Institution
University of British Columbia
Education•Vancouver, British Columbia, Canada•
About: University of British Columbia is a education organization based out in Vancouver, British Columbia, Canada. It is known for research contribution in the topics: Population & Health care. The organization has 89939 authors who have published 209679 publications receiving 9226862 citations. The organization is also known as: UBC & The University of British Columbia.
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TL;DR: Analysis of longitudinal data from unmanaged old forests in the western United States showed that background (noncatastrophic) mortality rates have increased rapidly in recent decades, with doubling periods ranging from 17 to 29 years among regions.
Abstract: Persistent changes in tree mortality rates can alter forest structure, composition, and ecosystem services such as carbon sequestration. Our analyses of longitudinal data from unmanaged old forests in the western United States showed that background (noncatastrophic) mortality rates have increased rapidly in recent decades, with doubling periods ranging from 17 to 29 years among regions. Increases were also pervasive across elevations, tree sizes, dominant genera, and past fire histories. Forest density and basal area declined slightly, which suggests that increasing mortality was not caused by endogenous increases in competition. Because mortality increased in small trees, the overall increase in mortality rates cannot be attributed solely to aging of large trees. Regional warming and consequent increases in water deficits are likely contributors to the increases in tree mortality rates.
1,588 citations
TL;DR: It is shown that the biomass, growth and reproduction of alpine plant species are higher when other plants are nearby, and that competition generally, but not exclusively, dominates interactions at lower elevations where conditions are less physically stressful.
Abstract: Plants can have positive effects on each other. For example, the accumulation of nutrients, provision of shade, amelioration of disturbance, or protection from herbivores by some species can enhance the performance of neighbouring species. Thus the notion that the distributions and abundances of plant species are independent of other species may be inadequate as a theoretical underpinning for understanding species coexistence and diversity. But there have been no large-scale experiments designed to examine the generality of positive interactions in plant communities and their importance relative to competition. Here we show that the biomass, growth and reproduction of alpine plant species are higher when other plants are nearby. In an experiment conducted in subalpine and alpine plant communities with 115 species in 11 different mountain ranges, we find that competition generally, but not exclusively, dominates interactions at lower elevations where conditions are less physically stressful. In contrast, at high elevations where abiotic stress is high the interactions among plants are predominantly positive. Furthermore, across all high and low sites positive interactions are more important at sites with low temperatures in the early summer, but competition prevails at warmer sites.
1,587 citations
University of Southern California1, Duke University2, Stockholm School of Economics3, Center for Open Science4, University of Virginia5, University of Amsterdam6, University of Pennsylvania7, University of North Carolina at Chapel Hill8, University of Regensburg9, California Institute of Technology10, New York University11, Research Institute of Industrial Economics12, Cardiff University13, Northwestern University14, Mathematica Policy Research15, Ohio State University16, University of Sussex17, Texas A&M University18, Royal Holloway, University of London19, University of Zurich20, University of Melbourne21, University of Wisconsin-Madison22, University of Michigan23, Stanford University24, Rutgers University25, Columbia University26, University of Washington27, University of Edinburgh28, National University of Singapore29, Utrecht University30, Arizona State University31, Princeton University32, University of California, Los Angeles33, Imperial College London34, University of Innsbruck35, Harvard University36, University of Chicago37, University of Pittsburgh38, University of Notre Dame39, University of California, Berkeley40, Johns Hopkins University41, University of Bristol42, University of New South Wales43, Dartmouth College44, Whitman College45, University of Puerto Rico46, University of Milan47, University of California, Irvine48, Paris Dauphine University49, University of British Columbia50, Ludwig Maximilian University of Munich51, Purdue University52, Washington University in St. Louis53, University of California, Davis54, Microsoft55
TL;DR: The default P-value threshold for statistical significance is proposed to be changed from 0.05 to 0.005 for claims of new discoveries in order to reduce uncertainty in the number of discoveries.
Abstract: We propose to change the default P-value threshold for statistical significance from 0.05 to 0.005 for claims of new discoveries.
1,586 citations
National University of Cordoba1, Addis Ababa University2, National Autonomous University of Mexico3, State University of Campinas4, United Nations Environment Programme5, UNESCO6, United States Department of Agriculture7, Indiana University8, University of British Columbia9, Commonwealth Scientific and Industrial Research Organisation10, University of Paris-Sud11, Landcare Research12, University College London13, Autonomous University of Madrid14, University of Cambridge15, Council for Scientific and Industrial Research16, University of Southern Denmark17, United Nations University18, Virginia Tech College of Natural Resources and Environment19, The Nature Conservancy20, University of the South Pacific21, University of East Anglia22, Kyushu University23, King Abdulaziz City for Science and Technology24, University of Washington25, Budapest University of Technology and Economics26, Environmental Law Institute27, Ankara University28, University of Portsmouth29, Chinese Academy of Sciences30, Indian Institute of Technology Bombay31, Kyoto University32, Joseph Fourier University33, National Scientific and Technical Research Council34, University of Yaoundé35, Polish Academy of Sciences36, University of São Paulo37, École Normale Supérieure38, University of Otago39, Stanford University40, University of Queensland41, Azim Premji University42, Helmholtz Centre for Environmental Research - UFZ43, University of Ghana44, Corvinus University of Budapest45, Stockholm University46, Lakehead University47, Indian Institute of Forest Management48, Seoul National University49, Sofia University50
TL;DR: The first public product of the Intergovernmental Platform on Biodiversity and Ecosystem Services (IPBES) is its Conceptual Framework as discussed by the authors, which will underpin all IPBES functions and provide structure and comparability to the syntheses that will produce at different spatial scales, on different themes, and in different regions.
1,585 citations
TL;DR: In this paper, the authors obtained normative information for the Parenting Sense of Competence (PSOC) scale from 297 mothers and 215 fathers of 4- to 9-year-old boys and girls.
Abstract: We obtained normative information for the Parenting Sense of Competence (PSOC) scale from 297 mothers and 215 fathers of 4- to 9-year-old boys and girls. Principal-components analysis of the PSOC revealed two factors: Satisfaction, an affective dimension reflecting parenting frustration, anxiety, and motivation; and Efficacy, an instrumental dimension reflecting competence, problem-solving ability, and capability in the parenting role Significant inverse relationships were found between perceptions of child behavior problems and of parenting. For mothers, reported child behavior problems related to parenting satisfaction. For fathers, child behavior problems related both to satisfaction and efficacy as a parent. Mother and father reports of parenting were positively correlated; however, fathers obtained significantly higher scores than mother, particularly on the Satisfaction dimension. PSOC scores did not vary as a function of child age or sex.
1,584 citations
Authors
Showing all 90682 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Gordon H. Guyatt | 231 | 1620 | 228631 |
| John C. Morris | 183 | 1441 | 168413 |
| Douglas Scott | 178 | 1111 | 185229 |
| John R. Yates | 177 | 1036 | 129029 |
| Deborah J. Cook | 173 | 907 | 148928 |
| Richard A. Gibbs | 172 | 889 | 249708 |
| Evan E. Eichler | 170 | 567 | 150409 |
| James F. Sallis | 169 | 825 | 144836 |
| Michael Snyder | 169 | 840 | 130225 |
| Jiawei Han | 168 | 1233 | 143427 |
| Michael Kramer | 167 | 1713 | 127224 |
| Bruce L. Miller | 163 | 1153 | 115975 |
| Peter A. R. Ade | 162 | 1387 | 138051 |
| Marc W. Kirschner | 162 | 457 | 102145 |
| Kaj Blennow | 160 | 1845 | 116237 |