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dc.contributor.author
Almirón, Martín G.
dc.contributor.author
Martínez Carretero, Eduardo E.
dc.contributor.author
Navas Kaluza, María Daniela
dc.contributor.author
Rothis, Luis Martin
dc.date.available
2021-02-08T12:57:21Z
dc.date.issued
2019-04
dc.identifier.citation
Almirón, Martín G.; Martínez Carretero, Eduardo E.; Navas Kaluza, María Daniela; Rothis, Luis Martin; Linking hydrological, geomorphological and biological properties in hyper-arid conditions: Distribution processes of a dominant clonal cactus by run-off; Wiley Blackwell Publishing, Inc; Austral Ecology; 44; 2; 4-2019; 209-215
dc.identifier.issn
1442-9985
dc.identifier.uri
http://hdl.handle.net/11336/125066
dc.description.abstract
The objective was to analyse the asexual spread of Tephrocactus aoracanthus (Cactaceae) related to run-off triggered by torrential summer rains in a hyper-arid desert. Through a manipulative essay, 30 joints (asexual dispersing stems) were placed in the mainstream of an alluvial fan and 30 joints out of the alluvial fan, without run-off influence (control). All joints were labelled, and their weight and diameter were measured. After each rain event with run-off, joints were surveyed identifying their spatial coordinates and environmental context. For this, two factors with two levels each one was selected: position respect to both microrelief (channels with concentrated run-off, or inter-channels as flat areas between channels, without run-off) and vegetation (entangled or not entangled in shrubs). Through a geographic information system, changes in slope angle and rugosity of terrain were analysed. Linear regressions were performed between the partial displacement of joints and their weight and diameter, grouped according to environmental context before each rainfall. None of the joints of the control treatment were moved, but all joints located in the mainstream were relocated. Three rainfall events triggered a mean displacement of 480.4 ± 210.0 m (SD); 103.0 ± 138.9 m (SD) and 33.2 ± 52.3 m (SD), respectively. The mean accumulated displacement of all joints during the experience was 577.12 ± 220.0 m (SD). As they moved, the joints passed through several different environmental contexts, increasing the proportion of joints entangled in vegetation and in inter-channel position. Until rooted, joints could be displaced by run-off in an anisotropic process, with an evident effect of slope angle and rugosity of terrain. On the other hand, no direct relationship was found between the displacement and the magnitude of the event, or both the size and the weight of joints. We assess the strategies related to the dispersal mechanism of clonal plants, related to conditions and enabling its agamic dispersal over long distances.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ANISOTROPIC DISTRIBUTION PROCESSES
dc.subject
CLONAL DISPERSAL
dc.subject
RUN-OFF WATER
dc.subject.classification
Ciencias de las Plantas, Botánica
dc.subject.classification
Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Linking hydrological, geomorphological and biological properties in hyper-arid conditions: Distribution processes of a dominant clonal cactus by run-off
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-11-19T21:49:31Z
dc.journal.volume
44
dc.journal.number
2
dc.journal.pagination
209-215
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Almirón, Martín G.. Universidad Nacional de San Juan; Argentina
dc.description.fil
Fil: Martínez Carretero, Eduardo E.. Universidad Nacional de San Juan; Argentina
dc.description.fil
Fil: Navas Kaluza, María Daniela. Universidad Nacional de San Juan; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Rothis, Luis Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
dc.journal.title
Austral Ecology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1111/aec.12665
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