lnu.sePublikasjoner
Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Variation in founder groups promotes establishment success in the wild
Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV. (Evolutionary ecology)ORCID-id: 0000-0001-9598-7618
Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.ORCID-id: 0000-0003-0810-7390
Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
2012 (engelsk)Inngår i: Proceedings of the Royal Society of London. Biological Sciences, ISSN 0962-8452, E-ISSN 1471-2954, Vol. 279, nr 1739, s. 2800-2806Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Environmental changes currently pose severe threats to biodiversity, and reintroductions and translocations are increasingly used to protect declining populations and species from extinction. Theory predicts that establishment success should be higher for more variable groups of dissimilar individuals. To test this ‘diversity promotes establishment’ hypothesis, we introduced colour polymorphic pygmy grasshoppers (Tetrix subulata) to different sites in the wild. The number of descendants found at the release sites the subsequent year increased with increasing number of colour morphs in the founder group, and variation in founder groups also positively affected colour morph diversity in the established populations. Since colour morphs differ in morphology, physiology, behaviour, reproductive life history and types of niche used, these findings demonstrate that variation among individuals in functionally important traits promotes establishment success under natural conditions, and further indicate that founder diversity may contribute to evolutionary rescue and increased population persistence.

sted, utgiver, år, opplag, sider
2012. Vol. 279, nr 1739, s. 2800-2806
HSV kategori
Forskningsprogram
Naturvetenskap, Evolutionsbiologi
Identifikatorer
URN: urn:nbn:se:lnu:diva-18040DOI: 10.1098/rspb.2012.0174Scopus ID: 2-s2.0-84862152496OAI: oai:DiVA.org:lnu-18040DiVA, id: diva2:510389
Tilgjengelig fra: 2012-03-16 Laget: 2012-03-16 Sist oppdatert: 2019-02-27bibliografisk kontrollert
Inngår i avhandling
1. Population-level consequences of variation
Åpne denne publikasjonen i ny fane eller vindu >>Population-level consequences of variation
2012 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Consequences of within population variation have recently attracted an increased interest in evolutionary ecology research. Theoretical models suggest important population-level consequences, but many of these predictions still remain to be tested. These issues are important for a deepened understanding of population performances and persistence, especially in a world characterized by rapid fragmentation of natural habitats and other environmental changes.

I review theoretical models of consequences from intra population genetic and phenotypic variation. I find that more variable populations are predicted to be characterized by broader resource use, reduced intraspecific competition, reduced vulnerability to environmental changes, more stable population dynamics, higher invasive potential, enhanced colonization and establishment success, larger distribution ranges, higher evolvability, higher productivity, faster population growth rate, decreased extinction risk, and higher speciation rate, compared with less variable populations.

To test some of these predictions I performed experiments and compared how different degree of colour polymorphism influences predation risk and establishment success in small groups. My comparisons of predation risk in mono- and polymorphic artificial prey populations showed that the risk of being eaten by birds does not only depend on the coloration of the individual prey item itself, but also on the coloration of the other members of the group. Two experiments on establishment success in small founder groups of

Tetrix subulata pygmy grasshoppers with different degree of colour morph diversity show that establishment success increases with higher degree of diversity, both under controlled conditions in outdoor enclosures and in the wild. These findings may be important for re-stocking of declining populations or re-introductions of locally extinct populations in conservation biology projects.

I report on remarkably rapid evolutionary shifts in colour morph frequencies in response to the changed environmental conditions in replicated natural populations of pygmy grasshoppers in fire ravaged areas. This finding

1

illustrates the high adaptive potential in a polymorphic species, and indicates the importance of preserved within-species diversity for evolutionary rescue.

Finally, I review if theoretical predictions are supported by other published empirical tests and find strong support for the predictions that more variable groups benefit from reduced vulnerability to environmental changes, reduced population fluctuations and extinction risk, larger distribution ranges, and higher colonization or establishment success.

In conclusion, my thesis illustrates how within-population variation influences ecological and evolutionary performances of populations both in the short and long term. As such, it emphasizes the need for conservation of biodiversity also within populations.

sted, utgiver, år, opplag, sider
Kalmar: Linnaeus University Press, 2012. s. 53
Serie
Linnaeus University Dissertations ; 105
Emneord
colour polymorphism, diversity, establishment success, evolutionary changes, population-level consequences, predation risk, Tetrix subulata, variation
HSV kategori
Forskningsprogram
Ekologi, Evolutionsbiologi
Identifikatorer
urn:nbn:se:lnu:diva-32522 (URN)978-91-86983-90-1 (ISBN)
Disputas
2012-12-14, Fullriggaren, Linnéuniversitetet, Landgången 4, Kalmar, 09:00 (engelsk)
Opponent
Veileder
Forskningsfinansiär
Swedish Research Council
Tilgjengelig fra: 2014-03-27 Laget: 2014-02-27 Sist oppdatert: 2019-02-27bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Andre lenker

Forlagets fulltekstScopushttp://rspb.royalsocietypublishing.org/content/early/2012/03/20/rspb.2012.0174.full

Personposter BETA

Forsman, AndersWennersten, LenaKarlsson, MagnusCaesar, Sofia

Søk i DiVA

Av forfatter/redaktør
Forsman, AndersWennersten, LenaKarlsson, MagnusCaesar, Sofia
Av organisasjonen
I samme tidsskrift
Proceedings of the Royal Society of London. Biological Sciences

Søk utenfor DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 268 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf