The University of Southampton
University of Southampton Institutional Repository

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

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


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.
Climate, Discomedusae, Dispersal, Environmental change, Plankton, Scyphozoa
1387-3547
851-867
Dawson, Michael N
4f598040-1eb1-40ba-a8d3-beb48ca4d19a
Cieciel, Kristin
011b818a-c060-4c25-a105-afbca3064f4a
Decker, Mary Beth
1bb9b7d2-9257-4f44-bda3-8d9a20aa6130
Hays, Graeme C.
b9ce7bc1-c701-4c1b-95bd-7452ed75f4ba
Lucas, Cathy H.
521743e3-b250-4c6b-b084-780af697d6bf
Pitt, Kylie A.
5aa1bb5c-3ee9-4b32-b27f-1f3373989148
Dawson, Michael N
4f598040-1eb1-40ba-a8d3-beb48ca4d19a
Cieciel, Kristin
011b818a-c060-4c25-a105-afbca3064f4a
Decker, Mary Beth
1bb9b7d2-9257-4f44-bda3-8d9a20aa6130
Hays, Graeme C.
b9ce7bc1-c701-4c1b-95bd-7452ed75f4ba
Lucas, Cathy H.
521743e3-b250-4c6b-b084-780af697d6bf
Pitt, Kylie A.
5aa1bb5c-3ee9-4b32-b27f-1f3373989148

Dawson, Michael N, Cieciel, Kristin, Decker, Mary Beth, Hays, Graeme C., Lucas, Cathy H. and Pitt, Kylie A. (2015) Population-level perspectives on global change: genetic and demographic analyses indicate various scales, timing, and causes of scyphozoan jellyfish blooms. Biological Invasions, 17 (3), 851-867. (doi:10.1007/s10530-014-0732-z).

Record type: Article

Abstract



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.

This record has no associated files available for download.

More information

Published date: March 2015
Keywords: Climate, Discomedusae, Dispersal, Environmental change, Plankton, Scyphozoa
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 375973
URI: http://eprints.soton.ac.uk/id/eprint/375973
ISSN: 1387-3547
PURE UUID: afad2b9a-15fa-4264-a896-5373db1ef995
ORCID for Cathy H. Lucas: ORCID iD orcid.org/0000-0002-5929-7481

Catalogue record

Date deposited: 10 Apr 2015 15:06
Last modified: 09 Jan 2022 02:45

Export record

Altmetrics

Contributors

Author: Michael N Dawson
Author: Kristin Cieciel
Author: Mary Beth Decker
Author: Graeme C. Hays
Author: Cathy H. Lucas ORCID iD
Author: Kylie A. Pitt

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×