期刊
ECOLOGY LETTERS
卷 24, 期 11, 页码 2339-2349出版社
WILEY
DOI: 10.1111/ele.13855
关键词
Daphnia; fatty acids; metabolic ecology; nutrition; secondary production; sterols; stoichiometry
类别
资金
- [CAP 20-25]
This study investigated the relationship between consumer metabolism and the effects of food chemical composition on biomass production. It was found that different dietary limitations can lead to an increase in resting metabolic rate, and there is a strong negative correlation between RMR and growth rate.
Consumer metabolism controls the energy uptake from the environment and its allocation to biomass production. In natural ecosystems, available energy in food often fails to predict biomass production which is also (co)limited by the relative availability of various dietary compounds. To date, the link between energy metabolism and the effects of food chemical composition on biomass production remains elusive. Here, we measured the resting metabolic rate (RMR) of Daphnia magna along ontogeny when undergoing various (non-energetic) nutritional constraints. All types of dietary (co)limitations (Fatty acids, Sterols, Phosphorus) induced an increase in mass-specific RMR up to 128% between highest and lowest quality diets. We highlight a strong negative correlation between RMR and growth rate indicating RMR as a promising predictor of consumer growth rate. We argue that quantifying the energetic cost imposed by food quality on individual RMR may constitute a common currency enabling the integration of nutritional and metabolic ecology.
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