| Title: | Composition of a chemical signalling trait varies with phylogeny and precipitation across an Australian lizard radiation |
| Author(s): | Zozaya SM; Teasdale LC; Moritz C; Higgie M; Hoskin CJ; |
| Address: | "Research School of Biology, Australian National University, Acton, Australian Capital Territory, Australia. College of Science and Engineering, James Cook University, Townsville, Queensland, Australia. Department of Molecular Biology, Max Planck Institute for Developmental Biology, Tubingen, Germany" |
| ISSN/ISBN: | 1420-9101 (Electronic) 1010-061X (Linking) |
| Abstract: | "The environment presents challenges to the transmission and detection of animal signalling systems, resulting in selective pressures that can drive signal divergence amongst populations in disparate environments. For chemical signals, climate is a potentially important selective force because factors such as temperature and moisture influence the persistence and detection of chemicals. We investigated an Australian lizard radiation (Heteronotia) to explore relationships between a sexually dimorphic chemical signalling trait (epidermal pore secretions) and two key climate variables: temperature and precipitation. We reconstructed the phylogeny of Heteronotia with exon capture phylogenomics, estimated phylogenetic signal in amongst-lineage chemical variation and assessed how chemical composition relates to temperature and precipitation using multivariate phylogenetic regressions. High estimates of phylogenetic signal indicate that the composition of epidermal pore secretions varies amongst lineages in a manner consistent with Brownian motion, although there are deviations to this, with stark divergences coinciding with two phylogenetic splits. Accounting for phylogenetic non-independence, we found that amongst-lineage chemical variation is associated with geographic variation in precipitation but not temperature. This contrasts somewhat with previous lizard studies, which have generally found an association between temperature and chemical composition. Our results suggest that geographic variation in precipitation can affect the evolution of chemical signalling traits, possibly influencing patterns of divergence amongst lineages and species" |
| Keywords: | Animals Australia Biological Evolution Climate *Lizards/genetics Phylogeny chemical signal lizard multivariate phylogenetic regression mvGLS pheromone; |
| Notes: | "MedlineZozaya, Stephen M Teasdale, Luisa C Moritz, Craig Higgie, Megan Hoskin, Conrad J eng Australian Geographic Society/ Australian Research Council/ James Cook University/ Society of Australian Systematic Biologists/ Society of Systematic Biologists/ American Society of Ichthyologists and Herpetologists/ Research Support, Non-U.S. Gov't Switzerland 2022/06/07 J Evol Biol. 2022 Jul; 35(7):919-933. doi: 10.1111/jeb.14031. Epub 2022 Jun 5" |
