Connectivity and population subdivision at the fringe of a large brown bear (Ursus arctos) population in North Western Europe View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2012-01-17

AUTHORS

Alexander Kopatz, Hans Geir Eiken, Snorre B. Hagen, Minna Ruokonen, Rodrigo Esparza-Salas, Julia Schregel, Ilpo Kojola, Martin E. Smith, Ingvild Wartiainen, Paul E. Aspholm, Steinar Wikan, Alexander M. Rykov, Olga Makarova, Natalia Polikarpova, Konstantin F. Tirronen, Pjotr I. Danilov, Jouni Aspi

ABSTRACT

Loss of connectivity and habitat destruction may lead to genetic depletion of wild animal populations, especially in species requiring large, connected territories as the brown bear (Ursus arctos). Brown bear populations of North Western Russia, Finland and Northern Norway have been assumed to form one large, continuous population; however this hypothesis has not been tested sufficiently. We have genotyped 1,887 samples from 2005 to 2008 from four distinct areas and used the resulting DNA profiles from 146 different individuals to analyze the genetic diversity, population structure, and the migration rates among groups. In addition, we have tested for traces of previous genetic bottlenecks. Individuals from Eastern Finland and Russian Karelia were grouped in the same cluster (“Karelia”), while distinctive subpopulations of brown bears were detected in the north (“Pasvik”), and the east (“Pinega”). All three subpopulations displayed high genetic variation, with expected heterozygosities (HE) of 0.77–0.81, but differentiation among the clusters was relatively low (average FST = 0.051, P < 0.001). No evidence of genetic bottlenecks in the past was found. We detected a highly significant isolation-by-distance (IBD) pattern. For Pasvik, self-recruitment was found to be very high (96%), pointing to the possibility of genetic isolation. In contrast, between Karelia and Pinega we detected high, bi-directional migration rates (~30%), indicating genetic exchange. Conclusively, despite of a substantial influence of IBD on the genetic structure in the region, we detected considerable variation in connectivity among the identified clusters that could not be explained solely by the distance between them. More... »

PAGES

681-692

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10592-012-0317-2

DOI

http://dx.doi.org/10.1007/s10592-012-0317-2

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1048084523


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14 schema:description Loss of connectivity and habitat destruction may lead to genetic depletion of wild animal populations, especially in species requiring large, connected territories as the brown bear (Ursus arctos). Brown bear populations of North Western Russia, Finland and Northern Norway have been assumed to form one large, continuous population; however this hypothesis has not been tested sufficiently. We have genotyped 1,887 samples from 2005 to 2008 from four distinct areas and used the resulting DNA profiles from 146 different individuals to analyze the genetic diversity, population structure, and the migration rates among groups. In addition, we have tested for traces of previous genetic bottlenecks. Individuals from Eastern Finland and Russian Karelia were grouped in the same cluster (“Karelia”), while distinctive subpopulations of brown bears were detected in the north (“Pasvik”), and the east (“Pinega”). All three subpopulations displayed high genetic variation, with expected heterozygosities (HE) of 0.77–0.81, but differentiation among the clusters was relatively low (average FST = 0.051, P < 0.001). No evidence of genetic bottlenecks in the past was found. We detected a highly significant isolation-by-distance (IBD) pattern. For Pasvik, self-recruitment was found to be very high (96%), pointing to the possibility of genetic isolation. In contrast, between Karelia and Pinega we detected high, bi-directional migration rates (~30%), indicating genetic exchange. Conclusively, despite of a substantial influence of IBD on the genetic structure in the region, we detected considerable variation in connectivity among the identified clusters that could not be explained solely by the distance between them.
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21 schema:keywords DNA profiles
22 East
23 Europe
24 Finland
25 IBD
26 Karelia
27 Norway
28 Pasvik
29 Pinega
30 Russia
31 Russian Karelia
32 Western Europe
33 addition
34 animal populations
35 area
36 bear populations
37 bears
38 bi-directional migration rates
39 bottleneck
40 brown bear population
41 brown bears
42 clusters
43 connected territories
44 connectivity
45 considerable variation
46 continuous populations
47 contrast
48 depletion
49 destruction
50 different individuals
51 differentiation
52 distance
53 distance pattern
54 distinct areas
55 distinctive subpopulations
56 diversity
57 eastern Finland
58 evidence
59 exchange
60 fringes
61 genetic bottleneck
62 genetic depletion
63 genetic diversity
64 genetic exchange
65 genetic isolation
66 genetic structure
67 genetic variation
68 group
69 habitat destruction
70 heterozygosity
71 high genetic variation
72 hypothesis
73 individuals
74 influence
75 isolation
76 large brown bear (Ursus arctos) population
77 loss
78 loss of connectivity
79 migration rate
80 north
81 north-western Europe
82 north-western Russia
83 northern Norway
84 past
85 patterns
86 population
87 population structure
88 population subdivision
89 possibility
90 previous genetic bottlenecks
91 profile
92 rate
93 region
94 same cluster
95 samples
96 significant isolation
97 species
98 structure
99 subdivision
100 subpopulations
101 substantial influence
102 territory
103 traces
104 variation
105 western Russia
106 wild animal populations
107 schema:name Connectivity and population subdivision at the fringe of a large brown bear (Ursus arctos) population in North Western Europe
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