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U‐shaped response Unifies views on temperature dependency of stoichiometric requirements
Author(s) -
Ruiz Thomas,
Koussoroplis ApostolosManuel,
Danger Michael,
Aguer JeanPierre,
MorelDesrosiers Nicole,
Bec Alexandre
Publication year - 2020
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.13493
Subject(s) - nutrient , daphnia , global change , climate change , environmental science , phosphorus , ecological stoichiometry , global warming , ecology , production (economics) , nutrient cycle , carbon fibers , atmospheric sciences , carbon cycle , biology , ecosystem , chemistry , physics , materials science , economics , microeconomics , organic chemistry , crustacean , composite number , composite material
Temperature and nutrient availability, which are major drivers of consumer performance, are dramatically affected by global change. To date, there is no consensus on whether warming increases or decreases consumer needs for dietary carbon (C) relatively to phosphorus (P), thus hindering predictions of secondary production responses to global change. Here, we investigate how the dietary C:P ratio optimising consumer growth ( TER C:P : Threshold Elemental Ratio) changes along temperature gradients by combining a temperature‐dependent TER C:P model with growth experiments on Daphnia magna . Both lines of evidence show that the TER C:P response to temperature is U‐shaped. This shape indicates that consumer nutrient requirements can both increase or decrease with increasing temperature, thus reconciling previous contradictive observations into a common framework. This unified framework improves our capacity to forecast the combined effects of nutrient cycle and climatic alterations on invertebrate production.