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Rare, common, alien and native species follow different rules in an understory plant community

Biological invasions are a leading threat to biodiversity globally. Increasingly, ecosystems experience multiple introductions, which can have significant effects on patterns of diversity. The way these communities assemble will depend partly on whether rare and common alien species respond to envir...

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Autores principales: Reeve, Sarah, Deane, David C., McGrannachan, Chris, Horner, Gillis, Hui, Cang, McGeoch, Melodie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8938312/
https://www.ncbi.nlm.nih.gov/pubmed/35356560
http://dx.doi.org/10.1002/ece3.8734
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author Reeve, Sarah
Deane, David C.
McGrannachan, Chris
Horner, Gillis
Hui, Cang
McGeoch, Melodie
author_facet Reeve, Sarah
Deane, David C.
McGrannachan, Chris
Horner, Gillis
Hui, Cang
McGeoch, Melodie
author_sort Reeve, Sarah
collection PubMed
description Biological invasions are a leading threat to biodiversity globally. Increasingly, ecosystems experience multiple introductions, which can have significant effects on patterns of diversity. The way these communities assemble will depend partly on whether rare and common alien species respond to environmental predictors in the same manner as rare and common native species, but this is not well understood. To examine this question across four national parks in south‐eastern Australia, we sampled the understory plant community of eucalypt‐dominated dry forest subject to multiple plant introductions. The drivers of diversity and turnover in alien and native species of contrasting frequency of occurrence (low, intermediate, and high) were each tested individually. We found alien species diversity and turnover were both strongly associated with abiotic conditions (e.g., soil pH), while distance had little influence because of the greater extent of occurrence and more homogeneous composition of common aliens. In contrast, native species diversity was not associated with abiotic conditions and their turnover was as strongly influenced by distance as by abiotic conditions. In both alien and native species, however, the most important predictors of turnover changed with frequency of occurrence. Although local coexistence appears to be facilitated by life history trade‐offs, species richness of aliens and natives was negatively correlated and native species might face greater competition in areas with more neutral soils (e.g., pH > ~5.5) where alien richness and relative frequency were both highest. We conclude that diversity and turnover in the generally more widespread alien species are mainly driven by species sorting along an environmental gradient associated with pH and nutrient availability, whereas turnover of native species is driven by more neutral processes associated with dispersal limitation. We show alien and native plant species respond to different environmental factors, as do rare and common species within each component.
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spelling pubmed-89383122022-03-29 Rare, common, alien and native species follow different rules in an understory plant community Reeve, Sarah Deane, David C. McGrannachan, Chris Horner, Gillis Hui, Cang McGeoch, Melodie Ecol Evol Research Articles Biological invasions are a leading threat to biodiversity globally. Increasingly, ecosystems experience multiple introductions, which can have significant effects on patterns of diversity. The way these communities assemble will depend partly on whether rare and common alien species respond to environmental predictors in the same manner as rare and common native species, but this is not well understood. To examine this question across four national parks in south‐eastern Australia, we sampled the understory plant community of eucalypt‐dominated dry forest subject to multiple plant introductions. The drivers of diversity and turnover in alien and native species of contrasting frequency of occurrence (low, intermediate, and high) were each tested individually. We found alien species diversity and turnover were both strongly associated with abiotic conditions (e.g., soil pH), while distance had little influence because of the greater extent of occurrence and more homogeneous composition of common aliens. In contrast, native species diversity was not associated with abiotic conditions and their turnover was as strongly influenced by distance as by abiotic conditions. In both alien and native species, however, the most important predictors of turnover changed with frequency of occurrence. Although local coexistence appears to be facilitated by life history trade‐offs, species richness of aliens and natives was negatively correlated and native species might face greater competition in areas with more neutral soils (e.g., pH > ~5.5) where alien richness and relative frequency were both highest. We conclude that diversity and turnover in the generally more widespread alien species are mainly driven by species sorting along an environmental gradient associated with pH and nutrient availability, whereas turnover of native species is driven by more neutral processes associated with dispersal limitation. We show alien and native plant species respond to different environmental factors, as do rare and common species within each component. John Wiley and Sons Inc. 2022-03-21 /pmc/articles/PMC8938312/ /pubmed/35356560 http://dx.doi.org/10.1002/ece3.8734 Text en © 2022 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Reeve, Sarah
Deane, David C.
McGrannachan, Chris
Horner, Gillis
Hui, Cang
McGeoch, Melodie
Rare, common, alien and native species follow different rules in an understory plant community
title Rare, common, alien and native species follow different rules in an understory plant community
title_full Rare, common, alien and native species follow different rules in an understory plant community
title_fullStr Rare, common, alien and native species follow different rules in an understory plant community
title_full_unstemmed Rare, common, alien and native species follow different rules in an understory plant community
title_short Rare, common, alien and native species follow different rules in an understory plant community
title_sort rare, common, alien and native species follow different rules in an understory plant community
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8938312/
https://www.ncbi.nlm.nih.gov/pubmed/35356560
http://dx.doi.org/10.1002/ece3.8734
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