TY  - JOUR
A1  - Koussoroplis, Apostolos-Manuel
A1  - Schälicke, Svenja
A1  - Raatz, Michael
A1  - Bach, Moritz
A1  - Wacker, Alexander
T1  - Feeding in the frequency domain
T2  - Ecology letters
N2  - Theory predicts that resource variability hinders consumer performance. How this effect depends on the temporal structure of resource fluctuations encountered by individuals remains poorly understood. Combining modelling and growth experiments with Daphnia magna, we decompose the complexity of resource fluctuations and test the effect of resource variance, supply peak timing (i.e. phase) and co-limiting resource covariance along a gradient from high to low frequencies reflecting fine- to coarse-grained environments. Our results show that resource storage can buffer growth at high frequencies, but yields a sensitivity of growth to resource peak timing at lower ones. When two resources covary, negative covariance causes stronger growth depression at low frequencies. However, negative covariance might be beneficial at intermediate frequencies, an effect that can be explained by digestive acclimation. Our study provides a mechanistic basis for understanding how alterations of the environmental grain size affect consumers experiencing variable nutritional quality in nature.
KW  - Cholesterol
KW  - covariance
KW  - Daphnia
KW  - digestive acclimation
KW  - dynamic energy budgets
KW  - food quality
KW  - phosphorus
KW  - storage
KW  - unbalanced diets
Y1  - 2019
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/48985
SN  - 1461-023X
SN  - 1461-0248
VL  - 22
IS  - 7
SP  - 1104
EP  - 1114
PB  - Wiley
CY  - Hoboken
ER  -