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Mangrove propagules are limited in their capacity to disperse across long distances

Published online by Cambridge University Press:  04 July 2023

Natasha R. Granville Open the ORCID record for Natasha R. Granville [Opens in a new window]  and
Cristina Banks-Leite
Natasha R. Granville*
Affiliation:
Georgina Mace Centre for the Living Planet, Imperial College London, Ascot, UK
Cristina Banks-Leite
Affiliation:
Georgina Mace Centre for the Living Planet, Imperial College London, Ascot, UK
*
Corresponding author: Natasha R. Granville; Email: natasha.granville19@imperial.ac.uk
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Abstract

Mangroves are subject to rapid and large-scale habitat changes, which threaten their unique genetic diversity and provision of critically important ecosystem services. Habitat fragmentation reduces connectivity, which can impair dispersal and lead to genetic isolation. However, it is unclear whether fragmentation could impact mangrove genetic isolation, as mangrove propagules appear to be able to disperse long distances. Here, we conducted a meta-analysis of studies testing for a correlation between geographic distance and genetic distance in mangrove plants. From the 22 studies that met the inclusion criteria, we found a significant isolation-by-distance effect; geographic distance was significantly associated with Nei’s genetic distance and FST. Our results show that mangrove propagules may be limited in their capacity to disperse across long distances, which highlights the importance of maintaining close proximity between habitat patches and reducing habitat fragmentation.

Keywords

dispersal limitationhabitat connectivityisolation-by-distancemangrovesmeta-analysis
Type
Short Communication
Information
Journal of Tropical Ecology , Volume 39 , 2023 , e27
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Copyright
© The Author(s), 2023. Published by Cambridge University Press

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