Search

Your search keyword '"Long, Robert P."' showing total 4 results
Start Over Author "Long, Robert P." Publisher escholarship, university of california
4 results on '"Long, Robert P."'

1. Urbanization, climate and species traits shape mammal communities from local to continental scales

Author

Haight, Jeffrey D, Hall, Sharon J, Fidino, Mason, Adalsteinsson, Solny A, Ahlers, Adam A, Angstmann, Julia, Anthonysamy, Whitney JB, Biro, Elizabeth, Collins, Merri K, Dugelby, Barbara, Gallo, Travis, Green, Austin M, Hartley, Laura, Jordan, Mark J, Kay, Cria AM, Lehrer, Elizabeth W, Long, Robert A, MacDougall, Brandon, Magle, Seth B, Minier, Darren E, Mowry, Chris, Murray, Maureen, Nininger, Kristina, Pendergast, Mary E, Remine, Katie R, Ryan, Travis, Salsbury, Carmen, Schell, Christopher J, Șekercioğlu, Çagan H, Shier, Catherine J, Simon, Kelly C, St. Clair, Colleen C, Stankowich, Theodore, Stevenson, Cassondra J, Wayne, Lisa, Will, Dave, Williamson, Jacque, Wilson, Larry, Zellmer, Amanda J, and Lewis, Jesse S

Subjects
Climate Change Impacts and Adaptation, Ecological Applications, Biological Sciences, Ecology, Environmental Management, Environmental Sciences, Life on Land, Evolutionary biology, Environmental management
Abstract

Human-driven environmental changes shape ecological communities from local to global scales. Within cities, landscape-scale patterns and processes and species characteristics generally drive local-scale wildlife diversity. However, cities differ in their structure, species pools, geographies and histories, calling into question the extent to which these drivers of wildlife diversity are predictive at continental scales. In partnership with the Urban Wildlife Information Network, we used occurrence data from 725 sites located across 20 North American cities and a multi-city, multi-species occupancy modelling approach to evaluate the effects of ecoregional characteristics and mammal species traits on the urbanization-diversity relationship. Among 37 native terrestrial mammal species, regional environmental characteristics and species traits influenced within-city effects of urbanization on species occupancy and community composition. Species occupancy and diversity were most negatively related to urbanization in the warmer, less vegetated cities. Additionally, larger-bodied species were most negatively impacted by urbanization across North America. Our results suggest that shifting climate conditions could worsen the effects of urbanization on native wildlife communities, such that conservation strategies should seek to mitigate the combined effects of a warming and urbanizing world.

Published
2023

2. HOx chemistry during INTEX‐A 2004: Observation, model calculation, and comparison with previous studies

Author

Ren, Xinrong, Olson, Jennifer R, Crawford, James H, Brune, William H, Mao, Jingqiu, Long, Robert B, Chen, Zhong, Chen, Gao, Avery, Melody A, Sachse, Glen W, Barrick, John D, Diskin, Glenn S, Huey, L Greg, Fried, Alan, Cohen, Ronald C, Heikes, Brian, Wennberg, Paul O, Singh, Hanwant B, Blake, Donald R, and Shetter, Richard E

Subjects
Meteorology & Atmospheric Sciences
Abstract

OH and HO2 were measured with the Airborne Tropospheric Hydrogen Oxides Sensor (ATHOS) as part of a large measurement suite from the NASA DC-8 aircraft during the Intercontinental Chemical Transport Experiment-A (INTEX-A). This mission, which was conducted mainly over North America and the western Atlantic Ocean in summer 2004, was an excellent test of atmospheric oxidation chemistry. The HOx results from INTEX-A are compared to those from previous campaigns and to results for other related measurements from. INTEX-A. Throughout the troposphere, observed OH was generally 0.95 of modeled OH; below 8 km, observed HO2 was generally 1.20 of modeled HO2. This observed-to-modeled comparison is similar to that for TRACE-P, another midlatitude study for which the median observed-to-modeled ratio was 1.08 for OH and 1.34 for HO2, and to that for PEM-TB, a tropical study for which the median observed-to-modeled ratio was 1.17 for OH and 0.97 for HO2. HO2 behavior above 8 km was markedly different. The observed-to-modeled HO2 ratio increased from ∼1.2 at 8 km to ∼3 at 11 km with the observed-to-modeled ratio correlating with NO. Above 8 km, the observed-to-modeled HO2 and observed NO were both considerably greater than observations from previous campaigns. In addition, the observed-to-modeled HO2/OH, which is sensitive to cycling reactions between OH and HO2, increased from ∼1.5 at 8 km to almost 3.5 at 11 km. These discrepancies suggest a large unknown HOx source and additional reactants that cycle HOx from OH to HO2. In the continental planetary boundary layer, the observed-to-modeled OH ratio increased from 1 when isoprene was less than 0.1 ppbv to over 4 when isoprene was greater than 2 ppbv, suggesting that forests throughout the United States are emitting unknown HOx sources. Progress in resolving these discrepancies requires a focused research activity devoted to further examination of possible unknown OH sinks and HOx sources. Copyright 2008 by the American Geophysical Union.

Published
2008

3. Salir de desierto : : Dissident Artistic Expression under Franco, 1936-1975

Author

Long, Robert Lincoln

Subjects
Antonio-José 1902-1936, López-Pacheco, Jesús 1930-, Tàpies, Antoni 1923-2012, UCSD Dissertations, Academic History. (Discipline), Spain Arts Censorship History 20th century, Spain Arts, Spanish Censorship History 20th century, Spain Arts, Spanish Government policy History 20th century, Spain Artists Censorship History 20th century, Spain Biography Artists 20th century
Abstract

From the beginning of the Spanish Civil War (1936-1939) and through the years of the authoritarian Francoist regime (1936-1975), the survival of artistic expression in Spain of artists sympathetic to the ideals of the defeated Republic was constantly challenged. Whether threatened with execution if caught in Nationalist-held territory during the war or with harassment, and imprisonment after the war, these Spanish artists were simultaneously faced with choices of a profoundly personal and aesthetic nature. The Francoist regime's traditionalist cultural project, National Catholicism, through its control of the public sphere, especially through its censorship, threatened not only the rights of free expression, but, at times, the lives of artists themselves. In order to secure a means for their artistic expression, artists were forced into life-altering decisions. In this dissertation, I examine the biographies and art of three Spanish artists, composer Antonio José Martínez Palacios, poet and novelist Jesús López Pacheco, and abstract expressionist painter Antoní Tàpies, whose lives intersected the regime. I propose an underlying primary theses, which plays out on three levels : 1) Although obstructed at times by the Francoist regime, the voices of these artists would continue sounding; 2) although the regime attempted to manipulate their art for its purposes, in fact, that manipulation only made the artists' voices grow stronger, and finally; 3) although the regime attempted to block the presentation of their art, and in effect re-write history, the creative voices of these three artists have over time, if anything, become a stronger and more precise lens with which to historically analyze the Francoist repression. In that respect, I argue that the ultimate success lies with the narratives and the purposes of these artists. This work divides the stories of the three artists in a broad chronology starting with Antonio José and ending with Antoni Tàpies. Each artist is the focus of two chapters with the first of those being a more biographical analysis of the artist's life and work. The second chapter on each artist pertains more specifically to their work's intersection with the repression of the regime. This organization provides an opportunity for overlapping comparisons of their times, their disciplines over the entirety of the regime's existence, and an assessment of the regime's own cultural project

Published
2014

Catalog

Books, media, physical & digital resources
See catalog results