Spatial scale and species identity influence the indigenous–alien diversity relationship in springtails
Although theory underlying the invasion paradox, or the change in the relationship between the richness of alien and indigenous species from negative to positive with increasing spatial scale, is well developed and much empirical work on the subject has been undertaken, most of the latter has concer...
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Ecological Society of America
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ftunstellenbosch:oai:scholar.sun.ac.za:10019.1/120005 2023-05-15T17:09:59+02:00 Spatial scale and species identity influence the indigenous–alien diversity relationship in springtails Terauds, A. Chown, S.L. Berstrom, D.M. 2011-11-24T06:34:25Z 286041 bytes application/pdf http://hdl.handle.net/10019.1/120005 en eng Ecological Society of America Terauds, A.; Chown, S.L. and Bergstrom, D.M. (2011) Spatial scale and species identity influence the indigenous–alien diversity relationship in springtails. Ecology, 92(7), 1436–1447 http://hdl.handle.net/10019.1/120005 biological invasions Collembola density environmental favorability invasion paradox Macquarie Island Australia species identity species richness subantarctic JournalArticles 2011 ftunstellenbosch 2021-08-31T00:09:15Z Although theory underlying the invasion paradox, or the change in the relationship between the richness of alien and indigenous species from negative to positive with increasing spatial scale, is well developed and much empirical work on the subject has been undertaken, most of the latter has concerned plants and to a lesser extent marine invertebrates. Here we therefore examine the extent to which the relationships between indigenous and alien species richness change from the local metacommunity to the interaction neighborhood scales, and the influences of abundance, species identity, and environmental favorability thereon, in springtails, a significant component of the soil fauna. Using a suite of modeling techniques, including generalized least squares and geographically weighted regressions to account for spatial autocorrelation or nonstationarity of the data, we show that the abundance and species richness of both indigenous and alien species at the metacommunity scale respond strongly to declining environmental favorability, represented here by altitude. Consequently, alien and indigenous diversity covary positively at this scale. By contrast, relationships are more complex at the interaction neighborhood scale, with the relationship among alien species richness and/or density and the density of indigenous species varying between habitats, being negative in some, but positive in others. Additional analyses demonstrated a strong influence of species identity, with negative relationships identified at the interaction neighborhood scale involving alien hypogastrurid springtails, a group known from elsewhere to have negative effects on indigenous species in areas where they have been introduced. By contrast, diversity relationships were positive with the other alien species. These results are consistent with both theory and previous empirical findings for other taxa, that interactions among indigenous and alien species change substantially with spatial scale and that environmental favorability may play a key role in explaining the larger scale patterns. However, they also suggest that the interactions may be affected by the identity of the species concerned, especially at the interaction neighborhood scale. Centre of Excellence for Invasion Biology Other/Unknown Material Macquarie Island Stellenbosch University: SUNScholar Research Repository |
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Open Polar |
collection |
Stellenbosch University: SUNScholar Research Repository |
op_collection_id |
ftunstellenbosch |
language |
English |
topic |
biological invasions Collembola density environmental favorability invasion paradox Macquarie Island Australia species identity species richness subantarctic |
spellingShingle |
biological invasions Collembola density environmental favorability invasion paradox Macquarie Island Australia species identity species richness subantarctic Terauds, A. Chown, S.L. Berstrom, D.M. Spatial scale and species identity influence the indigenous–alien diversity relationship in springtails |
topic_facet |
biological invasions Collembola density environmental favorability invasion paradox Macquarie Island Australia species identity species richness subantarctic |
description |
Although theory underlying the invasion paradox, or the change in the relationship between the richness of alien and indigenous species from negative to positive with increasing spatial scale, is well developed and much empirical work on the subject has been undertaken, most of the latter has concerned plants and to a lesser extent marine invertebrates. Here we therefore examine the extent to which the relationships between indigenous and alien species richness change from the local metacommunity to the interaction neighborhood scales, and the influences of abundance, species identity, and environmental favorability thereon, in springtails, a significant component of the soil fauna. Using a suite of modeling techniques, including generalized least squares and geographically weighted regressions to account for spatial autocorrelation or nonstationarity of the data, we show that the abundance and species richness of both indigenous and alien species at the metacommunity scale respond strongly to declining environmental favorability, represented here by altitude. Consequently, alien and indigenous diversity covary positively at this scale. By contrast, relationships are more complex at the interaction neighborhood scale, with the relationship among alien species richness and/or density and the density of indigenous species varying between habitats, being negative in some, but positive in others. Additional analyses demonstrated a strong influence of species identity, with negative relationships identified at the interaction neighborhood scale involving alien hypogastrurid springtails, a group known from elsewhere to have negative effects on indigenous species in areas where they have been introduced. By contrast, diversity relationships were positive with the other alien species. These results are consistent with both theory and previous empirical findings for other taxa, that interactions among indigenous and alien species change substantially with spatial scale and that environmental favorability may play a key role in explaining the larger scale patterns. However, they also suggest that the interactions may be affected by the identity of the species concerned, especially at the interaction neighborhood scale. Centre of Excellence for Invasion Biology |
format |
Other/Unknown Material |
author |
Terauds, A. Chown, S.L. Berstrom, D.M. |
author_facet |
Terauds, A. Chown, S.L. Berstrom, D.M. |
author_sort |
Terauds, A. |
title |
Spatial scale and species identity influence the indigenous–alien diversity relationship in springtails |
title_short |
Spatial scale and species identity influence the indigenous–alien diversity relationship in springtails |
title_full |
Spatial scale and species identity influence the indigenous–alien diversity relationship in springtails |
title_fullStr |
Spatial scale and species identity influence the indigenous–alien diversity relationship in springtails |
title_full_unstemmed |
Spatial scale and species identity influence the indigenous–alien diversity relationship in springtails |
title_sort |
spatial scale and species identity influence the indigenous–alien diversity relationship in springtails |
publisher |
Ecological Society of America |
publishDate |
2011 |
url |
http://hdl.handle.net/10019.1/120005 |
genre |
Macquarie Island |
genre_facet |
Macquarie Island |
op_relation |
Terauds, A.; Chown, S.L. and Bergstrom, D.M. (2011) Spatial scale and species identity influence the indigenous–alien diversity relationship in springtails. Ecology, 92(7), 1436–1447 http://hdl.handle.net/10019.1/120005 |
_version_ |
1766066372936204288 |