dc.date.accessioned | 2018-08-14T15:23:43Z | |
dc.date.accessioned | 2018-10-31T18:46:41Z | |
dc.date.available | 2018-08-14T15:23:43Z | |
dc.date.available | 2018-10-31T18:46:41Z | |
dc.date.created | 2018-08-14T15:23:43Z | |
dc.date.issued | 2014 | |
dc.identifier | http://hdl.handle.net/10533/219358 | |
dc.identifier | 1140009 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1773554 | |
dc.description.abstract | Climatic conditions at higher altitudes pose a barrier to exotic species establishment due to an
increase of the severity of climatic conditions, reducing plant survival and/or reproduction.
However, processes that occur at lower spatial scale such as facilitation can expand the altitudinal
range beyond that expected by climatic conditions alone. We tested this idea in Taraxacum
officinale, a successful invasive plant that occur in Mediterranean ecosystems: California
(Western USA) and central Chile among other regions based on the fact that facilitation effects
on T. officinale (and other exotic plants) at higher altitudes have been widely documented for
cushion plants. We used Ecological Distribution Models (EDMs) comparing a global niche
model (a proxy of the fundamental niche), constructed with the totality of occurrences observed
for this species worldwide with the regional niche model (a proxy of the realized niche,
constructed with the occurrences observed in the invaded ranges): California and central Chile.
This comparison allowed to infer the invasive stage at each invaded range. We also compared
altitudinal distribution models predicted from global and regional niche model at each invaded
region. Our result indicated that the regional niche model predicted areas not predicted by the
global niche model, areas that coincide with the co-occurrences between T. offcinale and cushion
plants. Moreover, regional niche models predicted an elevation range beyond that predicted by
the global niche model. While plant facilitation process occurs locally, we propose that this
process can scale-up to expand altitudinal distribution of invasive species. We emphasize the
importance of predicting biological invasions not only from the perspective of climatic niche, but
also including the effect of biological interactions. | |
dc.language | eng | |
dc.relation | 13 | |
dc.relation | info:eu-repo/grantAgreement//1140009 | |
dc.relation | info:eu-repo/semantics/dataset/hdl.handle.net/10533/93486 | |
dc.relation | MEDECOS | |
dc.relation | instname: Conicyt | |
dc.relation | reponame: Repositorio Digital RI2.0 | |
dc.rights | http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ | |
dc.rights | info:eu-repo/semantics/openAccess | |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Chile | |
dc.title | Distribution of the invasive plant Taraxacum officinale at mediterranean altitudinal gradients: using niche models to infer whether cushion plants expand altitudinal range of this species | |
dc.type | Actas de congresos | |