Skip to Main Content
Genetic analyses of historic and modern marbled murrelets suggest decoupling of migration and gene flow after habitat fragmentationAuthor(s): M. Zachariah Peery; Laurie A. Hall; Sellas Anna; Steven R. Beissinger; Craig Moritz; Martine Berube; Martin G. Raphael; S. Kim Nelson; Richard T. Golightly; Laura McFarlane-Tranquilla; Scott H. Newman; Per J. Palsboll
Source: Proceedings of the Royal Society B. 277(1682): 697-706
Publication Series: Scientific Journal (JRNL)
Station: Pacific Northwest Research Station
PDF: Download Publication (1.94 MB)
DescriptionThe dispersal of individuals among fragmented populations is generally thought to prevent genetic and demographic isolation, and ultimately reduce extinction risk. In this study, we show that a century of reduction in coastal old-growth forests, as well as a number of other environmental factors, has probably resulted in the genetic divergence of marbled murrelets (Brachyramphus marmoratus) in central California, despite the fact that 7 per cent of modern-sampled murrelets in this population were classified as migrants using genetic assignment tests. Genetic differentiation appears to persist because individuals dispersing from northern populations contributed relatively few young to the central California population, as indicated by the fact that migrants were much less likely to be members of parent-offspring pairs than residents (10.5% versus 45.4%). Moreover, a recent 1.4 percent annual increase in the proportion of migrants in central California, without appreciable reproduction, may have masked an underlying decline in the resident population without resulting in demographic rescue. Our results emphasize the need to understand the behaviour of migrants and the extent to which they contribute offspring in order to determine whether dispersal results in gene flow and prevents declines in resident populations.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationPeery, M. Zachariah; Hall, Laurie A.; Anna, Sellas.; Beissinger, Steven R.; Moritz, Craig; Berube, Martine; Raphael, Martin G.; Nelson, S. Kim; Golightly, Richard T.; McFarlane-Tranquilla, Laura; Newman, Scott H.; Palsboll, Per J. 2010. Genetic analyses of historic and modern marbled murrelets suggest decoupling of migration and gene flow after habitat fragmentation. Proceedings of the Royal Society B. 277(1682): 697-706.
Keywordsdispersal, genetic variation, habitat fragmentation
- Integrating population and genetic monitoring to understand changes in the abundance of a threatened seabird
- Characterizing dispersal patterns in a threatened seabird with limited genetic structure
- Northwest Forest Plan—the first 10 years (1994-2003): status and trends of populations and nesting habitat for the marbled murrelet.
XML: View XML