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Geographical morpho-physiological variability is linked to genetic diversity in an intertidal false limpet

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Abstract

Intertidal rocky shores have spatial and temporal heterogeneity in their environmental conditions that make them suitable systems in which to explore variations in species’ morpho-physiological and genetic traits. The effect of air desiccation on the mortality and rates of water loss (WL) of Siphonaria lessonii was tested during prolonged air exposure (48 h) at different temperatures (8 and 18 °C) and its relation to shell shape in contrasting geographic habitats. Morphometric and genetic data (ISSR-PCR technique) in limpets from contrasting geographic habitats were thus compared, considering humid temperate climate (MDQ, 38° of latitude) and semi-arid climate (SAO 40° of latitude). These field samplings were complemented with laboratory experiments on WL and mortality under different temperatures. All samples were collected during September and October 2010 from both sites. Both WL and mortality were dependent on size and the habitats where specimens were collected. Specimens collected from SAO (semi-arid climate) were also found to be less sensitive to air exposure at moderate temperatures (e.g., 18 °C) and prolonged air exposure (48 h) compared to MDQ. These patterns agree with morphotype variation in shell size and genetic constitutions between sites. These data demonstrate that the sensitivity of this species to air exposure can change with environmental conditions (such as temperature) and may be dependent on habitat. This shows a previously unknown geographic differential capacity of this limpet to modify WL in response to changes in temperature, which may have further implications on species and genetic distribution in the context of climate change.

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Acknowledgements

This research was funded by Agencia Nacional de Promoción Científica y Tecnológica, Project PIP770 and Universidad Nacional de Mar del Plata, Project EXA 876/18 of PFI. We are also grateful to the two highly dedicated reviewers and the Associate Editor for their constructive comments, which helped us to improve the manuscript.

Funding

This research was funded by Agencia Nacional de Promoción Científica y Tecnológica, Project PIP770 and Universidad Nacional de Mar del Plata, Project EXA 876/18 of PFI.

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This study was part of the Ph. D of the first author, who collected the samples, conducted the analyses, interpreted the data, and wrote the manuscript. PFI helped with genetic analysis, figures, and writing the manuscript. Both authors read and approved the final manuscript.

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Correspondence to J. D. Nuñez.

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All applicable international, national, and/or institutional guidelines for the care and use of animals were followed. This article does not contain any studies with human participants performed by any of the authors.

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227_2022_4035_MOESM1_ESM.jpg

Supplementary file1 S1: Example of digital photograph toke of a specimen of S. lessonni shells from the lateral view with a digital camera (Canon Power Shot A580). (JPG 816 KB)

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Nuñez, J.D., Fernández Iriarte, P. Geographical morpho-physiological variability is linked to genetic diversity in an intertidal false limpet. Mar Biol 169, 49 (2022). https://doi.org/10.1007/s00227-022-04035-w

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  • DOI: https://doi.org/10.1007/s00227-022-04035-w

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