Genetic diversity and population differentiation within and between island populations of two sympatric Petroica robins, the Chatham Island black robin and tomtit

Natalie J. Forsdick, Ilina Cubrinovska, Melanie Massaro, Marie L. Hale

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Small island populations are particularly prone to extinction due to the effects of genetic drift and inbreeding reducing genetic variation and fitness of such populations. Furthermore, isolated island populations may experience population divergence due to drift or divergent selection. Reciprocal translocations of individuals between populations may be used to stimulate gene flow between such isolated populations. To determine whether populations of the endangered Chatham Island black robin Petroica traversi may benefit from such translocations, we compared levels of genetic diversity and differentiation within and among populations of the black robin and its sympatric sister-species, the Chatham Island tomtit Petroica macrocephala chathamensis. Although the black robin has recovered following a severe population bottleneck, the bottleneck and subsequent intense inbreeding experienced by the black robin have likely had long-term consequences affecting the viability of this endangered species. We analysed the genetic diversity and population structure of the black robin at 15 polymorphic microsatellite loci, and compared this to the level and pattern of genetic diversity from 17 polymorphic loci for the tomtit, which comprises three larger island populations. The black robin displayed a lower number of alleles and expected heterozygosity than the Chatham Island tomtit. We also found that island populations of both species have differentiated from one another, likely due to strong genetic drift acting independently on these populations over a period of isolation. Reciprocal translocations of black robins between islands are recommended to prevent further loss of diversity through drift, and so to improve the probability of species persistence.
Original languageEnglish
Pages (from-to)275-285
Number of pages11
JournalConservation Genetics
Volume18
Issue number2
DOIs
Publication statusPublished - 01 Apr 2017

Fingerprint

Songbirds
Islands
genetic variation
Population
translocation
genetic drift
inbreeding
reciprocal translocation
Genetic Drift
Inbreeding
population bottleneck
genetic diversity
isolated population
endangered species
genetic differentiation
heterozygosity
gene flow
Genetic Fitness
population structure
Sympatry

Cite this

@article{6fe04664f9f14c968175bb97d03815d8,
title = "Genetic diversity and population differentiation within and between island populations of two sympatric Petroica robins, the Chatham Island black robin and tomtit",
abstract = "Small island populations are particularly prone to extinction due to the effects of genetic drift and inbreeding reducing genetic variation and fitness of such populations. Furthermore, isolated island populations may experience population divergence due to drift or divergent selection. Reciprocal translocations of individuals between populations may be used to stimulate gene flow between such isolated populations. To determine whether populations of the endangered Chatham Island black robin Petroica traversi may benefit from such translocations, we compared levels of genetic diversity and differentiation within and among populations of the black robin and its sympatric sister-species, the Chatham Island tomtit Petroica macrocephala chathamensis. Although the black robin has recovered following a severe population bottleneck, the bottleneck and subsequent intense inbreeding experienced by the black robin have likely had long-term consequences affecting the viability of this endangered species. We analysed the genetic diversity and population structure of the black robin at 15 polymorphic microsatellite loci, and compared this to the level and pattern of genetic diversity from 17 polymorphic loci for the tomtit, which comprises three larger island populations. The black robin displayed a lower number of alleles and expected heterozygosity than the Chatham Island tomtit. We also found that island populations of both species have differentiated from one another, likely due to strong genetic drift acting independently on these populations over a period of isolation. Reciprocal translocations of black robins between islands are recommended to prevent further loss of diversity through drift, and so to improve the probability of species persistence.",
keywords = "Black robin, Chatham Island tomtit, Conservation, Genetic diversity",
author = "Forsdick, {Natalie J.} and Ilina Cubrinovska and Melanie Massaro and Hale, {Marie L.}",
note = "Includes bibliographical references.",
year = "2017",
month = "4",
day = "1",
doi = "10.1007/s10592-016-0899-1",
language = "English",
volume = "18",
pages = "275--285",
journal = "Conservation Genetics",
issn = "1566-0621",
publisher = "Springer Netherlands",
number = "2",

}

Genetic diversity and population differentiation within and between island populations of two sympatric Petroica robins, the Chatham Island black robin and tomtit. / Forsdick, Natalie J.; Cubrinovska, Ilina; Massaro, Melanie; Hale, Marie L.

In: Conservation Genetics, Vol. 18, No. 2, 01.04.2017, p. 275-285.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Genetic diversity and population differentiation within and between island populations of two sympatric Petroica robins, the Chatham Island black robin and tomtit

AU - Forsdick, Natalie J.

AU - Cubrinovska, Ilina

AU - Massaro, Melanie

AU - Hale, Marie L.

N1 - Includes bibliographical references.

PY - 2017/4/1

Y1 - 2017/4/1

N2 - Small island populations are particularly prone to extinction due to the effects of genetic drift and inbreeding reducing genetic variation and fitness of such populations. Furthermore, isolated island populations may experience population divergence due to drift or divergent selection. Reciprocal translocations of individuals between populations may be used to stimulate gene flow between such isolated populations. To determine whether populations of the endangered Chatham Island black robin Petroica traversi may benefit from such translocations, we compared levels of genetic diversity and differentiation within and among populations of the black robin and its sympatric sister-species, the Chatham Island tomtit Petroica macrocephala chathamensis. Although the black robin has recovered following a severe population bottleneck, the bottleneck and subsequent intense inbreeding experienced by the black robin have likely had long-term consequences affecting the viability of this endangered species. We analysed the genetic diversity and population structure of the black robin at 15 polymorphic microsatellite loci, and compared this to the level and pattern of genetic diversity from 17 polymorphic loci for the tomtit, which comprises three larger island populations. The black robin displayed a lower number of alleles and expected heterozygosity than the Chatham Island tomtit. We also found that island populations of both species have differentiated from one another, likely due to strong genetic drift acting independently on these populations over a period of isolation. Reciprocal translocations of black robins between islands are recommended to prevent further loss of diversity through drift, and so to improve the probability of species persistence.

AB - Small island populations are particularly prone to extinction due to the effects of genetic drift and inbreeding reducing genetic variation and fitness of such populations. Furthermore, isolated island populations may experience population divergence due to drift or divergent selection. Reciprocal translocations of individuals between populations may be used to stimulate gene flow between such isolated populations. To determine whether populations of the endangered Chatham Island black robin Petroica traversi may benefit from such translocations, we compared levels of genetic diversity and differentiation within and among populations of the black robin and its sympatric sister-species, the Chatham Island tomtit Petroica macrocephala chathamensis. Although the black robin has recovered following a severe population bottleneck, the bottleneck and subsequent intense inbreeding experienced by the black robin have likely had long-term consequences affecting the viability of this endangered species. We analysed the genetic diversity and population structure of the black robin at 15 polymorphic microsatellite loci, and compared this to the level and pattern of genetic diversity from 17 polymorphic loci for the tomtit, which comprises three larger island populations. The black robin displayed a lower number of alleles and expected heterozygosity than the Chatham Island tomtit. We also found that island populations of both species have differentiated from one another, likely due to strong genetic drift acting independently on these populations over a period of isolation. Reciprocal translocations of black robins between islands are recommended to prevent further loss of diversity through drift, and so to improve the probability of species persistence.

KW - Black robin

KW - Chatham Island tomtit

KW - Conservation

KW - Genetic diversity

UR - http://www.scopus.com/inward/record.url?scp=84992428167&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84992428167&partnerID=8YFLogxK

U2 - 10.1007/s10592-016-0899-1

DO - 10.1007/s10592-016-0899-1

M3 - Article

AN - SCOPUS:84992428167

VL - 18

SP - 275

EP - 285

JO - Conservation Genetics

JF - Conservation Genetics

SN - 1566-0621

IS - 2

ER -