TitleOcean conditions and bottom-up modifications of gonad development in the sea urchin Strongylocentrotus purpuratus over space and time
Publication TypeJournal Article
Year of Publication2012
AuthorsEbert, TA, Hernandez, JC, Russell, MP
JournalMarine Ecology Progress Series
Volume467
Pagination147-166
Keywordsallometry pacific coast gonad cycle intertidal enso sea surface temperature multivariate enso index latitudinal patterns pacific decadal oscillation northeast pacific el-nino resource-allocation southern-california giant-kelp seasonal acclimatization biol
Abstract

Intraspecific life history attributes of growth, survival, and reproduction can vary in response to changes in the physical environment. These changes can induce a cascading effect across trophic levels. In marine systems, shifts in ocean conditions such as warm and cold phases of ENSO can change primary production in benthic algae, which in turn modify resources available to benthic omnivores. Monthly gonad samples of the purple sea urchin Strongylocentrotus purpuratus were taken from 2007 to mid-2009 at sites from Vancouver Island, Canada, to Punta Baja, Mexico. Although mean sea surface temperature (SST) changed by similar to 8 degrees C from north to south, latitudinal patterns of size-specific gonad weight were not detected, although differences existed across sites. At individual sites, mean SST changed by