Genotype-specific relationships among phosphorus use, growth and abundance in Daphnia pulicaria
| Autor: | Kristina D. Baker, Punidan D. Jeyasingh, Ryan E. Sherman, Priyanka Roy Chowdhury, Lawrence J. Weider |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
zooplankton intraspecific competition Biology 010603 evolutionary biology 01 natural sciences Daphnia phenotypic plasticity Intraspecific competition Nutrient Animal science Genotype Ecological stoichiometry Growth rate phosphorus lcsh:Science 2. Zero hunger Phenotypic plasticity ecological stoichiometry Multidisciplinary Daphnia pulicaria 010604 marine biology & hydrobiology Biology (Whole Organism) biology.organism_classification growth rate lcsh:Q Research Article |
| Zdroj: | Royal Society Open Science, Vol 4, Iss 12 (2017) Royal Society Open Science |
| ISSN: | 2054-5703 |
| Popis: | The framework ecological stoichiometry uses elemental composition of species to make predictions about growth and competitive ability in defined elemental supply conditions. Although intraspecific differences in stoichiometry have been observed, we have yet to understand the mechanisms generating and maintaining such variation. We used variation in phosphorus (P) content within a Daphnia species to test the extent to which %P can explain variation in growth and competition. Further, we measured 33 P kinetics (acquisition, assimilation, incorporation and retention) to understand the extent to which such variables improved predictions. Genotypes showed significant variation in P content, 33 P kinetics and growth rate. P content alone was a poor predictor of growth rate and competitive ability. While most genotypes exhibited the typical growth penalty under P limitation, a few varied little in growth between P diets. These observations indicate that some genotypes can maintain growth under P-limited conditions by altering P use, suggesting that decomposing P content of an individual into physiological components of P kinetics will improve stoichiometric models. More generally, attention to the interplay between nutrient content and nutrient-use is required to make inferences regarding the success of genotypes in defined conditions of nutrient supply. |
| Databáze: | OpenAIRE |
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