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Trait means or variance—What determines plant species' local and regional occurrence in fragmented dry grasslands?
One of the few laws in ecology is that communities consist of few common and many rare taxa. Functional traits may help to identify the underlying mechanisms of this community pattern, since they correlate with different niche dimensions. However, comprehensive studies are missing that investigate t...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8019038/ https://www.ncbi.nlm.nih.gov/pubmed/33841789 http://dx.doi.org/10.1002/ece3.7287 |
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author | Bergholz, Kolja Kober, Klarissa Jeltsch, Florian Schmidt, Kristina Weiss, Lina |
author_facet | Bergholz, Kolja Kober, Klarissa Jeltsch, Florian Schmidt, Kristina Weiss, Lina |
author_sort | Bergholz, Kolja |
collection | PubMed |
description | One of the few laws in ecology is that communities consist of few common and many rare taxa. Functional traits may help to identify the underlying mechanisms of this community pattern, since they correlate with different niche dimensions. However, comprehensive studies are missing that investigate the effects of species mean traits (niche position) and intraspecific trait variability (ITV, niche width) on species abundance. In this study, we investigated fragmented dry grasslands to reveal trait‐occurrence relationships in plants at local and regional scales. We predicted that (a) at the local scale, species occurrence is highest for species with intermediate traits, (b) at the regional scale, habitat specialists have a lower species occurrence than generalists, and thus, traits associated with stress‐tolerance have a negative effect on species occurrence, and (c) ITV increases species occurrence irrespective of the scale. We measured three plant functional traits (SLA = specific leaf area, LDMC = leaf dry matter content, plant height) at 21 local dry grassland communities (10 m × 10 m) and analyzed the effect of these traits and their variation on species occurrence. At the local scale, mean LDMC had a positive effect on species occurrence, indicating that stress‐tolerant species are the most abundant rather than species with intermediate traits (hypothesis 1). We found limited support for lower specialist occurrence at the regional scale (hypothesis 2). Further, ITV of LDMC and plant height had a positive effect on local occurrence supporting hypothesis 3. In contrast, at the regional scale, plants with a higher ITV of plant height were less frequent. We found no evidence that the consideration of phylogenetic relationships in our analyses influenced our findings. In conclusion, both species mean traits (in particular LDMC) and ITV were differently related to species occurrence with respect to spatial scale. Therefore, our study underlines the strong scale‐dependency of trait‐abundance relationships. |
format | Online Article Text |
id | pubmed-8019038 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-80190382021-04-08 Trait means or variance—What determines plant species' local and regional occurrence in fragmented dry grasslands? Bergholz, Kolja Kober, Klarissa Jeltsch, Florian Schmidt, Kristina Weiss, Lina Ecol Evol Original Research One of the few laws in ecology is that communities consist of few common and many rare taxa. Functional traits may help to identify the underlying mechanisms of this community pattern, since they correlate with different niche dimensions. However, comprehensive studies are missing that investigate the effects of species mean traits (niche position) and intraspecific trait variability (ITV, niche width) on species abundance. In this study, we investigated fragmented dry grasslands to reveal trait‐occurrence relationships in plants at local and regional scales. We predicted that (a) at the local scale, species occurrence is highest for species with intermediate traits, (b) at the regional scale, habitat specialists have a lower species occurrence than generalists, and thus, traits associated with stress‐tolerance have a negative effect on species occurrence, and (c) ITV increases species occurrence irrespective of the scale. We measured three plant functional traits (SLA = specific leaf area, LDMC = leaf dry matter content, plant height) at 21 local dry grassland communities (10 m × 10 m) and analyzed the effect of these traits and their variation on species occurrence. At the local scale, mean LDMC had a positive effect on species occurrence, indicating that stress‐tolerant species are the most abundant rather than species with intermediate traits (hypothesis 1). We found limited support for lower specialist occurrence at the regional scale (hypothesis 2). Further, ITV of LDMC and plant height had a positive effect on local occurrence supporting hypothesis 3. In contrast, at the regional scale, plants with a higher ITV of plant height were less frequent. We found no evidence that the consideration of phylogenetic relationships in our analyses influenced our findings. In conclusion, both species mean traits (in particular LDMC) and ITV were differently related to species occurrence with respect to spatial scale. Therefore, our study underlines the strong scale‐dependency of trait‐abundance relationships. John Wiley and Sons Inc. 2021-03-10 /pmc/articles/PMC8019038/ /pubmed/33841789 http://dx.doi.org/10.1002/ece3.7287 Text en © 2021 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Research Bergholz, Kolja Kober, Klarissa Jeltsch, Florian Schmidt, Kristina Weiss, Lina Trait means or variance—What determines plant species' local and regional occurrence in fragmented dry grasslands? |
title | Trait means or variance—What determines plant species' local and regional occurrence in fragmented dry grasslands? |
title_full | Trait means or variance—What determines plant species' local and regional occurrence in fragmented dry grasslands? |
title_fullStr | Trait means or variance—What determines plant species' local and regional occurrence in fragmented dry grasslands? |
title_full_unstemmed | Trait means or variance—What determines plant species' local and regional occurrence in fragmented dry grasslands? |
title_short | Trait means or variance—What determines plant species' local and regional occurrence in fragmented dry grasslands? |
title_sort | trait means or variance—what determines plant species' local and regional occurrence in fragmented dry grasslands? |
topic | Original Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8019038/ https://www.ncbi.nlm.nih.gov/pubmed/33841789 http://dx.doi.org/10.1002/ece3.7287 |
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