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1,187 results on '"Holt, Robert D."'

189. Do I build or do I move? Adaptation by habitat construction versus habitat choice*.

Author

Scheiner, Samuel M., Barfield, Michael, and Holt, Robert D.

Subjects
PHENOTYPIC plasticity, HABITATS
Abstract

Trait adaptation to a heterogeneous environment can occur through six modes: genetic differentiation of those traits, a jack‐of‐all‐trades phenotypic uniformity, diversified bet‐hedging, phenotypic plasticity, habitat choice, and habitat construction. A key question is what circumstances favor one mode over another, and how they might interact if a system can express more than one mode at a time. We examined the joint evolution of habitat choice and habitat construction using individual‐based simulations. We manipulated when during the life cycle construction occurred and the fitness value of construction. We found that for our model habitat construction was nearly always favored over habitat choice, especially if construction happened after dispersal. Because of the ways that the various modes of adaptation interact with each other, there is no simple answer as to which will be favored; it depends on details of the biology and ecology of a given system. [ABSTRACT FROM AUTHOR]

Published
2022
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192. Poverty levels, societal and individual heterogeneities explain the SARS-CoV-2 pandemic growth in Latin America

Author

Ponciano, Jos�� Miguel, Ponciano, Juan Adolfo, G��mez, Juan Pablo, Holt, Robert D., and Blackburn, Jason K.

Subjects
Physics - Physics and Society, FOS: Biological sciences, Populations and Evolution (q-bio.PE), FOS: Physical sciences, 62M15, 92C60, Physics and Society (physics.soc-ph), Quantitative Biology - Populations and Evolution
Abstract

Latin America is experiencing severe impacts of the SARS-CoV-2 pandemic, but poverty and weak public health institutions hamper gathering the kind of refined data needed to inform classical SEIR models of epidemics. We present an alternative approach that draws on advances in statistical ecology and conservation biology to enhance the value of sparse data in projecting and ameliorating epidemics. Our approach, leading to what we call a Stochastic Epidemic Gompertz model, with few parameters can flexibly incorporate heterogeneity in transmission within populations and across time. We demonstrate that poverty has a large impact on the course of the pandemic, across fourteen Latin American countries, and show how our approach provides flexible, time-varying projections of disease risk that can be used to refine public health strategies., 22 pages, 5 figures, Supplementary Material not uploaded

Published
2020

193. Appendix to Peniston JH, Barfield M, Gonzalez, Holt RD. Environmental Fluctuations can promote evolutionary rescue in high-extinction-risk scenarios. Proceedings of the Royal Society B: Biological Sciences. (doi:10.1098/rspb.2020.1144) from Environmental fluctuations can promote evolutionary rescue in high-extinction risk scenarios

Author

Peniston, James H., Barfield, Michael, Gonzalez, Andrew, and Holt, Robert D.

Abstract

Contains detailed methods for simulations and analytical model. Also contains 16 supplementary figures.

Published
2020
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198. Coda

Author

Ohgushi, Takayuki, primary, Schmitz, Oswald J., additional, and Holt, Robert D., additional

Published
2012
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199. Introduction

Author

Ohgushi, Takayuki, primary, Schmitz, Oswald J., additional, and Holt, Robert D., additional

Published
2012
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200. Sacred cows and sympathetic squirrels: the importance of biological diversity to human health

Author

Dobson, Andy, Cattadori, Isabella, Holt, Robert D., Ostfeld, Richard S., Keesing, Felicia, Krichbaum, Kristle, Rohr, Jason R., Perkins, Sarah E., and Hudson, Peter J.

Subjects
Biological diversity, Cows, Health, Human-animal relationships, Holy, The, Squirrels
Abstract

Why are cows sacred? Travel anywhere in India and they have the right of way. Travel anywhere in the eastern United States and you'll see squirrels, more than likely, as [...]

Published
2006

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