globalchange  > 全球变化的国际研究计划
DOI: 10.1162/artl_a_00272
WOS记录号: WOS:000460443500002
论文题名:
Examining Community Stability in the Face of Mass Extinction in Communities of Digital Organisms
作者: Luo, Tian-tong1; Heier, Lise; Khan, Zaki Ahmad1; Hasan, Faraz2; Reitan, Trond3; Yasseen, Abdool S., III4; Xie, Zi-xuan1; Zhu, Jian-long1; Yedid, Gabriel1
通讯作者: Yedid, Gabriel
刊名: ARTIFICIAL LIFE
ISSN: 1064-5462
EISSN: 1530-9185
出版年: 2019
卷: 24, 期:4, 页码:250-276
语种: 英语
英文关键词: Digital evolution ; mass extinction ; community stability ; coordinated stasis
WOS关键词: ALTERNATIVE STABLE STATES ; NEW-YORK-STATE ; LEVEL FLUCTUATIONS ; ESCHERICHIA-COLI ; CLIMATE-CHANGE ; FOSSIL RECORD ; RECOVERY ; END ; DIVERSITY ; EVOLUTION
WOS学科分类: Computer Science, Artificial Intelligence ; Computer Science, Theory & Methods
WOS研究方向: Computer Science
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.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/146619
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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

Recommended Citation:
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]. ARTIFICIAL LIFE,2019-01-01,24(4):250-276
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