Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/151386
Title: | A novel integrative approach elucidates fine-scale dispersal patchiness in marine populations |
Author: | Schunter, Celia Pascual Berniola, Marta Raventós, N. Garriga, J. Garza, J.C. Bartumeus, F. Macpherson, Enrique |
Keywords: | Comunitats animals Ecologia marina Animal communities Marine ecology |
Issue Date: | 25-Jul-2019 |
Publisher: | Nature Publishing Group |
Abstract: | Dispersal is one of the main determining factors of population structure. In the marine habitat, well-connected populations with large numbers of reproducing individuals are common but even so population structure can exist on a small-scale. Variation in dispersal patterns between populations or over time is often associated to geographic distance or changing oceanographic barriers. Consequently, detecting structure and variation in dispersal on a fine-scale within marine populations still remains a challenge. Here we propose and use a novel approach of combining a clustering model, early-life history trait information from fish otoliths, spatial coordinates and genetic markers to detect very fine-scale dispersal patterns. We collected 1573 individuals (946 adults and 627 juveniles) of the black-faced blenny across a small-scale (2 km) coastline as well as at a larger-scale area (<50 kms). A total of 178 single nucleotide polymorphism markers were used to evaluate relatedness patterns within this well-connected population. In our clustering models we categorized SHORT-range dispersers to be potential local recruits based on their high relatedness within and low relatedness towards other spatial clusters. Local retention and/or dispersal of this potential local recruitment varied across the 2 km coastline with higher frequency of SHORT-range dispersers towards the southwest of the area for adults. An inverse pattern was found for juveniles, showing an increase of SHORT-range dispersers towards the northeast. As we rule out selective movement and mortality from one year to the next, this pattern reveals a complex but not full genetic mixing, and variability in coastal circulation is most likely the main driver of this fine-scale chaotic genetic patchiness within this otherwise homogeneous population. When focusing on the patterns within one recruitment season, we found large differences in temperatures (from approx. 17 °C to 25 °C) as well as pelagic larval duration (PLD) for juveniles from the beginning of the season and the end of the season. We were able to detect fine-scale differences in LONG-range juvenile dispersers, representing distant migrants, depending on whether they were born at the beginning of the season with a longer PLD, or at the end of the reproductive season. The ability to detect such fine-scale dispersal patchiness will aid in our understanding of the underlying mechanisms of population structuring and chaotic patchiness in a wide range of species even with high potential dispersal abilities. |
Note: | Reproducció del document publicat a: https://doi.org/10.1038/s41598-019-47200-w |
It is part of: | Scientific Reports, 2019, vol. 9, p. 10786 |
URI: | http://hdl.handle.net/2445/151386 |
Related resource: | https://doi.org/10.1038/s41598-019-47200-w |
ISSN: | 2045-2322 |
Appears in Collections: | Articles publicats en revistes (Genètica, Microbiologia i Estadística) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
693225.pdf | 1.83 MB | Adobe PDF | View/Open |
This item is licensed under a Creative Commons License