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  • 1
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    Choice of baseline climate data impacts projected species’ responses to climate change (2016)
    Wiley
    Details
    Publication Date: 2016-03-08
    Description: Climate data created from historic climate observations are integral to most assessments of potential climate change impacts, and frequently comprise the baseline period used to infer species-climate relationships. They are often also central to downscaling coarse resolution climate simulations from General Circulation Models (GCMs) in order to project future climate scenarios at ecologically relevant spatial scales. Uncertainty in these baseline data can be large, particularly where weather observations are sparse and climate dynamics are complex (e.g. over mountainous or coastal regions). Yet, importantly, this uncertainty is almost universally overlooked when assessing potential responses of species to climate change. Here we assessed the importance of historic baseline climate uncertainty for projections of species’ responses to future climate change. We built species distribution models (SDMs) for 895 African bird species of conservation concern, using six different climate baselines. We projected these models to two future periods (2040-2069, 2070-2099), using downscaled climate projections, and calculated species turnover and changes in species-specific climate suitability. We found that the choice of baseline climate data constituted an important source of uncertainty in projections of both species turnover and species-specific climate suitability, often comparable with, or more important than, uncertainty arising from the choice of GCM. Importantly, the relative contribution of these factors to projection uncertainty varied spatially. Moreover, when projecting SDMs to sites of biodiversity importance (Important Bird and Biodiversity Areas), these uncertainties altered site-level impacts, which could affect conservation prioritisation. Our results highlight that projections of species’ responses to climate change are sensitive to uncertainty in the baseline climatology. We recommend that this should be considered routinely in such analyses. This article is protected by copyright. All rights reserved.
    Print ISSN: 1354-1013
    Electronic ISSN: 1365-2486
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Geography
    Published by Wiley
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  • 2
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    The power to detect regional declines in common bird populations using continental monitoring data (2019)
    Wiley
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    Publication Date: 2019
    Description: Abstract Anthropogenic environmental change is driving the rapid loss of biodiversity. Large declines in the abundance of historically common species are now emerging as a major concern. Identifying declining populations through long‐term biodiversity monitoring is vital for implementing timely conservation measures. It is, therefore, critical to evaluate the likelihood that persistent long‐term population trends of a given size could be detected using existing monitoring data and methods. Here, we test the power to detect declines in Australia's common landbirds using long‐term citizen science monitoring. We use spatially explicit simulations of occupancy dynamics and virtual sampling, designed to mimic bird monitoring in better‐sampled regions of Australia, to assess likely power in these data to detect trends relevant for conservation. We predict the statistical power for 326 common species that meet minimum requirements for monitoring data across 10 regions of Australia, estimating the number of species for which we would have a high (≥80%) chance of detecting declines of different sizes. The power to detect declines of ≥30% per decade was predicted to be high for at least one‐third of the common species in 7 of 10 regions, with a total of 103 (32% of 326) unique species sufficiently monitored in at least one region. These species spanned 12 taxonomic orders, four orders of magnitude in body mass, and a broad diversity of dietary guilds, suggesting the current species pool will likely serve as robust indicators for a broad range of environmental states and pressures. Power was strongly affected by species' detectability, and power to detect even large declines was negligible when species are detected on ≤50% of visits to an occupied site. Predicted power for many species fell just short of the 80% threshold in one or more regions, which suggests an increase in effort targeting these species could greatly enhance the species and regional representation of these data. Against the backdrop of unprecedented biodiversity losses, this study shows how critical evaluation of existing monitoring schemes is valuable both for assessing the contribution of citizen science schemes to biodiversity monitoring and for designing strategic monitoring to significantly improve the knowledge these schemes provide.
    Print ISSN: 1051-0761
    Electronic ISSN: 1939-5582
    Topics: Biology
    Published by Wiley on behalf of The Ecological Society of America (ESA).
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  • 3
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    Task-dependent object representations [Neuroscience] (2014)
    National Academy of Sciences
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    Publication Date: 2014-03-12
    Description: Perception reflects an integration of “bottom-up” (sensory-driven) and “top-down” (internally generated) signals. Although models of visual processing often emphasize the central role of feed-forward hierarchical processing, less is known about the impact of top-down signals on complex visual representations. Here, we investigated whether and how the observer’s goals modulate object...
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 4
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    Academy of Natural Sciences: Job Cuts (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-03-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lapolla, John S -- Sheldon, Frederick H -- Remsen, J V -- Brumfield, Robb T -- Baker, D James -- New York, N.Y. -- Science. 2005 Mar 11;307(5715):1560b.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15764586" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Clearance of p16Ink4a-positive senescent cells delays ageing-associated disorders (2011)
    Nature Publishing Group (NPG)
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    Publication Date: 2011-11-04
    Description: Advanced age is the main risk factor for most chronic diseases and functional deficits in humans, but the fundamental mechanisms that drive ageing remain largely unknown, impeding the development of interventions that might delay or prevent age-related disorders and maximize healthy lifespan. Cellular senescence, which halts the proliferation of damaged or dysfunctional cells, is an important mechanism to constrain the malignant progression of tumour cells. Senescent cells accumulate in various tissues and organs with ageing and have been hypothesized to disrupt tissue structure and function because of the components they secrete. However, whether senescent cells are causally implicated in age-related dysfunction and whether their removal is beneficial has remained unknown. To address these fundamental questions, we made use of a biomarker for senescence, p16(Ink4a), to design a novel transgene, INK-ATTAC, for inducible elimination of p16(Ink4a)-positive senescent cells upon administration of a drug. Here we show that in the BubR1 progeroid mouse background, INK-ATTAC removes p16(Ink4a)-positive senescent cells upon drug treatment. In tissues--such as adipose tissue, skeletal muscle and eye--in which p16(Ink4a) contributes to the acquisition of age-related pathologies, life-long removal of p16(Ink4a)-expressing cells delayed onset of these phenotypes. Furthermore, late-life clearance attenuated progression of already established age-related disorders. These data indicate that cellular senescence is causally implicated in generating age-related phenotypes and that removal of senescent cells can prevent or delay tissue dysfunction and extend healthspan.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3468323/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3468323/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, Darren J -- Wijshake, Tobias -- Tchkonia, Tamar -- LeBrasseur, Nathan K -- Childs, Bennett G -- van de Sluis, Bart -- Kirkland, James L -- van Deursen, Jan M -- AG13925/AG/NIA NIH HHS/ -- CA96985/CA/NCI NIH HHS/ -- P30 DK050456/DK/NIDDK NIH HHS/ -- R01 AG013925/AG/NIA NIH HHS/ -- R01 AG013925-14/AG/NIA NIH HHS/ -- R01 CA096985/CA/NCI NIH HHS/ -- R01 CA096985-10/CA/NCI NIH HHS/ -- England -- Nature. 2011 Nov 2;479(7372):232-6. doi: 10.1038/nature10600.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatric and Adolescent Medicine, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22048312" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue/cytology/drug effects/pathology ; Aging/drug effects/*physiology ; Animals ; Bone Marrow Cells/cytology/drug effects ; Cell Aging/drug effects/*physiology ; Cell Count ; Cell Cycle Proteins ; Cells, Cultured ; Cyclin-Dependent Kinase Inhibitor p16/*metabolism ; Eye/cytology/drug effects/pathology ; Female ; Gene Expression ; Genotype ; Longevity/drug effects/physiology ; Male ; Mice ; Mice, Transgenic ; Muscle, Skeletal/cytology/drug effects/pathology ; Phenotype ; Progeria/metabolism ; Protein-Serine-Threonine Kinases/metabolism ; Tacrolimus/analogs & derivatives/pharmacology ; Time Factors ; Weaning
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 6
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    Taking the pulse of the oceans (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-12-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Alverson, Keith -- Baker, D James -- New York, N.Y. -- Science. 2006 Dec 15;314(5806):1657.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17170257" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 7
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    Science and government. An Earth systems science agency (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-07-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schaefer, Mark -- Baker, D James -- Gibbons, John H -- Groat, Charles G -- Kennedy, Donald -- Kennel, Charles F -- Rejeski, David -- New York, N.Y. -- Science. 2008 Jul 4;321(5885):44-5. doi: 10.1126/science.1160192.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18599760" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Atmosphere ; Biodiversity ; Conservation of Natural Resources ; Ecology ; Fresh Water ; Geological Phenomena ; Geology ; Oceanography ; Oceans and Seas ; *Public Policy ; United States ; United States Government Agencies/*organization & administration
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 8
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    Cloudy forecast for weather satellite data (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-12-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, D James -- New York, N.Y. -- Science. 2012 Dec 14;338(6113):1419. doi: 10.1126/science.338.6113.1419-a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23239714" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 9
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    Deep-sea drilling (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-05-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, D J Jr -- Heath, G R -- New York, N.Y. -- Science. 1983 May 27;220(4600):908.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17816006" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 10
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    Naturally occurring p16(Ink4a)-positive cells shorten healthy lifespan (2016)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2016-02-04
    Description: Cellular senescence, a stress-induced irreversible growth arrest often characterized by expression of p16(Ink4a) (encoded by the Ink4a/Arf locus, also known as Cdkn2a) and a distinctive secretory phenotype, prevents the proliferation of preneoplastic cells and has beneficial roles in tissue remodelling during embryogenesis and wound healing. Senescent cells accumulate in various tissues and organs over time, and have been speculated to have a role in ageing. To explore the physiological relevance and consequences of naturally occurring senescent cells, here we use a previously established transgene, INK-ATTAC, to induce apoptosis in p16(Ink4a)-expressing cells of wild-type mice by injection of AP20187 twice a week starting at one year of age. We show that compared to vehicle alone, AP20187 treatment extended median lifespan in both male and female mice of two distinct genetic backgrounds. The clearance of p16(Ink4a)-positive cells delayed tumorigenesis and attenuated age-related deterioration of several organs without apparent side effects, including kidney, heart and fat, where clearance preserved the functionality of glomeruli, cardio-protective KATP channels and adipocytes, respectively. Thus, p16(Ink4a)-positive cells that accumulate during adulthood negatively influence lifespan and promote age-dependent changes in several organs, and their therapeutic removal may be an attractive approach to extend healthy lifespan.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, Darren J -- Childs, Bennett G -- Durik, Matej -- Wijers, Melinde E -- Sieben, Cynthia J -- Zhong, Jian -- Saltness, Rachel A -- Jeganathan, Karthik B -- Verzosa, Grace Casaclang -- Pezeshki, Abdulmohammad -- Khazaie, Khashayarsha -- Miller, Jordan D -- van Deursen, Jan M -- AG041122/AG/NIA NIH HHS/ -- HL111121/HL/NHLBI NIH HHS/ -- P01 AG041122/AG/NIA NIH HHS/ -- R01 CA096985/CA/NCI NIH HHS/ -- R01CA96985/CA/NCI NIH HHS/ -- England -- Nature. 2016 Feb 11;530(7589):184-9. doi: 10.1038/nature16932. Epub 2016 Feb 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatric and Adolescent Medicine, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, USA. ; Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, USA. ; Division of Cardiovascular Surgery, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, USA. ; Department of Immunology, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26840489" target="_blank"〉PubMed〈/a〉
    Keywords: Adipocytes/cytology/pathology/physiology ; Aging/*pathology/*physiology ; Animals ; Apoptosis ; Cell Aging/*physiology ; Cell Separation ; Cell Transformation, Neoplastic/pathology ; Cyclin-Dependent Kinase Inhibitor p16/*metabolism ; Epithelial Cells/cytology/pathology ; Female ; *Health ; Kidney/cytology/pathology/physiology/physiopathology ; Lipodystrophy/pathology ; Longevity/*physiology ; Male ; Mice ; Myocardium/cytology/metabolism/pathology ; Organ Specificity ; Stem Cells/cytology/pathology ; Time Factors
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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