Regional effects on competition–productivity relationship: a set of field experiments in two distant regions
We studied the effect of productivity on competition intensity and the relationship between competition intensity and community species richness, using a removal experiment with the perennial plant Solidago virgaurea . The experiment was conducted in 16 different communities from two geographically...
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crwiley:10.1111/j.0030-1299.2006.13378.x 2024-06-02T08:12:06+00:00 Regional effects on competition–productivity relationship: a set of field experiments in two distant regions Sammul, Marek Oksanen, Lauri Mägi, Merike 2006 http://dx.doi.org/10.1111/j.0030-1299.2006.13378.x http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.0030-1299.2006.13378.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.0030-1299.2006.13378.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Oikos volume 112, issue 1, page 138-148 ISSN 0030-1299 1600-0706 journal-article 2006 crwiley https://doi.org/10.1111/j.0030-1299.2006.13378.x 2024-05-03T11:16:23Z We studied the effect of productivity on competition intensity and the relationship between competition intensity and community species richness, using a removal experiment with the perennial plant Solidago virgaurea . The experiment was conducted in 16 different communities from two geographically distant areas (western Estonia and northern Norway). The results were compared with the results of previous experiments with Anthoxanthum odoratum from the same areas. Removal of neighbors had a positive effect on the biomass of both Solidago and Anthoxanthum , and this response was stronger in communities with higher productivity. Thus, the corrected index of relative competition intensity, CRCI, increased with increasing community productivity. Species richness was negatively correlated with CRCI in Estonia but not in Norway and not in the case of the pooled material. The results suggest that competitive exclusion operates at least in these communities which species pool is large. Our results indicate that the relationship between competition intensity and productivity is non‐linear. In our data, competition prevails in communities where living plant biomass exceeds 200 g m −2 , whereas in less productive communities, competition remains undetected and direct plant–plant relationships might at times be even mutualistic. Moreover, we found that the relationship between competition intensity and productivity is strongly dependent on regional differences and is intimately connected to a concordant variation in the intensity of grazing. The least productive communities both in Estonia and in Norway are characterized by intensive grazing, which reduces importance of competition. Hence, the contrasting results corroborates the predictions of the hypothesis of exploitation ecosystems, predicting that trophic dynamics account for the relationship between competition intensity and primary productivity. Article in Journal/Newspaper Northern Norway Wiley Online Library Norway Oikos 112 1 138 148 |
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Wiley Online Library |
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English |
description |
We studied the effect of productivity on competition intensity and the relationship between competition intensity and community species richness, using a removal experiment with the perennial plant Solidago virgaurea . The experiment was conducted in 16 different communities from two geographically distant areas (western Estonia and northern Norway). The results were compared with the results of previous experiments with Anthoxanthum odoratum from the same areas. Removal of neighbors had a positive effect on the biomass of both Solidago and Anthoxanthum , and this response was stronger in communities with higher productivity. Thus, the corrected index of relative competition intensity, CRCI, increased with increasing community productivity. Species richness was negatively correlated with CRCI in Estonia but not in Norway and not in the case of the pooled material. The results suggest that competitive exclusion operates at least in these communities which species pool is large. Our results indicate that the relationship between competition intensity and productivity is non‐linear. In our data, competition prevails in communities where living plant biomass exceeds 200 g m −2 , whereas in less productive communities, competition remains undetected and direct plant–plant relationships might at times be even mutualistic. Moreover, we found that the relationship between competition intensity and productivity is strongly dependent on regional differences and is intimately connected to a concordant variation in the intensity of grazing. The least productive communities both in Estonia and in Norway are characterized by intensive grazing, which reduces importance of competition. Hence, the contrasting results corroborates the predictions of the hypothesis of exploitation ecosystems, predicting that trophic dynamics account for the relationship between competition intensity and primary productivity. |
format |
Article in Journal/Newspaper |
author |
Sammul, Marek Oksanen, Lauri Mägi, Merike |
spellingShingle |
Sammul, Marek Oksanen, Lauri Mägi, Merike Regional effects on competition–productivity relationship: a set of field experiments in two distant regions |
author_facet |
Sammul, Marek Oksanen, Lauri Mägi, Merike |
author_sort |
Sammul, Marek |
title |
Regional effects on competition–productivity relationship: a set of field experiments in two distant regions |
title_short |
Regional effects on competition–productivity relationship: a set of field experiments in two distant regions |
title_full |
Regional effects on competition–productivity relationship: a set of field experiments in two distant regions |
title_fullStr |
Regional effects on competition–productivity relationship: a set of field experiments in two distant regions |
title_full_unstemmed |
Regional effects on competition–productivity relationship: a set of field experiments in two distant regions |
title_sort |
regional effects on competition–productivity relationship: a set of field experiments in two distant regions |
publisher |
Wiley |
publishDate |
2006 |
url |
http://dx.doi.org/10.1111/j.0030-1299.2006.13378.x http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.0030-1299.2006.13378.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.0030-1299.2006.13378.x |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Northern Norway |
genre_facet |
Northern Norway |
op_source |
Oikos volume 112, issue 1, page 138-148 ISSN 0030-1299 1600-0706 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.0030-1299.2006.13378.x |
container_title |
Oikos |
container_volume |
112 |
container_issue |
1 |
container_start_page |
138 |
op_container_end_page |
148 |
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1800758437263441920 |