas exchange and carbon isotope ratios were measured on 2 facultative hemiparasites, Castilleja linarifolia Benth. (Indian paintbrush; Scrophulariaceae) and Orthocarpus tolmiei I-I. & A. (Tolmie owl clover; Scrophulariaceae), and their Artemisia tridentata L. (big sagebrush; Asteraceae) hosts. Photo... | Heterotrophy; Hemiparasite; Carbon isotope ratios; Shrub ecology; Castilleja linarifolia; Orthocarpus tolmiei; Artemisia tridentata | 1996 |
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Kieda, David B. | Toward a revival of stellar intensity interferometry | Building on technological developments over the last 35 years, intensity interferometry now appears a feasible option by which to achieve diffraction-limited imaging over a square-kilometer synthetic aperture. Upcoming Atmospheric Cherenkov Telescope projects will consist of up to 100 telescopes, ... | Intensity interferometry; Air Cherenkov Telescope | 2008 |
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Adler, Frederick R. | Is space necessary? Interference competition and limits to biodiversity | A single trade-off between competitive ability and mortality has been shown to support an arbitrarily large number of species in models of interference competition in spatially structured populations. We show that this results not from spatial structure, but instead from the assumption that a small ... | Mortality rate; Competitive ability; Seed size | 2000 |
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Ehleringer, James R.; Negus, Norman C. | Red Butte Canyon Research Natural Area: history, flora, geology, climate, and ecology | Red 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 impact | 1992 |
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Sekercioglu, Cagan | Birding economics: conservation through commodification | In the long-run, the quality of our birding (and the length of our lists) depends on our success in conserving birds and their habitats. Who would not love to see a Labrador Duck during a pelagic trip, have Carolina Parakeets fly overhead on a CBC, or photograph a Bachman's Warbler foraging in a can... | | 2003-01-01 |
10 |
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Adler, Frederick R. | Balance of terror: an alternative mechanism for competitive trade-offs and its implications for invading species | This article uses models to propose an explanation for three observations in community ecology: the apparent overreaction of prey to attack by specialist predators, the existence of a common trade-off among components of competitive ability in communities of unrelated competitors, and the ability of... | Models; Curve; Native | 1999 |
11 |
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Sekercioglu, Cagan | Importance of Ethiopian shade coffee farms for forest bird conservation | Coffee is the most important tropical commodity and is grown in high-priority areas for biological conservation. There is abundant literature on the conservation value of coffee farms internationally, but there has been little research on this topic in Africa. Ethiopia is a diverse and little-studie... | | 2014-01-01 |
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Seger, Jon; Davidson, Diane W. | Biological richness of deserts | A desert is "waterless," "treeless," "barren," "remote," "uninteresting," and "presumably uninhabited," according to the authoritative Oxford English Dictionary. The word is derived from deserere, a Latin verb meaning "to leave." In English, to desert is still to "abandon," "forsake," or "fail." Bec... | Desert life; Desert biodiversity | 1995 |
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Adler, Frederick R. | Defended fortresses or moving targets? Another model of inducible defenses inspired by military metaphors | We use a common framework to compare three models of plant strategies to confront herbivory: constitutive defense, optimal inducible defense, and the "moving target." Plants with constitutive defenses retain a fixed defensive phenotype. Plants with optimal inducible defenses respond to attack by inc... | Constitutive defense; optimal inducible defense; phenotype | 1994 |
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Adler, Frederick R. | Construction of multidimensional clustered patterns | Ecological processes often depend upon the patterning, as well as the absolute density, of resources. In this paper, we develop methods for describing pattern from the perspective of the organism encountering and exploiting the resources, and for reconstructing pattern from the description. | Algorithms; clustered resources; foraging | 1994 |
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Sekercioglu, Cagan | The effects of climate change on tropical birds | Birds 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 |
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Clayton, Dale H. | Biology, ecology, and evolution of chewing lice | Chewing lice are small, dorsoventrally compressed insects and are parasites of virtually all birds (Fig. 1) and some mammals (Fig. 2). Many chewing lice are host specific, being found on only a single species of host. All chewing lice are permanent ectoparasites and complete their entire life c... | Chewing lice | 2003 |
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Gondolo, Paolo | Gamma-ray summary report | This paper reviews the field of gamma-ray astronomy and describes future experiments and prospects for advances in fundamental physics and high-energy astrophysics through gamma-ray measurements. We concentrate on recent progress in the understanding of active galaxies, and the use of these sources ... | EGRET; GLAST; VERITAS | 2001 |
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Carrier, David R. | Evidence for endothermic ancestors of crocodiles at the stem of archosaur evolution | Physiological, anatomical, and developmental features of the crocodilian heart support the paleontological evidence that the ancestors of living crocodilians were active and endothermic, but the lineage reverted to ectothermy when it invaded the aquatic, ambush predator niche. In endotherms, there i... | Endothermy; ectothermy; Archosaur evolution; Archosaurs; Crocodilian heart | 2004 |