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by claude@2026-07, 2026-07-03
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The paper investigates whether dispersal-driven biogeographic history, specifically late Pleistocene range dynamics, has shaped geographic patterns of within-species phenotypic variation, focusing on dispersal-related personality, performance, and morphology in the Tyrrhenian tree frog Hyla sarda. Frogs were collected from four sites along a hypothesized northward expansion route between Sardinia and Corsica, with statistical control for altitude, local habitat, demographic factors, and bioclimatic differences, and two personality traits, two locomotory performance traits, and relevant morphological traits were measured. Individuals from the northern Corsica sites were more “prudent” in a novel environment and showed larger body size and limb/head measures along with stronger take-off and adhesion performance than individuals from the Sardinia source area, indicating non-random spatial sorting of multiple traits along the expansion route. The paper does not explicitly discuss endometriosis or adenomyosis; it was included in the corpus via a keyword match in the upstream search index.
Abstract
Addressing how individual variation within populations drives the evolution of biodiversity patterns is a major challenge in ecology and evolutionary biology. Historical biogeographic processes have had dramatic consequences on the structure of biodiversity. However, while the interplay between historical processes and genotypic diversity within populations has been widely investigated, the effects of such processes on phenotypic diversity remain poorly explored. Here, we investigate whether dispersal-driven processes of historical biogeographic relevance, such as late Pleistocene range dynamics, have contributed to shape the geographic patterns of phenotypic trait variation. We focus on dispersal-related personality, morphological and performance traits in the Tyrrhenian tree frog, Hyla sarda, which underwent a northward range expansion from the Sardinia Island to the Corsica Island during the Last Glacial Maximum, when a temporary land-bridge connected these islands. We collected tree frogs from four geographic areas along the past expansion route, controlling for altitude, local habitat, demographic factors, and bioclimatic differences between geographic areas. Then, we scored intraspecific variation in two personality traits, two performance traits, along with morphological traits likely involved in the dispersal process. Tree frogs from the northern area in Corsica were more prudent in a novel environment, they had significantly larger body size, longer limbs, wider heads, and displayed stronger take-off and adhesion performances compared to individuals from the source area in Sardinia. Overall, these results suggest a non-random spatial sorting of the intraspecific variation in multiple phenotypic traits during the range expansion phase. In turn, they also suggest that population differentiation in phenotypic traits associations might be a legacy of past biogeographic dynamics, identifying an overlooked driver of the current phenotypic architecture of animal populations.
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Understanding how interindividual variation within populations drives the evolution of biodiversity patterns is a major challenge in ecology and evolutionary biology. By reshuffling species distribution in space and time, historical biogeographic processes have dramatically affected the structure of biodiversity. While the genetic legacy left by these historical processes within populations has been widely investigated, their effects on phenotypic diversity remain relatively unexplored. Here, we investigate whether dispersal-driven processes of historical biogeographic relevance, such as late Pleistocene range dynamics, have contributed to shape the geographic patterns of phenotypic trait variation. We focus on dispersal-related personality, morphological and performance traits in the Tyrrhenian tree frog, Hyla sarda, which underwent a northward range expansion from the Sardinia Island to the Corsica Island during the Last Glacial Maximum, when a temporary land-bridge connected these islands. We collected tree frogs from four geographic areas along the past expansion route, controlling for altitude, local habitat, demographic factors, and bioclimatic differences between geographic areas. Then, we scored variation in two personality traits, two performance traits, along with morphological traits likely involved in the dispersal process. Tree frogs from the northern area in Corsica were more prudent in a novel environment, they had significantly larger body sizes, longer limbs, wider heads, and displayed stronger take-off and adhesion performances compared to individuals from the source area in Sardinia. The results of our study suggest a non-random spatial sorting of the intraspecific variation in multiple phenotypic traits along the range expansion route. They also suggest that population differentiation in phenotypic traits associations might be a legacy of past biogeographic dynamics, identifying a potential driver of the current phenotypic architecture of animal populations.
https://doi.org/10.32942/X24S62
Life Sciences
Pleistocene range expansion, dispersal, Personality, locomotory performance, biogeography
Published: 2024-07-25 16:15
Last Updated: 2024-11-07 13:50
CC-By Attribution-NonCommercial-NoDerivatives 4.0 International
Conflict of interest statement:
The Authors declare no conflict of interests
Language:
English
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