scholarly journals Quantifying the energetic cost of food quality constraints on resting metabolism to integrate nutritional and metabolic ecology

2021 ◽  
Author(s):  
Thomas Ruiz ◽  
Apostolos‐Manuel Koussoroplis ◽  
Michael Danger ◽  
Jean‐Pierre Aguer ◽  
Nicole Morel‐Desrosiers ◽  
...  
Keyword(s):  
Food Quality ◽  
Energetic Cost ◽  
Metabolic Ecology ◽  
Resting Metabolism

Free-ranging eastern chipmunks (Tamias striatus) infected with bot fly (Cuterebra emasculator) larvae have higher resting but lower maximum metabolism

2012 ◽  
Vol 90 (3) ◽  
pp. 413-421 ◽  
Author(s):  
V. Careau ◽  
D. Garant ◽  
M.M. Humphries
Keyword(s):  
Energy Budget ◽  
Host Species ◽  
Resting Metabolic Rate ◽  
Aerobic Scope ◽  
Tamias Striatus ◽  
Metabolic Ecology ◽  
Bot Fly ◽  
Lower Maximum ◽  
Fly Larvae ◽  
Free Ranging

Given the ubiquity and evolutionary importance of parasites, their effect on the energy budget of mammals remains surprisingly unclear. The eastern chipmunk ( Tamias striatus (L., 1758)) is a burrowing rodent that is commonly infected by cuterebrid bot fly ( Cuterebra emasculator Fitch, 1856) larvae. We measured resting metabolic rate (RMR) and cold-induced Vo2-max (under heliox atmosphere) in 20 free-ranging individuals, of which 4 individuals were infected by one or two larva. We found that RMR was significantly higher in chipmunks infected by bot fly larvae (mean ± SE = 0.88 ± 0.05 W) than in uninfected individuals (0.74 ± 0.02 W). In contrast, Vo2-max was significantly lower in chipmunks infected by bot fly larvae (4.96 ± 0.70 W) than in uninfected individuals (6.37 ± 0.16 W). Consequently, the aerobic scope (ratio of Vo2-max to RMR) was negatively correlated with the number of bot fly larvae (infected individuals = 5.74 ± 1.03 W; noninfected individuals = 8.67 ± 0.26 W). Finally, after accounting for the effects of body mass and bot fly parasitism on RMR and Vo2-max, there was no correlation between the two variables among individuals within our population. In addition to providing the first estimate of Vo2-max in T. striatus, these results offer additional evidence that bot fly parasitism has significant impacts on the metabolic ecology of this host species.

scholarly journals The Generalized Plant Allometry that Advances Metabolic Ecology Theory

2021 ◽  
Author(s):  
Stuart Bryce Dixon Sopp ◽  
Ruben Valbuena
Keyword(s):  
Empirical Support ◽  
Plant Tissues ◽  
Tree Biomass ◽  
Carbon Cycles ◽  
Lack Of Fit ◽  
Metabolic Ecology ◽  
Complex Relationships ◽  
Global Carbon ◽  
Global Datasets

Abstract Plant allometry is key for determining the role of forests in global carbon cycles, through the calculation of tree biomass using proxy measurements such as tree diameters or heights. Metabolic ecology theory (MET) considers the general principles that underpin allometry, but MET scaling relationships have been challenged on their lack of fit to empirical data and global applicability. We postulated that MET scaling is applicable only for plant tissues combining conductive and supportive functionality (tracheids), but as plants evolved tissues of specialized conductive functionality (vessels) their allometry progressed into more complex relationships. According to this principle, we deducted generalized MET (gMET) relationships with mechanistically deducted coefficients. Our gMET models proved to have exceptional empirical support against global datasets, achieving unbiased predictions across biomes worldwide. These results prove gMET models to be a crucial improvement to MET-based allometry, providing a universally applicable theoretical framework for worldwide estimations of forest carbon.

scholarly journals Testing metabolic ecology theory for allometric scaling of tree size, growth and mortality in tropical forests

2006 ◽  
Vol 9 (5) ◽  
pp. 575-588 ◽  
Author(s):  
Helene C. Muller-Landau ◽  
Richard S. Condit ◽  
Jerome Chave ◽  
Sean C. Thomas ◽  
Stephanie A. Bohlman ◽  
...  
Keyword(s):  
Tropical Forests ◽  
Allometric Scaling ◽  
Tree Size ◽  
Metabolic Ecology ◽  
Size Growth

scholarly journals Comparative metabolic ecology of tropical herbivorous echinoids on a coral reef

PLoS ONE ◽  
2018 ◽  
Vol 13 (1) ◽  
pp. e0190470 ◽  
Author(s):  
Levi S. Lewis ◽  
Jennifer E. Smith ◽  
Yoan Eynaud
Keyword(s):  
Coral Reef ◽  
Metabolic Ecology
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