Individual behaviors dominate the dynamics of an urban mountain lion population isolated by roads

Seth P D Riley, Laurel E K Serieys, John P. Pollinger, Jeffrey A. Sikich, Lisa Dalbeck, Robert K. Wayne, Holly B Ernest

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Large carnivores can be particularly sensitive to the effects of habitat fragmentation on genetic diversity [1, 2]. The Santa Monica Mountains (SMMs), a large natural area within Greater Los Angeles, is completely isolated by urban development and the 101 freeway to the north. Yet the SMMs support a population of mountain lions (Puma concolor), a very rare example of a large carnivore persisting within the boundaries of a megacity. GPS locations of radio-collared lions indicate that freeways are a near-absolute barrier to movement. We genotyped 42 lions using 54 microsatellite loci and found that genetic diversity in SMM lions, prior to 2009, was lower than that for any population in North America except in southern Florida, where inbreeding depression led to reproductive failure [3-5]. We document multiple instances of father-daughter inbreeding and high levels of intraspecific strife, including the unexpected behavior of a male killing two of his offspring and a mate and his son killing two of his brothers. Overall, no individuals from the SMMs have successfully dispersed. Gene flow is critical for this population, and we show that a single male immigrated in 2009, successfully mated, and substantially enhanced genetic diversity. Our results imply that individual behaviors, most likely caused by limited area and reduced opportunities to disperse, may dominate the fate of small, isolated populations of large carnivores. Consequently, comprehensive behavioral monitoring can suggest novel solutions for the persistence of small populations, such as the transfer of individuals across dispersal barriers.

Original languageEnglish (US)
Pages (from-to)1989-1994
Number of pages6
JournalCurrent Biology
Volume24
Issue number17
DOIs
StatePublished - Sep 8 2014

Fingerprint

Puma
Puma concolor
Highway systems
roads
carnivores
Lions
Microsatellite Repeats
Population
Panthera leo
Global positioning system
mountains
Nuclear Family
Genes
genetic variation
Urban Renewal
Monitoring
Inbreeding
urban development
Gene Flow
Los Angeles

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)

Cite this

Riley, S. P. D., Serieys, L. E. K., Pollinger, J. P., Sikich, J. A., Dalbeck, L., Wayne, R. K., & Ernest, H. B. (2014). Individual behaviors dominate the dynamics of an urban mountain lion population isolated by roads. Current Biology, 24(17), 1989-1994. https://doi.org/10.1016/j.cub.2014.07.029

Individual behaviors dominate the dynamics of an urban mountain lion population isolated by roads. / Riley, Seth P D; Serieys, Laurel E K; Pollinger, John P.; Sikich, Jeffrey A.; Dalbeck, Lisa; Wayne, Robert K.; Ernest, Holly B.

In: Current Biology, Vol. 24, No. 17, 08.09.2014, p. 1989-1994.

Research output: Contribution to journalArticle

Riley, SPD, Serieys, LEK, Pollinger, JP, Sikich, JA, Dalbeck, L, Wayne, RK & Ernest, HB 2014, 'Individual behaviors dominate the dynamics of an urban mountain lion population isolated by roads', Current Biology, vol. 24, no. 17, pp. 1989-1994. https://doi.org/10.1016/j.cub.2014.07.029
Riley SPD, Serieys LEK, Pollinger JP, Sikich JA, Dalbeck L, Wayne RK et al. Individual behaviors dominate the dynamics of an urban mountain lion population isolated by roads. Current Biology. 2014 Sep 8;24(17):1989-1994. https://doi.org/10.1016/j.cub.2014.07.029
Riley, Seth P D ; Serieys, Laurel E K ; Pollinger, John P. ; Sikich, Jeffrey A. ; Dalbeck, Lisa ; Wayne, Robert K. ; Ernest, Holly B. / Individual behaviors dominate the dynamics of an urban mountain lion population isolated by roads. In: Current Biology. 2014 ; Vol. 24, No. 17. pp. 1989-1994.
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