論文

査読有り 筆頭著者 責任著者
2020年7月8日

Evolution of division of labour in mutualistic symbiosis

Proceedings of the Royal Society B: Biological Sciences
  • Yu Uchiumi
  • ,
  • Akira Sasaki

287
1930
開始ページ
20200669
終了ページ
20200669
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1098/rspb.2020.0669
出版者・発行元
The Royal Society

Mutualistic symbiosis can be regarded as interspecific division of labour, which can improve the productivity of metabolites and services but deteriorate the ability to live without partners. Interestingly, even in environmentally acquired symbiosis, involved species often rely exclusively on the partners despite the lethal risk of missing partners. To examine this paradoxical evolution, we explored the coevolutionary dynamics in symbiotic species for the amount of investment in producing their essential metabolites, which symbiotic species can share. Our study has shown that, even if obtaining partners is difficult, ‘perfect division of labour’ (PDL) can be maintained evolutionarily, where each species perfectly specializes in producing one of the essential metabolites so that every member entirely depends on the others for survival, i.e. in exchange for losing the ability of living alone. Moreover, the coevolutionary dynamics shows multistability with other states including a state without any specialization. It can cause evolutionary hysteresis: once PDL has been achieved evolutionarily when obtaining partners was relatively easy, it is not reverted even if obtaining partners becomes difficult later. Our study suggests that obligate mutualism with a high degree of mutual specialization can evolve and be maintained easier than previously thought.

リンク情報
DOI
https://doi.org/10.1098/rspb.2020.0669
URL
https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2020.0669
URL
https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2020.0669
ID情報
  • DOI : 10.1098/rspb.2020.0669
  • ISSN : 0962-8452
  • eISSN : 1471-2954

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