Change search
ReferencesLink to record
Permanent link

Direct link
Increased diversification rates follow shifts to bisexuality in liverworts
Stockholm University, Faculty of Science, Department of Ecology, Environment and Plant Sciences. Stockholm University, Science for Life Laboratory (SciLifeLab). University of Liège, Belgium.
Show others and affiliations
Number of Authors: 10
2016 (English)In: New Phytologist, ISSN 0028-646X, E-ISSN 1469-8137, Vol. 210, no 3, 1121-1129 p.Article in journal (Refereed) Published
Abstract [en]

Shifts in sexual systems are one of the key drivers of species diversification. In contrast to angiosperms, unisexuality prevails in bryophytes. Here, we test the hypotheses that bisexuality evolved from an ancestral unisexual condition and is a key innovation in liverworts. We investigate whether shifts in sexual systems influence diversification using hidden state speciation and extinction analysis (HiSSE). This new method compares the effects of the variable of interest to the best-fitting latent variable, yielding robust and conservative tests. We find that the transitions in sexual systems are significantly biased toward unisexuality, even though bisexuality is coupled with increased diversification. Sexual systems are strongly conserved deep within the liverwort tree but become much more labile toward the present. Bisexuality appears to be a key innovation in liverworts. Its effects on diversification are presumably mediated by the interplay of high fertilization rates, massive spore production and long-distance dispersal, which may separately or together have facilitated liverwort speciation, suppressed their extinction, or both. Importantly, shifts in liverwort sexual systems have the opposite effect when compared to angiosperms, leading to contrasting diversification patterns between the two groups. The high prevalence of unisexuality among liverworts suggests, however, a strong selection for sexual dimorphism.

Place, publisher, year, edition, pages
2016. Vol. 210, no 3, 1121-1129 p.
Keyword [en]
Baker's law, dispersal, diversification, hidden state speciation and extinction analysis (HiSSE), liverworts, sexual systems
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:su:diva-130640DOI: 10.1111/nph.13835ISI: 000374286700033OAI: oai:DiVA.org:su-130640DiVA: diva2:932929
Available from: 2016-06-02 Created: 2016-05-27 Last updated: 2016-06-02Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Laenen, Benjamin
By organisation
Department of Ecology, Environment and Plant SciencesScience for Life Laboratory (SciLifeLab)
In the same journal
New Phytologist
Biological Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 4 hits
ReferencesLink to record
Permanent link

Direct link