Polar lakes may act as ecological islands to aquatic protists.
(2012) In Molecular Ecology 21(13). p.3200-3209- Abstract
- A fundamental question in ecology is whether microorganisms follow the same patterns as multicellular organisms when it comes to population structure and levels of genetic diversity. Enormous population sizes, predominately asexual reproduction and presumably high dispersal because of small body size could have profound implications on their genetic diversity and population structure. Here, we have analysed the population genetic structure in a lake-dwelling microbial eukaryote (dinoflagellate) and tested the hypothesis that there is population genetic differentiation among nearby lake subpopulations. This dinoflagellate occurs in the marine-derived saline lakes of the Vestfold Hills, Antarctica, which are ice-covered most of the year.... (More)
- A fundamental question in ecology is whether microorganisms follow the same patterns as multicellular organisms when it comes to population structure and levels of genetic diversity. Enormous population sizes, predominately asexual reproduction and presumably high dispersal because of small body size could have profound implications on their genetic diversity and population structure. Here, we have analysed the population genetic structure in a lake-dwelling microbial eukaryote (dinoflagellate) and tested the hypothesis that there is population genetic differentiation among nearby lake subpopulations. This dinoflagellate occurs in the marine-derived saline lakes of the Vestfold Hills, Antarctica, which are ice-covered most of the year. Clonal strains were isolated from four different lakes and were genotyped using amplified fragment length polymorphism (AFLP). Our results show high genetic differentiation among lake populations despite their close geographic proximity (<9 km). Moreover, genotype diversity was high within populations. Gene flow in this system is clearly limited, either because of physical or biological barriers. Our results discard the null hypothesis that there is free gene flow among protist lake populations. Instead, limnetic protist populations may differentiate genetically, and lakes act as ecological islands even on the microbial scale. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2609040
- author
- Rengefors, Karin LU ; Logares, Ramiro LU and Laybourn-Parry, J
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Antarctica, biogeography, dinoflagellates, genetic diversity, population genetics, protists
- in
- Molecular Ecology
- volume
- 21
- issue
- 13
- pages
- 3200 - 3209
- publisher
- Wiley-Blackwell
- external identifiers
-
- wos:000305582200010
- pmid:22564188
- scopus:84862755691
- ISSN
- 0962-1083
- DOI
- 10.1111/j.1365-294X.2012.05596.x
- language
- English
- LU publication?
- yes
- id
- fd093123-33d3-435d-82e4-a5cbf765de9c (old id 2609040)
- date added to LUP
- 2016-04-01 09:55:42
- date last changed
- 2024-05-05 00:21:27
@article{fd093123-33d3-435d-82e4-a5cbf765de9c,
abstract = {{A fundamental question in ecology is whether microorganisms follow the same patterns as multicellular organisms when it comes to population structure and levels of genetic diversity. Enormous population sizes, predominately asexual reproduction and presumably high dispersal because of small body size could have profound implications on their genetic diversity and population structure. Here, we have analysed the population genetic structure in a lake-dwelling microbial eukaryote (dinoflagellate) and tested the hypothesis that there is population genetic differentiation among nearby lake subpopulations. This dinoflagellate occurs in the marine-derived saline lakes of the Vestfold Hills, Antarctica, which are ice-covered most of the year. Clonal strains were isolated from four different lakes and were genotyped using amplified fragment length polymorphism (AFLP). Our results show high genetic differentiation among lake populations despite their close geographic proximity (<9 km). Moreover, genotype diversity was high within populations. Gene flow in this system is clearly limited, either because of physical or biological barriers. Our results discard the null hypothesis that there is free gene flow among protist lake populations. Instead, limnetic protist populations may differentiate genetically, and lakes act as ecological islands even on the microbial scale.}},
author = {{Rengefors, Karin and Logares, Ramiro and Laybourn-Parry, J}},
issn = {{0962-1083}},
keywords = {{Antarctica; biogeography; dinoflagellates; genetic diversity; population genetics; protists}},
language = {{eng}},
number = {{13}},
pages = {{3200--3209}},
publisher = {{Wiley-Blackwell}},
series = {{Molecular Ecology}},
title = {{Polar lakes may act as ecological islands to aquatic protists.}},
url = {{http://dx.doi.org/10.1111/j.1365-294X.2012.05596.x}},
doi = {{10.1111/j.1365-294X.2012.05596.x}},
volume = {{21}},
year = {{2012}},
}