{"refrec":{"BRefID":255055,"RR":"<b>Van Campenhout, J.; Vanreusel, A.; Van Belleghem, S.M.; Derycke, S.</b> (2015). Transcription, signaling receptor activity, oxidative phosphorylation, and fatty acid metabolism mediate the presence of closely related species in distinct intertidal and cold-seep habitats. <i>Genome Biology and Evolution 8(1)</i>: 51-69. <a href=\"http://dx.doi.org/10.1093/gbe/evv242\" target=\"_blank\">http://dx.doi.org/10.1093/gbe/evv242</a>","BEntID":247060,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Genome Biology and Evolution 8(1)</i>: 51-69. <a href=\"http://dx.doi.org/10.1093/gbe/evv242\" target=\"_blank\">http://dx.doi.org/10.1093/gbe/evv242</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Van Campenhout, J.; Vanreusel, A.; Van Belleghem, S.M.; Derycke, S.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Van Campenhout, J. <i>et al.</i>","Englishabstract":"Bathyal cold seeps are isolated extreme deep-sea environments characterized by low species diversity while biomass can be high. The Håkon Mosby mud volcano (Barents Sea, 1,280 m) is a rather stable chemosynthetic driven habitat characterized by prominent surface bacterial mats with high sulfide concentrations and low oxygen levels. Here, the nematode <i>Halomonhystera hermesi</i> thrives in high abundances (11,000 individuals 10 cm<sup>-2</sup>). <i>Halomonhystera hermesi</i> is a member of the intertidal <i>Halomonhystera disjuncta</i> species complex that includes five cryptic species (GD1-5). GD1-5’s common habitat is characterized by strong environmental fluctuations. Here, we compared the transcriptomes of <em>H. hermesi</em> and GD1, <i>H. hermesi</i>’s closest relative. Genes encoding proteins involved in oxidative phosphorylation are more strongly expressed in <i>H. hermesi</i> than in GD1, and many genes were only observed in <i>H. hermesi</i> while being completely absent in GD1. Both observations could in part be attributed to high sulfide concentrations and low oxygen levels. Additionally, fatty acid elongation was also prominent in <i>H. hermesi</i> confirming the importance of highly unsaturated fatty acids in this species. Significant higher amounts of transcription factors and genes involved in signaling receptor activity were observed in GD1 (many of which were completely absent in <em>H. hermesi</em>), allowing fast signaling and transcriptional reprogramming which can mediate survival in dynamic intertidal environments. GC content was approximately 8% higher in <i>H. hermesi</i> coding unigenes resulting in differential codon usage between both species and a higher proportion of amino acids with GC-rich  codons in <i>H. hermesi</i>. In general our results showed that most pathways were active in both environments and that only three genes are under natural selection. This indicates that also plasticity should be taken in consideration in the evolutionary history of <i>Halomonhystera</i> species. Such plasticity, as well as possible preadaptation to low oxygen and high sulfide levels might have played an important role in the establishment of a cold-seep <i>Halomonhystera</i> population.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Transcription, signaling receptor activity, oxidative phosphorylation, and fatty acid metabolism mediate the presence of closely related species in distinct intertidal and cold-seep habitats","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Transcriptomics; Adaptive variation; Phenotypic plasticity; Evolutionary biology; Cryptic species  ","OtherDescriptors":null,"Notes":null,"AnaPub":2015,"MonPub":null,"DateUpdate":"2018-05-17","DateCreate":"2016-04-13","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000370971600005","VABBcode":null,"OpenAcc":1,"DOI":"10.1093/gbe/evv242"},"refs":null,"anarec":{"AnaID":255055,"PubliDate":2015,"Pagination":"51-69","XtraPublOfAnaID":null,"ISBN":null,"Volume":"8","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":255059,"SerRR":"Genome Biology and Evolution. 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