10.5061/DRYAD.68FR52P
Buckley, Lauren B.
University of Washington
Khaliq, Imran
Technical University Munich
Swanson, David L.
University of South Dakota
Hof, Christian
Technical University Munich
Data from: Does metabolism constrain bird and mammal ranges and predict
shifts in response to climate change?
Dryad
dataset
2019
Mammalia
metabolic expansibility
range limit
metabolic scope
Holocene
National Science Foundation
https://ror.org/021nxhr62
DBI-1349865, OIA-1632810
2019-09-10T00:00:00Z
2019-09-10T00:00:00Z
en
https://doi.org/10.1002/ece3.4537
104356 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Mechanistic approaches for predicting the ranges of endotherms are needed
to forecast their responses to environmental change. We test whether
physiological constraints on maximum metabolic rate and the factor by
which endotherms can elevate their metabolism (metabolic expansibility)
influence cold range limits for mammal and bird species. We examine
metabolic expansibility at the cold range boundary (MECRB) and whether
species’ traits can predict variability in MECRB and then use MECRB as an
initial approach to project range shifts for 210 mammal and 61 bird
species. We find evidence for metabolic constraints: the distributions of
metabolic expansibility at the cold range boundary peak at similar values
for birds (2.7) and mammals (3.2). The right skewed distributions suggest
some species have adapted to elevate or evade metabolic constraints.
Mammals exhibit greater skew than birds, consistent with their diverse
thermoregulatory adaptations and behaviors. Mammal and bird species that
are small and occupy low trophic levels exhibit high levels of MECRB.
Mammals with high MECRB tend to hibernate or use torpor. Predicted
metabolic rates at the cold range boundaries represent large energetic
expenditures (>50% of maximum metabolic rates). We project species
to shift their cold range boundaries poleward by an average of 3.9°
latitude by 2070 if metabolic constraints remain constant. Our analysis
suggests that metabolic constraints provide a viable mechanism for initial
projections of the cold range boundaries for endotherms. However, errors
and approximations in estimating metabolic constraints (e.g., acclimation
responses) and evasion of these constraints (e.g., torpor/hibernation,
microclimate selection) highlight the need for more detailed,
taxa‐specific mechanistic models. Even coarse considerations of metabolism
will likely lead to improved predictions over exclusively considering
thermal tolerance for endotherms.
Metabolic expansibility dataSpecies, physiological, and environmental
data. See README file for explanation of columns. R code to run the
analysis is available here:
https://github.com/lbuckley/tnz.MRexpansibility_Buckleyetal_Data.csv
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