Home About Browse Search
Svenska


Expansion rate & dispersal pattern of the non-native Roesel’s bush-cricket in Sweden

Preuss, Sonja (2012). Expansion rate & dispersal pattern of the non-native Roesel’s bush-cricket in Sweden. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2012:44
ISBN 978-91-576-7680-1
[Doctoral thesis]

[img]
Preview
PDF
3MB

Abstract

Environmental change and anthropogenic activities influence species distributions. Species introductions have become increasingly common in an era of globalization and increased international trade and travel. The establishment of introduced species outside their native range and subsequent spread are of great conservation concern.
Introduced species that become invasive, spread rapidly and reach high abundance, may cause the extinction of native species, disrupt ecosystem functioning and pose a threat to human health and the economy. It is therefore of great interest to understand the processes and mechanisms involved in species range expansion in order to develop
effective management strategies. In this thesis I examine the influence of the landscape on species’ distribution and analyse patterns of range expansion of a non-native insect
in south-central Sweden. Roesel’s bush-cricket (Metrioptera roeselii) was chosen as a model organism as its biology is well studied and its range expansion has been documented not only in Sweden but also in several other European countries. The aims of this thesis were (I) to identify landscape variables that predict the species distribution, (II) to estimate the rate of range expansion, (III) to identify the source of range expansion in south-central Sweden and to assess the dispersal pattern using population genetic data, and (IV) to analyse the influence of landscape composition and structure on population connectivity. I analysed species distribution, genetic and
landscape data using a range of statistical modelling techniques in combination with geographic information systems (GIS). The results showed that the amounts of arable
land, pasture and rural settlements as well as linear habitat elements are important predictors of the species’ distribution. During the last three decades, Metrioptera
roeselii has expanded its range from the northern shores of the Lake Mälaren at an estimated rate of 0.3 - 3.16 km/year. The genetic diversity across the range was surprisingly high and degree of population differentiation was low to moderate likely due to frequent gene flow between populations in the centre of the species range and
decreased gene flow towards the range margin. It appears the species establishes populations through infrequent long-distance and frequent short-distance dispersal
(natural, human-mediated).

Authors/Creators:Preuss, Sonja
Title:Expansion rate & dispersal pattern of the non-native Roesel’s bush-cricket in Sweden
Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :14 May 2012
Volume:2012:44
Number of Pages:46
Papers/manuscripts:
NumberReferences
I.Sonja Preuss, Åsa Berggren, Anna Cassel-Lundhagen (2011). Modelling the distribution of the invasive Roesel's bush-cricket (Metrioptera roeselii) in a fragmented landscape. NeoBiota 11, 33-49.
II.Sonja Preuss, Matthew Low, Anna Cassel-Lundhagen, Åsa Berggren. Comparing occupancy-based models for calculating expansion rate in a non-native insect. (manuscript).
III.Sonja Preuss, Åsa Berggren, Anna Cassel-Lundhagen. Genetic variation and differentiation in a bush-cricket species under range expansion. (manuscript).
IV.Åsa Berggren, Sonja Preuss, Göran Nordlander, Anna Cassel-Lundhagen. Examining the expansion pattern of Roesel's bush-cricket by use of least-cost path analysis. (manuscript)
Place of Publication:Uppsala
Publisher:Department of Ecology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-7680-1
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:L Animal production > L20 Animal ecology
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Zoology
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Genetics (medical genetics to be 30107 and agricultural genetics to be 40402)
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Agrovoc terms:tettigoniidae, animal population, geographical distribution, invasive species, colonizing ability, genetic variation, landscape, models, sweden
Keywords:distribution modelling, genetic diversity, gene flow, landscape analyses, Orthoptera, range expansion
URN:NBN:urn:nbn:se:slu:epsilon-e-503
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-503
ID Code:8879
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
External funders:Carl Tryggers stiftelse för vetenskaplig forskning and FORMAS
Deposited By: Sonja A Preuss
Deposited On:22 May 2012 06:42
Metadata Last Modified:02 Dec 2014 10:50

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits