No Inbreeding Depression for Low Temperature Developmental Acclimation Across Multiple Drosophila Species

Kristensen, Torsten Nygaard; Loeschcke, Volker; Bilde, Trine; Hoffmann, Ary A.; Sgrò, Carla M.; Noreikienė, Kristina; Ondrésik, Marti; Bechsgaard, Jesper

doi:10.1111/j.1558-5646.2011.01359.x

Cited by 17 publications

(29 citation statements)

References 26 publications

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“…Inbreeding effects on CT max tend to be minor across Drosophila species (40), whereas the impact of laboratory adaptation is less certain (41,42). Nevertheless, in our opinion these confounding effects will be minor relative to heat resistance variation found between species.…”

Section: Discussionmentioning

confidence: 95%

Upper thermal limits of Drosophila are linked to species distributions and strongly constrained phylogenetically

Kellermann

Overgaard

Hoffmann

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

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Upper thermal limits vary less than lower limits among related species of terrestrial ectotherms. This pattern may reflect weak or uniform selection on upper limits, or alternatively tight evolutionary constraints. We investigated this issue in 94 Drosophila species from diverse climates and reared in a common environment to control for plastic effects that may confound species comparisons. We found substantial variation in upper thermal limits among species, negatively correlated with annual precipitation at the central point of their distribution and also with the interaction between precipitation and maximum temperature, showing that heat resistance is an important determinant of Drosophila species distributions. Species from hot and relatively dry regions had higher resistance, whereas resistance was uncorrelated with temperature in wetter regions. Using a suite of analyses we showed that phylogenetic signal in heat resistance reflects phylogenetic inertia rather than common selection pressures. Current species distributions are therefore more likely to reflect environmental sorting of lineages rather than local adaptation. Similar to previous studies, thermal safety margins were small at low latitudes, with safety margins smallest for species occupying both humid and dry tropical environments. Thus, species from a range of environments are likely to be at risk owing to climate change. Together these findings suggest that this group of insects is unlikely to buffer global change effects through marked evolutionary changes, highlighting the importance of facilitating range shifts for maintaining biodiversity.niche conservatism | stress resistance | thermal adaptation | evolutionary history | space T emperatures are expected to rise across the globe over the coming decades and centuries (1), and many studies suggest the potential for range shifts/reductions in many species (2). When assessing the likely impact of temperature changes on species survival, an implicit assumption is that the thermal environment shapes resistance to temperature extremes and thus dictates species range limits. Nevertheless, few studies have directly tested for such links between physiological upper thermal limits of ectothermic species and temperature conditions within their geographic range (3, 4). A related, little-investigated key point for predicting species range responses to climate change is whether upper thermal limits are modifiable through plastic and/or evolutionary responses (5, 6). Ideally, evolutionary and plastic responses within and across generations, including short-term hardening and acclimation, should be separated, as through a common garden approach whereby species are kept under controlled laboratory conditions (7,8). Without controlling for plastic responses, it is not possible to distinguish adaptive evolutionary responses, and species may erroneously seem close to their upper thermal thresholds (9-12), biasing extinction risk estimates.Furthermore, by examining the evolution of upper thermal limits (heat re...

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Section: Discussionmentioning

confidence: 95%

Upper thermal limits of Drosophila are linked to species distributions and strongly constrained phylogenetically

Kellermann

Overgaard

Hoffmann

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

478

560

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“…For species where more than 10 inbred lines were available 10 randomly collected lines were used (11, 13 and 14 lines were available to select from from D. sulfurigaster , D. repleta and D. pseudoananassae , respectively). The experiments were done in the second generation after the last inbreeding round (see [14] for more details).…”

Section: Methodsmentioning

confidence: 99%

“…The temperature was then decreased by 0.1°C per minute. CTmin was scored as the temperature at which flies were in coma unable to move any body parts (see [14] and [15] for details regarding this assay).…”

Section: Methodsmentioning

confidence: 99%

A Comparison of Inbreeding Depression in Tropical and Widespread Drosophila Species

et al. 2013

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The evolutionary history of widespread and specialized species is likely to cause a different genetic architecture of key ecological traits in the two species groups. This may affect how these two groups respond to inbreeding. Here we investigate inbreeding effects in traits related to performance in 5 widespread and 5 tropical restricted species of Drosophila with the aim of testing whether the two species groups suffered differently from inbreeding depression. The traits investigated were egg-to-adult viability, developmental time and resistance to heat, cold and desiccation. Our results showed that levels of inbreeding depression were species and trait specific and did not differ between the species groups for stress resistance traits. However, for the life history traits developmental time and egg-to adult viability, more inbreeding depression was observed in the tropical species. The results reported suggest that for life history traits tropical species of Drosophila will suffer more from inbreeding depression than widespread species in case of increases in the rate of inbreeding e.g. due to declines in population sizes.

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“…The few other studies that jointly report inbreeding and plasticity were performed using Drosophila (Kristensen et al. 2011), frogs (Luquet et al. 2011), and freshwater snails (Auld and Relyea 2010), and these studies report both inbreeding depression for adaptive plasticity as well as no effects at all of inbreeding on adaptive plasticity.…”

Section: Discussionmentioning

confidence: 99%

“…The few studies that have investigated effects of inbreeding on the capacity to show plastic responses to stressors show either strong (Auld and Relyea 2010) or no effects of inbreeding on adaptive plasticity (Kristensen et al. 2011; Luquet et al. 2011).…”

Section: Introductionmentioning

confidence: 99%

Inbreeding and adaptive plasticity: an experimental analysis on predator‐induced responses in the water flea Daphnia

Swillen

Vanoverbeke

Meester

2015

Ecology and Evolution

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Several studies have emphasized that inbreeding depression (ID) is enhanced under stressful conditions. Additionally, one might imagine a loss of adaptively plastic responses which may further contribute to a reduction in fitness under environmental stress. Here, we quantified ID in inbred families of the cyclical parthenogen Daphnia magna in the absence and presence of fish predation risk. We test whether predator stress affects the degree of ID and if inbred families have a reduced capacity to respond to predator stress by adaptive phenotypic plasticity. We obtained two inbred families through clonal selfing within clones isolated from a fish pond. After mild purging under standardized conditions, we compared life history traits and adaptive plasticity between inbred and outbred lineages (directly hatched from the natural dormant egg bank of the same pond). Initial purging of lineages under standardized conditions differed among inbred families and exceeded that in outbreds. The least purged inbred family exhibited strong ID for most life history traits. Predator-induced stress hardly affected the severity of ID, but the degree to which the capacity for adaptive phenotypic plasticity was retained varied strongly among the inbred families. The least purged family overall lacked the capacity for adaptive phenotypic plasticity, whereas the family that suffered only mild purging exhibited a potential for adaptive plasticity that was comparable to the outbred population. We thus found that inbred offspring may retain the capacity to respond to the presence of fish by adaptive phenotypic plasticity, but this strongly depends on the parental clone engaging in selfing.

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No Inbreeding Depression for Low Temperature Developmental Acclimation Across Multiple Drosophila Species

Cited by 17 publications

References 26 publications

Upper thermal limits of Drosophila are linked to species distributions and strongly constrained phylogenetically

Upper thermal limits of Drosophila are linked to species distributions and strongly constrained phylogenetically

A Comparison of Inbreeding Depression in Tropical and Widespread Drosophila Species

Inbreeding and adaptive plasticity: an experimental analysis on predator‐induced responses in the water flea Daphnia

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