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|Title: ||Interactive effects of genotype and food quality on consumer growth rate and elemental content|
|Authors: ||Prater, Clay|
Wagner, Nicole D.
Frost, Paul C.
G 9 E interaction
Phosphorus use efficiency
|Issue Date: ||2017|
|Publisher: ||© the Ecological Society of America. Published by Wiley|
|Citation: ||PRATER, C., WAGNER, N.D. and FROST, P.C., 2017. Interactive effects of genotype and food quality on consumer growth rate and elemental content. Ecology, 98(5), pp. 1399-1408.|
|Abstract: ||Consumer body stoichiometry is a key trait that links organismal physiology to population and ecosystem-level dynamics. However, as elemental composition has traditionally
been considered to be constrained within a species, the ecological and evolutionary factors
shaping consumer elemental composition have not been clearly resolved. To this end, we examined the causes and extent of variation in the body phosphorus (P) content and the expression of P-linked traits, mass specific growth rate (MSGR), and P use efficiency (PUE) of the keystone aquatic consumer Daphnia using lake surveys and common garden experiments. While daphnid body %P was relatively constrained in field assemblages sampled across an environmental P gradient, unique genotypes isolated from these lakes showed highly variable phenotypic responses when raised across dietary P gradients in the laboratory. Specifically, we observed substantial inter- and intra-specific variation and differences in daphnid responses
within and among our study lakes. While variation in Daphnia body %P was mostly due to plastic phenotypic changes, we documented considerable genetic differences in daphnid MSGR and PUE, and relationships between MSGR and body P content were highly variable among genotypes. Overall, our study found that consumer responses to food quality may differ considerably among genotypes and that relationships between organismal life-history traits and body stoichiometry may be strongly influenced by genetic and environmental variation in natural assemblages.|
|Description: ||This paper was published in the journal Ecology and the definitive published version is available at https://doi.org/10.1002/ecy.1795|
|Sponsor: ||This work was supported by a NSERC Discovery Grant to P. C. Frost and by OGS scholarships
to C. Prater and N. D. Wagner.|
|Publisher Link: ||https://doi.org/10.1002/ecy.1795|
|Appears in Collections:||Published Articles (Geography and Environment)|
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