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Göteborgs universitets publikationer

Identification of subpopulations from connectivity matrices

Författare och institution:
Martin Nilsson Jacobi (Institutionen för energi och miljö, Fysisk resursteori, Chalmers); Carl André (Institutionen för biologi och miljövetenskap, Tjärnö marinbiologiska laboratorium & Linnécentrum för marin evolutionsbiologi (CEMEB)); K. Döös (-); Per R. Jonsson (Institutionen för biologi och miljövetenskap, Tjärnö marinbiologiska laboratorium & Linnécentrum för marin evolutionsbiologi (CEMEB))
Publicerad i:
Ecography, 35 ( 11 ) s. 1004-1016
ISSN:
0906-7590
Publikationstyp:
Artikel, refereegranskad vetenskaplig
Publiceringsår:
2012
Språk:
engelska
Fulltextlänk:
Sammanfattning (abstract):
Dispersal on the landscape/seascape scale may lead to complex spatial population structure with non-synchronous demography and genetic divergence. In this study we present a novel approach to identify subpopulations and dispersal barriers based on estimates of dispersal probabilities on the landscape scale. A theoretical framework is presented where the landscape connectivity matrix is analyzed for clusters as a signature of partially isolated subpopulations. Identification of subpopulations is formulated as a minimization problem with a tuneable penalty term that makes it possible to generate population subdivisions with varying degree of dispersal restrictions. We show that this approach produces superior results compared to alternative standard methods. We apply this theory to a dataset of modeled dispersal probabilities for a sessile marine invertebrate with free-swimming larvae in the Baltic Sea. For a range of critical connectivities we produce a hierarchical partitioning into subpopulations spanning dispersal probabilities that are typical for both genetic divergence and demographic independence. The mapping of subpopulations suggests that the Baltic Sea includes a fine-scale (100600 km) mosaic of invisible dispersal barriers. An analysis of the present network of marine protected areas reveal that protection is very unevenly distributed among the suggested subpopulations. Our approach can be used to assess the location and strength of dispersal barriers in the landscape, and identify conservation units when extensive genotyping is prohibitively costly to cover necessary spatial and temporal scales, e.g. in spatial management of marine populations.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
NATURVETENSKAP ->
Biologiska vetenskaper ->
Ekologi ->
Marin ekologi
Nyckelord:
genetic-structure, population-structure, larval dispersal, community, structure, marine populations, seascape genetics, baltic sea, reef, distance, networks
Postens nummer:
167985
Posten skapad:
2012-12-17 11:48
Posten ändrad:
2016-06-29 10:58

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