Comparison of Hydric and Thermal Physiology in an Environmentally Diverse Clade of Caribbean Anoles

Integrative and Comparative Biology, Journal Year: 2024, Volume and Issue: 64(2), P. 377 - 389

Published: April 29, 2024

As the world becomes warmer and precipitation patterns less predictable, organisms will experience greater heat water stress. It is crucial to understand factors that predict variation in thermal hydric physiology among species. This study focuses on investigating relationships between diversity their environmental predictors a clade of Hispaniolan anole lizards, which are part broader Caribbean adaptive radiation. clade, "cybotoid" anoles, occupies wide range habitats (from sea level several kilometers above it) (such as xeric scrub, broadleaf forest, pine forest), setting up possibility for ecophysiological specialization Among traits, only cold tolerance correlated with temperature, none our climate variables physiology. Nevertheless, we found negative relationship (critical maximum) evaporative loss at higher temperatures, such more heat-tolerant lizards also desiccation-tolerant temperatures. finding hints shared underscoring importance considering interactive effects temperature balance studies. While differentiation core feature radiation, results suggest close relatives this lineage do not diverge partially

Language: Английский

---

When adaptation is slowed down: Genomic analysis of evolutionary stasis in thermal tolerance during biological invasion in a novel climate

Molecular Ecology, Journal Year: 2023, Volume and Issue: 33(10)

Published: July 25, 2023

Research conducted during the past two decades has demonstrated that biological invasions are excellent models of rapid evolution. Even so, characteristics invasive populations such as a short time for recombination to assemble optimal combinations alleles may occasionally limit adaptation new environments. Here, we investigated genetic constraints in brown anole (Anolis sagrei)-a tropical ectotherm was introduced southeastern United States, region with much colder climate than its native Caribbean range. We examined thermal physiology 30 and tested climatic cline cold tolerance. Also, used genomics identify mechanisms adaptation. found no support cline, indicating tolerance did not shift adaptively. Concomitantly, population genomic results were consistent occurrence spots comprise more half genome maintain long-range associations among populations. These regions overlap both candidate loci identified using standard genome-wide association test. Moreover, do have large contribution differentiation range, contrary observations suggest limited is constraining swaths anoles. Our study provides an example evolutionary stasis invasion highlights possibility reduced slows down

Language: Английский

---

Stronger evidence for genetic ancestry than environmental conditions in shaping the evolution of a complex signalling trait during biological invasion

Molecular Ecology, Journal Year: 2023, Volume and Issue: 32(20), P. 5558 - 5574

Published: Sept. 12, 2023

Introductions of invasive species to new environments often result in rapid rates trait evolution. While some cases these evolutionary transitions are adaptive and driven by natural selection, they can also from patterns genetic phenotypic variation associated with the invasion history. Here, we examined brown anole (Anolis sagrei), a widespread lizard for which data have helped trace sources non-native populations. We focused on dewlap, complex signalling known be subject multiple selective pressures. measured dewlap reflectance, pattern size 30 populations across southeastern United States. As well, quantified environmental variables influence signal effectiveness, such as canopy openness. Further, used genome-wide estimate ancestry, perform association mapping test signatures selection. found that among-population characteristics was best explained ancestry. This supported mapping, identified several ancestry-specific loci traits. Despite strong imprint this aspect history variation, detected significant relationships between traits local conditions. However, limited evidence dewlap-associated variants been Our study emphasizes importance ancestry admixture shaping phenotypes during biological invasion, while leaving role selection unresolved, likely due polygenic architecture dewlaps acting many genes small effect.

Language: Английский

---

Stronger evidence for genetic ancestry than environmental conditions in shaping the evolution of a complex signaling trait during biological invasion

Authorea (Authorea), Journal Year: 2023, Volume and Issue: unknown

Published: Aug. 9, 2023

Introductions of invasive species to new environments often result in rapid rates trait evolution. While some cases these evolutionary transitions are adaptive and driven by natural selection, they can also from patterns genetic phenotypic variation associated with the invasion history. Here, we examined brown anole (Anolis sagrei), a widespread lizard for which data have helped trace sources non-native populations. We focused on dewlap, complex signaling known be subject multiple selective pressures. measured dewlap reflectance, pattern, size 30 populations across southeastern United States. As well, quantified environmental variables influence signal effectiveness, such as canopy openness. Further, used genome-wide estimate ancestry, perform association mapping, test signatures selection. found that among-population characteristics was best explained ancestry. This supported identified several ancestry-specific loci traits. Despite strong imprint this aspect history variation, detected significant relationships between traits local conditions. However, limited evidence dewlap-associated variants been Our study emphasizes importance ancestry admixture shaping phenotypes during biological invasion, while leaving role selection unresolved, likely due polygenic architecture dewlaps acting many genes small effect.

Language: Английский

---