Imperial College London

ProfessorTimBarraclough

Faculty of Natural SciencesDepartment of Life Sciences (Silwood Park)

Professor of Evolutionary Biology
 
 
 
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Contact

 

+44 (0)20 7594 2247t.barraclough Website

 
 
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Location

 

N2.4Silwood ParkSilwood Park

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Summary

 

Publications

Publication Type
Year
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104 results found

Kontopoulos DG, van Sebille E, Lange M, Yvon-Durocher G, Barraclough T, Pawar Set al., 2018, Phytoplankton thermal responses adapt in the absence of hard thermodynamic constraints

To better predict how populations and communities respond to climatic temperature variation, it is necessary to understand how the shape of the response of fitness-related traits to temperature evolves (the thermal performance curve). Currently, there is disagreement about the extent to which the evolution of thermal performance curves is constrained. One school of thought has argued for the prevalence of thermodynamic constraints through enzyme kinetics, whereas another argues that adaptation can - at least partly - overcome such constraints. To shed further light on this debate, we perform a phylogenetic meta-analysis of the thermal performance curve of growth rate of phytoplankton - a globally important functional group -, controlling for potential environmental effects. We find that thermodynamic constraints have a minor influence on the shape of the curve. In particular, we detect a very weak increase of the maximum curve height with the temperature at which the curve peaks, suggesting a weak "hotter-is-better" constraint. Also, instead of a constant thermal sensitivity of growth across species, as might be expected from strong constraints, we detect phylogenetic signal in this as well as all other curve parameters. Our results suggest that phytoplankton thermal performance curves adapt to thermal environments largely in the absence of hard thermodynamic constraints.

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Schley RJ, de la Estrella M, Perez-Escobar OA, Bruneau A, Barraclough T, Forest F, Klitgard Bet al., 2018, Is Amazonia a 'museum' for Neotropical trees? The evolution of the Brownea clade (Detarioideae, Leguminosae), MOLECULAR PHYLOGENETICS AND EVOLUTION, Vol: 126, Pages: 279-292, ISSN: 1055-7903

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Wilson CG, Nowell RW, Barraclough TG, 2018, Cross-Contamination Explains "Inter and Intraspecific Horizontal Genetic Transfers'' between Asexual Bdelloid Rotifers, CURRENT BIOLOGY, Vol: 28, Pages: 2436-+, ISSN: 0960-9822

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Nowell RW, Almeida P, Wilson CG, Smith TP, Fontaneto D, Crisp A, Micklem G, Tunnacliffe A, Boschetti C, Barraclough TGet al., 2018, Comparative genomics of bdelloid rotifers: Insights from desiccating and nondesiccating species, PLOS BIOLOGY, Vol: 16, ISSN: 1545-7885

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Tang CQ, Orme CDL, Bunnefeld L, Jones FA, Powell S, Chase MW, Barraclough TG, Savolainen Vet al., 2017, Global monocot diversification: geography explains variation in species richness better than environment or biology, BOTANICAL JOURNAL OF THE LINNEAN SOCIETY, Vol: 183, Pages: 1-15, ISSN: 0024-4074

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Humphreys AM, Rydin C, Jonsson KA, Alsop D, Callender-Crowe LM, Barraclough TGet al., 2016, Detecting evolutionarily significant units above the species level using the generalised mixed Yule coalescent method, METHODS IN ECOLOGY AND EVOLUTION, Vol: 7, Pages: 1366-1375, ISSN: 2041-210X

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Fujisawa T, Aswad A, Barraclough TG, 2016, A Rapid and Scalable Method for Multilocus Species Delimitation Using Bayesian Model Comparison and Rooted Triplets, SYSTEMATIC BIOLOGY, Vol: 65, Pages: 759-771, ISSN: 1063-5157

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Rivett DW, Scheuerl T, Culbert CT, Mombrikotb SB, Johnstone E, Barraclough TG, Bell Tet al., 2016, Resource-dependent attenuation of species interactions during bacterial succession, ISME JOURNAL, Vol: 10, Pages: 2259-2268, ISSN: 1751-7362

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Lawrence D, Barraclough TG, 2016, Evolution of resource use along a gradient of stress leads to increased facilitation, OIKOS, Vol: 125, Pages: 1284-1295, ISSN: 0030-1299

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Jordan SMR, Barraclough TG, Rosindell J, 2016, Quantifying the effects of the break up of Pangaea on global terrestrial diversification with neutral theory, PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, Vol: 371, ISSN: 0962-8436

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Lawrence D, Bell T, Barraclough TG, 2016, The Effect of Immigration on the Adaptation of Microbial Communities to Warming, AMERICAN NATURALIST, Vol: 187, Pages: 236-248, ISSN: 0003-0147

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Eyres I, Boschetti C, Crisp A, Smith TP, Fontaneto D, Tunnacliffe A, Barraclough TGet al., 2015, Horizontal gene transfer in bdelloid rotifers is ancient, ongoing and more frequent in species from desiccating habitats, BMC BIOLOGY, Vol: 13, ISSN: 1741-7007

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Fiegna F, Scheuerl T, Moreno-Letelier A, Bell T, Barraclough TGet al., 2015, Saturating effects of species diversity on life-history evolution in bacteria, PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, Vol: 282, ISSN: 0962-8452

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Moreno-Letelier A, Barraclough TG, 2015, Mosaic genetic differentiation along environmental and geographic gradients indicate divergent selection in a white pine species complex, EVOLUTIONARY ECOLOGY, Vol: 29, Pages: 733-748, ISSN: 0269-7653

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Fontaneto D, Barraclough TG, 2015, Do Species Exist in Asexuals? Theory and Evidence from Bdelloid Rotifers, INTEGRATIVE AND COMPARATIVE BIOLOGY, Vol: 55, Pages: 253-263, ISSN: 1540-7063

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Barraclough TG, Humphreys AM, 2015, The evolutionary reality of species and higher taxa in plants: a survey of post-modern opinion and evidence, NEW PHYTOLOGIST, Vol: 207, Pages: 291-296, ISSN: 0028-646X

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Johnson LP, Walton GE, Psichas A, Frost GS, Gibson GR, Barraclough TGet al., 2015, Prebiotics Modulate the Effects of Antibiotics on Gut Microbial Diversity and Functioning in Vitro, NUTRIENTS, Vol: 7, Pages: 4480-4497, ISSN: 2072-6643

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Fiegna F, Moreno-Letelier A, Bell T, Barraclough TGet al., 2015, Evolution of species interactions determines microbial community productivity in new environments, ISME Journal, Vol: 9, Pages: 1235-1245, ISSN: 1751-7362

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Fujisawa T, Vogler AP, Barraclough TG, 2015, Ecology has contrasting effects on genetic variation within species versus rates of molecular evolution across species in water beetles, PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, Vol: 282, ISSN: 0962-8452

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Fujisawa T, Vogler AP, Barraclough TG, 2015, Ecology has contrasting effects on genetic variation within species versus rates of molecular evolution across species in water beetles, Proceedings. Biological sciences / The Royal Society, Vol: 282

Comparative analysis is a potentially powerful approach to study the effects of ecological traits on genetic variation and rate of evolution across species. However, the lack of suitable datasets means that comparative studies of correlates of genetic traits across an entire clade have been rare. Here, we use a large DNA-barcode dataset (5062 sequences) of water beetles to test the effects of species ecology and geographical distribution on genetic variation within species and rates of molecular evolution across species. We investigated species traits predicted to influence their genetic characteristics, such as surrogate measures of species population size, latitudinal distribution and habitat types, taking phylogeny into account. Genetic variation of cytochrome oxidase I in water beetles was positively correlated with occupancy (numbers of sites of species presence) and negatively with latitude, whereas substitution rates across species depended mainly on habitat types, and running water specialists had the highest rate. These results are consistent with theoretical predictions from nearly-neutral theories of evolution, and suggest that the comparative analysis using large databases can give insights into correlates of genetic variation and molecular evolution.

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Barraclough TG, 2015, How Do Species Interactions Affect Evolutionary Dynamics Across Whole Communities?, ANNUAL REVIEW OF ECOLOGY, EVOLUTION, AND SYSTEMATICS, VOL 46, Vol: 46, Pages: 25-48, ISSN: 1543-592X

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Tang CQ, Humphreys AM, Fontaneto D, Barraclough TGet al., 2014, Effects of phylogenetic reconstruction method on the robustness of species delimitation using single-locus data, Methods in Ecology and Evolution, Vol: 5, Pages: 1086-1094, ISSN: 2041-210X

1. Coalescent-based species delimitation methods combine population genetic and phylogenetic theory to provide an objective means for delineating evolutionarily significant units of diversity. The generalised mixed Yule coalescent (GMYC) and the Poisson tree process (PTP) are methods that use ultrametric (GMYC or PTP) or non-ultrametric (PTP) gene trees as input, intended for use mostly with single-locus data such asDNAbarcodes. 2. Here, we assess how robust the GMYC and PTP are to different phylogenetic reconstruction and branch smoothingmethods.We reconstruct over 400 ultrametric trees using up to 30 different combinations of phylogenetic and smoothing methods and perform over 2000 separate species delimitation analyses across 16 empirical data sets. We then assess how variable diversity estimates are, in terms of richness and identity, with respect to species delimitation, phylogenetic and smoothing methods. 3. The PTP method generally generates diversity estimates that are more robust to different phylogenetic methods. The GMYC is more sensitive, but provides consistent estimates for BEAST trees. The lower consistency of GMYC estimates is likely a result of differences among gene trees introduced by the smoothing step. Unresolved nodes (real anomalies or methodological artefacts) affect both GMYC and PTP estimates, but have a greater effect on GMYC estimates. Branch smoothing is a difficult step and perhaps an underappreciated source of bias that may be widespread among studies of diversity and diversification. 4. Nevertheless, careful choice of phylogenetic method does produce equivalent PTP and GMYC diversity estimates. We recommend simultaneous use of the PTP model with any model-based gene tree (e.g. RAxML) and GMYCapproaches with BEAST trees for obtaining species hypotheses.

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Tang CQ, Obertegger U, Fontaneto D, Barraclough TGet al., 2014, SEXUAL SPECIES ARE SEPARATED BY LARGER GENETIC GAPS THAN ASEXUAL SPECIES IN ROTIFERS, EVOLUTION, Vol: 68, Pages: 2901-2916, ISSN: 0014-3820

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Moreno-Letelier A, Mastretta-Yanes A, Barraclough TG, 2014, Late Miocene lineage divergence and ecological differentiation of rare endemic Juniperus blancoi: clues for the diversification of North American conifers, NEW PHYTOLOGIST, Vol: 203, Pages: 335-347, ISSN: 0028-646X

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Humphreys AM, Barraclough TG, 2014, The evolutionary reality of higher taxa in mammals, PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, Vol: 281, ISSN: 0962-8452

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Frost GS, Walton GE, Swann JR, Psichas A, Costabile A, Johnson LP, Sponheimer M, Gibson GR, Barraclough TGet al., 2014, Impacts of Plant-Based Foods in Ancestral Hominin Diets on the Metabolism and Function of Gut Microbiota In Vitro, MBIO, Vol: 5, ISSN: 2150-7511

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Fujisawa T, Barraclough TG, 2013, Delimiting Species Using Single-Locus Data and the Generalized Mixed Yule Coalescent Approach: A Revised Method and Evaluation on Simulated Data Sets, SYSTEMATIC BIOLOGY, Vol: 62, Pages: 707-724, ISSN: 1063-5157

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McInnes L, Jones FA, Orme CDL, Sobkowiak B, Barraclough TG, Chase MW, Govaerts R, Soltis DE, Soltis PS, Savolainen Vet al., 2013, Do Global Diversity Patterns of Vertebrates Reflect Those of Monocots?, PLOS ONE, Vol: 8, ISSN: 1932-6203

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Boschetti C, Carr A, Crisp A, Eyres I, Wang-Koh Y, Lubzens E, Barraclough TG, Micklem G, Tunnacliffe Aet al., 2012, Biochemical Diversification through Foreign Gene Expression in Bdelloid Rotifers, PLOS GENETICS, Vol: 8, ISSN: 1553-7404

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Tang CQ, Leasi F, Obertegger U, Kieneke A, Barraclough TG, Fontaneto Det al., 2012, The widely used small subunit 18S rDNA molecule greatly underestimates true diversity in biodiversity surveys of the meiofauna, PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, Vol: 109, Pages: 16208-16212, ISSN: 0027-8424

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