10.5061/DRYAD.DR7SQV9VR
Tüzün, Nedim
0000-0002-4743-1743
KU Leuven
Debecker, Sara
KU Leuven
Stoks, Robby
KU Leuven
Strong species differences in life-history do not predict oxidative stress
physiology or sensitivity to an environmental oxidant
Dryad
dataset
2020
body condition
energy storage
life-history strategies
physiology/life-history nexus
time constraints
melanisation
Research Foundation - Flanders
https://ror.org/03qtxy027
G.0704.13
Research Foundation - Flanders
https://ror.org/03qtxy027
G.0956.19
KU Leuven
https://ror.org/05f950310
C16/17/002
2020-04-08T00:00:00Z
2020-04-08T00:00:00Z
en
89950 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
1. Species typically align along a fast-slow life-history continuum, yet
it is not clear to what extent oxidative stress physiology can be
integrated with this continuum to form a ‘pace-of-life syndrome’,
especially so in invertebrates. This is important, given the assumed role
of oxidative stress in mediating life-history trade-offs, and the
prediction that species with a faster pace should be more vulnerable to
oxidative stress. 2. We tested whether a species’ life-history pace, here
represented by its growth rate, can predict species-level differentiation
in physiology and sensitivity to oxidative stress. Therefore, we exposed
four species of Ischnura damselflies that strongly align along a fast-slow
life-history continuum to different levels of ultraviolet (UV) radiation.
We measured an extended set of physiological traits linked to the
pace-of-life: standard metabolic rate (SMR), oxidative stress physiology
(antioxidant enzymes and oxidative damage), and defence/condition traits
(investment in immune function, energy storage, and structural defence).
3. Despite strong species differences in growth rate and physiology,
growth rate did not predict species-level differentiation in physiology.
Hence there was no support for the integration of metabolic rate,
oxidative stress physiology or defence/condition traits into a
species-level syndrome. 4. UV exposure affected nearly all traits: it
reduced growth rate and increased metabolic rate, affected all oxidative
stress physiology traits and increased the two defence traits (immune
function, and melanin content). Nevertheless, the pace-of-life based on
growth rate did not predict sensitivity to UV. Instead, the observed
pattern of investment in structural UV defence (melanin) might have
reduced the need for enzymatic antioxidant defence, this way potentially
decoupling the covariation between the life-history pace and oxidative
stress physiology. 5. The absence of an integrated axis of life-history
and physiological variation indicates no major constraints for the
evolution of these traits among the studied damselfly species. Our study
highlights that ecological differences between species may decouple
covariation between species’ life-history pace and their physiology, as
well as their sensitivity to environmental stressors. 30-Mar-2020