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ASSESSING THE IMPORTANCE OF HUMAN ACTIVITIES FOR THE ESTABLISHMENT OF THE INVASIVE POA ANNUA IN ATARCTICA

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dc.creatorCRISTIAN RODRIGO TORRES DÍAZ
dc.date2014
dc.date.accessioned2025-01-10T14:32:24Z
dc.date.available2025-01-10T14:32:24Z
dc.date.issued2014
dc.description.abstractBECAUSE OF ITS HARSH ENVIRONMENTAL CONDITIONS AND REMOTENESS, ANTARCTICA IS OFTEN CONSIDERED TO BE AT LOW RISK OF PLANT INVASION. HOWEVER, AN INCREASING NUMBER OF REPORTS HAVE SHOWN THE PRESENCE AND SPREAD OF NON-NATIVE PLANTS IN ANTARCTICA; IT IS THEREFORE IMPORTANT TO STUDY WHICH FACTORS CONTROL THE INVASION PROCESS IN THIS ECOSYSTEM. HERE, WE ASSESSED THE ROLE OF DIFFERENT HUMAN ACTIVITIES ON THE PRESENCE AND ABUNDANCE OF THE INVASIVE POA ANNUA. IN ADDITION, WE PERFORMED A RECIPROCAL TRANSPLANT EXPERIMENT IN THE FIELD, AND A MANIPULATIVE EXPERIMENT OF GERMINATION WITH P. ANNUA AND THE NATIVES COLOBANTHUS QUITENSIS AND DESCHAMPSIA ANTARCTICA, IN ORDER TO UNRAVEL THE EFFECTS OF PHYSICAL SOIL DISTURBANCE ON THE ESTABLISHMENT AND SURVIVAL OF P. ANNUA. WE FOUND A POSITIVE CORRELATION BETWEEN ABUNDANCE OF P. ANNUA AND LEVEL OF SOIL DISTURBANCE, AND THAT SURVIVAL OF P. ANNUA WAS 33% HIGHER IN SITES WITH DISTURBED SOIL THAN NON-DISTURBED. FINALLY, WE FOUND THAT DISTURBANCE CONDITIONS INCREASED GERMINATION FOR P. ANNUA, WHEREAS FOR NATIVE SPECIES GERMINATION IN EXPERIMENTALLY DISTURBED SOIL WAS EITHER UNCHANGED OR REDUCED COMPARED TO UNDISTURBED SOIL. OUR RESULTS INDICATE THAT HUMAN ACTIVITIES THAT MODIFY ABIOTIC SOIL CHARACTERISTICS COULD PLAY AN IMPORTANT ROLE IN THE ABUNDANCE OF THIS INVASIVE SPECIES. IF THE CURRENT PATTERNS OF HUMAN ACTIVITIES ARE MAINTAINED IN ANTARCTICA, THE ESTABLISHMENT SUCCESS AND SPREAD OF P. ANNUA COULD INCREASE, NEGATIVELY AFFECTING NATIVE FLORA.
dc.formatapplication/pdf
dc.identifier.doi10.3402/polar.v33.21425
dc.identifier.issn1751-8369
dc.identifier.issn0800-0395
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/7873
dc.languagespa
dc.publisherPOLAR RESEARCH
dc.relation.uri10.3402/polar.v33.21425
dc.rightsPUBLICADA
dc.subjectTOURISTS.
dc.subjectPOA ANNUA
dc.subjectHUMAN DISTURBANCE
dc.subjectDESCHAMPSIA ANTARCTICA
dc.subjectCOLOBANTHUS QUITENSIS
dc.subjectALIEN SPECIES
dc.titleASSESSING THE IMPORTANCE OF HUMAN ACTIVITIES FOR THE ESTABLISHMENT OF THE INVASIVE POA ANNUA IN ATARCTICA
dc.typeARTÍCULO
dspace.entity.typePublication
ubb.EstadoPUBLICADA
ubb.Otra ReparticionDEPARTAMENTO DE CIENCIAS BASICAS
ubb.SedeCHILLÁN
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