Institution
University of California, Santa Cruz
Education•Santa Cruz, California, United States•
About: University of California, Santa Cruz is a education organization based out in Santa Cruz, California, United States. It is known for research contribution in the topics: Galaxy & Population. The organization has 15541 authors who have published 44120 publications receiving 2759983 citations. The organization is also known as: UCSC & UC, Santa Cruz.
Topics: Galaxy, Population, Stars, Redshift, Star formation
Papers published on a yearly basis
Papers
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TL;DR: A meta-analysis comparing the ecological effects of variation within a species with the effects of species replacement or renewal shows that intraspecific effects may be comparable to, or sometimes stronger than, species effects.
Abstract: Human activity is causing wild populations to experience rapid trait change and local extirpation. The resulting effects on intraspecific variation could have substantial consequences for ecological processes and ecosystem services. Although researchers have long acknowledged that variation among species influences the surrounding environment, only recently has evidence accumulated for the ecological importance of variation within species. We conducted a meta-analysis comparing the ecological effects of variation within a species (intraspecific effects) with the effects of replacement or removal of that species (species effects). We evaluated direct and indirect ecological responses, including changes in abundance (or biomass), rates of ecological processes and changes in community composition. Our results show that intraspecific effects are often comparable to, and sometimes stronger than, species effects. Species effects tend to be larger for direct ecological responses (for example, through consumption), whereas intraspecific effects and species effects tend to be similar for indirect responses (for example, through trophic cascades). Intraspecific effects are especially strong when indirect interactions alter community composition. Our results summarize data from the first generation of studies examining the relative ecological effects of intraspecific variation. Our conclusions can help inform the design of future experiments and the formulation of strategies to quantify and conserve biodiversity.
506 citations
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TL;DR: In this paper, a bi-polar analysis resolves ice edge changes on space/time scales relevant for investigating seasonal ice ocean feedbacks and focuses on spatio-temporal changes in the timing of annual sea ice retreat and advance over 1979/======80 to 2010/11.
Abstract: This bi-polar analysis resolves ice edge changes on
space/time scales relevant for investigating seasonal iceocean
feedbacks and focuses on spatio-temporal changes in
the timing of annual sea ice retreat and advance over 1979/
80 to 2010/11. Where Arctic sea ice decrease is fastest, the
sea ice retreat is now nearly 2 months earlier and subsequent
advance more than 1 month later (compared to 1979/80),
resulting in a 3-month longer summer ice-free season. In
the Antarctic Peninsula and Bellingshausen Sea region, sea
ice retreat is more than 1 month earlier and advance 2 months
later, resulting in a more than 3-month longer summer icefree
season. In contrast, in the western Ross Sea (Antarctica)
region, sea ice retreat and advance are more than 1 month
later and earlier respectively, resulting in a more than
2 month shorter summer ice-free season. Regardless of trend
magnitude or direction, and at latitudes mostly poleward of
70° (N/S), there is strong correspondence between anomalies
in the timings of sea ice retreat and subsequent advance,
but little correspondence between advance and subsequent
retreat. These results support a strong ocean thermal feedback
in autumn in response to changes in spring sea ice
retreat. Further, model calculations suggest different net
ocean heat changes in the Arctic versus Antarctic where
autumn sea ice advance is 1 versus 2 months later. Ocean-atmosphere
changes, particularly in boreal spring and austral
autumn (i.e., during ~March-May), are discussed and compared,
as well as possible inter-hemispheric climate connections.
506 citations
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TL;DR: The first public data release of the DES DR1 dataset is described in this paper, consisting of reduced single-epoch images, co-add images, and co-added source catalogs, and associated products and services.
Abstract: We describe the first public data release of the Dark Energy Survey, DES DR1, consisting of reduced single-epoch images, co-added images, co-added source catalogs, and associated products and services assembled over the first 3 yr of DES science operations. DES DR1 is based on optical/near-infrared imaging from 345 distinct nights (2013 August to 2016 February) by the Dark Energy Camera mounted on the 4 m Blanco telescope at the Cerro Tololo InterAmerican Observatory in Chile. We release data from the DES wide-area survey covering similar to 5000 deg(2) of the southern Galactic cap in five broad photometric bands, grizY. DES DR1 has a median delivered point-spread function of g = 1.12, r = 0.96, i = 0.88, z = 0.84, and Y = 0.'' 90 FWHM, a photometric precision of <1% in all bands, and an astrometric precision of 151 mas. The median co-added catalog depth for a 1.'' 95 diameter aperture at signal-to-noise ratio (S/N) = 10 is g = 24.33, r = 24.08, i = 23.44, z = 22.69, and Y = 21.44 mag. DES DR1 includes nearly 400 million distinct astronomical objects detected in similar to 10,000 co-add tiles of size 0.534 deg(2) produced from similar to 39,000 individual exposures. Benchmark galaxy and stellar samples contain similar to 310 million and similar to 80 million objects, respectively, following a basic object quality selection. These data are accessible through a range of interfaces, including query web clients, image cutout servers, jupyter notebooks, and an interactive co-add image visualization tool. DES DR1 constitutes the largest photometric data set to date at the achieved depth and photometric precision.
506 citations
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University of Maryland, College Park1, Duke University2, University of California, Santa Cruz3, University of New Mexico4, Princeton University5, Ecological Society of America6, David and Lucile Packard Foundation7, United States Geological Survey8, Johns Hopkins University9, University of Calgary10, Stanford University11, University of Michigan12, University of California, Santa Barbara13, University of Colorado Boulder14, University of Wisconsin-Madison15
TL;DR: The authors of this Policy Forum describe changes that are required if the authors hope to meet the needs and aspirations of humans while improving the health of their planet9s ecosystems.
Abstract: Within the next 50 to 100 years, the support and maintenance of an extended human family of 8 to 11 billion people will be difficult at best. The authors of this
Policy Forum
describe changes that are required if we hope to meet the needs and aspirations of humans while improving the health of our planet9s ecosystems. Problems as diverse as disease transmission and global climate change have benefited substantially from advances in ecology. Such advances have set the stage for emergence of a proactive ecological science in which social and political realities are acknowledged and attention is turned decisively toward the future. The ecological sciences must chart an understanding of how ecosystem services can persist given their extensive human use. Innovative research on the sciences of ecosystem services, ecological restoration, and ecological design must be massively accelerated and must be accompanied by more effective communication of ecological knowledge to society.
506 citations
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TL;DR: In this article, detailed measurements of the electron performance of the ATLAS detector at the LHC were reported, using decays of the Z, W and J/psi particles.
Abstract: Detailed measurements of the electron performance of the ATLAS detector at the LHC are reported, using decays of the Z, W and J/psi particles. Data collected in 2010 at root s = 7 TeV are used, corresponding to an integrated luminosity of almost 40 pb(-1). The inter-alignment of the inner detector and the electromagnetic calorimeter, the determination of the electron energy scale and resolution, and the performance in terms of response uniformity and linearity are discussed. The electron identification, reconstruction and trigger efficiencies, as well as the charge misidentification probability, are also presented.
505 citations
Authors
Showing all 15733 results
Name | H-index | Papers | Citations |
---|---|---|---|
David J. Schlegel | 193 | 600 | 193972 |
David R. Williams | 178 | 2034 | 138789 |
John R. Yates | 177 | 1036 | 129029 |
David Haussler | 172 | 488 | 224960 |
Evan E. Eichler | 170 | 567 | 150409 |
Anton M. Koekemoer | 168 | 1127 | 106796 |
Mark Gerstein | 168 | 751 | 149578 |
Alexander S. Szalay | 166 | 936 | 145745 |
Charles M. Lieber | 165 | 521 | 132811 |
Jorge E. Cortes | 163 | 2784 | 124154 |
M. Razzano | 155 | 515 | 106357 |
Lars Hernquist | 148 | 598 | 88554 |
Aaron Dominguez | 147 | 1968 | 113224 |
Taeghwan Hyeon | 139 | 563 | 75814 |
Garth D. Illingworth | 137 | 505 | 61793 |