Negative Associations Can Reveal Interspecific Competition and Reversal of Competitive Hierarchies during Succession
| Autor: | Marcel Rejmánek, Jan Lepš, Marcel Rejmanek, Jan Leps |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
biology
Ecology media_common.quotation_subject food and beverages Interspecific competition biology.organism_classification food.food Competition (biology) Cirsium vulgare Plant ecology Arctostaphylos Cirsium food Arctostaphylos patula Ecology Evolution Behavior and Systematics Woody plant media_common |
| Zdroj: | Oikos. 76:161 |
| ISSN: | 0030-1299 |
| DOI: | 10.2307/3545758 |
| Popis: | Causes of interspecific associations are usually not discernible without properly designed experiments. Using relevant supplementary observational data, however, mechanisms of some associations can be explained. We found that the association between seedlings of Arctostaphylos patula (shrub) and two-year-old plants of Cirsium vulgare (introduced biennial herb) changes from neutral (2nd year), through negative (3rd year), to neutral (4th year), to negative again (5th and 6th year) during postlogging succession in the Sierra Nevada, California. Simultaneous analysis of the association between A. patula and one-year-old C. vulgare plants allowed us to interpret the observed pattern as successional reversal in the direction of competition. We explain the negative association between A. patula and mature C. vulgare plants in the 3rd year as a result of mortality of A. patula seedlings in the proximity of mature plants of C. vulgare (stronger competitor) and negative association in the 5th and 6th year as a result of mortality of C. vulgare in the proximity of A. patula (stronger competitor if more than four years old). Data on the year-to-year survival of the two species recorded in permanent plots concur with this explanation. |
| Databáze: | OpenAIRE |
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