Population-level perspectives on global change : genetic and demographic analyses indicate various scales, timing, and causes of scyphozoan jellyfish blooms

Dawson, Michael N., Cieciel, Kristin, Decker, Mary Beth, Hays, Graeme C., Lucas, Cathy H. and Pitt, Kylie A. 2014, Population-level perspectives on global change : genetic and demographic analyses indicate various scales, timing, and causes of scyphozoan jellyfish blooms, Biological Invasions, vol. 17, no. 3, pp. 851-867, doi: 10.1007/s10530-014-0732-z.

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Title Population-level perspectives on global change : genetic and demographic analyses indicate various scales, timing, and causes of scyphozoan jellyfish blooms
Author(s) Dawson, Michael N.
Cieciel, Kristin
Decker, Mary Beth
Hays, Graeme C.ORCID iD for Hays, Graeme C. orcid.org/0000-0002-3314-8189
Lucas, Cathy H.
Pitt, Kylie A.
Journal name Biological Invasions
Volume number 17
Issue number 3
Start page 851
End page 867
Total pages 17
Publisher Springer Netherlands
Place of publication Dordrecht , Netherlands
Publication date 2014-06-17
ISSN 1387-3547
1573-1464
Keyword(s) Climate
Discomedusae
Dispersal
Environmental change
Plankton
Scyphozoa
Summary Whether a perceived increase in the abundance of jellyfishes is related to changing marine environments has been considered primarily using large-scale analyses of multi-species assemblages. Yet jellyfish blooms-rapid increases in the biomass of pelagic coelenterate species-are single-species demographic events. Using published and new genetic analyses and population surveys, we investigate whether there may be a critical knowledge gap between the scales of recent analyses and the scales of natural phenomena. We find that scyphomedusae may show population genetic structure over scales of tens to hundreds of kilometers, that environments vary regionally and locally, and that populations of medusae can display uncorrelated dynamics on these scales. These findings suggest genetic differences between populations and/or environmental differences between sites are important determinants of population dynamics in these jellyfishes. Moreover, the local abundance of medusae may be most strongly correlated with preceding rather than current local environmental conditions, indicating there is a cumulative time-course to the formation of 'blooms'. Broad-scale macro-ecological analyses will need to build from coordinated, long-term, fine-grained studies to synthesize, rather than mask, population-level phenomena in larger-scale analyses. © 2014 Springer International Publishing Switzerland.
Language eng
DOI 10.1007/s10530-014-0732-z
Field of Research 060299 Ecology not elsewhere classified
Socio Economic Objective 960808 Marine Flora
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Springer Netherlands
Persistent URL http://hdl.handle.net/10536/DRO/DU:30070275

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