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Vasconcelos, Paula
Publications (7 of 7) Show all publications
Saltini, M., Vasconcelos, P. & Rüffler, C. (2023). Complex life cycles drive community assembly through immigration and adaptive diversification. Ecology Letters, 26(7), 1084-1094
Open this publication in new window or tab >>Complex life cycles drive community assembly through immigration and adaptive diversification
2023 (English)In: Ecology Letters, ISSN 1461-023X, E-ISSN 1461-0248, Vol. 26, no 7, p. 1084-1094Article in journal (Refereed) Published
Abstract [en]

Most animals undergo ontogenetic niche shifts during their life. Yet, standard ecological theory builds on models that ignore this complexity. Here, we study how complex life cycles, where juvenile and adult individuals each feed on different sets of resources, affect community richness. Two different modes of community assembly are considered: gradual adaptive evolution and immigration of new species with randomly selected phenotypes. We find that under gradual evolution complex life cycles can lead to both higher and lower species richness when compared to a model of species with simple life cycles that lack an ontogenetic niche shift. Thus, complex life cycles do not per se increase the scope for gradual adaptive diversification. However, complex life cycles can lead to significantly higher species richness when communities are assembled trough immigration, as immigrants can occupy isolated peaks of the dynamic fitness landscape that are not accessible via gradual evolution.

Place, publisher, year, edition, pages
John Wiley & Sons, 2023
Keywords
adaptive dynamics, coexistence, evolutionary branching, immigration, ontogenetic niche shift
National Category
Ecology Evolutionary Biology
Identifiers
urn:nbn:se:uu:diva-512256 (URN)10.1111/ele.14216 (DOI)000978577000001 ()37125448 (PubMedID)
Funder
Knut and Alice Wallenberg FoundationSwedish National Infrastructure for Computing (SNIC), SNIC 2021/22-483Swedish Research Council, 2018-05973
Available from: 2023-09-27 Created: 2023-09-27 Last updated: 2023-09-27Bibliographically approved
Vasconcelos, P. (2022). Adaptive evolution in multidimensional trait spaces. (Doctoral dissertation). Uppsala: Acta Universitatis Upsaliensis
Open this publication in new window or tab >>Adaptive evolution in multidimensional trait spaces
2022 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Negative frequency-dependent disruptive selection, which arises due to the interplay between organisms of a population and their environment, is an important element driving phenotypic diversification and even speciation. Such selection regime can result from frequency- and density-dependent interactions between the organisms and their environment, so that the fitness landscape itself changes as the population evolves. This can result in the population evolving towards a fitness minimum, at which point a population experiences disruptive selection. Under this regime, more extreme phenotypes are favored over intermediate ones, which in turn leads to phenotypic diversification. Branching points occur in many models in which fitness is derived from ecological scenarios that account for resource competition, predation, pathogens. This phenomenon is well understood in simple cases where interactions are mediated by a single quantitative trait in an unstructured life-cycle. This thesis, then, provides a theoretical exploration of the effects of complexity, as represented by the joint evolution of consumer traits involved in resource acquisition, on the potential for phenotypic diversification as instantiated in the process of evolutionary branching. We use the mathematical modeling framework of adaptive dynamics -- which incorporates ecological details into evolutionary processes -- to conduct our investigations, with additional help from computer simulations. We find that the effects of complexity on the potential for diversification are not straightforward, and that these depend on the specificities of the ecological scenario one is investigating. In Paper I we find that joint evolution of consumer traits involved in resource acquisition result in epistatic interactions which make it more likely that the consumer population will evolve to become a single specialist. In Paper II, we show that adding a plasticity modifier trait to the co-evolution of resource acquisition traits has mild effects in facilitating evolutionary branching, and that plasticity itself is driven to low levels by the aforementioned epistatic interactions between traits. In Paper III we find that the joint evolution of juvenile and adult specific feeding efficiencies in an organism with a complex life-cycle generally facilitates evolutionary branching because the life-stage with a higher population density is often under a regime of frequency-dependent disruptive selection. And in Paper IV we find that the joint evolution of juvenile and adult resource acquisition traits in an organism with a complex life-cycle does not itself increase the potential for evolutionary branching, but it can lead to significantly higher community richness when communities are assembled trough immigration.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2022. p. 44
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 2171
Keywords
adaptive dynamics, mutidimensional trait spaces, evolutionary dynamics, disruptive selection, resource competition, diversification
National Category
Evolutionary Biology
Identifiers
urn:nbn:se:uu:diva-481316 (URN)978-91-513-1563-8 (ISBN)
Public defence
2022-09-23, Friessalen, Evolutionsbiologiskt centrum, Norbyvägen 14, Uppsala, 13:15 (English)
Opponent
Supervisors
Available from: 2022-09-01 Created: 2022-08-08 Last updated: 2022-09-01
Vasconcelos, P. & Rüffler, C. (2020). How Does Joint Evolution of Consumer Traits Affect Resource Specialization?. American Naturalist, 195(2), 331-348
Open this publication in new window or tab >>How Does Joint Evolution of Consumer Traits Affect Resource Specialization?
2020 (English)In: American Naturalist, ISSN 0003-0147, E-ISSN 1537-5323, Vol. 195, no 2, p. 331-348Article in journal (Refereed) Published
Abstract [en]

Consumers regularly experience trade-offs in their ability to find, handle, and digest different resources. Evolutionary ecologists recognized the significance of this observation for the evolution and maintenance of biological diversity long ago and continue to elaborate on the conditions under which to expect one or several specialists, generalists, or combinations thereof. Existing theory based on a single evolving trait predicts that specialization requires strong trade-offs such that generalists perform relatively poorly, while weak trade-offs favor a single generalist. Here, we show that this simple dichotomy does not hold true under joint evolution of two or more foraging traits. In this case, the boundary between trade-offs resulting in resource specialists and resource generalists is shifted toward weaker trade-off curvatures. In particular, weak trade-offs can result in evolutionary branching, leading to the evolution of two coexisting resource specialists, while the evolution of a single resource generalist requires particularly weak trade-offs. These findings are explained by performance benefits due to epistatic trait interactions enjoyed by phenotypes that are specialized in more than one trait for the same resource.

Place, publisher, year, edition, pages
University of Chicago Press, 2020
National Category
Ecology
Identifiers
urn:nbn:se:uu:diva-481307 (URN)10.1086/706813 (DOI)000512604000017 ()32017627 (PubMedID)
Available from: 2022-08-08 Created: 2022-08-08 Last updated: 2024-05-16Bibliographically approved
Ahnesjö, I. & Vasconcelos, P. (2018). Recension: Cordelia Fine. Testosteron Rex: Myten om våra könade hjärnor [Review]. Tidskrift för Genusvetenskap, 39(4), 123-124
Open this publication in new window or tab >>Recension: Cordelia Fine. Testosteron Rex: Myten om våra könade hjärnor
2018 (Swedish)In: Tidskrift för Genusvetenskap, ISSN 1654-5443, E-ISSN 2001-1377, Vol. 39, no 4, p. 123-124Article, book review (Other (popular science, discussion, etc.)) Published
National Category
Natural Sciences
Identifiers
urn:nbn:se:uu:diva-397374 (URN)
Available from: 2019-11-19 Created: 2019-11-19 Last updated: 2019-12-19Bibliographically approved
Vasconcelos, P. (2017). Multidimensional Adaptive Dynamics and evolutionary diversification. Uppsala: Uppsala University
Open this publication in new window or tab >>Multidimensional Adaptive Dynamics and evolutionary diversification
2017 (English)Report (Other academic)
Place, publisher, year, edition, pages
Uppsala: Uppsala University, 2017. p. 30
Series
Introductory research essay / Department of Animal Ecology, Evolutionary Biology Centre, Uppsala University, ISSN 1404-4919 ; 107
National Category
Evolutionary Biology
Identifiers
urn:nbn:se:uu:diva-325459 (URN)
Available from: 2017-06-25 Created: 2017-06-25 Last updated: 2017-06-27Bibliographically approved
Saltini, M., Vasconcelos, P. & Rueffler, C.Complex life cycles drive community assembly through immigration and adaptive diversification.
Open this publication in new window or tab >>Complex life cycles drive community assembly through immigration and adaptive diversification
(English)Manuscript (preprint) (Other academic)
Keywords
adaptive dynamics, coexistence, evolutionary branching, immigration, ontogentic niche shift
National Category
Evolutionary Biology
Identifiers
urn:nbn:se:uu:diva-481312 (URN)
Funder
Knut and Alice Wallenberg FoundationSwedish National Infrastructure for Computing (SNIC), 2021/22-483Swedish Research Council, 2018-05973
Available from: 2022-08-08 Created: 2022-08-08 Last updated: 2022-08-31Bibliographically approved
Vasconcelos, P., Saltini, M. & Rueffler, C.Consequences of life-cycle complexity to the potential for evolutionary branching.
Open this publication in new window or tab >>Consequences of life-cycle complexity to the potential for evolutionary branching
(English)Manuscript (preprint) (Other academic)
National Category
Evolutionary Biology
Identifiers
urn:nbn:se:uu:diva-481314 (URN)
Available from: 2022-08-08 Created: 2022-08-08 Last updated: 2022-08-19Bibliographically approved
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