Differential life history phase expression in two coexisting species of <i>Scytosiphon</i> (Phaeophyceae) in northern Chile

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dc.contributor.authorCamus, C
dc.contributor.authorMeynard, AP
dc.contributor.authorFaugeron, S
dc.contributor.authorKogame, K
dc.contributor.authorCorrea, JA
dc.date.accessioned2025-01-21T01:06:43Z
dc.date.available2025-01-21T01:06:43Z
dc.date.issued2005
dc.description.abstractThe identity of two phaeophycean taxa that monopolized the middle-lower rocky intertidal zone of a coastal area chronically exposed to copper mine wastes in northern Chile was unraveled. One of them was preliminarily identified as the gametophytic stage of Scytosiphon lomentaria (Lyngbye) Link. The other, a dark crust, resembled the alternate stage of some Scytosiphon species. Comparative analysis of morphology, life history, and DNA sequences strongly suggests that crusts corresponded to sporophytic S. tenellus Kogame and confirm that erect thalli belonged to S. lomentaria. A clear segregation of erect and crustose thalli was found using internal transcribed spacer region 1 and RUBISCO spacer sequences. Furthermore, whereas crusts always grouped with S. tenellus, erect thalli always grouped with S. lomentaria. Life history studies failed to connect the two entities. First, field-collected S. tenellus produced progeny that either recycled the crust, which reproduced by unilocular zoidangia, or developed into erect thalli. The latter, unlike typical gametophytic S. lomentaria, developed patchy sori of plurilocular zoidangia. Second, S. lomentaria displayed a direct-type life cycle, in which progeny from erect individuals only developed into erect thalli and produced only plurilocular zoidangia. This constitutes the first experimental study on Scytosiphon from the Pacific coast of South America and the first report of S. tenellus on this coast. It is also the first report of the crustose stage of Scytosiphon appearing as a perennial and dominant algal species in a temperate rocky intertidal system.
dc.fuente.origenWOS
dc.identifier.doi10.1111/j.1529-8817.2005.00121.x
dc.identifier.eissn1529-8817
dc.identifier.issn0022-3646
dc.identifier.urihttps://doi.org/10.1111/j.1529-8817.2005.00121.x
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96209
dc.identifier.wosidWOS:000232050000003
dc.issue.numero5
dc.language.isoen
dc.pagina.final941
dc.pagina.inicio931
dc.revistaJournal of phycology
dc.rightsacceso restringido
dc.subjectlife history
dc.subjectnorthern Chile
dc.subjectrocky intertidal
dc.subjectScytosiphon lomentaria
dc.subjectScytosiphon tenellus
dc.subject.ods14 Life Below Water
dc.subject.ods15 Life on Land
dc.subject.ods13 Climate Action
dc.subject.odspa14 Vida submarina
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.subject.odspa13 Acción por el clima
dc.titleDifferential life history phase expression in two coexisting species of <i>Scytosiphon</i> (Phaeophyceae) in northern Chile
dc.typeartículo
dc.volumen41
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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