Biogeographical determinants of pteridophytes and spermatophytes on oceanic archipelagos

Using the data from six oceanic archipelagos, we investigated the species richness patterns on islands for all natives, archipelagic endemics and single-island endemics of pteridophytes and spermatophytes. We tested the hypothesis that the descriptive ability of biogeographical factors for species i...

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Authors: Chiarucci, Alessandro, Bacaro, Giovanni, Triantis, Kostas A., Fernández-Palacios, José María
Format: article
Status:Published version
Publication Date:2011
Country:España
Institution:Universidad de La Laguna (ULL)
Repository:RIULL. Repositorio Institucional de la Universidad de La Laguna
OAI Identifier:oai:riull.ull.es:915/17694
Online Access:http://riull.ull.es/xmlui/handle/915/17694
Access Level:Embargoed access
Keyword:Azores
Canaries
Cape Verde
flora
Gal´apagos
Hawaii
island biogeography
Marquesas
predictive models
species richness
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spelling Biogeographical determinants of pteridophytes and spermatophytes on oceanic archipelagosChiarucci, AlessandroBacaro, GiovanniTriantis, Kostas A.Fernández-Palacios, José MaríaAzoresCanariesCape VerdefloraGal´apagosHawaiiisland biogeographyMarquesaspredictive modelsspecies richnessUsing the data from six oceanic archipelagos, we investigated the species richness patterns on islands for all natives, archipelagic endemics and single-island endemics of pteridophytes and spermatophytes. We tested the hypothesis that the descriptive ability of biogeographical factors for species is reduced as we move from native species, to archipelagic endemics and to single island endemics, because of the increasing importance of island ‘idiosyncrasies’ (i.e. unique features of each island shaping its biota, such as catastrophic volcanic eruptions, random colonization events, mega-landslides) in controlling the species richness of endemic species. This hypothesis was addressed using two approaches: (1) the island species–area relationships (ISARs), and (2) a multiple regression approach with variable selection based on permutation, to test the combined effects of island area with other biogeographical factors. Area was an effective predictor of species richness for all native species (R2 = 0.568 and R2 = 0.624 for pteridophytes and spermatophytes respectively), but its predictive capacity decreased for archipelagic endemics (R2 = 0.261 and R2 = 0.531) and single-island endemics (R2 = 0.084 and R2 = 0.438). The reduction of R2 from all native species, to archipelagic endemics and to single-island endemics was attributed to the increasing effects of the ‘idiosyncrasies’ of each island. The predictive capacity of multiple regression models increased with respect to ISARs, ranging from 27.3% (for single-island endemic pteridophytes) to 83.3% (all native pteridophytes), and included three to five predictors. Island area remained the most important variable for spermatophytes but was less important for pteridophytes. For pteridophytes, elevation was the most important predictor for native species, while isolation-related variables were the most important predictors for archipelagic endemics and single-island endemics. Our results support the hypothesis that as we move from native, to archipelagic endemic and to single-island endemic species the predictive ability of models is reduced, indicating an increased effect of the ‘idiosyncratic’ character of islands.201920192011info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://riull.ull.es/xmlui/handle/915/17694reponame:RIULL. Repositorio Institucional de la Universidad de La Lagunainstname:Universidad de La Laguna (ULL)InglésSystematics and Biodiversity;9(3), 2011.Attribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/embargoedAccessoai:riull.ull.es:915/176942026-06-22T13:13:57Z
dc.title.none.fl_str_mv Biogeographical determinants of pteridophytes and spermatophytes on oceanic archipelagos
title Biogeographical determinants of pteridophytes and spermatophytes on oceanic archipelagos
spellingShingle Biogeographical determinants of pteridophytes and spermatophytes on oceanic archipelagos
Chiarucci, Alessandro
Azores
Canaries
Cape Verde
flora
Gal´apagos
Hawaii
island biogeography
Marquesas
predictive models
species richness
title_short Biogeographical determinants of pteridophytes and spermatophytes on oceanic archipelagos
title_full Biogeographical determinants of pteridophytes and spermatophytes on oceanic archipelagos
title_fullStr Biogeographical determinants of pteridophytes and spermatophytes on oceanic archipelagos
title_full_unstemmed Biogeographical determinants of pteridophytes and spermatophytes on oceanic archipelagos
title_sort Biogeographical determinants of pteridophytes and spermatophytes on oceanic archipelagos
dc.creator.none.fl_str_mv Chiarucci, Alessandro
Bacaro, Giovanni
Triantis, Kostas A.
Fernández-Palacios, José María
author Chiarucci, Alessandro
author_facet Chiarucci, Alessandro
Bacaro, Giovanni
Triantis, Kostas A.
Fernández-Palacios, José María
author_role author
author2 Bacaro, Giovanni
Triantis, Kostas A.
Fernández-Palacios, José María
author2_role author
author
author
dc.subject.none.fl_str_mv Azores
Canaries
Cape Verde
flora
Gal´apagos
Hawaii
island biogeography
Marquesas
predictive models
species richness
topic Azores
Canaries
Cape Verde
flora
Gal´apagos
Hawaii
island biogeography
Marquesas
predictive models
species richness
description Using the data from six oceanic archipelagos, we investigated the species richness patterns on islands for all natives, archipelagic endemics and single-island endemics of pteridophytes and spermatophytes. We tested the hypothesis that the descriptive ability of biogeographical factors for species is reduced as we move from native species, to archipelagic endemics and to single island endemics, because of the increasing importance of island ‘idiosyncrasies’ (i.e. unique features of each island shaping its biota, such as catastrophic volcanic eruptions, random colonization events, mega-landslides) in controlling the species richness of endemic species. This hypothesis was addressed using two approaches: (1) the island species–area relationships (ISARs), and (2) a multiple regression approach with variable selection based on permutation, to test the combined effects of island area with other biogeographical factors. Area was an effective predictor of species richness for all native species (R2 = 0.568 and R2 = 0.624 for pteridophytes and spermatophytes respectively), but its predictive capacity decreased for archipelagic endemics (R2 = 0.261 and R2 = 0.531) and single-island endemics (R2 = 0.084 and R2 = 0.438). The reduction of R2 from all native species, to archipelagic endemics and to single-island endemics was attributed to the increasing effects of the ‘idiosyncrasies’ of each island. The predictive capacity of multiple regression models increased with respect to ISARs, ranging from 27.3% (for single-island endemic pteridophytes) to 83.3% (all native pteridophytes), and included three to five predictors. Island area remained the most important variable for spermatophytes but was less important for pteridophytes. For pteridophytes, elevation was the most important predictor for native species, while isolation-related variables were the most important predictors for archipelagic endemics and single-island endemics. Our results support the hypothesis that as we move from native, to archipelagic endemic and to single-island endemic species the predictive ability of models is reduced, indicating an increased effect of the ‘idiosyncratic’ character of islands.
publishDate 2011
dc.date.none.fl_str_mv 2011
2019
2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://riull.ull.es/xmlui/handle/915/17694
url http://riull.ull.es/xmlui/handle/915/17694
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Systematics and Biodiversity;9(3), 2011.
dc.rights.none.fl_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/embargoedAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv embargoedAccess
dc.source.none.fl_str_mv reponame:RIULL. Repositorio Institucional de la Universidad de La Laguna
instname:Universidad de La Laguna (ULL)
instname_str Universidad de La Laguna (ULL)
reponame_str RIULL. Repositorio Institucional de la Universidad de La Laguna
collection RIULL. Repositorio Institucional de la Universidad de La Laguna
repository.name.fl_str_mv
repository.mail.fl_str_mv
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