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Seasonal effects of food quality and temperature on body stoichiometry, biochemistry, and biomass production in Daphnia populations
Food quality and temperature can affect zooplankton production in lakes by altering organismal metabolism. However, the influence of these factors on consumer nutritional physiology and population biomass remains relatively understudied in natural populations. Here, we examined seasonal changes in b...
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| Format: | Default Article |
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2018
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| Online Access: | https://hdl.handle.net/2134/36450 |
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| _version_ | 1823268028247179264 |
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| author | Clay Prater Nicole D. Wagner Paul C. Frost |
| author_facet | Clay Prater Nicole D. Wagner Paul C. Frost |
| author_sort | Clay Prater (4219447) |
| collection | Figshare |
| description | Food quality and temperature can affect zooplankton production in lakes by altering organismal metabolism. However, the influence of these factors on consumer nutritional physiology and population biomass remains relatively understudied in natural populations. Here, we examined seasonal changes in body stoichiometry, biochemistry, and population biomass in two Daphnia species collected from two separate lakes differing in dietary phosphorus (P) supply. Food quality, measured as seston carbon:P (C:P) ratios, varied throughout the study in each lake, and water temperatures generally increased across the growing season. Daphnid elemental composition was correlated with food quality in both populations, but relationships between daphnid body stoichiometry and temperature were consistently stronger as Daphnia body C:P ratios and content of major biochemical pools declined simultaneously throughout the summer, which largely coincided with increased water temperatures. Warmer temperatures were associated with relaxed %P-RNA coupling as daphnid body RNA content declined and P content remained relatively high. These responses combined with temperature related decreases in Daphnia body %lipids and %C appeared to explain declines in daphnid body C:P ratios in both lakes over the growing season. Seasonal changes in population biomass were related to both food quality and water temperature in the lower nutrient lake. Biomass production under more eutrophic conditions however was unrelated to food quality and was instead associated with seasonal temperature changes in the higher nutrient lake. Overall, our study shows that seasonal changes in temperature and resource quality may differentially affect consumer stoichiometry and biomass production in lake ecosystems by altering consumer elemental metabolism. |
| format | Default Article |
| id | rr-article-9482315 |
| institution | Loughborough University |
| publishDate | 2018 |
| record_format | Figshare |
| spelling | rr-article-94823152018-01-01T00:00:00Z Seasonal effects of food quality and temperature on body stoichiometry, biochemistry, and biomass production in Daphnia populations Clay Prater (4219447) Nicole D. Wagner (3309819) Paul C. Frost (481086) Other earth sciences not elsewhere classified Ecological stoichiometry Metabolism Zooplankton Nutrient Earth Sciences not elsewhere classified Food quality and temperature can affect zooplankton production in lakes by altering organismal metabolism. However, the influence of these factors on consumer nutritional physiology and population biomass remains relatively understudied in natural populations. Here, we examined seasonal changes in body stoichiometry, biochemistry, and population biomass in two Daphnia species collected from two separate lakes differing in dietary phosphorus (P) supply. Food quality, measured as seston carbon:P (C:P) ratios, varied throughout the study in each lake, and water temperatures generally increased across the growing season. Daphnid elemental composition was correlated with food quality in both populations, but relationships between daphnid body stoichiometry and temperature were consistently stronger as Daphnia body C:P ratios and content of major biochemical pools declined simultaneously throughout the summer, which largely coincided with increased water temperatures. Warmer temperatures were associated with relaxed %P-RNA coupling as daphnid body RNA content declined and P content remained relatively high. These responses combined with temperature related decreases in Daphnia body %lipids and %C appeared to explain declines in daphnid body C:P ratios in both lakes over the growing season. Seasonal changes in population biomass were related to both food quality and water temperature in the lower nutrient lake. Biomass production under more eutrophic conditions however was unrelated to food quality and was instead associated with seasonal temperature changes in the higher nutrient lake. Overall, our study shows that seasonal changes in temperature and resource quality may differentially affect consumer stoichiometry and biomass production in lake ecosystems by altering consumer elemental metabolism. 2018-01-01T00:00:00Z Text Journal contribution 2134/36450 https://figshare.com/articles/journal_contribution/Seasonal_effects_of_food_quality_and_temperature_on_body_stoichiometry_biochemistry_and_biomass_production_in_Daphnia_populations/9482315 CC BY-NC-ND 4.0 |
| spellingShingle | Other earth sciences not elsewhere classified Ecological stoichiometry Metabolism Zooplankton Nutrient Earth Sciences not elsewhere classified Clay Prater Nicole D. Wagner Paul C. Frost Seasonal effects of food quality and temperature on body stoichiometry, biochemistry, and biomass production in Daphnia populations |
| title | Seasonal effects of food quality and temperature on body stoichiometry, biochemistry, and biomass production in Daphnia populations |
| title_full | Seasonal effects of food quality and temperature on body stoichiometry, biochemistry, and biomass production in Daphnia populations |
| title_fullStr | Seasonal effects of food quality and temperature on body stoichiometry, biochemistry, and biomass production in Daphnia populations |
| title_full_unstemmed | Seasonal effects of food quality and temperature on body stoichiometry, biochemistry, and biomass production in Daphnia populations |
| title_short | Seasonal effects of food quality and temperature on body stoichiometry, biochemistry, and biomass production in Daphnia populations |
| title_sort | seasonal effects of food quality and temperature on body stoichiometry, biochemistry, and biomass production in daphnia populations |
| topic | Other earth sciences not elsewhere classified Ecological stoichiometry Metabolism Zooplankton Nutrient Earth Sciences not elsewhere classified |
| url | https://hdl.handle.net/2134/36450 |