Cargando…

Correlation of native and exotic species richness: a global meta‐analysis finds no invasion paradox across scales

Support for the “biotic resistance hypothesis,” that species‐rich communities are more successful at resisting invasion by exotic species than are species‐poor communities, has long been debated. It has been argued that native–exotic richness relationships (NERR) are negative at small spatial scales...

Descripción completa

Detalles Bibliográficos
Autores principales: Peng, Shijia, Kinlock, Nicole L., Gurevitch, Jessica, Peng, Shaolin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6849851/
https://www.ncbi.nlm.nih.gov/pubmed/30601574
http://dx.doi.org/10.1002/ecy.2552
_version_ 1783469293466288128
author Peng, Shijia
Kinlock, Nicole L.
Gurevitch, Jessica
Peng, Shaolin
author_facet Peng, Shijia
Kinlock, Nicole L.
Gurevitch, Jessica
Peng, Shaolin
author_sort Peng, Shijia
collection PubMed
description Support for the “biotic resistance hypothesis,” that species‐rich communities are more successful at resisting invasion by exotic species than are species‐poor communities, has long been debated. It has been argued that native–exotic richness relationships (NERR) are negative at small spatial scales and positive at large scales, but evidence for the role of spatial scale on NERR has been contradictory. However, no formal quantitative synthesis has previously examined whether NERR is scale‐dependent across multiple studies, and previous studies on NERR have not distinguished spatial grain and extent, which may drive very different ecological processes. We used a global systematic review and hierarchical mixed‐effects meta‐analysis to provide a comprehensive quantitative assessment of the patterns of NERR over a range of spatial grain sizes and spatial extents, based on 204 individual cases of observational (non‐experimental) NERRs from 101 publications. We show that NERR was indeed highly scale dependent across studies and increased with the log of grain size. However, mean NERR was not negative at any grain size, although there was high heterogeneity at small grain sizes. We found no clear patterns of NERR across different spatial extents, suggesting that extent plays a less important role in determining NERR than does grain, although there was a complex interaction between extent and grain size. Almost all studies on NERR were conducted in North America, western Europe, and a few other regions, with little information on tropical or Arctic regions. We did find that NERR increased northward in temperate regions and also varied with longitude. We discuss possible explanations for the patterns we found, and caution that our results do not show that invasive species are benign or have no negative consequences for biodiversity preservation. This study represents the first global quantitative analysis of scale‐based NERR, and casts doubt on the existence of an “invasion paradox” of negative NERR at small scales and positive correlations at large scales in non‐experimental studies.
format Online
Article
Text
id pubmed-6849851
institution National Center for Biotechnology Information
language English
publishDate 2019
publisher John Wiley and Sons Inc.
record_format MEDLINE/PubMed
spelling pubmed-68498512019-11-15 Correlation of native and exotic species richness: a global meta‐analysis finds no invasion paradox across scales Peng, Shijia Kinlock, Nicole L. Gurevitch, Jessica Peng, Shaolin Ecology Articles Support for the “biotic resistance hypothesis,” that species‐rich communities are more successful at resisting invasion by exotic species than are species‐poor communities, has long been debated. It has been argued that native–exotic richness relationships (NERR) are negative at small spatial scales and positive at large scales, but evidence for the role of spatial scale on NERR has been contradictory. However, no formal quantitative synthesis has previously examined whether NERR is scale‐dependent across multiple studies, and previous studies on NERR have not distinguished spatial grain and extent, which may drive very different ecological processes. We used a global systematic review and hierarchical mixed‐effects meta‐analysis to provide a comprehensive quantitative assessment of the patterns of NERR over a range of spatial grain sizes and spatial extents, based on 204 individual cases of observational (non‐experimental) NERRs from 101 publications. We show that NERR was indeed highly scale dependent across studies and increased with the log of grain size. However, mean NERR was not negative at any grain size, although there was high heterogeneity at small grain sizes. We found no clear patterns of NERR across different spatial extents, suggesting that extent plays a less important role in determining NERR than does grain, although there was a complex interaction between extent and grain size. Almost all studies on NERR were conducted in North America, western Europe, and a few other regions, with little information on tropical or Arctic regions. We did find that NERR increased northward in temperate regions and also varied with longitude. We discuss possible explanations for the patterns we found, and caution that our results do not show that invasive species are benign or have no negative consequences for biodiversity preservation. This study represents the first global quantitative analysis of scale‐based NERR, and casts doubt on the existence of an “invasion paradox” of negative NERR at small scales and positive correlations at large scales in non‐experimental studies. John Wiley and Sons Inc. 2019-01-02 2019-01 /pmc/articles/PMC6849851/ /pubmed/30601574 http://dx.doi.org/10.1002/ecy.2552 Text en © 2019 The Authors. Ecology published by Wiley Periodicals, Inc. on behalf of Ecological Society of America. This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
spellingShingle Articles
Peng, Shijia
Kinlock, Nicole L.
Gurevitch, Jessica
Peng, Shaolin
Correlation of native and exotic species richness: a global meta‐analysis finds no invasion paradox across scales
title Correlation of native and exotic species richness: a global meta‐analysis finds no invasion paradox across scales
title_full Correlation of native and exotic species richness: a global meta‐analysis finds no invasion paradox across scales
title_fullStr Correlation of native and exotic species richness: a global meta‐analysis finds no invasion paradox across scales
title_full_unstemmed Correlation of native and exotic species richness: a global meta‐analysis finds no invasion paradox across scales
title_short Correlation of native and exotic species richness: a global meta‐analysis finds no invasion paradox across scales
title_sort correlation of native and exotic species richness: a global meta‐analysis finds no invasion paradox across scales
topic Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6849851/
https://www.ncbi.nlm.nih.gov/pubmed/30601574
http://dx.doi.org/10.1002/ecy.2552
work_keys_str_mv AT pengshijia correlationofnativeandexoticspeciesrichnessaglobalmetaanalysisfindsnoinvasionparadoxacrossscales
AT kinlocknicolel correlationofnativeandexoticspeciesrichnessaglobalmetaanalysisfindsnoinvasionparadoxacrossscales
AT gurevitchjessica correlationofnativeandexoticspeciesrichnessaglobalmetaanalysisfindsnoinvasionparadoxacrossscales
AT pengshaolin correlationofnativeandexoticspeciesrichnessaglobalmetaanalysisfindsnoinvasionparadoxacrossscales