Invasion of a rocky intertidal shore by the tunicate <i>Pyura praeputialis</i> in the Bay of Antofagasta, Chile

Simple item page
dc.contributor.authorCastilla, JC
dc.contributor.authorGuiñez, R
dc.contributor.authorCaro, AU
dc.contributor.authorOrtiz, V
dc.date.accessioned2025-01-21T01:07:53Z
dc.date.available2025-01-21T01:07:53Z
dc.date.issued2004
dc.description.abstractInvasion by marine nonindigenous species (NIS) is a spread phenomenon. The tunicate Pyura praeputialis shows pronounced disjoint geographical distribution: along thousands of kilometers in wave-swept headlands on the southeastern coast of Australia, from where it appears to have originated, and exclusively along 60-70 km inside the Bay of Antofagasta, Chile. mtDNA sequences suggested that the species invaded this rocky shore recently. We used field manipulations and juvenile A praeputialis transplant techniques to test hypotheses regarding the capacity of the tunicate to survive and grow at different sites and tidal heights inside and outside Antofagasta, and its competitive performance for primary space (inside the Bay) against the native mussel Perumytilus purpuratus. We conclude that survival and growth of A praeputialis showed no significant differences among sites inside and outside the Bay, and suggest that the restrictive distribution of the species in Chile is caused by a specific oceanographic retention mechanism and/or its brief larval dispersal. We demonstrated that, inside the Bay, P. praeputialis outcompetes Perumytilus from the Mid-Low intertidal, constraining Perumytilus to the Upper Mid-Intertidal, modifying the local pattern of intertidal zonation. We show that predation on P. praeputialis juveniles by starfish and snails constitutes a regulatory mechanism for the setting of its low intertidal limit. Major ecological impacts caused by NIS invasions to rocky shores by aggressive primary space users may result in negative aspects, but also may contribute to biodiversity enhancement. We call attention to the need for increment manipulations and testing of ecological hypotheses regarding marine NIS.
dc.fuente.origenWOS
dc.identifier.doi10.1073/pnas.0401921101
dc.identifier.issn0027-8424
dc.identifier.urihttps://doi.org/10.1073/pnas.0401921101
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96393
dc.identifier.wosidWOS:000222037000005
dc.issue.numero23
dc.language.isoen
dc.pagina.final8524
dc.pagina.inicio8517
dc.revistaProceedings of the national academy of sciences of the united states of america
dc.rightsacceso restringido
dc.subject.ods15 Life on Land
dc.subject.ods14 Life Below Water
dc.subject.ods13 Climate Action
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.subject.odspa14 Vida submarina
dc.subject.odspa13 Acción por el clima
dc.titleInvasion of a rocky intertidal shore by the tunicate <i>Pyura praeputialis</i> in the Bay of Antofagasta, Chile
dc.typeartículo
dc.volumen101
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas