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DOI10.1162/artl_a_00272
Examining Community Stability in the Face of Mass Extinction in Communities of Digital Organisms
Luo, Tian-tong1; Heier, Lise; Khan, Zaki Ahmad1; Hasan, Faraz2; Reitan, Trond3; Yasseen, Abdool S., III4; Xie, Zi-xuan1; Zhu, Jian-long1; Yedid, Gabriel1
发表日期2019
ISSN1064-5462
EISSN1530-9185
卷号24期号:4页码:250-276
英文摘要

Digital evolution is a computer-based instantiation of Darwinian evolution in which short self-replicating computer programs compete, mutate, and evolve. It is an excellent platform for addressing topics in long-term evolution and paleobiology, such as mass extinction and recovery, with experimental evolutionary approaches. We evolved model communities with ecological interdependence among community members, which were subjected to two principal types of mass extinction: a pulse extinction that killed randomly, and a selective press extinction involving an alteration of the abiotic environment to which the communities had to adapt. These treatments were applied at two different strengths, along with unperturbed control experiments. We examined how stability in the digital communities was affected from the perspectives of division of labor, relative shift in rank abundance, and genealogical connectedness of the community's component ecotypes. Mass extinction that was due to a Strong Press treatment was most effective in producing reshaped communities that differed from the pre-treatment ones in all of the measured perspectives; weaker versions of the treatments did not generally produce significant departures from a Control treatment; and results for the Strong Pulse treatment generally fell between those extremes. The Strong Pulse treatment differed from others in that it produced a slight but detectable shift towards more generalized communities. Compared to Press treatments, Pulse treatments also showed a greater contribution from re-evolved ecological doppelgangers rather than new ecotypes. However, relatively few Control communities showed stability in any of these metrics over the whole course of the experiment, and most did not represent stable states (by some measure of stability) that were disrupted by the extinction treatments. Our results have interesting, broad qualitative parallels with findings from the paleontological record, and show the potential of digital evolution studies to illuminate many aspects of mass extinction and recovery by addressing them in a truly experimental manner.


WOS研究方向Computer Science
来源期刊ARTIFICIAL LIFE
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/102668
作者单位1.Nanjing Agr Univ, Dept Zool, Coll Life Sci, Nanjing, Jiangsu, Peoples R China;
2.Aligarh Muslim Univ, Dept Comp Sci & Engn, Aligarh, Uttar Pradesh, India;
3.Univ Oslo, Ctr Ecol & Evolutionary Synth, Dept Biol, Oslo, Norway;
4.Univ Toronto, Dalla Lana Sch Publ Hlth, Toronto, ON, Canada
推荐引用方式
GB/T 7714
Luo, Tian-tong,Heier, Lise,Khan, Zaki Ahmad,et al. Examining Community Stability in the Face of Mass Extinction in Communities of Digital Organisms[J],2019,24(4):250-276.
APA Luo, Tian-tong.,Heier, Lise.,Khan, Zaki Ahmad.,Hasan, Faraz.,Reitan, Trond.,...&Yedid, Gabriel.(2019).Examining Community Stability in the Face of Mass Extinction in Communities of Digital Organisms.ARTIFICIAL LIFE,24(4),250-276.
MLA Luo, Tian-tong,et al."Examining Community Stability in the Face of Mass Extinction in Communities of Digital Organisms".ARTIFICIAL LIFE 24.4(2019):250-276.
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