Consequences of swamp forest fragmentation on assemblages of vascular epiphytes and climbing plants: Evaluation of the metacommunity structure

Pincheira-Ulbrich, Jimmy; Hernández, Cristian E.; Saldana, Alfredo

Consequences of swamp forest fragmentation on assemblages of vascular epiphytes and climbing plants: Evaluation of the metacommunity structure

dc.contributor.author	Pincheira-Ulbrich, Jimmy
dc.contributor.author	Hernández, Cristian E.
dc.contributor.author	Saldana, Alfredo
dc.date	2018
dc.date.accessioned	2019-10-16T16:00:21Z
dc.date.available	2019-10-16T16:00:21Z
dc.date.issued	2019-10-16
dc.description.abstract	Aim Habitat reduction in fragmented landscapes provides an opportunity to study the biogeographic patterns that drive changes in diversity in poorly studied metacommunities. In this study, colonization-extinction dynamics were indirectly evaluated through the analysis of the species-area relationship and the nestedness of vascular epiphytes and climbing plants in 30 swamp forest fragments. Location Coast of the Araucania Region in Chile. Taxon Vascular epiphytes (16 species, mainly Pteridophytes) and climbing plants (15 species). Methods We used the database in Pincheira-Ulbrich et al. (New Zealand Journal of Botany, 54, 2016, 458), where 904 trees were sampled and a total abundance of 41,097 fern fronds and 3,098 climbing stems were reported. For the species-area relationship, a simple linear regression model (SLR) and two models that consider the spatial autocorrelation of species richness among fragments, generalized least squares (GLS) and simultaneous autoregressive model (SAR), were compared. For the species nestedness, the nestedness measure based on overlap and decreasing fills (NODF) and weighted nestedness metric based on overlap and decreasing fill (WNODF) indexes were used on presence-absence and abundance matrices, respectively. These matrices were sorted by area size and distance from the largest fragment and then contrasted with the probability distribution of a randomized null model based on 10,000 simulations. Results The results showed that the area size had a significantly positive effect on epiphyte species richness, while spatial autocorrelation played a fundamental role in explaining the richness of climbing plants. Both metacommunities had a general nestedness structure in terms of species incidence, which was determined first by area size and secondly by isolation. Main conclusions Our results indicate that local colonization processes determined by species' dispersal capacities could be the predominant mechanism for the spatial configuration of climbing plant species composition. On the other hand, selective extinction determined by patch size could characterize the spatial structure of epiphyte species' composition	es_ES
dc.format	PDF	es_ES
dc.identifier.citation	Ecology and Evolution, Vol.8, N°23, 11785-11798, 2018
dc.identifier.doi	10.1002/ece3.4635	es_ES
dc.identifier.uri	http://repositoriodigital.uct.cl/handle/10925/2021
dc.language.iso	en	es_ES
dc.source	Ecology and Evolution	es_ES
dc.subject	Biodiversidad	es_ES
dc.subject	Biogeografía	es_ES
dc.subject	Ecología del paisaje	es_ES
dc.subject	Helechos	es_ES
dc.title	Consequences of swamp forest fragmentation on assemblages of vascular epiphytes and climbing plants: Evaluation of the metacommunity structure	es_ES
dc.type	Artículo de Revista	es_ES
uct.catalogador	pop	es_ES
uct.comunidad	Recursos Naturales	es_ES
uct.indizacion	ISI - Science Citation Index	es_ES