Diversity, loss, and gain of malaria parasites in a globally invasive bird.

Invasive species can displace natives, and thus identifying the traits that make aliens successful is crucial for predicting and preventing biodiversity loss. Pathogens may play an important role in the invasive process, facilitating colonization of their hosts in new continents and islands. Accordi...

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Autores principales: Alfonso Marzal, Robert E Ricklefs, Gediminas Valkiūnas, Tamer Albayrak, Elena Arriero, Camille Bonneaud, Gábor A Czirják, John Ewen, Olof Hellgren, Dita Hořáková, Tatjana A Iezhova, Henrik Jensen, Asta Križanauskienė, Marcos R Lima, Florentino de Lope, Eyðfinn Magnussen, Lynn B Martin, Anders P Møller, Vaidas Palinauskas, Péter L Pap, Javier Pérez-Tris, Ravinder N M Sehgal, Manuel Soler, Eszter Szöllosi, Helena Westerdahl, Pavel Zetindjiev, Staffan Bensch
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Publicado: Public Library of Science (PLoS) 2011
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spelling oai:doaj.org-article:4d4811d0f18c4cfb8761b7407a8e09272021-11-18T06:50:27ZDiversity, loss, and gain of malaria parasites in a globally invasive bird.1932-620310.1371/journal.pone.0021905https://doaj.org/article/4d4811d0f18c4cfb8761b7407a8e09272011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21779353/?tool=EBIhttps://doaj.org/toc/1932-6203Invasive species can displace natives, and thus identifying the traits that make aliens successful is crucial for predicting and preventing biodiversity loss. Pathogens may play an important role in the invasive process, facilitating colonization of their hosts in new continents and islands. According to the Novel Weapon Hypothesis, colonizers may out-compete local native species by bringing with them novel pathogens to which native species are not adapted. In contrast, the Enemy Release Hypothesis suggests that flourishing colonizers are successful because they have left their pathogens behind. To assess the role of avian malaria and related haemosporidian parasites in the global spread of a common invasive bird, we examined the prevalence and genetic diversity of haemosporidian parasites (order Haemosporida, genera Plasmodium and Haemoproteus) infecting house sparrows (Passer domesticus). We sampled house sparrows (N = 1820) from 58 locations on 6 continents. All the samples were tested using PCR-based methods; blood films from the PCR-positive birds were examined microscopically to identify parasite species. The results show that haemosporidian parasites in the house sparrows' native range are replaced by species from local host-generalist parasite fauna in the alien environments of North and South America. Furthermore, sparrows in colonized regions displayed a lower diversity and prevalence of parasite infections. Because the house sparrow lost its native parasites when colonizing the American continents, the release from these natural enemies may have facilitated its invasion in the last two centuries. Our findings therefore reject the Novel Weapon Hypothesis and are concordant with the Enemy Release Hypothesis.Alfonso MarzalRobert E RicklefsGediminas ValkiūnasTamer AlbayrakElena ArrieroCamille BonneaudGábor A CzirjákJohn EwenOlof HellgrenDita HořákováTatjana A IezhovaHenrik JensenAsta KrižanauskienėMarcos R LimaFlorentino de LopeEyðfinn MagnussenLynn B MartinAnders P MøllerVaidas PalinauskasPéter L PapJavier Pérez-TrisRavinder N M SehgalManuel SolerEszter SzöllosiHelena WesterdahlPavel ZetindjievStaffan BenschPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 7, p e21905 (2011)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Alfonso Marzal
Robert E Ricklefs
Gediminas Valkiūnas
Tamer Albayrak
Elena Arriero
Camille Bonneaud
Gábor A Czirják
John Ewen
Olof Hellgren
Dita Hořáková
Tatjana A Iezhova
Henrik Jensen
Asta Križanauskienė
Marcos R Lima
Florentino de Lope
Eyðfinn Magnussen
Lynn B Martin
Anders P Møller
Vaidas Palinauskas
Péter L Pap
Javier Pérez-Tris
Ravinder N M Sehgal
Manuel Soler
Eszter Szöllosi
Helena Westerdahl
Pavel Zetindjiev
Staffan Bensch
Diversity, loss, and gain of malaria parasites in a globally invasive bird.
description Invasive species can displace natives, and thus identifying the traits that make aliens successful is crucial for predicting and preventing biodiversity loss. Pathogens may play an important role in the invasive process, facilitating colonization of their hosts in new continents and islands. According to the Novel Weapon Hypothesis, colonizers may out-compete local native species by bringing with them novel pathogens to which native species are not adapted. In contrast, the Enemy Release Hypothesis suggests that flourishing colonizers are successful because they have left their pathogens behind. To assess the role of avian malaria and related haemosporidian parasites in the global spread of a common invasive bird, we examined the prevalence and genetic diversity of haemosporidian parasites (order Haemosporida, genera Plasmodium and Haemoproteus) infecting house sparrows (Passer domesticus). We sampled house sparrows (N = 1820) from 58 locations on 6 continents. All the samples were tested using PCR-based methods; blood films from the PCR-positive birds were examined microscopically to identify parasite species. The results show that haemosporidian parasites in the house sparrows' native range are replaced by species from local host-generalist parasite fauna in the alien environments of North and South America. Furthermore, sparrows in colonized regions displayed a lower diversity and prevalence of parasite infections. Because the house sparrow lost its native parasites when colonizing the American continents, the release from these natural enemies may have facilitated its invasion in the last two centuries. Our findings therefore reject the Novel Weapon Hypothesis and are concordant with the Enemy Release Hypothesis.
format article
author Alfonso Marzal
Robert E Ricklefs
Gediminas Valkiūnas
Tamer Albayrak
Elena Arriero
Camille Bonneaud
Gábor A Czirják
John Ewen
Olof Hellgren
Dita Hořáková
Tatjana A Iezhova
Henrik Jensen
Asta Križanauskienė
Marcos R Lima
Florentino de Lope
Eyðfinn Magnussen
Lynn B Martin
Anders P Møller
Vaidas Palinauskas
Péter L Pap
Javier Pérez-Tris
Ravinder N M Sehgal
Manuel Soler
Eszter Szöllosi
Helena Westerdahl
Pavel Zetindjiev
Staffan Bensch
author_facet Alfonso Marzal
Robert E Ricklefs
Gediminas Valkiūnas
Tamer Albayrak
Elena Arriero
Camille Bonneaud
Gábor A Czirják
John Ewen
Olof Hellgren
Dita Hořáková
Tatjana A Iezhova
Henrik Jensen
Asta Križanauskienė
Marcos R Lima
Florentino de Lope
Eyðfinn Magnussen
Lynn B Martin
Anders P Møller
Vaidas Palinauskas
Péter L Pap
Javier Pérez-Tris
Ravinder N M Sehgal
Manuel Soler
Eszter Szöllosi
Helena Westerdahl
Pavel Zetindjiev
Staffan Bensch
author_sort Alfonso Marzal
title Diversity, loss, and gain of malaria parasites in a globally invasive bird.
title_short Diversity, loss, and gain of malaria parasites in a globally invasive bird.
title_full Diversity, loss, and gain of malaria parasites in a globally invasive bird.
title_fullStr Diversity, loss, and gain of malaria parasites in a globally invasive bird.
title_full_unstemmed Diversity, loss, and gain of malaria parasites in a globally invasive bird.
title_sort diversity, loss, and gain of malaria parasites in a globally invasive bird.
publisher Public Library of Science (PLoS)
publishDate 2011
url https://doaj.org/article/4d4811d0f18c4cfb8761b7407a8e0927
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