Multi-extent analysis of the relationship between pteridophyte species richness and climate Bickford, S en_US Laffan, Shawn en_US 2021-11-25T13:09:38Z 2021-11-25T13:09:38Z 2006 en_US
dc.description.abstract Aim To determine the relationship between the distribution of climate, climatic heterogeneity and pteridophyte species richness gradients in Australia, using an approach that does not assume potential relationships are spatially invariant and allows for scale effects (extent of analysis) to be explicitly examined. Location Australia, extending from 10 degrees S to 43 degrees S and 112 degrees E to 153 degrees E. Method Species richness within 50 x 50 km grid cells was determined using point distribution data. Climatic surfaces representing the distribution and availability of water and energy at 1 km and 5 km cell resolutions were obtained. Climate at the 50 km resolution of analysis was represented by their mean and standard deviation in that area. Relationships were assessed using geographically weighted linear regression at a range of spatial bandwidths to investigate scale effects. Results The parameters and the predictive strength of all models varied across space at all extents of analysis. Overall, climatic variables representing water availability were more highly correlated to pteridophyte richness gradients in Australia than those representing energy. Their variance in cells further increased the strength of the relationships in topographically heterogeneous regions. Relationships with water were strong across all extents of analysis, particularly in the tropical and subtropical parts of the continent. Water availability explained less of the variation in richness at higher latitudes. Main conclusions This study brings into question the ability of aspatial and single-extent models, searching for a unified explanation of macro-scaled patterns in gradients of diversity, to adequately represent reality. It showed that, across Australia, there is a positive relationship between pteridophyte species richness and water availability but the strength and nature of the relationship varies spatially with scale in a highly complex manner. The spatial variance, or act en_US
dc.language English
dc.language.iso EN en_US
dc.rights CC BY-NC-ND 3.0 en_US
dc.rights.uri en_US
dc.source Legacy MARC en_US
dc.subject.other Climate en_US
dc.subject.other environmental heterogeneity en_US
dc.subject.other geographically local regression en_US
dc.subject.other macro-scale spatial analysis en_US
dc.subject.other pteridophytes en_US
dc.subject.other species richness en_US
dc.title Multi-extent analysis of the relationship between pteridophyte species richness and climate en_US
dc.type Journal Article en
dcterms.accessRights metadata only access
dspace.entity.type Publication en_US
unsw.identifier.doiPublisher en_US
unsw.relation.faculty Science
unsw.relation.ispartofissue 6 en_US
unsw.relation.ispartofjournal Global Ecology and Biogeography en_US
unsw.relation.ispartofpagefrompageto 588-601 en_US
unsw.relation.ispartofvolume 15 en_US
unsw.relation.originalPublicationAffiliation Bickford, S en_US
unsw.relation.originalPublicationAffiliation Laffan, Shawn, Biological, Earth & Environmental Sciences, Faculty of Science, UNSW en_US School of Biological, Earth & Environmental Sciences *
Resource type