Effects of Environmentally Induced Development-Rate Variation on Head and Limb Morphology in the Green Tree Frog, Hyla cinerea

Blouin, Michael S.; Loeb, Michael L. G.

doi:10.1086/285245

Cited by 34 publications

(40 citation statements)

References 38 publications

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“…In addition, there has been ample opportunity for selection to act on morphology. Relative limb length and head length have functional relevance for locomotion and feeding, and their plasticity in relation to shifts in life-history traits has been studied in detail (34,(49)(50)(51)(52). Observed plastic changes in morphology within species were relatively minor (1-5% in length), and they were unlikely to have a high impact on locomotor performance or predator escape efficiency (31), and thus they were unlikely to have large effects on fitness and to be the direct target of natural selection.…”

Section: Discussionmentioning

confidence: 99%

Developmental plasticity mirrors differences among taxa in spadefoot toads linking plasticity and diversity

Gómez-Mestre

Buchholz

2006

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

162

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Developmental plasticity is found in most organisms, but its role in evolution remains controversial. Environmentally induced phenotypic differences may be translated into adaptive divergence among lineages experiencing different environmental conditions through genetic accommodation. To examine this evolutionary mechanism, we studied the relationship between plasticity in larval development, postmetamorphic morphology, and morphological diversity in spadefoot toads, a group of closely related species that are highly divergent in the larval period and body shape and are distributed throughout temperate areas of both the New and the Old World. Previous studies showed that accelerated metamorphosis is adaptive for desert-dwelling spadefoot toads. We show that even under common garden conditions, spadefoot toad species show divergent reaction norms for the larval period. In addition, experimentally induced changes in the larval period caused correlated morphological changes in postmetamorphic individuals such that long larval periods resulted in relatively longer hindlimbs and snouts. A comparative analysis of morphological variation across spadefoot toad species also revealed a positive correlation between the larval period and limb and snout lengths, mirroring the effects of within-species plasticity at a higher taxonomic level. Indeed, after Ϸ110 Ma of independent evolution, differences in the larval period explain 57% of the variance in relative limb length and 33% of snout length across species. Thus, morphological diversity across these species appears to have evolved as a correlated response to selection for a reduced larval period in desert-dwelling species, possibly diverging from ancestral plasticity through genetic accommodation.allometry ͉ genetic accommodation ͉ life-history evolution ͉ morphological diversity ͉ larval period

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Section: Discussionmentioning

confidence: 99%

Developmental plasticity mirrors differences among taxa in spadefoot toads linking plasticity and diversity

Gómez-Mestre

Buchholz

2006

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

162

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“…We estimated adjusted mean differences in morphology between environments by using analysis of covariance (GLM module,STATISTICA 8.0,Statsoft) (Blouin & Loeb 1991) and Rana cascadae (Blouin & Brown 2000), snout -vent length (SVL) (mm) was employed as covariate, and the first principal component (PC1) was used as a covariate in Discoglossus galganoi (Nicieza et al 2006). The environment -body size interaction term was included in the model to test for heterogeneity of slopes.…”

Section: Datamentioning

confidence: 99%

“…Thus we considered developmental time as the time elapsed from the start of larval feeding phase (Gosner stage 25;Gosner 1960) to metamorphic climax with foreleg protrusion (Gosner stage 42). Size at metamorphosis was estimated as mass at metamorphosis after full tail resorption (Gosner stage 46), mass at Gosner stage 42 (Capellán & Nicieza 2007) or SVL (Blouin & Loeb 1991 ) was estimated as body size at metamorphosis divided by developmental time.…”

Section: Datamentioning

confidence: 99%

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Contrasting effects of environmental factors during larval stage on morphological plasticity in post-metamorphic frogs

Tejedo¹,

Marangoni²,

Pertoldi³

et al. 2010

Clim. Res.

109

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In organisms with complex life cycles, environmentally induced plasticity across sequential stages can have important consequences on morphology and life history traits such as developmental and growth rates. However, previous research in amphibians and other ectothermic vertebrates suggests that some morphological traits are generally insensitive to environmental inductions. We conducted a literature survey to examine the allometric responses in relative hind leg length and head shape of post-metamorphic anuran amphibians to induced environmental (temperature, resource level, predation and desiccation risk) variation operating during the larval phase in 44 studies using 19 species. To estimate and compare plastic responses across studies, we employed both an index of plasticity and effect sizes from a meta-analysis. We found contrasting trait responses to different environmental cues. Higher temperatures increased development more than growth rate and induced smaller heads but not overall shifts in hind leg length. In contrast, an increment in resource availability increased growth more than development, with a parallel increase in hind leg length but no change in head shape. Increases in predation risk decreased both development and growth rates and slightly reduced relative hind leg length, but there was no change in head shape. Pond desiccation induced quick development and low growth rates, with no changes in morphology. Across environments, both hind leg and head shape plasticity were positively correlated with growth rate plasticity. However, plasticity of developmental rate was only correlated with head shape plasticity. Overall, these results suggest that environmental trends predicted by global warming projections, such as increasing pond temperature and accelerating pond desiccation, will significantly influence hind leg and head morphology in metamorphic frogs, which may affect performance and, ultimately, fitness.

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“…Low temperatures reduce development rates to a greater extent than they reduce growth rate, 389 as a result of which amphibians metamorphose after achieving larger size (Wilbur & Collins, 1973) (Ts1 390 skulls are usually larger than Ts2 skulls). Prey abundance might exert some influence as well (Motyl, 391 2008), but probably not as much (Blouin & Loeb, 1990). Manuscript to be reviewed Cycl T1 T2 T2 T2 T2 T2 T1 T1 T1 T1 T1 T2 T2 T2 T1 T1 T2 T2 T1 T1 T2 T1 T1 T2 …”

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confidence: 99%

Peer Review #3 of "Ornamentation of dermal bones of Metoposaurus krasiejowensis and its ecological implications (v0.2)"

Buchwitz¹

2018

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Effects of Environmentally Induced Development-Rate Variation on Head and Limb Morphology in the Green Tree Frog, Hyla cinerea

Cited by 34 publications

References 38 publications

Developmental plasticity mirrors differences among taxa in spadefoot toads linking plasticity and diversity

Developmental plasticity mirrors differences among taxa in spadefoot toads linking plasticity and diversity

Contrasting effects of environmental factors during larval stage on morphological plasticity in post-metamorphic frogs

Peer Review #3 of "Ornamentation of dermal bones of Metoposaurus krasiejowensis and its ecological implications (v0.2)"

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