ADDITIONAL EVIDENCE FOR ECOLOGICAL DIFFERENCES AMONG ISOMORPHIC REPRODUCTIVE PHASES OF IRIDAEA-LAMINARIOIDES (RHODOPHYTA, GIGARTINALES)

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dc.contributor.authorLUXORO, C
dc.contributor.authorSANTELICES, B
dc.date.accessioned2025-01-23T19:23:52Z
dc.date.available2025-01-23T19:23:52Z
dc.date.issued1989
dc.description.abstractGametophytes are more abundant than sporophytes in wave exposed rocky intertidal populations of Iridaea laminarioides Bory in Central Chile. In this study we experimentally tested the differential effects of selected ecological factors on karyologically different life history phases. In the field, gametophytes dominated at higher elevations and during summer; tetrasporophytes were most abundant low in the intertidal and during the fall. Laboratory responses correlated with these patterns. Gametophytes exhibited greater desiccation tolerance than tetrasporophytes. Optimum growth of gametophytes occurred at higher temperatures (20.degree. C) and longer photoperiods (16:8 h LD) than sporophytes (15.degree. C and 12:12 h LD). Grazing preferences changed with the developmental stage of the alga, but all herbivores tested had increased preference for diploid tissues as compared to haploid. Number of spores produced with respect to total plant surface, or total rocky surface, or settlement of spores and their germination rate did not show significant differences between phases but showed great variability in space and time. Spontaneous spore release, however, was always higher in cystocarpic than in tetrasporangial thalli. Such a combination of results suggests tht some real ecological differences exist between the two life history phases of I. laminarioides. Such ecological differences permit a prediction of vertical and temporal patterns of distribution for both phases. Horizontal Horizontal patterns of distribution cannot be explained because the several selection factors probably interact differently in various habitats.
dc.fuente.origenWOS
dc.identifier.eissn1529-8817
dc.identifier.issn0022-3646
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/99278
dc.identifier.wosidWOS:A1989AC84500002
dc.issue.numero2
dc.language.isoen
dc.pagina.final212
dc.pagina.inicio206
dc.revistaJournal of phycology
dc.rightsacceso restringido
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.titleADDITIONAL EVIDENCE FOR ECOLOGICAL DIFFERENCES AMONG ISOMORPHIC REPRODUCTIVE PHASES OF IRIDAEA-LAMINARIOIDES (RHODOPHYTA, GIGARTINALES)
dc.typeartículo
dc.volumen25
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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