2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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6/06/2017 | 9:30 AM - 9:45 AM | Phosphorus availability in the source population influences response to dietary phosphorus quantity in a New Zealand freshwater snail | 301A

Phosphorus availability in the source population influences response to dietary phosphorus quantity in a New Zealand freshwater snail

Variation among populations in resource availability can shape ecological and evolutionary processes. We address whether variation among populations in availability of dietary phosphorus (P) is linked to heterogeneity in growth of Potamopyrgus antipodarum, a New Zealand snail, on a P-limited diet. In juvenile snails from lakes that vary in P availability, we quantified growth rate and alkaline phosphatase (AP) expression on high vs. low-P diets. We found that P. antipodarum exhibits wide intraspecific variation in response to P limitation and some of this variation is associated with P availability in the lake of origin. In particular, snails from lakes with relatively low P availability featured the most dramatic increases in growth on the high-P diet. By contrast, although AP expression varied substantially among lineages, overall AP expression was not affected by diet treatment and was not associated with the relationship between C:P in the lake of origin and sensitivity to P limitation. Together, our results demonstrate connections between variation in dietary resource availability among populations and organismal response to P limitation as well as evidence for intraspecific variation of AP expression in animals.

C03 Invertebrates
S19 Elements and energy as fundamental currencies of nature: using ecological stoichiometry as a tool to advance the sustainability of freshwater ecosystems
C28 Land-Water Interfaces & C29 Life Histories

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Presenters/Authors

Maurine Neiman (), University of Iowa, krist@uwyo.edu;