Persistent asymmetrical priority effects in a California grassland restoration experiment
Autor: | Kristina M. Wolf, Chhaya M. Werner, Katharine L. Stuble, Kurt J. Vaughn, Truman P. Young |
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Rok vydání: | 2016 |
Předmět: |
0106 biological sciences
Nassella geography geography.geographical_feature_category Ecology 010604 marine biology & hydrobiology Community structure food and beverages Sowing Biodiversity Ecological succession Biology biology.organism_classification Grassland 010603 evolutionary biology 01 natural sciences California Guild Forb Stipa Environmental Restoration and Remediation |
Zdroj: | Ecological Applications. 26:1624-1632 |
ISSN: | 1051-0761 |
DOI: | 10.1890/15-1918.1 |
Popis: | The order of species arrival can dramatically alter the trajectory of community development. While there is experimental evidence that priority effects can be important drivers of community structure early on, the persistence and duration of these effects is unclear. Here we report on a community assembly experiment in which a mix of four native grasses and a mix of four native forbs were planted on their own, together, or with one-year priority over the other guild. We found positive effects of priority for both grasses and forbs in the initial years of the experiment. However, 6-8 yr after planting, the effectiveness of priority treatments were mixed. Some species became rare, persisting only in treatments in which they had been given priority; others continued to maintain high cover and exhibit a strong positive signal of priority effects; still others remained common but no longer showed a signature of the initial priority effects; and finally, some species became locally extinct across all experimental plots. Grass priority over forbs was strong and persistent, but not forb priority over grasses. Our results demonstrate that the long-term benefits of temporal priority can persist for at least 8 yr for some, but not all species, and these continued effects result in distinct community composition. Manipulating the trajectory of community assembly through priority in seeding has potential as a useful tool for restoration. |
Databáze: | OpenAIRE |
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