caa a22 4500 606193456 CHVBK 20210128100909.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s10682-015-9760-0 doi (NATIONALLICENCE)springer-10.1007/s10682-015-9760-0 Genotypic differences in phosphorus use physiology in producers ( Chlamydomonas reinhardtii ) and consumers ( Daphnia pulex ) interact to alter primary and secondary production [Elektronische Daten] [Patrick Lind, Punidan Jeyasingh] By considering the relative abundance of elements in trophic interactions, ecological stoichiometry makes predictions about key ecological processes such as biomass production and consumer-driven nutrient recycling. Theoretical and empirical work has focused on interspecific variation in elemental composition, and stoichiometric imbalances between resources and consumers in determining productivity, particularly at the base of foodwebs. Recent work has found considerable intraspecific variation in elemental composition. We know little about the ecological relevance of such variation, and whether predictions of stoichiometric theory hold at the intraspecific level. Here, we used two genotypes of a primary producer Chlamydomonas reinhardtii, and two genotypes of a primary consumer Daphnia pulex, which are already known to vary considerably in their phosphorus (P) use physiology, under conditions of P abundance and limitation, to explore whether such intraspecific differences alter primary as well as secondary production. Specifically, we tested whether there are intraspecific differences in the carbon: phosphorus (C:P) stoichiometry of Chlamydomonas genotypes, whether such differences affect growth and abundance of the two Daphnia genotypes, and whether the two Daphnia genotypes had distinct effects on primary production and growth of the two Chlamydomonas genotypes. We found significant differences in C:P stoichiometry between the two Chlamydomonas genotypes in both P supply conditions. Such intraspecific differences altered the growth of Daphnia genotypes, and affected the outcome of genotypic competition. Finally, Daphnia genotype affected primary production, and interacted with P supply to distinctly affect the growth of the two Chlamydomonas genotypes. Together, our results highlight the potential ecological relevance of intraspecific differences in nutrient use physiology and elemental composition, and the utility of ecological stoichiometry in understanding such consequences. Springer International Publishing Switzerland, 2015 Consumer-driven nutrient cycling nationallicence Ecological stoichiometry nationallicence Eco-evolutionary dynamics nationallicence Genetic variation nationallicence Genotype by environment interactions nationallicence Psr1 nationallicence Lind Patrick Department of Integrative Biology, Oklahoma State University, 501 Life Sciences West, 74078, Stillwater, OK, USA aut Jeyasingh Punidan Department of Integrative Biology, Oklahoma State University, 501 Life Sciences West, 74078, Stillwater, OK, USA aut Evolutionary Ecology Springer International Publishing 29/4(2015-07-01), 551-563 0269-7653 29:4<551 2015 29 10682 https://doi.org/10.1007/s10682-015-9760-0 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10682-015-9760-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lind Patrick Department of Integrative Biology, Oklahoma State University, 501 Life Sciences West, 74078, Stillwater, OK, USA aut NATIONALLICENCE 700 1- Jeyasingh Punidan Department of Integrative Biology, Oklahoma State University, 501 Life Sciences West, 74078, Stillwater, OK, USA aut NATIONALLICENCE 773 0- Evolutionary Ecology Springer International Publishing 29/4(2015-07-01), 551-563 0269-7653 29:4<551 2015 29 10682