1
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Caughman AM, Gaines SD, Bradley D. Climate change reduces long-term population benefits from no-take marine protected areas through selective pressures on species movement. GLOBAL CHANGE BIOLOGY 2024; 30:e17240. [PMID: 38511480 DOI: 10.1111/gcb.17240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 02/23/2024] [Accepted: 03/02/2024] [Indexed: 03/22/2024]
Abstract
Marine protected areas (MPAs) are important conservation tools that confer ecosystem benefits by removing fishing within their borders to allow stocks to rebuild. Fishing mortality outside a traditionally fixed MPA can exert selective pressure for low movement alleles, resulting in enhanced protection. While evolving to move less may be useful for conservation presently, it could be detrimental in the face of climate change for species that need to move to track their thermal optimum. Here, we build a spatially explicit simulation model to assess the impact of movement evolution in and around static MPAs resulting from both fishing mortality and temperature-dependent natural mortality on conservation benefits across five climate scenarios: (i) linear mean temperature shift, (ii) El Niño/La Niña conditions, (iii) heat waves, (iv) heatwaves with a mean temperature shift, and (v) no climate change. While movement evolution allows populations within MPAs to survive longer, we find that over time, climate change degrades the benefits by selecting for higher movement genotypes. Resulting population declines within MPAs are faster than expected based on climate mortality alone, even within the largest MPAs. Our findings suggest that while static MPAs may conserve species for a time, other strategies, such as dynamic MPA networks or assisted migration, may also be required to effectively incorporate climate change into conservation planning.
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Affiliation(s)
- Alicia M Caughman
- Bren School of Environmental Science and Management, University of California, Santa Barbara, Santa Barbara, California, USA
| | - Steven D Gaines
- Bren School of Environmental Science and Management, University of California, Santa Barbara, Santa Barbara, California, USA
| | - Darcy Bradley
- Bren School of Environmental Science and Management, University of California, Santa Barbara, Santa Barbara, California, USA
- Marine Science Institute, University of California, Santa Barbara, Santa Barbara, California, USA
- The Nature Conservancy, California Oceans Program, Santa Barbara, California, USA
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2
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How mutation shapes the rate of population spread in the presence of a mate-finding Allee effect. THEOR ECOL-NETH 2022. [DOI: 10.1007/s12080-022-00540-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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3
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Bernos TA, Jeffries KM, Mandrak NE. Aquatic invasive species specialists’ perceptions on the importance of genetic tools and concepts to inform management. Biol Invasions 2022. [DOI: 10.1007/s10530-022-02758-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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4
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Oldfather MF, Van Den Elzen CL, Heffernan PM, Emery NC. Dispersal evolution in temporally variable environments: implications for plant range dynamics. AMERICAN JOURNAL OF BOTANY 2021; 108:1584-1594. [PMID: 34587290 DOI: 10.1002/ajb2.1739] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 05/21/2021] [Accepted: 05/24/2021] [Indexed: 06/13/2023]
Abstract
Dispersal-the movement of an individual from the site of birth to a different site for reproduction-is an ecological and evolutionary driver of species ranges that shapes patterns of colonization, connectivity, gene flow, and adaptation. In plants, the traits that influence dispersal often vary within and among species, are heritable, and evolve in response to the fitness consequences of moving through heterogeneous landscapes. Spatial and temporal variation in the quality and quantity of habitat are important sources of selection on dispersal strategies across species ranges. While recent reviews have evaluated the interactions between spatial variation in habitat and dispersal dynamics, the extent to which geographic variation in temporal variability can also shape range-wide patterns in dispersal traits has not been synthesized. In this paper, we summarize key predictions from metapopulation models that evaluate how dispersal evolves in response to spatial and temporal habitat variability. Next, we compile empirical data that quantify temporal variability in plant demography and patterns of dispersal trait variation across species ranges to evaluate the hypothesis that higher temporal variability favors increased dispersal at plant range limits. We found some suggestive evidence supporting this hypothesis while more generally identifying a major gap in empirical work evaluating plant metapopulation dynamics across species ranges and geographic variation in dispersal traits. To address this gap, we propose several future research directions that would advance our understanding of the interplay between spatiotemporal variability and dispersal trait variation in shaping the dynamics of current and future species ranges.
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Affiliation(s)
- Meagan F Oldfather
- Department of Ecology and Evolutionary Biology, University of Colorado Boulder, CO 80309, USA
| | | | - Patrick M Heffernan
- Department of Ecology and Evolutionary Biology, University of Colorado Boulder, CO 80309, USA
| | - Nancy C Emery
- Department of Ecology and Evolutionary Biology, University of Colorado Boulder, CO 80309, USA
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5
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Block S, Levine JM. How Dispersal Evolution and Local Adaptation Affect the Range Dynamics of Species Lagging Behind Climate Change. Am Nat 2021; 197:E173-E187. [PMID: 33989146 DOI: 10.1086/714130] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
AbstractAs climate changes, species' ability to spatially track suitable climate depends on their spread velocity, a function of their population growth and dispersal capacity. When climate changes faster than species can spread, the climate experienced at species' expanding range edges may ameliorate as conditions become increasingly similar to those of the range core. When this boosts species' growth rates, their spread accelerates. Here, we use simulations of a spreading population with an annual life history to explore how climatic amelioration interacts with dispersal evolution and local adaptation to determine the dynamics of spread. We found that depending on the timing of dispersal evolution, spread velocity can show contrasting trajectories, sometimes transiently exceeding the climate velocity before decelerating. Climatic amelioration can also accelerate the spread of populations composed of genotypes best adapted to local climatic conditions, but the exact dynamics depends on the pattern of climatic adaptation. We conclude that failing to account for demographic variation across climatic gradients can lead to erroneous conclusions about species' capacity to spatially track suitable climate.
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6
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Urquhart CA, Williams JL. Trait correlations and landscape fragmentation jointly alter expansion speed via evolution at the leading edge in simulated range expansions. THEOR ECOL-NETH 2021. [DOI: 10.1007/s12080-021-00503-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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7
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Azimzade Y, Sasar M, Maleki I. Invasion front dynamics in disordered environments. Sci Rep 2020; 10:18231. [PMID: 33106618 PMCID: PMC7588433 DOI: 10.1038/s41598-020-75366-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 10/15/2020] [Indexed: 12/25/2022] Open
Abstract
Invasion occurs in environments that are normally spatially disordered, however, the effect of such a randomness on the dynamics of the invasion front has remained less understood. Here, we study Fisher's equation in disordered environments both analytically and numerically. Using the Effective Medium Approximation, we show that disorder slows down invasion velocity and for ensemble average of invasion velocity in disordered environment we have [Formula: see text] where [Formula: see text] is the amplitude of disorder and [Formula: see text] is the invasion velocity in the corresponding homogeneous environment given by [Formula: see text]. Additionally, disorder imposes fluctuations on the invasion front. Using a perturbative approach, we show that these fluctuations are Brownian with a diffusion constant of: [Formula: see text]. These findings were approved by numerical analysis. Alongside this continuum model, we use the Stepping Stone Model to check how our findings change when we move from the continuum approach to a discrete approach. Our analysis suggests that individual-based models exhibit inherent fluctuations and the effect of environmental disorder becomes apparent for large disorder intensity and/or high carrying capacities.
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Affiliation(s)
- Youness Azimzade
- Department of Physics, University of Tehran, 14395-547, Tehran, Iran.
| | - Mahdi Sasar
- Department of Physics, University of Tehran, 14395-547, Tehran, Iran
| | - Iraj Maleki
- Department of Physics, University of Tehran, 14395-547, Tehran, Iran
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8
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Miller TEX, Angert AL, Brown CD, Lee-Yaw JA, Lewis M, Lutscher F, Marculis NG, Melbourne BA, Shaw AK, Szűcs M, Tabares O, Usui T, Weiss-Lehman C, Williams JL. Eco-evolutionary dynamics of range expansion. Ecology 2020; 101:e03139. [PMID: 32697876 DOI: 10.1002/ecy.3139] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 05/05/2020] [Accepted: 06/08/2020] [Indexed: 01/31/2023]
Abstract
Understanding the movement of species' ranges is a classic ecological problem that takes on urgency in this era of global change. Historically treated as a purely ecological process, range expansion is now understood to involve eco-evolutionary feedbacks due to spatial genetic structure that emerges as populations spread. We synthesize empirical and theoretical work on the eco-evolutionary dynamics of range expansion, with emphasis on bridging directional, deterministic processes that favor evolved increases in dispersal and demographic traits with stochastic processes that lead to the random fixation of alleles and traits. We develop a framework for understanding the joint influence of these processes in changing the mean and variance of expansion speed and its underlying traits. Our synthesis of recent laboratory experiments supports the consistent role of evolution in accelerating expansion speed on average, and highlights unexpected diversity in how evolution can influence variability in speed: results not well predicted by current theory. We discuss and evaluate support for three classes of modifiers of eco-evolutionary range dynamics (landscape context, trait genetics, and biotic interactions), identify emerging themes, and suggest new directions for future work in a field that stands to increase in relevance as populations move in response to global change.
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Affiliation(s)
- Tom E X Miller
- Program in Ecology and Evolutionary Biology, Department of BioSciences, Rice University, Houston, Texas, 77005, USA
| | - Amy L Angert
- Department of Botany, University of British Columbia, Vancouver, British Columbia, V6T 1Z2, Canada
| | - Carissa D Brown
- Department of Geography, Memorial University, 230 Elizabeth Avenue, St John's, Newfoundland and Labrador, A1B 3X9, Canada
| | - Julie A Lee-Yaw
- Department of Botany, University of British Columbia, Vancouver, British Columbia, V6T 1Z2, Canada.,Department of Biological Sciences, University of Lethbridge, 4401 University Drive, Lethbridge, Alberta, T1K 3M4, Canada
| | - Mark Lewis
- Department of Mathematical and Statistical Sciences, University of Alberta, Edmonton, Alberta, T6G 2G1, Canada.,Department of Biological Sciences, University of Alberta, Edmonton, Alberta, T6G 2G1, Canada
| | - Frithjof Lutscher
- Department of Mathematics and Statistics, and Department of Biology, University of Ottawa, Ottawa, Ottawa, K1N 6N5, Canada
| | - Nathan G Marculis
- Department of Mathematical and Statistical Sciences, University of Alberta, Edmonton, Alberta, T6G 2G1, Canada.,Department of Environmental Science and Policy, University of California-Davis, Davis, California, 95616, USA
| | - Brett A Melbourne
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, Colorado, 80309, USA
| | - Allison K Shaw
- Department of Ecology, Evolution, and Behavior, University of Minnesota, St. Paul, Minnesota, 55108, USA
| | - Marianna Szűcs
- Department of Entomology, Michigan State University, 288 Farm Lane, East Lansing, Michigan, 48824, USA
| | - Olivia Tabares
- Department of Geography and Biodiversity Research Centre, University of British Columbia, 1984 West Mall, Vancouver, British Columbia, V6T 1Z2, Canada
| | - Takuji Usui
- Department of Botany, University of British Columbia, Vancouver, British Columbia, V6T 1Z2, Canada
| | - Christopher Weiss-Lehman
- Department of Ecology, Evolution, and Behavior, University of Minnesota, St. Paul, Minnesota, 55108, USA
| | - Jennifer L Williams
- Department of Geography and Biodiversity Research Centre, University of British Columbia, 1984 West Mall, Vancouver, British Columbia, V6T 1Z2, Canada
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9
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Shigesada et al. (1986) and population spread in heterogeneous environments. Theor Popul Biol 2020; 133:27-28. [DOI: 10.1016/j.tpb.2019.07.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 06/19/2019] [Accepted: 07/01/2019] [Indexed: 11/20/2022]
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10
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Schreiber SJ, Beckman NG. Individual variation in dispersal and fecundity increases rates of spatial spread. AOB PLANTS 2020; 12:plaa001. [PMID: 32528638 PMCID: PMC7273335 DOI: 10.1093/aobpla/plaa001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 05/08/2020] [Indexed: 05/06/2023]
Abstract
Dispersal and fecundity are two fundamental traits underlying the spread of populations. Using integral difference equation models, we examine how individual variation in these fundamental traits and the heritability of these traits influence rates of spatial spread of populations along a one-dimensional transect. Using a mixture of analytic and numerical methods, we show that individual variation in dispersal rates increases spread rates and the more heritable this variation, the greater the increase. In contrast, individual variation in lifetime fecundity only increases spread rates when some of this variation is heritable. The highest increases in spread rates occur when variation in dispersal positively co-varies with fecundity. Our results highlight the importance of estimating individual variation in dispersal rates, dispersal syndromes in which fecundity and dispersal co-vary positively and heritability of these traits to predict population rates of spatial spread.
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Affiliation(s)
- Sebastian J Schreiber
- Department of Evolution and Ecology and Center for Population Biology, University of California, Davis, CA, USA
- Corresponding author’s email address:
| | - Noelle G Beckman
- Department of Biology and Ecology Center, Utah State University, Logan, UT, USA
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11
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Bélouard N, Paillisson J, Oger A, Besnard A, Petit EJ. Genetic drift during the spread phase of a biological invasion. Mol Ecol 2019; 28:4375-4387. [DOI: 10.1111/mec.15238] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 08/27/2019] [Accepted: 08/27/2019] [Indexed: 12/28/2022]
Affiliation(s)
- Nadège Bélouard
- UMR ECOBIO CNRS Université de Rennes 1 Rennes France
- UMR ESE Ecology and Ecosystem Health INRA, Agrocampus Ouest Rennes France
| | | | - Adrien Oger
- UMR ECOBIO CNRS Université de Rennes 1 Rennes France
| | - Anne‐Laure Besnard
- UMR ESE Ecology and Ecosystem Health INRA, Agrocampus Ouest Rennes France
| | - Eric J. Petit
- UMR ESE Ecology and Ecosystem Health INRA, Agrocampus Ouest Rennes France
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12
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Patchy spread patterns in three-species bistable systems with facultative mutualism. Biosystems 2019; 177:24-33. [PMID: 30659865 DOI: 10.1016/j.biosystems.2019.01.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Revised: 01/08/2019] [Accepted: 01/15/2019] [Indexed: 11/21/2022]
Abstract
A three-species population system under a facultative mutualistic relationship of one of the species is studied. The considered interactions are as follows: facultative between the first species and the second species, obligatory mutualism between the second species and the first one, and the third species is a predator of the first species. For this purpose, we extend the model proposed by Morozov et al., originally used to describe obligatory mutualism, to consider obligatory and facultative mutualism and prove that under adequately selected parameters this system produces a spatial patchy spread of populations or continuous wave fronts. Since the analytical treatment of a three-species model is often prohibitive, we first analyze the interaction between two mutualist species without diffusion and without the presence of the predator. Some parameters are fixed in the bistable regime of the mutualistic species to further consider the influence of the third species. The remaining parameters are then selected to produce patchy patterns under different mortality rates. Finally, the equations of the final three-species system are numerically solved to test the influence of different initial conditions in the formation of patchy populations. It is confirmed that the velocity and the profile of a traveling front are independent on the initial conditions. Our approach opens the way to study more general biological situations.
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13
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Williams JL, Levine JM. Experimental evidence that density dependence strongly influences plant invasions through fragmented landscapes. Ecology 2018; 99:876-884. [PMID: 29352466 DOI: 10.1002/ecy.2156] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 11/25/2017] [Accepted: 12/13/2017] [Indexed: 11/07/2022]
Abstract
Populations of range expanding species encounter patches of both favorable and unfavorable habitat as they spread across landscapes. Theory shows that increasing patchiness slows the spread of populations modeled with continuously varying population density when dispersal is not influence by the environment or individual behavior. However, as is found in uniformly favorable landscapes, spread remains driven by fecundity and dispersal from low density individuals at the invasion front. In contrast, when modeled populations are composed of discrete individuals, patchiness causes populations to build up to high density before dispersing past unsuitable habitat, introducing an important influence of density dependence on spread velocity. To test the hypothesized interaction between habitat patchiness and density dependence, we simultaneously manipulated these factors in a greenhouse system of annual plants spreading through replicated experimental landscapes. We found that increasing the size of gaps and amplifying the strength of density dependence both slowed spread velocity, but contrary to predictions, the effect of amplified density dependence was similar across all landscape types. Our results demonstrate that the discrete nature of individuals in spreading populations has a strong influence on how both landscape patchiness and density dependence influence spread through demographic and dispersal stochasticity. Both finiteness and landscape structure should be critical components to theoretical predictions of future spread for range expanding native species or invasive species colonizing new habitat.
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Affiliation(s)
- Jennifer L Williams
- Department of Geography and Biodiversity Research Centre, University of British Columbia, 1984 West Mall, Vancouver, British Columbia, V6T 1Z2, Canada
| | - Jonathan M Levine
- Institute of Integrative Biology, ETH Zurich, Universitätstrasse 16, Zurich, 8092, Switzerland
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14
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Van Petegem K, Moerman F, Dahirel M, Fronhofer EA, Vandegehuchte ML, Van Leeuwen T, Wybouw N, Stoks R, Bonte D. Kin competition accelerates experimental range expansion in an arthropod herbivore. Ecol Lett 2017; 21:225-234. [DOI: 10.1111/ele.12887] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 08/13/2017] [Accepted: 10/27/2017] [Indexed: 12/18/2022]
Affiliation(s)
- Katrien Van Petegem
- Department of Biology Ghent University K.L. Ledeganckstraat 35 9000 Ghent Belgium
| | - Felix Moerman
- Department of Aquatic Ecology Eawag: Swiss Federal Institute of Aquatic Science and Technology Überlanderstrasse 133 CH‐8600 Dübendorf Switzerland
- Department of Evolutionary Biology and Environmental Studies University of Zürich Winterthurerstrasse 190 CH‐8057 Zürich Switzerland
| | - Maxime Dahirel
- Université de Rennes 1 UMR CNRS EcoBio 263 avenue du Général Leclerc 35042 Rennes France
| | - Emanuel A. Fronhofer
- Department of Aquatic Ecology Eawag: Swiss Federal Institute of Aquatic Science and Technology Überlanderstrasse 133 CH‐8600 Dübendorf Switzerland
- Department of Evolutionary Biology and Environmental Studies University of Zürich Winterthurerstrasse 190 CH‐8057 Zürich Switzerland
| | | | - Thomas Van Leeuwen
- Department of Crop Protection Ghent University Faculty of Bioscience Engineering B‐9000 Ghent Belgium
- Evolutionary Biology, IBED University of Amsterdam Science Park 904 – 1098 XH Amsterdam The Netherlands
| | - Nicky Wybouw
- Department of Crop Protection Ghent University Faculty of Bioscience Engineering B‐9000 Ghent Belgium
- Evolutionary Biology, IBED University of Amsterdam Science Park 904 – 1098 XH Amsterdam The Netherlands
| | - Robby Stoks
- Department of Biology University of Leuven Deberiotstraat 32 3000 Leuven Belgium
| | - Dries Bonte
- Department of Biology Ghent University K.L. Ledeganckstraat 35 9000 Ghent Belgium
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15
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Giometto A, Altermatt F, Rinaldo A. Demographic stochasticity and resource autocorrelation control biological invasions in heterogeneous landscapes. OIKOS 2017. [DOI: 10.1111/oik.04330] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Andrea Giometto
- Laboratory of Ecohydrology, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne; CH-1015 Lausanne Switzerland
- Dept of Molecular and Cellular Biology; Harvard Univ.; Cambridge MA USA
- Swiss Federal Inst. of Aquatic Science and Technology, Dept of Aquatic Ecology; Dübendorf Switzerland
| | - Florian Altermatt
- Swiss Federal Inst. of Aquatic Science and Technology, Dept of Aquatic Ecology; Dübendorf Switzerland
- Dept of Evolutionary Biology and Environmental Studies; Univ. of Zürich; Zürich Switzerland
| | - Andrea Rinaldo
- Laboratory of Ecohydrology, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne; CH-1015 Lausanne Switzerland
- Dipto di Ingegneria Civile; Edile ed Ambientale, Univ. di Padova; Padua Italy
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16
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Rapid trait evolution drives increased speed and variance in experimental range expansions. Nat Commun 2017; 8:14303. [PMID: 28128350 PMCID: PMC5290145 DOI: 10.1038/ncomms14303] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 12/12/2016] [Indexed: 01/11/2023] Open
Abstract
Range expansions are central to two ecological issues reshaping patterns of global biodiversity: biological invasions and climate change. Traditional theory considers range expansion as the outcome of the demographic processes of birth, death and dispersal, while ignoring the evolutionary implications of such processes. Recent research suggests evolution could also play a critical role in determining expansion speed but controlled experiments are lacking. Here we use flour beetles (Tribolium castaneum) to show experimentally that mean expansion speed and stochastic variation in speed are both increased by rapid evolution of traits at the expansion edge. We find that higher dispersal ability and lower intrinsic growth rates evolve at the expansion edge compared with spatially nonevolving controls. Furthermore, evolution of these traits is variable, leading to enhanced variance in speed among replicate population expansions. Our results demonstrate that evolutionary processes must be considered alongside demographic ones to better understand and predict range expansions. Spatial structure provides unique opportunities for evolution during range expansions. Here, the authors show experimentally using the red flour beetle, Tribolium castaneum, that dispersal and growth can evolve through spatial processes, increasing expansion speed and its variance.
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17
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Affiliation(s)
- Dries Bonte
- Ghent University; Dept. Biology; K.L. Ledeganckstraat 35 BE-9000 Ghent Belgium
| | - Maxime Dahirel
- Ghent University; Dept. Biology; K.L. Ledeganckstraat 35 BE-9000 Ghent Belgium
- Univ. of Rennes 1/ CNRS; UMR 6553 Ecobio Rennes France
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18
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Williams JL, Kendall BE, Levine JM. Rapid evolution accelerates plant population spread in fragmented experimental landscapes. Science 2016; 353:482-5. [PMID: 27471303 DOI: 10.1126/science.aaf6268] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 07/04/2016] [Indexed: 01/21/2023]
Abstract
Predicting the speed of biological invasions and native species migrations requires an understanding of the ecological and evolutionary dynamics of spreading populations. Theory predicts that evolution can accelerate species' spread velocity, but how landscape patchiness--an important control over traits under selection--influences this process is unknown. We manipulated the response to selection in populations of a model plant species spreading through replicated experimental landscapes of varying patchiness. After six generations of change, evolving populations spread 11% farther than nonevolving populations in continuously favorable landscapes and 200% farther in the most fragmented landscapes. The greater effect of evolution on spread in patchier landscapes was consistent with the evolution of dispersal and competitive ability. Accounting for evolutionary change may be critical when predicting the velocity of range expansions.
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Affiliation(s)
- Jennifer L Williams
- Department of Geography and Biodiversity Research Centre, University of British Columbia, 1984 West Mall, Vancouver, British Columbia V6T 1Z2, Canada.
| | - Bruce E Kendall
- Bren School of Environmental Science and Management, University of California, Santa Barbara, Santa Barbara, CA 93106-5131, USA
| | - Jonathan M Levine
- Institute of Integrative Biology, ETH Zurich, Universitätstrasse 16, 8092 Zurich, Switzerland
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