Species richness and aggregation effects on the productivity of ruderal plant communities under drought perturbation
The effect of species richness and spatial aggregation on the stability of community productivity in response to drought perturbation was investigated with experimental plant communities. Communities comprising all single- and three-species combinations of the ruderal species, <em>Capsella bur...
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| Формат: | Journal article |
| Мова: | English |
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Oxford University Press
2008
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| _version_ | 1826300041620357120 |
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| author | Nakamura, N |
| author2 | Wilby, A |
| author_facet | Wilby, A Nakamura, N |
| author_sort | Nakamura, N |
| collection | OXFORD |
| description | The effect of species richness and spatial aggregation on the stability of community productivity in response to drought perturbation was investigated with experimental plant communities. Communities comprising all single- and three-species combinations of the ruderal species, <em>Capsella bursa-pastoris, Tripleurospermum inodorum, Poa annua,</em> and <em>Stellaria media,</em> were established in glasshouse. Habitat patchiness was manipulated by applying different seed-sowing patterns, either aggregated or random. After the establishment of communities, 8 days of drought treatment was imposed. Followed by a week of recovery with a regular watering regime, aboveground biomass was harvested. Community biomass was not affected by species richness or by aggregation, but was affected by perturbation. When multi-species community productivity was compared with monocultures in relative terms, species mixtures performed better in drought-induced conditions. This suggests that the positive effect of species richness may be enhanced under the perturbed condition. Sampling effects were evident under perturbation favouring the least productive species, <em>P. annua</em> and drought-tolerant <em>S. media</em>. All species except <em>C. bursa-pastoris</em> showed reduced productivity in species mixtures, but this may be mitigated under perturbed environments by species complementarity. Lack of clear responses to aggregation may suggest that the revealed diversity effect is not related to spatial structure. While competition predominates in communities in the resource-rich environment, drought perturbation enhance overall community productivity via a shift in relative significance of species interactions from competition to sampling and complementarity effects. |
| first_indexed | 2024-03-07T05:11:06Z |
| format | Journal article |
| id | oxford-uuid:db94f7e6-c896-4a5d-89d0-1670a4ab86bf |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:11:06Z |
| publishDate | 2008 |
| publisher | Oxford University Press |
| record_format | dspace |
| spelling | oxford-uuid:db94f7e6-c896-4a5d-89d0-1670a4ab86bf2022-03-27T09:11:38ZSpecies richness and aggregation effects on the productivity of ruderal plant communities under drought perturbationJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:db94f7e6-c896-4a5d-89d0-1670a4ab86bfPlant SciencesEvolution,ecology and systematicsEnvironmentEnglishOxford University Research Archive - ValetOxford University Press2008Nakamura, NWilby, AThe effect of species richness and spatial aggregation on the stability of community productivity in response to drought perturbation was investigated with experimental plant communities. Communities comprising all single- and three-species combinations of the ruderal species, <em>Capsella bursa-pastoris, Tripleurospermum inodorum, Poa annua,</em> and <em>Stellaria media,</em> were established in glasshouse. Habitat patchiness was manipulated by applying different seed-sowing patterns, either aggregated or random. After the establishment of communities, 8 days of drought treatment was imposed. Followed by a week of recovery with a regular watering regime, aboveground biomass was harvested. Community biomass was not affected by species richness or by aggregation, but was affected by perturbation. When multi-species community productivity was compared with monocultures in relative terms, species mixtures performed better in drought-induced conditions. This suggests that the positive effect of species richness may be enhanced under the perturbed condition. Sampling effects were evident under perturbation favouring the least productive species, <em>P. annua</em> and drought-tolerant <em>S. media</em>. All species except <em>C. bursa-pastoris</em> showed reduced productivity in species mixtures, but this may be mitigated under perturbed environments by species complementarity. Lack of clear responses to aggregation may suggest that the revealed diversity effect is not related to spatial structure. While competition predominates in communities in the resource-rich environment, drought perturbation enhance overall community productivity via a shift in relative significance of species interactions from competition to sampling and complementarity effects. |
| spellingShingle | Plant Sciences Evolution,ecology and systematics Environment Nakamura, N Species richness and aggregation effects on the productivity of ruderal plant communities under drought perturbation |
| title | Species richness and aggregation effects on the productivity of ruderal plant communities under drought perturbation |
| title_full | Species richness and aggregation effects on the productivity of ruderal plant communities under drought perturbation |
| title_fullStr | Species richness and aggregation effects on the productivity of ruderal plant communities under drought perturbation |
| title_full_unstemmed | Species richness and aggregation effects on the productivity of ruderal plant communities under drought perturbation |
| title_short | Species richness and aggregation effects on the productivity of ruderal plant communities under drought perturbation |
| title_sort | species richness and aggregation effects on the productivity of ruderal plant communities under drought perturbation |
| topic | Plant Sciences Evolution,ecology and systematics Environment |
| work_keys_str_mv | AT nakamuran speciesrichnessandaggregationeffectsontheproductivityofruderalplantcommunitiesunderdroughtperturbation |