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Biodiversity loss through speciation collapse: Mechanisms, warning signals, and possible rescue
Yangzhou Univ, Sch Math Sci, Yangzhou 225002, Jiangsu, Peoples R China;Umea Univ, Dept Math & Math Stat, SE-90187 Umea, Sweden.
Umea Univ, Dept Ecol & Environm Sci, SE-90187 Umea, Sweden.
Lund Univ, Dept Biol, Theoret Populat Ecol & Evolut Grp, S-22362 Lund, Sweden.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och genetik, Zooekologi. Uppsala universitet, Science for Life Laboratory, SciLifeLab.ORCID-id: 0000-0003-3221-4559
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2019 (engelsk)Inngår i: Evolution, ISSN 0014-3820, E-ISSN 1558-5646, Vol. 73, nr 8, s. 1504-1516Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Speciation is the process that generates biodiversity, but recent empirical findings show that it can also fail, leading to the collapse of two incipient species into one. Here, we elucidate the mechanisms behind speciation collapse using a stochastic individual-based model with explicit genetics. We investigate the impact of two types of environmental disturbance: deteriorated visual conditions, which reduce foraging ability and impede mate choice, and environmental homogenization, which restructures ecological niches. We find that: (1) Species pairs can collapse into a variety of forms including new species pairs, monomorphic or polymorphic generalists, or single specialists. Notably, polymorphic generalist forms may be a transient stage to a monomorphic population; (2) Environmental restoration enables species pairs to reemerge from single generalist forms, but not from single specialist forms; (3) Speciation collapse is up to four orders of magnitude faster than speciation, while the reemergence of species pairs can be as slow as de novo speciation; (4) Although speciation collapse can be predicted from either demographic, phenotypic, or genetic signals, observations of phenotypic changes allow the most general and robust warning signal of speciation collapse. We conclude that factors altering ecological niches can reduce biodiversity by reshaping the ecosystem's evolutionary attractors.

sted, utgiver, år, opplag, sider
WILEY , 2019. Vol. 73, nr 8, s. 1504-1516
Emneord [en]
Assortative mating, hybridization, speciation, species diversity, warning signals
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Identifikatorer
URN: urn:nbn:se:uu:diva-393743DOI: 10.1111/evo.13736ISI: 000482092600001PubMedID: 30980527OAI: oai:DiVA.org:uu-393743DiVA, id: diva2:1373115
Merknad

This article corresponds to VanWallendael A. 2019. Digest: Species collapse from disturbance occurs quickly, and recovery is slow. Evolution. https://doi.org/10.1111/evo.13794

Tilgjengelig fra: 2019-11-26 Laget: 2019-11-26 Sist oppdatert: 2019-11-26bibliografisk kontrollert

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