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Quantifying the energetic cost of food quality constraints on resting metabolism to integrate nutritional and metabolic ecology
Author(s) -
Ruiz Thomas,
Koussoroplis ApostolosManuel,
Danger Michael,
Aguer JeanPierre,
MorelDesrosiers Nicole,
Bec Alexandre
Publication year - 2021
Publication title -
ecology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.852
H-Index - 265
eISSN - 1461-0248
pISSN - 1461-023X
DOI - 10.1111/ele.13855
Subject(s) - biomass (ecology) , basal metabolic rate , biology , daphnia magna , ecology , daphnia , food quality , ecosystem , food science , crustacean , chemistry , biochemistry , organic chemistry , toxicity
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.